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chore: Unify math types, utils and functions (#8389) 

Co-authored-by: dwelle <5153846+dwelle@users.noreply.github.com>
This commit is contained in:
Márk Tolmács 2024-09-03 00:23:38 +02:00 committed by GitHub
parent e3d1dee9d0
commit f4dd23fc31
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GPG Key ID: B5690EEEBB952194
98 changed files with 4291 additions and 3661 deletions
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18
excalidraw-app/components/DebugCanvas.tsx
View File

@ -1,7 +1,6 @@
import { forwardRef, useCallback, useImperativeHandle, useRef } from "react";
import { type AppState } from "../../packages/excalidraw/types";
import { throttleRAF } from "../../packages/excalidraw/utils";
import type { LineSegment } from "../../packages/utils";
import {
bootstrapCanvas,
getNormalizedCanvasDimensions,
@ -13,12 +12,16 @@ import {
TrashIcon,
} from "../../packages/excalidraw/components/icons";
import { STORAGE_KEYS } from "../app_constants";
import { isLineSegment } from "../../packages/excalidraw/element/typeChecks";
import {
isLineSegment,
type GlobalPoint,
type LineSegment,
} from "../../packages/math";
const renderLine = (
context: CanvasRenderingContext2D,
zoom: number,
segment: LineSegment,
segment: LineSegment<GlobalPoint>,
color: string,
) => {
context.save();
@ -47,10 +50,15 @@ const render = (
context: CanvasRenderingContext2D,
appState: AppState,
) => {
frame.forEach((el) => {
frame.forEach((el: DebugElement) => {
switch (true) {
case isLineSegment(el.data):
renderLine(context, appState.zoom.value, el.data, el.color);
renderLine(
context,
appState.zoom.value,
el.data as LineSegment<GlobalPoint>,
el.color,
);
break;
}
});

1
package.json
View File

@ -6,6 +6,7 @@
"excalidraw-app",
"packages/excalidraw",
"packages/utils",
"packages/math",
"examples/excalidraw",
"examples/excalidraw/*"
],

2
packages/excalidraw/actions/actionCanvas.tsx
View File

@ -38,7 +38,7 @@ import { DEFAULT_CANVAS_BACKGROUND_PICKS } from "../colors";
import type { SceneBounds } from "../element/bounds";
import { setCursor } from "../cursor";
import { StoreAction } from "../store";
import { clamp } from "../math";
import { clamp } from "../../math";
export const actionChangeViewBackgroundColor = register({
name: "changeViewBackgroundColor",

13
packages/excalidraw/actions/actionDuplicateSelection.tsx
View File

@ -42,20 +42,21 @@ export const actionDuplicateSelection = register({
perform: (elements, appState, formData, app) => {
// duplicate selected point(s) if editing a line
if (appState.editingLinearElement) {
const ret = LinearElementEditor.duplicateSelectedPoints(
// TODO: Invariants should be checked here instead of duplicateSelectedPoints()
try {
const newAppState = LinearElementEditor.duplicateSelectedPoints(
appState,
app.scene.getNonDeletedElementsMap(),
);
if (!ret) {
return false;
}
return {
elements,
appState: ret.appState,
appState: newAppState,
storeAction: StoreAction.CAPTURE,
};
} catch {
return false;
}
}
return {

9
packages/excalidraw/actions/actionFinalize.tsx
View File

@ -6,7 +6,6 @@ import { done } from "../components/icons";
import { t } from "../i18n";
import { register } from "./register";
import { mutateElement } from "../element/mutateElement";
import { isPathALoop } from "../math";
import { LinearElementEditor } from "../element/linearElementEditor";
import {
maybeBindLinearElement,
@ -16,6 +15,8 @@ import { isBindingElement, isLinearElement } from "../element/typeChecks";
import type { AppState } from "../types";
import { resetCursor } from "../cursor";
import { StoreAction } from "../store";
import { point } from "../../math";
import { isPathALoop } from "../shapes";
export const actionFinalize = register({
name: "finalize",
@ -112,10 +113,10 @@ export const actionFinalize = register({
const linePoints = multiPointElement.points;
const firstPoint = linePoints[0];
mutateElement(multiPointElement, {
points: linePoints.map((point, index) =>
points: linePoints.map((p, index) =>
index === linePoints.length - 1
? ([firstPoint[0], firstPoint[1]] as const)
: point,
? point(firstPoint[0], firstPoint[1])
: p,
),
});
}

10
packages/excalidraw/actions/actionProperties.tsx
View File

@ -1,5 +1,5 @@
import { useEffect, useMemo, useRef, useState } from "react";
import type { AppClassProperties, AppState, Point, Primitive } from "../types";
import type { AppClassProperties, AppState, Primitive } from "../types";
import type { StoreActionType } from "../store";
import {
DEFAULT_ELEMENT_BACKGROUND_COLOR_PALETTE,
@ -115,6 +115,8 @@ import {
} from "../element/binding";
import { mutateElbowArrow } from "../element/routing";
import { LinearElementEditor } from "../element/linearElementEditor";
import type { LocalPoint } from "../../math";
import { point, vector } from "../../math";
const FONT_SIZE_RELATIVE_INCREASE_STEP = 0.1;
@ -1648,10 +1650,10 @@ export const actionChangeArrowType = register({
newElement,
elementsMap,
[finalStartPoint, finalEndPoint].map(
(point) =>
[point[0] - newElement.x, point[1] - newElement.y] as Point,
(p): LocalPoint =>
point(p[0] - newElement.x, p[1] - newElement.y),
),
[0, 0],
vector(0, 0),
{
...(startElement && newElement.startBinding
? {

24
packages/excalidraw/charts.ts
View File

@ -1,3 +1,5 @@
import type { Radians } from "../math";
import { point } from "../math";
import {
COLOR_PALETTE,
DEFAULT_CHART_COLOR_INDEX,
@ -203,7 +205,7 @@ const chartXLabels = (
x: x + index * (BAR_WIDTH + BAR_GAP) + BAR_GAP * 2,
y: y + BAR_GAP / 2,
width: BAR_WIDTH,
angle: 5.87,
angle: 5.87 as Radians,
fontSize: 16,
textAlign: "center",
verticalAlign: "top",
@ -258,10 +260,7 @@ const chartLines = (
x,
y,
width: chartWidth,
points: [
[0, 0],
[chartWidth, 0],
],
points: [point(0, 0), point(chartWidth, 0)],
});
const yLine = newLinearElement({
@ -272,10 +271,7 @@ const chartLines = (
x,
y,
height: chartHeight,
points: [
[0, 0],
[0, -chartHeight],
],
points: [point(0, 0), point(0, -chartHeight)],
});
const maxLine = newLinearElement({
@ -288,10 +284,7 @@ const chartLines = (
strokeStyle: "dotted",
width: chartWidth,
opacity: GRID_OPACITY,
points: [
[0, 0],
[chartWidth, 0],
],
points: [point(0, 0), point(chartWidth, 0)],
});
return [xLine, yLine, maxLine];
@ -448,10 +441,7 @@ const chartTypeLine = (
height: cy,
strokeStyle: "dotted",
opacity: GRID_OPACITY,
points: [
[0, 0],
[0, cy],
],
points: [point(0, 0), point(0, cy)],
});
});

134
packages/excalidraw/components/App.tsx
View File

@ -210,12 +210,6 @@ import {
isElementCompletelyInViewport,
isElementInViewport,
} from "../element/sizeHelpers";
import {
distance2d,
getCornerRadius,
getGridPoint,
isPathALoop,
} from "../math";
import {
calculateScrollCenter,
getElementsWithinSelection,
@ -230,7 +224,13 @@ import type {
ScrollBars,
} from "../scene/types";
import { getStateForZoom } from "../scene/zoom";
import { findShapeByKey, getBoundTextShape, getElementShape } from "../shapes";
import {
findShapeByKey,
getBoundTextShape,
getCornerRadius,
getElementShape,
isPathALoop,
} from "../shapes";
import { getSelectionBoxShape } from "../../utils/geometry/shape";
import { isPointInShape } from "../../utils/collision";
import type {
@ -386,6 +386,7 @@ import {
getReferenceSnapPoints,
SnapCache,
isGridModeEnabled,
getGridPoint,
} from "../snapping";
import { actionWrapTextInContainer } from "../actions/actionBoundText";
import BraveMeasureTextError from "./BraveMeasureTextError";
@ -439,6 +440,8 @@ import {
FlowChartNavigator,
getLinkDirectionFromKey,
} from "../element/flowchart";
import type { LocalPoint, Radians } from "../../math";
import { point, pointDistance, vector } from "../../math";
const AppContext = React.createContext<AppClassProperties>(null!);
const AppPropsContext = React.createContext<AppProps>(null!);
@ -4844,7 +4847,7 @@ class App extends React.Component<AppProps, AppState> {
this.getElementHitThreshold(),
);
return isPointInShape([x, y], selectionShape);
return isPointInShape(point(x, y), selectionShape);
}
// take bound text element into consideration for hit collision as well
@ -5035,7 +5038,7 @@ class App extends React.Component<AppProps, AppState> {
containerId: shouldBindToContainer ? container?.id : undefined,
groupIds: container?.groupIds ?? [],
lineHeight,
angle: container?.angle ?? 0,
angle: container?.angle ?? (0 as Radians),
frameId: topLayerFrame ? topLayerFrame.id : null,
});
@ -5203,7 +5206,7 @@ class App extends React.Component<AppProps, AppState> {
element,
this.scene.getNonDeletedElementsMap(),
this.state,
[scenePointer.x, scenePointer.y],
point(scenePointer.x, scenePointer.y),
this.device.editor.isMobile,
)
);
@ -5214,11 +5217,12 @@ class App extends React.Component<AppProps, AppState> {
event: React.PointerEvent<HTMLCanvasElement>,
isTouchScreen: boolean,
) => {
const draggedDistance = distance2d(
const draggedDistance = pointDistance(
point(
this.lastPointerDownEvent!.clientX,
this.lastPointerDownEvent!.clientY,
this.lastPointerUpEvent!.clientX,
this.lastPointerUpEvent!.clientY,
),
point(this.lastPointerUpEvent!.clientX, this.lastPointerUpEvent!.clientY),
);
if (
!this.hitLinkElement ||
@ -5237,7 +5241,7 @@ class App extends React.Component<AppProps, AppState> {
this.hitLinkElement,
elementsMap,
this.state,
[lastPointerDownCoords.x, lastPointerDownCoords.y],
point(lastPointerDownCoords.x, lastPointerDownCoords.y),
this.device.editor.isMobile,
);
const lastPointerUpCoords = viewportCoordsToSceneCoords(
@ -5248,7 +5252,7 @@ class App extends React.Component<AppProps, AppState> {
this.hitLinkElement,
elementsMap,
this.state,
[lastPointerUpCoords.x, lastPointerUpCoords.y],
point(lastPointerUpCoords.x, lastPointerUpCoords.y),
this.device.editor.isMobile,
);
if (lastPointerDownHittingLinkIcon && lastPointerUpHittingLinkIcon) {
@ -5497,17 +5501,18 @@ class App extends React.Component<AppProps, AppState> {
// if we haven't yet created a temp point and we're beyond commit-zone
// threshold, add a point
if (
distance2d(
scenePointerX - rx,
scenePointerY - ry,
lastPoint[0],
lastPoint[1],
pointDistance(
point(scenePointerX - rx, scenePointerY - ry),
lastPoint,
) >= LINE_CONFIRM_THRESHOLD
) {
mutateElement(
multiElement,
{
points: [...points, [scenePointerX - rx, scenePointerY - ry]],
points: [
...points,
point<LocalPoint>(scenePointerX - rx, scenePointerY - ry),
],
},
false,
);
@ -5519,11 +5524,9 @@ class App extends React.Component<AppProps, AppState> {
} else if (
points.length > 2 &&
lastCommittedPoint &&
distance2d(
scenePointerX - rx,
scenePointerY - ry,
lastCommittedPoint[0],
lastCommittedPoint[1],
pointDistance(
point(scenePointerX - rx, scenePointerY - ry),
lastCommittedPoint,
) < LINE_CONFIRM_THRESHOLD
) {
setCursor(this.interactiveCanvas, CURSOR_TYPE.POINTER);
@ -5570,10 +5573,10 @@ class App extends React.Component<AppProps, AppState> {
this.scene.getNonDeletedElementsMap(),
[
...points.slice(0, -1),
[
point<LocalPoint>(
lastCommittedX + dxFromLastCommitted,
lastCommittedY + dyFromLastCommitted,
],
),
],
undefined,
undefined,
@ -5589,10 +5592,10 @@ class App extends React.Component<AppProps, AppState> {
{
points: [
...points.slice(0, -1),
[
point<LocalPoint>(
lastCommittedX + dxFromLastCommitted,
lastCommittedY + dyFromLastCommitted,
],
),
],
},
false,
@ -5817,17 +5820,15 @@ class App extends React.Component<AppProps, AppState> {
}
};
const distance = distance2d(
pointerDownState.lastCoords.x,
pointerDownState.lastCoords.y,
scenePointer.x,
scenePointer.y,
const distance = pointDistance(
point(pointerDownState.lastCoords.x, pointerDownState.lastCoords.y),
point(scenePointer.x, scenePointer.y),
);
const threshold = this.getElementHitThreshold();
const point = { ...pointerDownState.lastCoords };
const p = { ...pointerDownState.lastCoords };
let samplingInterval = 0;
while (samplingInterval <= distance) {
const hitElements = this.getElementsAtPosition(point.x, point.y);
const hitElements = this.getElementsAtPosition(p.x, p.y);
processElements(hitElements);
// Exit since we reached current point
@ -5839,12 +5840,10 @@ class App extends React.Component<AppProps, AppState> {
samplingInterval = Math.min(samplingInterval + threshold, distance);
const distanceRatio = samplingInterval / distance;
const nextX =
(1 - distanceRatio) * point.x + distanceRatio * scenePointer.x;
const nextY =
(1 - distanceRatio) * point.y + distanceRatio * scenePointer.y;
point.x = nextX;
point.y = nextY;
const nextX = (1 - distanceRatio) * p.x + distanceRatio * scenePointer.x;
const nextY = (1 - distanceRatio) * p.y + distanceRatio * scenePointer.y;
p.x = nextX;
p.y = nextY;
}
pointerDownState.lastCoords.x = scenePointer.x;
@ -6325,7 +6324,7 @@ class App extends React.Component<AppProps, AppState> {
this.hitLinkElement,
this.scene.getNonDeletedElementsMap(),
this.state,
[scenePointer.x, scenePointer.y],
point(scenePointer.x, scenePointer.y),
)
) {
this.handleEmbeddableCenterClick(this.hitLinkElement);
@ -7008,7 +7007,7 @@ class App extends React.Component<AppProps, AppState> {
simulatePressure,
locked: false,
frameId: topLayerFrame ? topLayerFrame.id : null,
points: [[0, 0]],
points: [point<LocalPoint>(0, 0)],
pressures: simulatePressure ? [] : [event.pressure],
});
@ -7216,11 +7215,9 @@ class App extends React.Component<AppProps, AppState> {
if (
multiElement.points.length > 1 &&
lastCommittedPoint &&
distance2d(
pointerDownState.origin.x - rx,
pointerDownState.origin.y - ry,
lastCommittedPoint[0],
lastCommittedPoint[1],
pointDistance(
point(pointerDownState.origin.x - rx, pointerDownState.origin.y - ry),
lastCommittedPoint,
) < LINE_CONFIRM_THRESHOLD
) {
this.actionManager.executeAction(actionFinalize);
@ -7321,7 +7318,7 @@ class App extends React.Component<AppProps, AppState> {
};
});
mutateElement(element, {
points: [...element.points, [0, 0]],
points: [...element.points, point<LocalPoint>(0, 0)],
});
const boundElement = getHoveredElementForBinding(
pointerDownState.origin,
@ -7573,11 +7570,9 @@ class App extends React.Component<AppProps, AppState> {
this.state.activeTool.type === "line")
) {
if (
distance2d(
pointerCoords.x,
pointerCoords.y,
pointerDownState.origin.x,
pointerDownState.origin.y,
pointDistance(
point(pointerCoords.x, pointerCoords.y),
point(pointerDownState.origin.x, pointerDownState.origin.y),
) < DRAGGING_THRESHOLD
) {
return;
@ -7926,7 +7921,7 @@ class App extends React.Component<AppProps, AppState> {
mutateElement(
newElement,
{
points: [...points, [dx, dy]],
points: [...points, point<LocalPoint>(dx, dy)],
pressures,
},
false,
@ -7955,7 +7950,7 @@ class App extends React.Component<AppProps, AppState> {
mutateElement(
newElement,
{
points: [...points, [dx, dy]],
points: [...points, point<LocalPoint>(dx, dy)],
},
false,
);
@ -7963,8 +7958,8 @@ class App extends React.Component<AppProps, AppState> {
mutateElbowArrow(
newElement,
elementsMap,
[...points.slice(0, -1), [dx, dy]],
[0, 0],
[...points.slice(0, -1), point<LocalPoint>(dx, dy)],
vector(0, 0),
undefined,
{
isDragging: true,
@ -7975,7 +7970,7 @@ class App extends React.Component<AppProps, AppState> {
mutateElement(
newElement,
{
points: [...points.slice(0, -1), [dx, dy]],
points: [...points.slice(0, -1), point<LocalPoint>(dx, dy)],
},
false,
);
@ -8284,9 +8279,9 @@ class App extends React.Component<AppProps, AppState> {
: [...newElement.pressures, childEvent.pressure];
mutateElement(newElement, {
points: [...points, [dx, dy]],
points: [...points, point<LocalPoint>(dx, dy)],
pressures,
lastCommittedPoint: [dx, dy],
lastCommittedPoint: point<LocalPoint>(dx, dy),
});
this.actionManager.executeAction(actionFinalize);
@ -8333,7 +8328,10 @@ class App extends React.Component<AppProps, AppState> {
mutateElement(newElement, {
points: [
...newElement.points,
[pointerCoords.x - newElement.x, pointerCoords.y - newElement.y],
point<LocalPoint>(
pointerCoords.x - newElement.x,
pointerCoords.y - newElement.y,
),
],
});
this.setState({
@ -8643,11 +8641,9 @@ class App extends React.Component<AppProps, AppState> {
if (isEraserActive(this.state) && pointerStart && pointerEnd) {
this.eraserTrail.endPath();
const draggedDistance = distance2d(
pointerStart.clientX,
pointerStart.clientY,
pointerEnd.clientX,
pointerEnd.clientY,
const draggedDistance = pointDistance(
point(pointerStart.clientX, pointerStart.clientY),
point(pointerEnd.clientX, pointerEnd.clientY),
);
if (draggedDistance === 0) {

11
packages/excalidraw/components/Stats/Angle.tsx
View File

@ -2,13 +2,14 @@ import { mutateElement } from "../../element/mutateElement";
import { getBoundTextElement } from "../../element/textElement";
import { isArrowElement, isElbowArrow } from "../../element/typeChecks";
import type { ExcalidrawElement } from "../../element/types";
import { degreeToRadian, radianToDegree } from "../../math";
import { angleIcon } from "../icons";
import DragInput from "./DragInput";
import type { DragInputCallbackType } from "./DragInput";
import { getStepSizedValue, isPropertyEditable, updateBindings } from "./utils";
import type Scene from "../../scene/Scene";
import type { AppState } from "../../types";
import type { Degrees } from "../../../math";
import { degreesToRadians, radiansToDegrees } from "../../../math";
interface AngleProps {
element: ExcalidrawElement;
@ -36,7 +37,7 @@ const handleDegreeChange: DragInputCallbackType<AngleProps["property"]> = ({
}
if (nextValue !== undefined) {
const nextAngle = degreeToRadian(nextValue);
const nextAngle = degreesToRadians(nextValue as Degrees);
mutateElement(latestElement, {
angle: nextAngle,
});
@ -51,7 +52,7 @@ const handleDegreeChange: DragInputCallbackType<AngleProps["property"]> = ({
}
const originalAngleInDegrees =
Math.round(radianToDegree(origElement.angle) * 100) / 100;
Math.round(radiansToDegrees(origElement.angle) * 100) / 100;
const changeInDegrees = Math.round(accumulatedChange);
let nextAngleInDegrees = (originalAngleInDegrees + changeInDegrees) % 360;
if (shouldChangeByStepSize) {
@ -61,7 +62,7 @@ const handleDegreeChange: DragInputCallbackType<AngleProps["property"]> = ({
nextAngleInDegrees =
nextAngleInDegrees < 0 ? nextAngleInDegrees + 360 : nextAngleInDegrees;
const nextAngle = degreeToRadian(nextAngleInDegrees);
const nextAngle = degreesToRadians(nextAngleInDegrees as Degrees);
mutateElement(latestElement, {
angle: nextAngle,
@ -80,7 +81,7 @@ const Angle = ({ element, scene, appState, property }: AngleProps) => {
<DragInput
label="A"
icon={angleIcon}
value={Math.round((radianToDegree(element.angle) % 360) * 100) / 100}
value={Math.round((radiansToDegrees(element.angle) % 360) * 100) / 100}
elements={[element]}
dragInputCallback={handleDegreeChange}
editable={isPropertyEditable(element, "angle")}

11
packages/excalidraw/components/Stats/MultiAngle.tsx
View File

@ -3,13 +3,14 @@ import { getBoundTextElement } from "../../element/textElement";
import { isArrowElement } from "../../element/typeChecks";
import type { ExcalidrawElement } from "../../element/types";
import { isInGroup } from "../../groups";
import { degreeToRadian, radianToDegree } from "../../math";
import type Scene from "../../scene/Scene";
import { angleIcon } from "../icons";
import DragInput from "./DragInput";
import type { DragInputCallbackType } from "./DragInput";
import { getStepSizedValue, isPropertyEditable } from "./utils";
import type { AppState } from "../../types";
import type { Degrees } from "../../../math";
import { degreesToRadians, radiansToDegrees } from "../../../math";
interface MultiAngleProps {
elements: readonly ExcalidrawElement[];
@ -39,7 +40,7 @@ const handleDegreeChange: DragInputCallbackType<
);
if (nextValue !== undefined) {
const nextAngle = degreeToRadian(nextValue);
const nextAngle = degreesToRadians(nextValue as Degrees);
for (const element of editableLatestIndividualElements) {
if (!element) {
@ -71,7 +72,7 @@ const handleDegreeChange: DragInputCallbackType<
}
const originalElement = editableOriginalIndividualElements[i];
const originalAngleInDegrees =
Math.round(radianToDegree(originalElement.angle) * 100) / 100;
Math.round(radiansToDegrees(originalElement.angle) * 100) / 100;
const changeInDegrees = Math.round(accumulatedChange);
let nextAngleInDegrees = (originalAngleInDegrees + changeInDegrees) % 360;
if (shouldChangeByStepSize) {
@ -81,7 +82,7 @@ const handleDegreeChange: DragInputCallbackType<
nextAngleInDegrees =
nextAngleInDegrees < 0 ? nextAngleInDegrees + 360 : nextAngleInDegrees;
const nextAngle = degreeToRadian(nextAngleInDegrees);
const nextAngle = degreesToRadians(nextAngleInDegrees as Degrees);
mutateElement(
latestElement,
@ -109,7 +110,7 @@ const MultiAngle = ({
(el) => !isInGroup(el) && isPropertyEditable(el, "angle"),
);
const angles = editableLatestIndividualElements.map(
(el) => Math.round((radianToDegree(el.angle) % 360) * 100) / 100,
(el) => Math.round((radiansToDegrees(el.angle) % 360) * 100) / 100,
);
const value = new Set(angles).size === 1 ? angles[0] : "Mixed";

9
packages/excalidraw/components/Stats/MultiDimension.tsx
View File

@ -13,13 +13,14 @@ import type {
NonDeletedSceneElementsMap,
} from "../../element/types";
import type Scene from "../../scene/Scene";
import type { AppState, Point } from "../../types";
import type { AppState } from "../../types";
import DragInput from "./DragInput";
import type { DragInputCallbackType } from "./DragInput";
import { getAtomicUnits, getStepSizedValue, isPropertyEditable } from "./utils";
import { getElementsInAtomicUnit, resizeElement } from "./utils";
import type { AtomicUnit } from "./utils";
import { MIN_WIDTH_OR_HEIGHT } from "../../constants";
import { point, type GlobalPoint } from "../../../math";
interface MultiDimensionProps {
property: "width" | "height";
@ -104,7 +105,7 @@ const resizeGroup = (
nextHeight: number,
initialHeight: number,
aspectRatio: number,
anchor: Point,
anchor: GlobalPoint,
property: MultiDimensionProps["property"],
latestElements: ExcalidrawElement[],
originalElements: ExcalidrawElement[],
@ -181,7 +182,7 @@ const handleDimensionChange: DragInputCallbackType<
nextHeight,
initialHeight,
aspectRatio,
[x1, y1],
point(x1, y1),
property,
latestElements,
originalElements,
@ -286,7 +287,7 @@ const handleDimensionChange: DragInputCallbackType<
nextHeight,
initialHeight,
aspectRatio,
[x1, y1],
point(x1, y1),
property,
latestElements,
originalElements,

32
packages/excalidraw/components/Stats/MultiPosition.tsx
View File

@ -4,7 +4,6 @@ import type {
NonDeletedExcalidrawElement,
NonDeletedSceneElementsMap,
} from "../../element/types";
import { rotate } from "../../math";
import type Scene from "../../scene/Scene";
import StatsDragInput from "./DragInput";
import type { DragInputCallbackType } from "./DragInput";
@ -14,6 +13,7 @@ import { useMemo } from "react";
import { getElementsInAtomicUnit, moveElement } from "./utils";
import type { AtomicUnit } from "./utils";
import type { AppState } from "../../types";
import { point, pointRotateRads } from "../../../math";
interface MultiPositionProps {
property: "x" | "y";
@ -43,11 +43,9 @@ const moveElements = (
origElement.x + origElement.width / 2,
origElement.y + origElement.height / 2,
];
const [topLeftX, topLeftY] = rotate(
origElement.x,
origElement.y,
cx,
cy,
const [topLeftX, topLeftY] = pointRotateRads(
point(origElement.x, origElement.y),
point(cx, cy),
origElement.angle,
);
@ -98,11 +96,9 @@ const moveGroupTo = (
latestElement.y + latestElement.height / 2,
];
const [topLeftX, topLeftY] = rotate(
latestElement.x,
latestElement.y,
cx,
cy,
const [topLeftX, topLeftY] = pointRotateRads(
point(latestElement.x, latestElement.y),
point(cx, cy),
latestElement.angle,
);
@ -174,11 +170,9 @@ const handlePositionChange: DragInputCallbackType<
origElement.x + origElement.width / 2,
origElement.y + origElement.height / 2,
];
const [topLeftX, topLeftY] = rotate(
origElement.x,
origElement.y,
cx,
cy,
const [topLeftX, topLeftY] = pointRotateRads(
point(origElement.x, origElement.y),
point(cx, cy),
origElement.angle,
);
@ -246,7 +240,11 @@ const MultiPosition = ({
const [el] = elementsInUnit;
const [cx, cy] = [el.x + el.width / 2, el.y + el.height / 2];
const [topLeftX, topLeftY] = rotate(el.x, el.y, cx, cy, el.angle);
const [topLeftX, topLeftY] = pointRotateRads(
point(el.x, el.y),
point(cx, cy),
el.angle,
);
return Math.round((property === "x" ? topLeftX : topLeftY) * 100) / 100;
}),

18
packages/excalidraw/components/Stats/Position.tsx
View File

@ -1,10 +1,10 @@
import type { ElementsMap, ExcalidrawElement } from "../../element/types";
import { rotate } from "../../math";
import StatsDragInput from "./DragInput";
import type { DragInputCallbackType } from "./DragInput";
import { getStepSizedValue, moveElement } from "./utils";
import type Scene from "../../scene/Scene";
import type { AppState } from "../../types";
import { point, pointRotateRads } from "../../../math";
interface PositionProps {
property: "x" | "y";
@ -32,11 +32,9 @@ const handlePositionChange: DragInputCallbackType<"x" | "y"> = ({
origElement.x + origElement.width / 2,
origElement.y + origElement.height / 2,
];
const [topLeftX, topLeftY] = rotate(
origElement.x,
origElement.y,
cx,
cy,
const [topLeftX, topLeftY] = pointRotateRads(
point(origElement.x, origElement.y),
point(cx, cy),
origElement.angle,
);
@ -94,11 +92,9 @@ const Position = ({
scene,
appState,
}: PositionProps) => {
const [topLeftX, topLeftY] = rotate(
element.x,
element.y,
element.x + element.width / 2,
element.y + element.height / 2,
const [topLeftX, topLeftY] = pointRotateRads(
point(element.x, element.y),
point(element.x + element.width / 2, element.y + element.height / 2),
element.angle,
);
const value =

57
packages/excalidraw/components/Stats/stats.test.tsx
View File

@ -19,12 +19,13 @@ import type {
ExcalidrawLinearElement,
ExcalidrawTextElement,
} from "../../element/types";
import { degreeToRadian, rotate } from "../../math";
import { getTextEditor, updateTextEditor } from "../../tests/queries/dom";
import { getCommonBounds, isTextElement } from "../../element";
import { API } from "../../tests/helpers/api";
import { actionGroup } from "../../actions";
import { isInGroup } from "../../groups";
import type { Degrees } from "../../../math";
import { degreesToRadians, point, pointRotateRads } from "../../../math";
const { h } = window;
const mouse = new Pointer("mouse");
@ -46,7 +47,9 @@ const testInputProperty = (
expect(input.value).toBe(initialValue.toString());
UI.updateInput(input, String(nextValue));
if (property === "angle") {
expect(element[property]).toBe(degreeToRadian(Number(nextValue)));
expect(element[property]).toBe(
degreesToRadians(Number(nextValue) as Degrees),
);
} else if (property === "fontSize" && isTextElement(element)) {
expect(element[property]).toBe(Number(nextValue));
} else if (property !== "fontSize") {
@ -260,11 +263,9 @@ describe("stats for a generic element", () => {
rectangle.x + rectangle.width / 2,
rectangle.y + rectangle.height / 2,
];
const [topLeftX, topLeftY] = rotate(
rectangle.x,
rectangle.y,
cx,
cy,
const [topLeftX, topLeftY] = pointRotateRads(
point(rectangle.x, rectangle.y),
point(cx, cy),
rectangle.angle,
);
@ -281,11 +282,9 @@ describe("stats for a generic element", () => {
testInputProperty(rectangle, "angle", "A", 0, 45);
let [newTopLeftX, newTopLeftY] = rotate(
rectangle.x,
rectangle.y,
cx,
cy,
let [newTopLeftX, newTopLeftY] = pointRotateRads(
point(rectangle.x, rectangle.y),
point(cx, cy),
rectangle.angle,
);
@ -294,11 +293,9 @@ describe("stats for a generic element", () => {
testInputProperty(rectangle, "angle", "A", 45, 66);
[newTopLeftX, newTopLeftY] = rotate(
rectangle.x,
rectangle.y,
cx,
cy,
[newTopLeftX, newTopLeftY] = pointRotateRads(
point(rectangle.x, rectangle.y),
point(cx, cy),
rectangle.angle,
);
expect(newTopLeftX.toString()).not.toEqual(xInput.value);
@ -313,11 +310,9 @@ describe("stats for a generic element", () => {
rectangle.x + rectangle.width / 2,
rectangle.y + rectangle.height / 2,
];
const [topLeftX, topLeftY] = rotate(
rectangle.x,
rectangle.y,
cx,
cy,
const [topLeftX, topLeftY] = pointRotateRads(
point(rectangle.x, rectangle.y),
point(cx, cy),
rectangle.angle,
);
testInputProperty(rectangle, "width", "W", rectangle.width, 400);
@ -325,11 +320,9 @@ describe("stats for a generic element", () => {
rectangle.x + rectangle.width / 2,
rectangle.y + rectangle.height / 2,
];
let [currentTopLeftX, currentTopLeftY] = rotate(
rectangle.x,
rectangle.y,
cx,
cy,
let [currentTopLeftX, currentTopLeftY] = pointRotateRads(
point(rectangle.x, rectangle.y),
point(cx, cy),
rectangle.angle,
);
expect(currentTopLeftX).toBeCloseTo(topLeftX, 4);
@ -340,11 +333,9 @@ describe("stats for a generic element", () => {
rectangle.x + rectangle.width / 2,
rectangle.y + rectangle.height / 2,
];
[currentTopLeftX, currentTopLeftY] = rotate(
rectangle.x,
rectangle.y,
cx,
cy,
[currentTopLeftX, currentTopLeftY] = pointRotateRads(
point(rectangle.x, rectangle.y),
point(cx, cy),
rectangle.angle,
);
@ -642,7 +633,7 @@ describe("stats for multiple elements", () => {
UI.updateInput(angle, "40");
const angleInRadian = degreeToRadian(40);
const angleInRadian = degreesToRadians(40 as Degrees);
expect(rectangle?.angle).toBeCloseTo(angleInRadian, 4);
expect(text?.angle).toBeCloseTo(angleInRadian, 4);
expect(frame.angle).toBe(0);

21
packages/excalidraw/components/Stats/utils.ts
View File

@ -1,3 +1,5 @@
import type { Radians } from "../../../math";
import { point, pointRotateRads } from "../../../math";
import {
bindOrUnbindLinearElements,
updateBoundElements,
@ -30,7 +32,6 @@ import {
getElementsInGroup,
isInGroup,
} from "../../groups";
import { rotate } from "../../math";
import type Scene from "../../scene/Scene";
import type { AppState } from "../../types";
import { getFontString } from "../../utils";
@ -229,23 +230,19 @@ export const moveElement = (
originalElement.x + originalElement.width / 2,
originalElement.y + originalElement.height / 2,
];
const [topLeftX, topLeftY] = rotate(
originalElement.x,
originalElement.y,
cx,
cy,
const [topLeftX, topLeftY] = pointRotateRads(
point(originalElement.x, originalElement.y),
point(cx, cy),
originalElement.angle,
);
const changeInX = newTopLeftX - topLeftX;
const changeInY = newTopLeftY - topLeftY;
const [x, y] = rotate(
newTopLeftX,
newTopLeftY,
cx + changeInX,
cy + changeInY,
-originalElement.angle,
const [x, y] = pointRotateRads(
point(newTopLeftX, newTopLeftY),
point(cx + changeInX, cy + changeInY),
-originalElement.angle as Radians,
);
mutateElement(

2
packages/excalidraw/components/TTDDialog/TTDDialog.tsx
View File

@ -25,11 +25,11 @@ import type { BinaryFiles } from "../../types";
import { ArrowRightIcon } from "../icons";
import "./TTDDialog.scss";
import { isFiniteNumber } from "../../utils";
import { atom, useAtom } from "jotai";
import { trackEvent } from "../../analytics";
import { InlineIcon } from "../InlineIcon";
import { TTDDialogSubmitShortcut } from "./TTDDialogSubmitShortcut";
import { isFiniteNumber } from "../../../math";
const MIN_PROMPT_LENGTH = 3;
const MAX_PROMPT_LENGTH = 1000;

15
packages/excalidraw/components/hyperlink/Hyperlink.tsx
View File

@ -1,4 +1,4 @@
import type { AppState, ExcalidrawProps, Point, UIAppState } from "../../types";
import type { AppState, ExcalidrawProps, UIAppState } from "../../types";
import {
sceneCoordsToViewportCoords,
viewportCoordsToSceneCoords,
@ -36,6 +36,7 @@ import { trackEvent } from "../../analytics";
import { useAppProps, useExcalidrawAppState } from "../App";
import { isEmbeddableElement } from "../../element/typeChecks";
import { getLinkHandleFromCoords } from "./helpers";
import { point, type GlobalPoint } from "../../../math";
const CONTAINER_WIDTH = 320;
const SPACE_BOTTOM = 85;
@ -176,10 +177,12 @@ export const Hyperlink = ({
if (timeoutId) {
clearTimeout(timeoutId);
}
const shouldHide = shouldHideLinkPopup(element, elementsMap, appState, [
event.clientX,
event.clientY,
]) as boolean;
const shouldHide = shouldHideLinkPopup(
element,
elementsMap,
appState,
point(event.clientX, event.clientY),
) as boolean;
if (shouldHide) {
timeoutId = window.setTimeout(() => {
setAppState({ showHyperlinkPopup: false });
@ -416,7 +419,7 @@ const shouldHideLinkPopup = (
element: NonDeletedExcalidrawElement,
elementsMap: ElementsMap,
appState: AppState,
[clientX, clientY]: Point,
[clientX, clientY]: GlobalPoint,
): Boolean => {
const { x: sceneX, y: sceneY } = viewportCoordsToSceneCoords(
{ clientX, clientY },

21
packages/excalidraw/components/hyperlink/helpers.ts
View File

@ -1,3 +1,5 @@
import type { GlobalPoint, Radians } from "../../../math";
import { point, pointRotateRads } from "../../../math";
import { MIME_TYPES } from "../../constants";
import type { Bounds } from "../../element/bounds";
import { getElementAbsoluteCoords } from "../../element/bounds";
@ -6,9 +8,8 @@ import type {
ElementsMap,
NonDeletedExcalidrawElement,
} from "../../element/types";
import { rotate } from "../../math";
import { DEFAULT_LINK_SIZE } from "../../renderer/renderElement";
import type { AppState, Point, UIAppState } from "../../types";
import type { AppState, UIAppState } from "../../types";
export const EXTERNAL_LINK_IMG = document.createElement("img");
EXTERNAL_LINK_IMG.src = `data:${MIME_TYPES.svg}, ${encodeURIComponent(
@ -17,7 +18,7 @@ EXTERNAL_LINK_IMG.src = `data:${MIME_TYPES.svg}, ${encodeURIComponent(
export const getLinkHandleFromCoords = (
[x1, y1, x2, y2]: Bounds,
angle: number,
angle: Radians,
appState: Pick<UIAppState, "zoom">,
): Bounds => {
const size = DEFAULT_LINK_SIZE;
@ -33,11 +34,9 @@ export const getLinkHandleFromCoords = (
const x = x2 + dashedLineMargin - centeringOffset;
const y = y1 - dashedLineMargin - linkMarginY + centeringOffset;
const [rotatedX, rotatedY] = rotate(
x + linkWidth / 2,
y + linkHeight / 2,
centerX,
centerY,
const [rotatedX, rotatedY] = pointRotateRads(
point(x + linkWidth / 2, y + linkHeight / 2),
point(centerX, centerY),
angle,
);
return [
@ -52,7 +51,7 @@ export const isPointHittingLinkIcon = (
element: NonDeletedExcalidrawElement,
elementsMap: ElementsMap,
appState: AppState,
[x, y]: Point,
[x, y]: GlobalPoint,
) => {
const threshold = 4 / appState.zoom.value;
const [x1, y1, x2, y2] = getElementAbsoluteCoords(element, elementsMap);
@ -73,7 +72,7 @@ export const isPointHittingLink = (
element: NonDeletedExcalidrawElement,
elementsMap: ElementsMap,
appState: AppState,
[x, y]: Point,
[x, y]: GlobalPoint,
isMobile: boolean,
) => {
if (!element.link || appState.selectedElementIds[element.id]) {
@ -86,5 +85,5 @@ export const isPointHittingLink = (
) {
return true;
}
return isPointHittingLinkIcon(element, elementsMap, appState, [x, y]);
return isPointHittingLinkIcon(element, elementsMap, appState, point(x, y));
};

26
packages/excalidraw/data/restore.ts
View File

@ -40,11 +40,7 @@ import {
import { getDefaultAppState } from "../appState";
import { LinearElementEditor } from "../element/linearElementEditor";
import { bumpVersion } from "../element/mutateElement";
import {
getUpdatedTimestamp,
isFiniteNumber,
updateActiveTool,
} from "../utils";
import { getUpdatedTimestamp, updateActiveTool } from "../utils";
import { arrayToMap } from "../utils";
import type { MarkOptional, Mutable } from "../utility-types";
import { detectLineHeight, getContainerElement } from "../element/textElement";
@ -58,6 +54,8 @@ import {
getNormalizedGridStep,
getNormalizedZoom,
} from "../scene";
import type { LocalPoint, Radians } from "../../math";
import { isFiniteNumber, point } from "../../math";
type RestoredAppState = Omit<
AppState,
@ -152,7 +150,7 @@ const restoreElementWithProperties = <
roughness: element.roughness ?? DEFAULT_ELEMENT_PROPS.roughness,
opacity:
element.opacity == null ? DEFAULT_ELEMENT_PROPS.opacity : element.opacity,
angle: element.angle || 0,
angle: element.angle || (0 as Radians),
x: extra.x ?? element.x ?? 0,
y: extra.y ?? element.y ?? 0,
strokeColor: element.strokeColor || DEFAULT_ELEMENT_PROPS.strokeColor,
@ -266,10 +264,7 @@ const restoreElement = (
let y = element.y;
let points = // migrate old arrow model to new one
!Array.isArray(element.points) || element.points.length < 2
? [
[0, 0],
[element.width, element.height],
]
? [point(0, 0), point(element.width, element.height)]
: element.points;
if (points[0][0] !== 0 || points[0][1] !== 0) {
@ -293,14 +288,11 @@ const restoreElement = (
});
case "arrow": {
const { startArrowhead = null, endArrowhead = "arrow" } = element;
let x = element.x;
let y = element.y;
let points = // migrate old arrow model to new one
let x: number | undefined = element.x;
let y: number | undefined = element.y;
let points: readonly LocalPoint[] | undefined = // migrate old arrow model to new one
!Array.isArray(element.points) || element.points.length < 2
? [
[0, 0],
[element.width, element.height],
]
? [point(0, 0), point(element.width, element.height)]
: element.points;
if (points[0][0] !== 0 || points[0][1] !== 0) {

8
packages/excalidraw/data/transform.test.ts
View File

@ -2,6 +2,7 @@ import { vi } from "vitest";
import type { ExcalidrawElementSkeleton } from "./transform";
import { convertToExcalidrawElements } from "./transform";
import type { ExcalidrawArrowElement } from "../element/types";
import { point } from "../../math";
const opts = { regenerateIds: false };
@ -911,10 +912,7 @@ describe("Test Transform", () => {
x: 111.262,
y: 57,
strokeWidth: 2,
points: [
[0, 0],
[272.985, 0],
],
points: [point(0, 0), point(272.985, 0)],
label: {
text: "How are you?",
fontSize: 20,
@ -937,7 +935,7 @@ describe("Test Transform", () => {
x: 77.017,
y: 79,
strokeWidth: 2,
points: [[0, 0]],
points: [point(0, 0)],
label: {
text: "Friendship",
fontSize: 20,

13
packages/excalidraw/data/transform.ts
View File

@ -53,6 +53,7 @@ import { randomId } from "../random";
import { syncInvalidIndices } from "../fractionalIndex";
import { getLineHeight } from "../fonts";
import { isArrowElement } from "../element/typeChecks";
import { point, type LocalPoint } from "../../math";
export type ValidLinearElement = {
type: "arrow" | "line";
@ -417,7 +418,7 @@ const bindLinearElementToElement = (
const endPointIndex = linearElement.points.length - 1;
const delta = 0.5;
const newPoints = cloneJSON(linearElement.points) as [number, number][];
const newPoints = cloneJSON<readonly LocalPoint[]>(linearElement.points);
// left to right so shift the arrow towards right
if (
@ -535,10 +536,7 @@ export const convertToExcalidrawElements = (
excalidrawElement = newLinearElement({
width,
height,
points: [
[0, 0],
[width, height],
],
points: [point(0, 0), point(width, height)],
...element,
});
@ -551,10 +549,7 @@ export const convertToExcalidrawElements = (
width,
height,
endArrowhead: "arrow",
points: [
[0, 0],
[width, height],
],
points: [point(0, 0), point(width, height)],
...element,
type: "arrow",
});

308
packages/excalidraw/element/binding.ts
View File

@ -1,8 +1,8 @@
import * as GA from "../ga";
import * as GAPoint from "../gapoints";
import * as GADirection from "../gadirections";
import * as GALine from "../galines";
import * as GATransform from "../gatransforms";
import * as GA from "../../math/ga/ga";
import * as GAPoint from "../../math/ga/gapoints";
import * as GADirection from "../../math/ga/gadirections";
import * as GALine from "../../math/ga/galines";
import * as GATransform from "../../math/ga/gatransforms";
import type {
ExcalidrawBindableElement,
@ -10,7 +10,6 @@ import type {
ExcalidrawRectangleElement,
ExcalidrawDiamondElement,
ExcalidrawEllipseElement,
ExcalidrawFreeDrawElement,
ExcalidrawImageElement,
ExcalidrawFrameLikeElement,
ExcalidrawIframeLikeElement,
@ -26,11 +25,12 @@ import type {
ExcalidrawElbowArrowElement,
FixedPoint,
SceneElementsMap,
ExcalidrawRectanguloidElement,
} from "./types";
import type { Bounds } from "./bounds";
import { getElementAbsoluteCoords } from "./bounds";
import type { AppState, Point } from "../types";
import { getCenterForBounds, getElementAbsoluteCoords } from "./bounds";
import type { AppState } from "../types";
import { isPointOnShape } from "../../utils/collision";
import { getElementAtPosition } from "../scene";
import {
@ -51,17 +51,7 @@ import { LinearElementEditor } from "./linearElementEditor";
import { arrayToMap, tupleToCoors } from "../utils";
import { KEYS } from "../keys";
import { getBoundTextElement, handleBindTextResize } from "./textElement";
import { getElementShape } from "../shapes";
import {
aabbForElement,
clamp,
distanceSq2d,
getCenterForBounds,
getCenterForElement,
pointInsideBounds,
pointToVector,
rotatePoint,
} from "../math";
import { aabbForElement, getElementShape, pointInsideBounds } from "../shapes";
import {
compareHeading,
HEADING_DOWN,
@ -72,7 +62,18 @@ import {
vectorToHeading,
type Heading,
} from "./heading";
import { segmentIntersectRectangleElement } from "../../utils/geometry/geometry";
import type { LocalPoint, Radians } from "../../math";
import {
lineSegment,
point,
pointRotateRads,
type GlobalPoint,
vectorFromPoint,
pointFromPair,
pointDistanceSq,
clamp,
} from "../../math";
import { segmentIntersectRectangleElement } from "../../utils/geometry/shape";
export type SuggestedBinding =
| NonDeleted<ExcalidrawBindableElement>
@ -649,7 +650,7 @@ export const updateBoundElements = (
update,
): update is NonNullable<{
index: number;
point: Point;
point: LocalPoint;
isDragging?: boolean;
}> => update !== null,
);
@ -695,14 +696,14 @@ const getSimultaneouslyUpdatedElementIds = (
};
export const getHeadingForElbowArrowSnap = (
point: Readonly<Point>,
otherPoint: Readonly<Point>,
p: Readonly<GlobalPoint>,
otherPoint: Readonly<GlobalPoint>,
bindableElement: ExcalidrawBindableElement | undefined | null,
aabb: Bounds | undefined | null,
elementsMap: ElementsMap,
origPoint: Point,
origPoint: GlobalPoint,
): Heading => {
const otherPointHeading = vectorToHeading(pointToVector(otherPoint, point));
const otherPointHeading = vectorToHeading(vectorFromPoint(otherPoint, p));
if (!bindableElement || !aabb) {
return otherPointHeading;
@ -716,17 +717,23 @@ export const getHeadingForElbowArrowSnap = (
if (!distance) {
return vectorToHeading(
pointToVector(point, getCenterForElement(bindableElement)),
vectorFromPoint(
p,
point<GlobalPoint>(
bindableElement.x + bindableElement.width / 2,
bindableElement.y + bindableElement.height / 2,
),
),
);
}
const pointHeading = headingForPointFromElement(bindableElement, aabb, point);
const pointHeading = headingForPointFromElement(bindableElement, aabb, p);
return pointHeading;
};
const getDistanceForBinding = (
point: Readonly<Point>,
point: Readonly<GlobalPoint>,
bindableElement: ExcalidrawBindableElement,
elementsMap: ElementsMap,
) => {
@ -745,89 +752,87 @@ const getDistanceForBinding = (
};
export const bindPointToSnapToElementOutline = (
point: Readonly<Point>,
otherPoint: Readonly<Point>,
p: Readonly<GlobalPoint>,
otherPoint: Readonly<GlobalPoint>,
bindableElement: ExcalidrawBindableElement | undefined,
elementsMap: ElementsMap,
): Point => {
): GlobalPoint => {
const aabb = bindableElement && aabbForElement(bindableElement);
if (bindableElement && aabb) {
// TODO: Dirty hacks until tangents are properly calculated
const heading = headingForPointFromElement(bindableElement, aabb, point);
const heading = headingForPointFromElement(bindableElement, aabb, p);
const intersections = [
...intersectElementWithLine(
...(intersectElementWithLine(
bindableElement,
[point[0], point[1] - 2 * bindableElement.height],
[point[0], point[1] + 2 * bindableElement.height],
point(p[0], p[1] - 2 * bindableElement.height),
point(p[0], p[1] + 2 * bindableElement.height),
FIXED_BINDING_DISTANCE,
elementsMap,
),
...intersectElementWithLine(
) ?? []),
...(intersectElementWithLine(
bindableElement,
[point[0] - 2 * bindableElement.width, point[1]],
[point[0] + 2 * bindableElement.width, point[1]],
point(p[0] - 2 * bindableElement.width, p[1]),
point(p[0] + 2 * bindableElement.width, p[1]),
FIXED_BINDING_DISTANCE,
elementsMap,
),
) ?? []),
];
const isVertical =
compareHeading(heading, HEADING_LEFT) ||
compareHeading(heading, HEADING_RIGHT);
const dist = Math.abs(
distanceToBindableElement(bindableElement, point, elementsMap),
distanceToBindableElement(bindableElement, p, elementsMap),
);
const isInner = isVertical
? dist < bindableElement.width * -0.1
: dist < bindableElement.height * -0.1;
intersections.sort(
(a, b) => distanceSq2d(a, point) - distanceSq2d(b, point),
);
intersections.sort((a, b) => pointDistanceSq(a, p) - pointDistanceSq(b, p));
return isInner
? headingToMidBindPoint(otherPoint, bindableElement, aabb)
: intersections.filter((i) =>
isVertical
? Math.abs(point[1] - i[1]) < 0.1
: Math.abs(point[0] - i[0]) < 0.1,
? Math.abs(p[1] - i[1]) < 0.1
: Math.abs(p[0] - i[0]) < 0.1,
)[0] ?? point;
}
return point;
return p;
};
const headingToMidBindPoint = (
point: Point,
p: GlobalPoint,
bindableElement: ExcalidrawBindableElement,
aabb: Bounds,
): Point => {
): GlobalPoint => {
const center = getCenterForBounds(aabb);
const heading = vectorToHeading(pointToVector(point, center));
const heading = vectorToHeading(vectorFromPoint(p, center));
switch (true) {
case compareHeading(heading, HEADING_UP):
return rotatePoint(
[(aabb[0] + aabb[2]) / 2 + 0.1, aabb[1]],
return pointRotateRads(
point((aabb[0] + aabb[2]) / 2 + 0.1, aabb[1]),
center,
bindableElement.angle,
);
case compareHeading(heading, HEADING_RIGHT):
return rotatePoint(
[aabb[2], (aabb[1] + aabb[3]) / 2 + 0.1],
return pointRotateRads(
point(aabb[2], (aabb[1] + aabb[3]) / 2 + 0.1),
center,
bindableElement.angle,
);
case compareHeading(heading, HEADING_DOWN):
return rotatePoint(
[(aabb[0] + aabb[2]) / 2 - 0.1, aabb[3]],
return pointRotateRads(
point((aabb[0] + aabb[2]) / 2 - 0.1, aabb[3]),
center,
bindableElement.angle,
);
default:
return rotatePoint(
[aabb[0], (aabb[1] + aabb[3]) / 2 - 0.1],
return pointRotateRads(
point(aabb[0], (aabb[1] + aabb[3]) / 2 - 0.1),
center,
bindableElement.angle,
);
@ -836,22 +841,25 @@ const headingToMidBindPoint = (
export const avoidRectangularCorner = (
element: ExcalidrawBindableElement,
p: Point,
): Point => {
const center = getCenterForElement(element);
const nonRotatedPoint = rotatePoint(p, center, -element.angle);
p: GlobalPoint,
): GlobalPoint => {
const center = point<GlobalPoint>(
element.x + element.width / 2,
element.y + element.height / 2,
);
const nonRotatedPoint = pointRotateRads(p, center, -element.angle as Radians);
if (nonRotatedPoint[0] < element.x && nonRotatedPoint[1] < element.y) {
// Top left
if (nonRotatedPoint[1] - element.y > -FIXED_BINDING_DISTANCE) {
return rotatePoint(
[element.x - FIXED_BINDING_DISTANCE, element.y],
return pointRotateRads<GlobalPoint>(
point(element.x - FIXED_BINDING_DISTANCE, element.y),
center,
element.angle,
);
}
return rotatePoint(
[element.x, element.y - FIXED_BINDING_DISTANCE],
return pointRotateRads(
point(element.x, element.y - FIXED_BINDING_DISTANCE),
center,
element.angle,
);
@ -861,14 +869,14 @@ export const avoidRectangularCorner = (
) {
// Bottom left
if (nonRotatedPoint[0] - element.x > -FIXED_BINDING_DISTANCE) {
return rotatePoint(
[element.x, element.y + element.height + FIXED_BINDING_DISTANCE],
return pointRotateRads(
point(element.x, element.y + element.height + FIXED_BINDING_DISTANCE),
center,
element.angle,
);
}
return rotatePoint(
[element.x - FIXED_BINDING_DISTANCE, element.y + element.height],
return pointRotateRads(
point(element.x - FIXED_BINDING_DISTANCE, element.y + element.height),
center,
element.angle,
);
@ -881,20 +889,20 @@ export const avoidRectangularCorner = (
nonRotatedPoint[0] - element.x <
element.width + FIXED_BINDING_DISTANCE
) {
return rotatePoint(
[
return pointRotateRads(
point(
element.x + element.width,
element.y + element.height + FIXED_BINDING_DISTANCE,
],
),
center,
element.angle,
);
}
return rotatePoint(
[
return pointRotateRads(
point(
element.x + element.width + FIXED_BINDING_DISTANCE,
element.y + element.height,
],
),
center,
element.angle,
);
@ -907,14 +915,14 @@ export const avoidRectangularCorner = (
nonRotatedPoint[0] - element.x <
element.width + FIXED_BINDING_DISTANCE
) {
return rotatePoint(
[element.x + element.width, element.y - FIXED_BINDING_DISTANCE],
return pointRotateRads(
point(element.x + element.width, element.y - FIXED_BINDING_DISTANCE),
center,
element.angle,
);
}
return rotatePoint(
[element.x + element.width + FIXED_BINDING_DISTANCE, element.y],
return pointRotateRads(
point(element.x + element.width + FIXED_BINDING_DISTANCE, element.y),
center,
element.angle,
);
@ -925,12 +933,12 @@ export const avoidRectangularCorner = (
export const snapToMid = (
element: ExcalidrawBindableElement,
p: Point,
p: GlobalPoint,
tolerance: number = 0.05,
): Point => {
): GlobalPoint => {
const { x, y, width, height, angle } = element;
const center = [x + width / 2 - 0.1, y + height / 2 - 0.1] as Point;
const nonRotated = rotatePoint(p, center, -angle);
const center = point<GlobalPoint>(x + width / 2 - 0.1, y + height / 2 - 0.1);
const nonRotated = pointRotateRads(p, center, -angle as Radians);
// snap-to-center point is adaptive to element size, but we don't want to go
// above and below certain px distance
@ -943,22 +951,30 @@ export const snapToMid = (
nonRotated[1] < center[1] + verticalThrehsold
) {
// LEFT
return rotatePoint([x - FIXED_BINDING_DISTANCE, center[1]], center, angle);
return pointRotateRads(
point(x - FIXED_BINDING_DISTANCE, center[1]),
center,
angle,
);
} else if (
nonRotated[1] <= y + height / 2 &&
nonRotated[0] > center[0] - horizontalThrehsold &&
nonRotated[0] < center[0] + horizontalThrehsold
) {
// TOP
return rotatePoint([center[0], y - FIXED_BINDING_DISTANCE], center, angle);
return pointRotateRads(
point(center[0], y - FIXED_BINDING_DISTANCE),
center,
angle,
);
} else if (
nonRotated[0] >= x + width / 2 &&
nonRotated[1] > center[1] - verticalThrehsold &&
nonRotated[1] < center[1] + verticalThrehsold
) {
// RIGHT
return rotatePoint(
[x + width + FIXED_BINDING_DISTANCE, center[1]],
return pointRotateRads(
point(x + width + FIXED_BINDING_DISTANCE, center[1]),
center,
angle,
);
@ -968,8 +984,8 @@ export const snapToMid = (
nonRotated[0] < center[0] + horizontalThrehsold
) {
// DOWN
return rotatePoint(
[center[0], y + height + FIXED_BINDING_DISTANCE],
return pointRotateRads(
point(center[0], y + height + FIXED_BINDING_DISTANCE),
center,
angle,
);
@ -984,7 +1000,7 @@ const updateBoundPoint = (
binding: PointBinding | null | undefined,
bindableElement: ExcalidrawBindableElement,
elementsMap: ElementsMap,
): Point | null => {
): LocalPoint | null => {
if (
binding == null ||
// We only need to update the other end if this is a 2 point line element
@ -1006,15 +1022,15 @@ const updateBoundPoint = (
startOrEnd === "startBinding" ? "start" : "end",
elementsMap,
).fixedPoint;
const globalMidPoint = [
const globalMidPoint = point<GlobalPoint>(
bindableElement.x + bindableElement.width / 2,
bindableElement.y + bindableElement.height / 2,
] as Point;
const global = [
);
const global = point<GlobalPoint>(
bindableElement.x + fixedPoint[0] * bindableElement.width,
bindableElement.y + fixedPoint[1] * bindableElement.height,
] as Point;
const rotatedGlobal = rotatePoint(
);
const rotatedGlobal = pointRotateRads(
global,
globalMidPoint,
bindableElement.angle,
@ -1040,7 +1056,7 @@ const updateBoundPoint = (
elementsMap,
);
let newEdgePoint: Point;
let newEdgePoint: GlobalPoint;
// The linear element was not originally pointing inside the bound shape,
// we can point directly at the focus point
@ -1054,7 +1070,7 @@ const updateBoundPoint = (
binding.gap,
elementsMap,
);
if (intersections.length === 0) {
if (!intersections || intersections.length === 0) {
// This should never happen, since focusPoint should always be
// inside the element, but just in case, bail out
newEdgePoint = focusPointAbsolute;
@ -1101,15 +1117,15 @@ export const calculateFixedPointForElbowArrowBinding = (
hoveredElement,
elementsMap,
);
const globalMidPoint = [
const globalMidPoint = point(
bounds[0] + (bounds[2] - bounds[0]) / 2,
bounds[1] + (bounds[3] - bounds[1]) / 2,
] as Point;
const nonRotatedSnappedGlobalPoint = rotatePoint(
);
const nonRotatedSnappedGlobalPoint = pointRotateRads(
snappedPoint,
globalMidPoint,
-hoveredElement.angle,
) as Point;
-hoveredElement.angle as Radians,
);
return {
fixedPoint: normalizeFixedPoint([
@ -1320,8 +1336,9 @@ export const bindingBorderTest = (
const threshold = maxBindingGap(element, element.width, element.height);
const shape = getElementShape(element, elementsMap);
return (
isPointOnShape([x, y], shape, threshold) ||
(fullShape === true && pointInsideBounds([x, y], aabbForElement(element)))
isPointOnShape(point(x, y), shape, threshold) ||
(fullShape === true &&
pointInsideBounds(point(x, y), aabbForElement(element)))
);
};
@ -1339,7 +1356,7 @@ export const maxBindingGap = (
export const distanceToBindableElement = (
element: ExcalidrawBindableElement,
point: Point,
point: GlobalPoint,
elementsMap: ElementsMap,
): number => {
switch (element.type) {
@ -1359,19 +1376,13 @@ export const distanceToBindableElement = (
};
const distanceToRectangle = (
element:
| ExcalidrawRectangleElement
| ExcalidrawTextElement
| ExcalidrawFreeDrawElement
| ExcalidrawImageElement
| ExcalidrawIframeLikeElement
| ExcalidrawFrameLikeElement,
point: Point,
element: ExcalidrawRectanguloidElement,
p: GlobalPoint,
elementsMap: ElementsMap,
): number => {
const [, pointRel, hwidth, hheight] = pointRelativeToElement(
element,
point,
p,
elementsMap,
);
return Math.max(
@ -1382,7 +1393,7 @@ const distanceToRectangle = (
const distanceToDiamond = (
element: ExcalidrawDiamondElement,
point: Point,
point: GlobalPoint,
elementsMap: ElementsMap,
): number => {
const [, pointRel, hwidth, hheight] = pointRelativeToElement(
@ -1396,7 +1407,7 @@ const distanceToDiamond = (
const distanceToEllipse = (
element: ExcalidrawEllipseElement,
point: Point,
point: GlobalPoint,
elementsMap: ElementsMap,
): number => {
const [pointRel, tangent] = ellipseParamsForTest(element, point, elementsMap);
@ -1405,7 +1416,7 @@ const distanceToEllipse = (
const ellipseParamsForTest = (
element: ExcalidrawEllipseElement,
point: Point,
point: GlobalPoint,
elementsMap: ElementsMap,
): [GA.Point, GA.Line] => {
const [, pointRel, hwidth, hheight] = pointRelativeToElement(
@ -1467,7 +1478,7 @@ const ellipseParamsForTest = (
// so we only need to perform hit tests for the positive quadrant.
const pointRelativeToElement = (
element: ExcalidrawElement,
pointTuple: Point,
pointTuple: GlobalPoint,
elementsMap: ElementsMap,
): [GA.Point, GA.Point, number, number] => {
const point = GAPoint.from(pointTuple);
@ -1516,9 +1527,9 @@ const coordsCenter = (
const determineFocusDistance = (
element: ExcalidrawBindableElement,
// Point on the line, in absolute coordinates
a: Point,
a: GlobalPoint,
// Another point on the line, in absolute coordinates (closer to element)
b: Point,
b: GlobalPoint,
elementsMap: ElementsMap,
): number => {
const relateToCenter = relativizationToElementCenter(element, elementsMap);
@ -1559,13 +1570,13 @@ const determineFocusPoint = (
// The oriented, relative distance from the center of `element` of the
// returned focusPoint
focus: number,
adjecentPoint: Point,
adjecentPoint: GlobalPoint,
elementsMap: ElementsMap,
): Point => {
): GlobalPoint => {
if (focus === 0) {
const [x1, y1, x2, y2] = getElementAbsoluteCoords(element, elementsMap);
const center = coordsCenter(x1, y1, x2, y2);
return GAPoint.toTuple(center);
return pointFromPair(GAPoint.toTuple(center));
}
const relateToCenter = relativizationToElementCenter(element, elementsMap);
const adjecentPointRel = GATransform.apply(
@ -1589,7 +1600,9 @@ const determineFocusPoint = (
point = findFocusPointForEllipse(element, focus, adjecentPointRel);
break;
}
return GAPoint.toTuple(GATransform.apply(reverseRelateToCenter, point));
return pointFromPair(
GAPoint.toTuple(GATransform.apply(reverseRelateToCenter, point)),
);
};
// Returns 2 or 0 intersection points between line going through `a` and `b`
@ -1597,15 +1610,15 @@ const determineFocusPoint = (
const intersectElementWithLine = (
element: ExcalidrawBindableElement,
// Point on the line, in absolute coordinates
a: Point,
a: GlobalPoint,
// Another point on the line, in absolute coordinates
b: Point,
b: GlobalPoint,
// If given, the element is inflated by this value
gap: number = 0,
elementsMap: ElementsMap,
): Point[] => {
): GlobalPoint[] | undefined => {
if (isRectangularElement(element)) {
return segmentIntersectRectangleElement(element, [a, b], gap);
return segmentIntersectRectangleElement(element, lineSegment(a, b), gap);
}
const relateToCenter = relativizationToElementCenter(element, elementsMap);
@ -1619,8 +1632,14 @@ const intersectElementWithLine = (
aRel,
gap,
);
return intersections.map((point) =>
return intersections.map(
(point) =>
pointFromPair(
GAPoint.toTuple(GATransform.apply(reverseRelateToCenter, point)),
),
// pointFromArray(
// ,
// ),
);
};
@ -2173,12 +2192,18 @@ export class BindableElement {
export const getGlobalFixedPointForBindableElement = (
fixedPointRatio: [number, number],
element: ExcalidrawBindableElement,
) => {
): GlobalPoint => {
const [fixedX, fixedY] = normalizeFixedPoint(fixedPointRatio);
return rotatePoint(
[element.x + element.width * fixedX, element.y + element.height * fixedY],
getCenterForElement(element),
return pointRotateRads(
point(
element.x + element.width * fixedX,
element.y + element.height * fixedY,
),
point<GlobalPoint>(
element.x + element.width / 2,
element.y + element.height / 2,
),
element.angle,
);
};
@ -2186,7 +2211,7 @@ export const getGlobalFixedPointForBindableElement = (
const getGlobalFixedPoints = (
arrow: ExcalidrawElbowArrowElement,
elementsMap: ElementsMap,
) => {
): [GlobalPoint, GlobalPoint] => {
const startElement =
arrow.startBinding &&
(elementsMap.get(arrow.startBinding.elementId) as
@ -2197,23 +2222,26 @@ const getGlobalFixedPoints = (
(elementsMap.get(arrow.endBinding.elementId) as
| ExcalidrawBindableElement
| undefined);
const startPoint: Point =
const startPoint =
startElement && arrow.startBinding
? getGlobalFixedPointForBindableElement(
arrow.startBinding.fixedPoint,
startElement as ExcalidrawBindableElement,
)
: [arrow.x + arrow.points[0][0], arrow.y + arrow.points[0][1]];
const endPoint: Point =
: point<GlobalPoint>(
arrow.x + arrow.points[0][0],
arrow.y + arrow.points[0][1],
);
const endPoint =
endElement && arrow.endBinding
? getGlobalFixedPointForBindableElement(
arrow.endBinding.fixedPoint,
endElement as ExcalidrawBindableElement,
)
: [
: point<GlobalPoint>(
arrow.x + arrow.points[arrow.points.length - 1][0],
arrow.y + arrow.points[arrow.points.length - 1][1],
];
);
return [startPoint, endPoint];
};

8
packages/excalidraw/element/bounds.test.ts
View File

@ -1,3 +1,5 @@
import type { LocalPoint } from "../../math";
import { point } from "../../math";
import { ROUNDNESS } from "../constants";
import { arrayToMap } from "../utils";
import { getElementAbsoluteCoords, getElementBounds } from "./bounds";
@ -123,9 +125,9 @@ describe("getElementBounds", () => {
a: 0.6447741904932416,
}),
points: [
[0, 0] as [number, number],
[67.33984375, 92.48828125] as [number, number],
[-102.7890625, 52.15625] as [number, number],
point<LocalPoint>(0, 0),
point<LocalPoint>(67.33984375, 92.48828125),
point<LocalPoint>(-102.7890625, 52.15625),
],
} as ExcalidrawLinearElement;

278
packages/excalidraw/element/bounds.ts
View File

@ -7,10 +7,10 @@ import type {
ExcalidrawTextElementWithContainer,
ElementsMap,
} from "./types";
import { distance2d, rotate, rotatePoint } from "../math";
import rough from "roughjs/bin/rough";
import type { Point as RoughPoint } from "roughjs/bin/geometry";
import type { Drawable, Op } from "roughjs/bin/core";
import type { AppState, Point } from "../types";
import type { AppState } from "../types";
import { generateRoughOptions } from "../scene/Shape";
import {
isArrowElement,
@ -22,9 +22,24 @@ import {
import { rescalePoints } from "../points";
import { getBoundTextElement, getContainerElement } from "./textElement";
import { LinearElementEditor } from "./linearElementEditor";
import type { Mutable } from "../utility-types";
import { ShapeCache } from "../scene/ShapeCache";
import { arrayToMap } from "../utils";
import { arrayToMap, invariant } from "../utils";
import type {
Degrees,
GlobalPoint,
LineSegment,
LocalPoint,
Radians,
} from "../../math";
import {
degreesToRadians,
lineSegment,
point,
pointDistance,
pointFromArray,
pointRotateRads,
} from "../../math";
import type { Mutable } from "../utility-types";
export type RectangleBox = {
x: number;
@ -97,7 +112,11 @@ export class ElementBounds {
if (isFreeDrawElement(element)) {
const [minX, minY, maxX, maxY] = getBoundsFromPoints(
element.points.map(([x, y]) =>
rotate(x, y, cx - element.x, cy - element.y, element.angle),
pointRotateRads(
point(x, y),
point(cx - element.x, cy - element.y),
element.angle,
),
),
);
@ -110,10 +129,26 @@ export class ElementBounds {
} else if (isLinearElement(element)) {
bounds = getLinearElementRotatedBounds(element, cx, cy, elementsMap);
} else if (element.type === "diamond") {
const [x11, y11] = rotate(cx, y1, cx, cy, element.angle);
const [x12, y12] = rotate(cx, y2, cx, cy, element.angle);
const [x22, y22] = rotate(x1, cy, cx, cy, element.angle);
const [x21, y21] = rotate(x2, cy, cx, cy, element.angle);
const [x11, y11] = pointRotateRads(
point(cx, y1),
point(cx, cy),
element.angle,
);
const [x12, y12] = pointRotateRads(
point(cx, y2),
point(cx, cy),
element.angle,
);
const [x22, y22] = pointRotateRads(
point(x1, cy),
point(cx, cy),
element.angle,
);
const [x21, y21] = pointRotateRads(
point(x2, cy),
point(cx, cy),
element.angle,
);
const minX = Math.min(x11, x12, x22, x21);
const minY = Math.min(y11, y12, y22, y21);
const maxX = Math.max(x11, x12, x22, x21);
@ -128,10 +163,26 @@ export class ElementBounds {
const hh = Math.hypot(h * cos, w * sin);
bounds = [cx - ww, cy - hh, cx + ww, cy + hh];
} else {
const [x11, y11] = rotate(x1, y1, cx, cy, element.angle);
const [x12, y12] = rotate(x1, y2, cx, cy, element.angle);
const [x22, y22] = rotate(x2, y2, cx, cy, element.angle);
const [x21, y21] = rotate(x2, y1, cx, cy, element.angle);
const [x11, y11] = pointRotateRads(
point(x1, y1),
point(cx, cy),
element.angle,
);
const [x12, y12] = pointRotateRads(
point(x1, y2),
point(cx, cy),
element.angle,
);
const [x22, y22] = pointRotateRads(
point(x2, y2),
point(cx, cy),
element.angle,
);
const [x21, y21] = pointRotateRads(
point(x2, y1),
point(cx, cy),
element.angle,
);
const minX = Math.min(x11, x12, x22, x21);
const minY = Math.min(y11, y12, y22, y21);
const maxX = Math.max(x11, x12, x22, x21);
@ -165,18 +216,18 @@ export const getElementAbsoluteCoords = (
? getContainerElement(element, elementsMap)
: null;
if (isArrowElement(container)) {
const coords = LinearElementEditor.getBoundTextElementPosition(
const { x, y } = LinearElementEditor.getBoundTextElementPosition(
container,
element as ExcalidrawTextElementWithContainer,
elementsMap,
);
return [
coords.x,
coords.y,
coords.x + element.width,
coords.y + element.height,
coords.x + element.width / 2,
coords.y + element.height / 2,
x,
y,
x + element.width,
y + element.height,
x + element.width / 2,
y + element.height / 2,
];
}
}
@ -198,38 +249,40 @@ export const getElementAbsoluteCoords = (
export const getElementLineSegments = (
element: ExcalidrawElement,
elementsMap: ElementsMap,
): [Point, Point][] => {
): LineSegment<GlobalPoint>[] => {
const [x1, y1, x2, y2, cx, cy] = getElementAbsoluteCoords(
element,
elementsMap,
);
const center: Point = [cx, cy];
const center: GlobalPoint = point(cx, cy);
if (isLinearElement(element) || isFreeDrawElement(element)) {
const segments: [Point, Point][] = [];
const segments: LineSegment<GlobalPoint>[] = [];
let i = 0;
while (i < element.points.length - 1) {
segments.push([
rotatePoint(
[
segments.push(
lineSegment(
pointRotateRads(
point(
element.points[i][0] + element.x,
element.points[i][1] + element.y,
] as Point,
),
center,
element.angle,
),
rotatePoint(
[
pointRotateRads(
point(
element.points[i + 1][0] + element.x,
element.points[i + 1][1] + element.y,
] as Point,
),
center,
element.angle,
),
]);
),
);
i++;
}
@ -246,40 +299,40 @@ export const getElementLineSegments = (
[cx, y2],
[x1, cy],
[x2, cy],
] as Point[]
).map((point) => rotatePoint(point, center, element.angle));
] as GlobalPoint[]
).map((point) => pointRotateRads(point, center, element.angle));
if (element.type === "diamond") {
return [
[n, w],
[n, e],
[s, w],
[s, e],
lineSegment(n, w),
lineSegment(n, e),
lineSegment(s, w),
lineSegment(s, e),
];
}
if (element.type === "ellipse") {
return [
[n, w],
[n, e],
[s, w],
[s, e],
[n, w],
[n, e],
[s, w],
[s, e],
lineSegment(n, w),
lineSegment(n, e),
lineSegment(s, w),
lineSegment(s, e),
lineSegment(n, w),
lineSegment(n, e),
lineSegment(s, w),
lineSegment(s, e),
];
}
return [
[nw, ne],
[sw, se],
[nw, sw],
[ne, se],
[nw, e],
[sw, e],
[ne, w],
[se, w],
lineSegment(nw, ne),
lineSegment(sw, se),
lineSegment(nw, sw),
lineSegment(ne, se),
lineSegment(nw, e),
lineSegment(sw, e),
lineSegment(ne, w),
lineSegment(se, w),
];
};
@ -386,10 +439,10 @@ const solveQuadratic = (
};
const getCubicBezierCurveBound = (
p0: Point,
p1: Point,
p2: Point,
p3: Point,
p0: GlobalPoint,
p1: GlobalPoint,
p2: GlobalPoint,
p3: GlobalPoint,
): Bounds => {
const solX = solveQuadratic(p0[0], p1[0], p2[0], p3[0]);
const solY = solveQuadratic(p0[1], p1[1], p2[1], p3[1]);
@ -415,9 +468,9 @@ const getCubicBezierCurveBound = (
export const getMinMaxXYFromCurvePathOps = (
ops: Op[],
transformXY?: (x: number, y: number) => [number, number],
transformXY?: (p: GlobalPoint) => GlobalPoint,
): Bounds => {
let currentP: Point = [0, 0];
let currentP: GlobalPoint = point(0, 0);
const { minX, minY, maxX, maxY } = ops.reduce(
(limits, { op, data }) => {
@ -425,19 +478,21 @@ export const getMinMaxXYFromCurvePathOps = (
// move, bcurveTo, lineTo, and curveTo
if (op === "move") {
// change starting point
currentP = data as unknown as Point;
const p: GlobalPoint | undefined = pointFromArray(data);
invariant(p != null, "Op data is not a point");
currentP = p;
// move operation does not draw anything; so, it always
// returns false
} else if (op === "bcurveTo") {
const _p1 = [data[0], data[1]] as Point;
const _p2 = [data[2], data[3]] as Point;
const _p3 = [data[4], data[5]] as Point;
const _p1 = point<GlobalPoint>(data[0], data[1]);
const _p2 = point<GlobalPoint>(data[2], data[3]);
const _p3 = point<GlobalPoint>(data[4], data[5]);
const p1 = transformXY ? transformXY(..._p1) : _p1;
const p2 = transformXY ? transformXY(..._p2) : _p2;
const p3 = transformXY ? transformXY(..._p3) : _p3;
const p1 = transformXY ? transformXY(_p1) : _p1;
const p2 = transformXY ? transformXY(_p2) : _p2;
const p3 = transformXY ? transformXY(_p3) : _p3;
const p0 = transformXY ? transformXY(...currentP) : currentP;
const p0 = transformXY ? transformXY(currentP) : currentP;
currentP = _p3;
const [minX, minY, maxX, maxY] = getCubicBezierCurveBound(
@ -507,14 +562,14 @@ export const getArrowheadSize = (arrowhead: Arrowhead): number => {
};
/** @returns number in degrees */
export const getArrowheadAngle = (arrowhead: Arrowhead): number => {
export const getArrowheadAngle = (arrowhead: Arrowhead): Degrees => {
switch (arrowhead) {
case "bar":
return 90;
return 90 as Degrees;
case "arrow":
return 20;
return 20 as Degrees;
default:
return 25;
return 25 as Degrees;
}
};
@ -533,19 +588,24 @@ export const getArrowheadPoints = (
const index = position === "start" ? 1 : ops.length - 1;
const data = ops[index].data;
const p3 = [data[4], data[5]] as Point;
const p2 = [data[2], data[3]] as Point;
const p1 = [data[0], data[1]] as Point;
invariant(data.length === 6, "Op data length is not 6");
const p3 = point(data[4], data[5]);
const p2 = point(data[2], data[3]);
const p1 = point(data[0], data[1]);
// We need to find p0 of the bezier curve.
// It is typically the last point of the previous
// curve; it can also be the position of moveTo operation.
const prevOp = ops[index - 1];
let p0: Point = [0, 0];
let p0 = point(0, 0);
if (prevOp.op === "move") {
p0 = prevOp.data as unknown as Point;
const p = pointFromArray(prevOp.data);
invariant(p != null, "Op data is not a point");
p0 = p;
} else if (prevOp.op === "bcurveTo") {
p0 = [prevOp.data[4], prevOp.data[5]];
p0 = point(prevOp.data[4], prevOp.data[5]);
}
// B(t) = p0 * (1-t)^3 + 3p1 * t * (1-t)^2 + 3p2 * t^2 * (1-t) + p3 * t^3
@ -610,8 +670,16 @@ export const getArrowheadPoints = (
const angle = getArrowheadAngle(arrowhead);
// Return points
const [x3, y3] = rotate(xs, ys, x2, y2, (-angle * Math.PI) / 180);
const [x4, y4] = rotate(xs, ys, x2, y2, (angle * Math.PI) / 180);
const [x3, y3] = pointRotateRads(
point(xs, ys),
point(x2, y2),
((-angle * Math.PI) / 180) as Radians,
);
const [x4, y4] = pointRotateRads(
point(xs, ys),
point(x2, y2),
degreesToRadians(angle),
);
if (arrowhead === "diamond" || arrowhead === "diamond_outline") {
// point opposite to the arrowhead point
@ -621,12 +689,10 @@ export const getArrowheadPoints = (
if (position === "start") {
const [px, py] = element.points.length > 1 ? element.points[1] : [0, 0];
[ox, oy] = rotate(
x2 + minSize * 2,
y2,
x2,
y2,
Math.atan2(py - y2, px - x2),
[ox, oy] = pointRotateRads(
point(x2 + minSize * 2, y2),
point(x2, y2),
Math.atan2(py - y2, px - x2) as Radians,
);
} else {
const [px, py] =
@ -634,12 +700,10 @@ export const getArrowheadPoints = (
? element.points[element.points.length - 2]
: [0, 0];
[ox, oy] = rotate(
x2 - minSize * 2,
y2,
x2,
y2,
Math.atan2(y2 - py, x2 - px),
[ox, oy] = pointRotateRads(
point(x2 - minSize * 2, y2),
point(x2, y2),
Math.atan2(y2 - py, x2 - px) as Radians,
);
}
@ -665,7 +729,10 @@ const generateLinearElementShape = (
return "linearPath";
})();
return generator[method](element.points as Mutable<Point>[], options);
return generator[method](
element.points as Mutable<LocalPoint>[] as RoughPoint[],
options,
);
};
const getLinearElementRotatedBounds = (
@ -678,11 +745,9 @@ const getLinearElementRotatedBounds = (
if (element.points.length < 2) {
const [pointX, pointY] = element.points[0];
const [x, y] = rotate(
element.x + pointX,
element.y + pointY,
cx,
cy,
const [x, y] = pointRotateRads(
point(element.x + pointX, element.y + pointY),
point(cx, cy),
element.angle,
);
@ -708,8 +773,12 @@ const getLinearElementRotatedBounds = (
const cachedShape = ShapeCache.get(element)?.[0];
const shape = cachedShape ?? generateLinearElementShape(element);
const ops = getCurvePathOps(shape);
const transformXY = (x: number, y: number) =>
rotate(element.x + x, element.y + y, cx, cy, element.angle);
const transformXY = ([x, y]: GlobalPoint) =>
pointRotateRads<GlobalPoint>(
point(element.x + x, element.y + y),
point(cx, cy),
element.angle,
);
const res = getMinMaxXYFromCurvePathOps(ops, transformXY);
let coords: Bounds = [res[0], res[1], res[2], res[3]];
if (boundTextElement) {
@ -861,7 +930,10 @@ export const getClosestElementBounds = (
const elementsMap = arrayToMap(elements);
elements.forEach((element) => {
const [x1, y1, x2, y2] = getElementBounds(element, elementsMap);
const distance = distance2d((x1 + x2) / 2, (y1 + y2) / 2, from.x, from.y);
const distance = pointDistance(
point((x1 + x2) / 2, (y1 + y2) / 2),
point(from.x, from.y),
);
if (distance < minDistance) {
minDistance = distance;
@ -916,3 +988,9 @@ export const getVisibleSceneBounds = ({
-scrollY + height / zoom.value,
];
};
export const getCenterForBounds = (bounds: Bounds): GlobalPoint =>
point(
bounds[0] + (bounds[2] - bounds[0]) / 2,
bounds[1] + (bounds[3] - bounds[1]) / 2,
);

40
packages/excalidraw/element/collision.ts
View File

@ -1,14 +1,11 @@
import { isPathALoop, isPointWithinBounds } from "../math";
import type {
ElementsMap,
ExcalidrawElement,
ExcalidrawRectangleElement,
} from "./types";
import { getElementBounds } from "./bounds";
import type { FrameNameBounds } from "../types";
import type { Polygon, GeometricShape } from "../../utils/geometry/shape";
import type { GeometricShape } from "../../utils/geometry/shape";
import { getPolygonShape } from "../../utils/geometry/shape";
import { isPointInShape, isPointOnShape } from "../../utils/collision";
import { isTransparent } from "../utils";
@ -18,7 +15,9 @@ import {
isImageElement,
isTextElement,
} from "./typeChecks";
import { getBoundTextShape } from "../shapes";
import { getBoundTextShape, isPathALoop } from "../shapes";
import type { GlobalPoint, LocalPoint, Polygon } from "../../math";
import { isPointWithinBounds, point } from "../../math";
export const shouldTestInside = (element: ExcalidrawElement) => {
if (element.type === "arrow") {
@ -42,35 +41,36 @@ export const shouldTestInside = (element: ExcalidrawElement) => {
return isDraggableFromInside || isImageElement(element);
};
export type HitTestArgs = {
export type HitTestArgs<Point extends GlobalPoint | LocalPoint> = {
x: number;
y: number;
element: ExcalidrawElement;
shape: GeometricShape;
shape: GeometricShape<Point>;
threshold?: number;
frameNameBound?: FrameNameBounds | null;
};
export const hitElementItself = ({
export const hitElementItself = <Point extends GlobalPoint | LocalPoint>({
x,
y,
element,
shape,
threshold = 10,
frameNameBound = null,
}: HitTestArgs) => {
}: HitTestArgs<Point>) => {
let hit = shouldTestInside(element)
? // Since `inShape` tests STRICTLY againt the insides of a shape
// we would need `onShape` as well to include the "borders"
isPointInShape([x, y], shape) || isPointOnShape([x, y], shape, threshold)
: isPointOnShape([x, y], shape, threshold);
isPointInShape(point(x, y), shape) ||
isPointOnShape(point(x, y), shape, threshold)
: isPointOnShape(point(x, y), shape, threshold);
// hit test against a frame's name
if (!hit && frameNameBound) {
hit = isPointInShape([x, y], {
hit = isPointInShape(point(x, y), {
type: "polygon",
data: getPolygonShape(frameNameBound as ExcalidrawRectangleElement)
.data as Polygon,
.data as Polygon<Point>,
});
}
@ -89,11 +89,13 @@ export const hitElementBoundingBox = (
y1 -= tolerance;
x2 += tolerance;
y2 += tolerance;
return isPointWithinBounds([x1, y1], [x, y], [x2, y2]);
return isPointWithinBounds(point(x1, y1), point(x, y), point(x2, y2));
};
export const hitElementBoundingBoxOnly = (
hitArgs: HitTestArgs,
export const hitElementBoundingBoxOnly = <
Point extends GlobalPoint | LocalPoint,
>(
hitArgs: HitTestArgs<Point>,
elementsMap: ElementsMap,
) => {
return (
@ -108,10 +110,10 @@ export const hitElementBoundingBoxOnly = (
);
};
export const hitElementBoundText = (
export const hitElementBoundText = <Point extends GlobalPoint | LocalPoint>(
x: number,
y: number,
textShape: GeometricShape | null,
textShape: GeometricShape<Point> | null,
): boolean => {
return !!textShape && isPointInShape([x, y], textShape);
return !!textShape && isPointInShape(point(x, y), textShape);
};

2
packages/excalidraw/element/dragElements.ts
View File

@ -11,7 +11,6 @@ import type {
PointerDownState,
} from "../types";
import { getBoundTextElement, getMinTextElementWidth } from "./textElement";
import { getGridPoint } from "../math";
import type Scene from "../scene/Scene";
import {
isArrowElement,
@ -21,6 +20,7 @@ import {
} from "./typeChecks";
import { getFontString } from "../utils";
import { TEXT_AUTOWRAP_THRESHOLD } from "../constants";
import { getGridPoint } from "../snapping";
export const dragSelectedElements = (
pointerDownState: PointerDownState,

17
packages/excalidraw/element/flowchart.ts
View File

@ -10,7 +10,6 @@ import {
import { bindLinearElement } from "./binding";
import { LinearElementEditor } from "./linearElementEditor";
import { newArrowElement, newElement } from "./newElement";
import { aabbForElement } from "../math";
import type {
ElementsMap,
ExcalidrawBindableElement,
@ -20,7 +19,7 @@ import type {
OrderedExcalidrawElement,
} from "./types";
import { KEYS } from "../keys";
import type { AppState, PendingExcalidrawElements, Point } from "../types";
import type { AppState, PendingExcalidrawElements } from "../types";
import { mutateElement } from "./mutateElement";
import { elementOverlapsWithFrame, elementsAreInFrameBounds } from "../frame";
import {
@ -30,6 +29,8 @@ import {
isFlowchartNodeElement,
} from "./typeChecks";
import { invariant } from "../utils";
import { point, type LocalPoint } from "../../math";
import { aabbForElement } from "../shapes";
type LinkDirection = "up" | "right" | "down" | "left";
@ -81,13 +82,14 @@ const getNodeRelatives = (
"not an ExcalidrawBindableElement",
);
const edgePoint: Point =
type === "predecessors" ? el.points[el.points.length - 1] : [0, 0];
const edgePoint = (
type === "predecessors" ? el.points[el.points.length - 1] : [0, 0]
) as Readonly<LocalPoint>;
const heading = headingForPointFromElement(node, aabbForElement(node), [
edgePoint[0] + el.x,
edgePoint[1] + el.y,
]);
] as Readonly<LocalPoint>);
acc.push({
relative,
@ -419,10 +421,7 @@ const createBindingArrow = (
strokeColor: appState.currentItemStrokeColor,
strokeStyle: appState.currentItemStrokeStyle,
strokeWidth: appState.currentItemStrokeWidth,
points: [
[0, 0],
[endX, endY],
],
points: [point(0, 0), point(endX, endY)],
elbowed: true,
});

124
packages/excalidraw/element/heading.ts
View File

@ -1,12 +1,18 @@
import { lineAngle } from "../../utils/geometry/geometry";
import type { Point, Vector } from "../../utils/geometry/shape";
import type {
LocalPoint,
GlobalPoint,
Triangle,
Vector,
Radians,
} from "../../math";
import {
getCenterForBounds,
PointInTriangle,
rotatePoint,
scalePointFromOrigin,
} from "../math";
import type { Bounds } from "./bounds";
point,
pointRotateRads,
pointScaleFromOrigin,
radiansToDegrees,
triangleIncludesPoint,
} from "../../math";
import { getCenterForBounds, type Bounds } from "./bounds";
import type { ExcalidrawBindableElement } from "./types";
export const HEADING_RIGHT = [1, 0] as Heading;
@ -15,8 +21,13 @@ export const HEADING_LEFT = [-1, 0] as Heading;
export const HEADING_UP = [0, -1] as Heading;
export type Heading = [1, 0] | [0, 1] | [-1, 0] | [0, -1];
export const headingForDiamond = (a: Point, b: Point) => {
const angle = lineAngle([a, b]);
export const headingForDiamond = <Point extends GlobalPoint | LocalPoint>(
a: Point,
b: Point,
) => {
const angle = radiansToDegrees(
Math.atan2(b[1] - a[1], b[0] - a[0]) as Radians,
);
if (angle >= 315 || angle < 45) {
return HEADING_UP;
} else if (angle >= 45 && angle < 135) {
@ -47,56 +58,58 @@ export const compareHeading = (a: Heading, b: Heading) =>
// Gets the heading for the point by creating a bounding box around the rotated
// close fitting bounding box, then creating 4 search cones around the center of
// the external bbox.
export const headingForPointFromElement = (
export const headingForPointFromElement = <
Point extends GlobalPoint | LocalPoint,
>(
element: Readonly<ExcalidrawBindableElement>,
aabb: Readonly<Bounds>,
point: Readonly<Point>,
p: Readonly<LocalPoint | GlobalPoint>,
): Heading => {
const SEARCH_CONE_MULTIPLIER = 2;
const midPoint = getCenterForBounds(aabb);
if (element.type === "diamond") {
if (point[0] < element.x) {
if (p[0] < element.x) {
return HEADING_LEFT;
} else if (point[1] < element.y) {
} else if (p[1] < element.y) {
return HEADING_UP;
} else if (point[0] > element.x + element.width) {
} else if (p[0] > element.x + element.width) {
return HEADING_RIGHT;
} else if (point[1] > element.y + element.height) {
} else if (p[1] > element.y + element.height) {
return HEADING_DOWN;
}
const top = rotatePoint(
scalePointFromOrigin(
[element.x + element.width / 2, element.y],
const top = pointRotateRads(
pointScaleFromOrigin(
point(element.x + element.width / 2, element.y),
midPoint,
SEARCH_CONE_MULTIPLIER,
),
midPoint,
element.angle,
);
const right = rotatePoint(
scalePointFromOrigin(
[element.x + element.width, element.y + element.height / 2],
const right = pointRotateRads(
pointScaleFromOrigin(
point(element.x + element.width, element.y + element.height / 2),
midPoint,
SEARCH_CONE_MULTIPLIER,
),
midPoint,
element.angle,
);
const bottom = rotatePoint(
scalePointFromOrigin(
[element.x + element.width / 2, element.y + element.height],
const bottom = pointRotateRads(
pointScaleFromOrigin(
point(element.x + element.width / 2, element.y + element.height),
midPoint,
SEARCH_CONE_MULTIPLIER,
),
midPoint,
element.angle,
);
const left = rotatePoint(
scalePointFromOrigin(
[element.x, element.y + element.height / 2],
const left = pointRotateRads(
pointScaleFromOrigin(
point(element.x, element.y + element.height / 2),
midPoint,
SEARCH_CONE_MULTIPLIER,
),
@ -104,43 +117,62 @@ export const headingForPointFromElement = (
element.angle,
);
if (PointInTriangle(point, top, right, midPoint)) {
if (triangleIncludesPoint([top, right, midPoint] as Triangle<Point>, p)) {
return headingForDiamond(top, right);
} else if (PointInTriangle(point, right, bottom, midPoint)) {
} else if (
triangleIncludesPoint([right, bottom, midPoint] as Triangle<Point>, p)
) {
return headingForDiamond(right, bottom);
} else if (PointInTriangle(point, bottom, left, midPoint)) {
} else if (
triangleIncludesPoint([bottom, left, midPoint] as Triangle<Point>, p)
) {
return headingForDiamond(bottom, left);
}
return headingForDiamond(left, top);
}
const topLeft = scalePointFromOrigin(
[aabb[0], aabb[1]],
const topLeft = pointScaleFromOrigin(
point(aabb[0], aabb[1]),
midPoint,
SEARCH_CONE_MULTIPLIER,
);
const topRight = scalePointFromOrigin(
[aabb[2], aabb[1]],
) as Point;
const topRight = pointScaleFromOrigin(
point(aabb[2], aabb[1]),
midPoint,
SEARCH_CONE_MULTIPLIER,
);
const bottomLeft = scalePointFromOrigin(
[aabb[0], aabb[3]],
) as Point;
const bottomLeft = pointScaleFromOrigin(
point(aabb[0], aabb[3]),
midPoint,
SEARCH_CONE_MULTIPLIER,
);
const bottomRight = scalePointFromOrigin(
[aabb[2], aabb[3]],
) as Point;
const bottomRight = pointScaleFromOrigin(
point(aabb[2], aabb[3]),
midPoint,
SEARCH_CONE_MULTIPLIER,
);
) as Point;
return PointInTriangle(point, topLeft, topRight, midPoint)
return triangleIncludesPoint(
[topLeft, topRight, midPoint] as Triangle<Point>,
p,
)
? HEADING_UP
: PointInTriangle(point, topRight, bottomRight, midPoint)
: triangleIncludesPoint(
[topRight, bottomRight, midPoint] as Triangle<Point>,
p,
)
? HEADING_RIGHT
: PointInTriangle(point, bottomRight, bottomLeft, midPoint)
: triangleIncludesPoint(
[bottomRight, bottomLeft, midPoint] as Triangle<Point>,
p,
)
? HEADING_DOWN
: HEADING_LEFT;
};
export const flipHeading = (h: Heading): Heading =>
[
h[0] === 0 ? 0 : h[0] > 0 ? -1 : 1,
h[1] === 0 ? 0 : h[1] > 0 ? -1 : 1,
] as Heading;

355
packages/excalidraw/element/linearElementEditor.ts
View File

@ -11,19 +11,6 @@ import type {
FixedPointBinding,
SceneElementsMap,
} from "./types";
import {
distance2d,
rotate,
isPathALoop,
getGridPoint,
rotatePoint,
centerPoint,
getControlPointsForBezierCurve,
getBezierXY,
getBezierCurveLength,
mapIntervalToBezierT,
arePointsEqual,
} from "../math";
import { getElementAbsoluteCoords, getLockedLinearCursorAlignSize } from ".";
import type { Bounds } from "./bounds";
import {
@ -32,7 +19,6 @@ import {
getMinMaxXYFromCurvePathOps,
} from "./bounds";
import type {
Point,
AppState,
PointerCoords,
InteractiveCanvasAppState,
@ -46,7 +32,7 @@ import {
getHoveredElementForBinding,
isBindingEnabled,
} from "./binding";
import { toBrandedType, tupleToCoors } from "../utils";
import { invariant, toBrandedType, tupleToCoors } from "../utils";
import {
isBindingElement,
isElbowArrow,
@ -60,10 +46,29 @@ import { ShapeCache } from "../scene/ShapeCache";
import type { Store } from "../store";
import { mutateElbowArrow } from "./routing";
import type Scene from "../scene/Scene";
import type { Radians } from "../../math";
import {
pointCenter,
point,
pointRotateRads,
pointsEqual,
vector,
type GlobalPoint,
type LocalPoint,
pointDistance,
} from "../../math";
import {
getBezierCurveLength,
getBezierXY,
getControlPointsForBezierCurve,
isPathALoop,
mapIntervalToBezierT,
} from "../shapes";
import { getGridPoint } from "../snapping";
const editorMidPointsCache: {
version: number | null;
points: (Point | null)[];
points: (GlobalPoint | null)[];
zoom: number | null;
} = { version: null, points: [], zoom: null };
export class LinearElementEditor {
@ -80,7 +85,7 @@ export class LinearElementEditor {
lastClickedIsEndPoint: boolean;
origin: Readonly<{ x: number; y: number }> | null;
segmentMidpoint: {
value: Point | null;
value: GlobalPoint | null;
index: number | null;
added: boolean;
};
@ -88,7 +93,7 @@ export class LinearElementEditor {
/** whether you're dragging a point */
public readonly isDragging: boolean;
public readonly lastUncommittedPoint: Point | null;
public readonly lastUncommittedPoint: LocalPoint | null;
public readonly pointerOffset: Readonly<{ x: number; y: number }>;
public readonly startBindingElement:
| ExcalidrawBindableElement
@ -96,13 +101,13 @@ export class LinearElementEditor {
| "keep";
public readonly endBindingElement: ExcalidrawBindableElement | null | "keep";
public readonly hoverPointIndex: number;
public readonly segmentMidPointHoveredCoords: Point | null;
public readonly segmentMidPointHoveredCoords: GlobalPoint | null;
constructor(element: NonDeleted<ExcalidrawLinearElement>) {
this.elementId = element.id as string & {
_brand: "excalidrawLinearElementId";
};
if (!arePointsEqual(element.points[0], [0, 0])) {
if (!pointsEqual(element.points[0], point(0, 0))) {
console.error("Linear element is not normalized", Error().stack);
}
@ -280,7 +285,7 @@ export class LinearElementEditor {
element,
elementsMap,
referencePoint,
[scenePointerX, scenePointerY],
point(scenePointerX, scenePointerY),
event[KEYS.CTRL_OR_CMD] ? null : app.getEffectiveGridSize(),
);
@ -289,7 +294,10 @@ export class LinearElementEditor {
[
{
index: selectedIndex,
point: [width + referencePoint[0], height + referencePoint[1]],
point: point(
width + referencePoint[0],
height + referencePoint[1],
),
isDragging: selectedIndex === lastClickedPoint,
},
],
@ -310,7 +318,7 @@ export class LinearElementEditor {
LinearElementEditor.movePoints(
element,
selectedPointsIndices.map((pointIndex) => {
const newPointPosition =
const newPointPosition: LocalPoint =
pointIndex === lastClickedPoint
? LinearElementEditor.createPointAt(
element,
@ -319,10 +327,10 @@ export class LinearElementEditor {
scenePointerY - linearElementEditor.pointerOffset.y,
event[KEYS.CTRL_OR_CMD] ? null : app.getEffectiveGridSize(),
)
: ([
: point(
element.points[pointIndex][0] + deltaX,
element.points[pointIndex][1] + deltaY,
] as const);
);
return {
index: pointIndex,
point: newPointPosition,
@ -515,7 +523,7 @@ export class LinearElementEditor {
);
let index = 0;
const midpoints: (Point | null)[] = [];
const midpoints: (GlobalPoint | null)[] = [];
while (index < points.length - 1) {
if (
LinearElementEditor.isSegmentTooShort(
@ -549,7 +557,7 @@ export class LinearElementEditor {
scenePointer: { x: number; y: number },
appState: AppState,
elementsMap: ElementsMap,
) => {
): GlobalPoint | null => {
const { elementId } = linearElementEditor;
const element = LinearElementEditor.getElement(elementId, elementsMap);
if (!element) {
@ -579,11 +587,12 @@ export class LinearElementEditor {
const existingSegmentMidpointHitCoords =
linearElementEditor.segmentMidPointHoveredCoords;
if (existingSegmentMidpointHitCoords) {
const distance = distance2d(
const distance = pointDistance(
point(
existingSegmentMidpointHitCoords[0],
existingSegmentMidpointHitCoords[1],
scenePointer.x,
scenePointer.y,
),
point(scenePointer.x, scenePointer.y),
);
if (distance <= threshold) {
return existingSegmentMidpointHitCoords;
@ -594,11 +603,9 @@ export class LinearElementEditor {
LinearElementEditor.getEditorMidPoints(element, elementsMap, appState);
while (index < midPoints.length) {
if (midPoints[index] !== null) {
const distance = distance2d(
midPoints[index]![0],
midPoints[index]![1],
scenePointer.x,
scenePointer.y,
const distance = pointDistance(
point(midPoints[index]![0], midPoints[index]![1]),
point(scenePointer.x, scenePointer.y),
);
if (distance <= threshold) {
return midPoints[index];
@ -612,15 +619,13 @@ export class LinearElementEditor {
static isSegmentTooShort(
element: NonDeleted<ExcalidrawLinearElement>,
startPoint: Point,
endPoint: Point,
startPoint: GlobalPoint | LocalPoint,
endPoint: GlobalPoint | LocalPoint,
zoom: AppState["zoom"],
) {
let distance = distance2d(
startPoint[0],
startPoint[1],
endPoint[0],
endPoint[1],
let distance = pointDistance(
point(startPoint[0], startPoint[1]),
point(endPoint[0], endPoint[1]),
);
if (element.points.length > 2 && element.roundness) {
distance = getBezierCurveLength(element, endPoint);
@ -631,12 +636,12 @@ export class LinearElementEditor {
static getSegmentMidPoint(
element: NonDeleted<ExcalidrawLinearElement>,
startPoint: Point,
endPoint: Point,
startPoint: GlobalPoint,
endPoint: GlobalPoint,
endPointIndex: number,
elementsMap: ElementsMap,
) {
let segmentMidPoint = centerPoint(startPoint, endPoint);
): GlobalPoint {
let segmentMidPoint = pointCenter(startPoint, endPoint);
if (element.points.length > 2 && element.roundness) {
const controlPoints = getControlPointsForBezierCurve(
element,
@ -649,16 +654,15 @@ export class LinearElementEditor {
0.5,
);
const [tx, ty] = getBezierXY(
segmentMidPoint = LinearElementEditor.getPointGlobalCoordinates(
element,
getBezierXY(
controlPoints[0],
controlPoints[1],
controlPoints[2],
controlPoints[3],
t,
);
segmentMidPoint = LinearElementEditor.getPointGlobalCoordinates(
element,
[tx, ty],
),
elementsMap,
);
}
@ -670,7 +674,7 @@ export class LinearElementEditor {
static getSegmentMidPointIndex(
linearElementEditor: LinearElementEditor,
appState: AppState,
midPoint: Point,
midPoint: GlobalPoint,
elementsMap: ElementsMap,
) {
const element = LinearElementEditor.getElement(
@ -822,11 +826,12 @@ export class LinearElementEditor {
const cy = (y1 + y2) / 2;
const targetPoint =
clickedPointIndex > -1 &&
rotate(
pointRotateRads(
point(
element.x + element.points[clickedPointIndex][0],
element.y + element.points[clickedPointIndex][1],
cx,
cy,
),
point(cx, cy),
element.angle,
);
@ -865,14 +870,17 @@ export class LinearElementEditor {
return ret;
}
static arePointsEqual(point1: Point | null, point2: Point | null) {
static arePointsEqual<Point extends LocalPoint | GlobalPoint>(
point1: Point | null,
point2: Point | null,
) {
if (!point1 && !point2) {
return true;
}
if (!point1 || !point2) {
return false;
}
return arePointsEqual(point1, point2);
return pointsEqual(point1, point2);
}
static handlePointerMove(
@ -909,7 +917,7 @@ export class LinearElementEditor {
};
}
let newPoint: Point;
let newPoint: LocalPoint;
if (shouldRotateWithDiscreteAngle(event) && points.length >= 2) {
const lastCommittedPoint = points[points.length - 2];
@ -918,14 +926,14 @@ export class LinearElementEditor {
element,
elementsMap,
lastCommittedPoint,
[scenePointerX, scenePointerY],
point(scenePointerX, scenePointerY),
event[KEYS.CTRL_OR_CMD] ? null : app.getEffectiveGridSize(),
);
newPoint = [
newPoint = point(
width + lastCommittedPoint[0],
height + lastCommittedPoint[1],
];
);
} else {
newPoint = LinearElementEditor.createPointAt(
element,
@ -965,30 +973,36 @@ export class LinearElementEditor {
/** scene coords */
static getPointGlobalCoordinates(
element: NonDeleted<ExcalidrawLinearElement>,
point: Point,
p: LocalPoint,
elementsMap: ElementsMap,
) {
): GlobalPoint {
const [x1, y1, x2, y2] = getElementAbsoluteCoords(element, elementsMap);
const cx = (x1 + x2) / 2;
const cy = (y1 + y2) / 2;
let { x, y } = element;
[x, y] = rotate(x + point[0], y + point[1], cx, cy, element.angle);
return [x, y] as const;
const { x, y } = element;
return pointRotateRads(
point(x + p[0], y + p[1]),
point(cx, cy),
element.angle,
);
}
/** scene coords */
static getPointsGlobalCoordinates(
element: NonDeleted<ExcalidrawLinearElement>,
elementsMap: ElementsMap,
): Point[] {
): GlobalPoint[] {
const [x1, y1, x2, y2] = getElementAbsoluteCoords(element, elementsMap);
const cx = (x1 + x2) / 2;
const cy = (y1 + y2) / 2;
return element.points.map((point) => {
let { x, y } = element;
[x, y] = rotate(x + point[0], y + point[1], cx, cy, element.angle);
return [x, y] as const;
return element.points.map((p) => {
const { x, y } = element;
return pointRotateRads(
point(x + p[0], y + p[1]),
point(cx, cy),
element.angle,
);
});
}
@ -997,7 +1011,7 @@ export class LinearElementEditor {
indexMaybeFromEnd: number, // -1 for last element
elementsMap: ElementsMap,
): Point {
): GlobalPoint {
const index =
indexMaybeFromEnd < 0
? element.points.length + indexMaybeFromEnd
@ -1005,35 +1019,36 @@ export class LinearElementEditor {
const [x1, y1, x2, y2] = getElementAbsoluteCoords(element, elementsMap);
const cx = (x1 + x2) / 2;
const cy = (y1 + y2) / 2;
const point = element.points[index];
const p = element.points[index];
const { x, y } = element;
return point
? rotate(x + point[0], y + point[1], cx, cy, element.angle)
: rotate(x, y, cx, cy, element.angle);
return p
? pointRotateRads(point(x + p[0], y + p[1]), point(cx, cy), element.angle)
: pointRotateRads(point(x, y), point(cx, cy), element.angle);
}
static pointFromAbsoluteCoords(
element: NonDeleted<ExcalidrawLinearElement>,
absoluteCoords: Point,
absoluteCoords: GlobalPoint,
elementsMap: ElementsMap,
): Point {
): LocalPoint {
if (isElbowArrow(element)) {
// No rotation for elbow arrows
return [absoluteCoords[0] - element.x, absoluteCoords[1] - element.y];
return point(
absoluteCoords[0] - element.x,
absoluteCoords[1] - element.y,
);
}
const [x1, y1, x2, y2] = getElementAbsoluteCoords(element, elementsMap);
const cx = (x1 + x2) / 2;
const cy = (y1 + y2) / 2;
const [x, y] = rotate(
absoluteCoords[0],
absoluteCoords[1],
cx,
cy,
-element.angle,
const [x, y] = pointRotateRads(
point(absoluteCoords[0], absoluteCoords[1]),
point(cx, cy),
-element.angle as Radians,
);
return [x - element.x, y - element.y];
return point(x - element.x, y - element.y);
}
static getPointIndexUnderCursor(
@ -1052,9 +1067,9 @@ export class LinearElementEditor {
// points on the left, thus should take precedence when clicking, if they
// overlap
while (--idx > -1) {
const point = pointHandles[idx];
const p = pointHandles[idx];
if (
distance2d(x, y, point[0], point[1]) * zoom.value <
pointDistance(point(x, y), point(p[0], p[1])) * zoom.value <
// +1px to account for outline stroke
LinearElementEditor.POINT_HANDLE_SIZE + 1
) {
@ -1070,20 +1085,18 @@ export class LinearElementEditor {
scenePointerX: number,
scenePointerY: number,
gridSize: NullableGridSize,
): Point {
): LocalPoint {
const pointerOnGrid = getGridPoint(scenePointerX, scenePointerY, gridSize);
const [x1, y1, x2, y2] = getElementAbsoluteCoords(element, elementsMap);
const cx = (x1 + x2) / 2;
const cy = (y1 + y2) / 2;
const [rotatedX, rotatedY] = rotate(
pointerOnGrid[0],
pointerOnGrid[1],
cx,
cy,
-element.angle,
const [rotatedX, rotatedY] = pointRotateRads(
point(pointerOnGrid[0], pointerOnGrid[1]),
point(cx, cy),
-element.angle as Radians,
);
return [rotatedX - element.x, rotatedY - element.y];
return point(rotatedX - element.x, rotatedY - element.y);
}
/**
@ -1091,15 +1104,19 @@ export class LinearElementEditor {
* expected in various parts of the codebase. Also returns new x/y to account
* for the potential normalization.
*/
static getNormalizedPoints(element: ExcalidrawLinearElement) {
static getNormalizedPoints(element: ExcalidrawLinearElement): {
points: LocalPoint[];
x: number;
y: number;
} {
const { points } = element;
const offsetX = points[0][0];
const offsetY = points[0][1];
return {
points: points.map((point) => {
return [point[0] - offsetX, point[1] - offsetY] as const;
points: points.map((p) => {
return point(p[0] - offsetX, p[1] - offsetY);
}),
x: element.x + offsetX,
y: element.y + offsetY,
@ -1116,17 +1133,23 @@ export class LinearElementEditor {
static duplicateSelectedPoints(
appState: AppState,
elementsMap: NonDeletedSceneElementsMap | SceneElementsMap,
) {
if (!appState.editingLinearElement) {
return false;
}
): AppState {
invariant(
appState.editingLinearElement,
"Not currently editing a linear element",
);
const { selectedPointsIndices, elementId } = appState.editingLinearElement;
const element = LinearElementEditor.getElement(elementId, elementsMap);
if (!element || selectedPointsIndices === null) {
return false;
}
invariant(
element,
"The linear element does not exist in the provided Scene",
);
invariant(
selectedPointsIndices != null,
"There are no selected points to duplicate",
);
const { points } = element;
@ -1134,9 +1157,9 @@ export class LinearElementEditor {
let pointAddedToEnd = false;
let indexCursor = -1;
const nextPoints = points.reduce((acc: Point[], point, index) => {
const nextPoints = points.reduce((acc: LocalPoint[], p, index) => {
++indexCursor;
acc.push(point);
acc.push(p);
const isSelected = selectedPointsIndices.includes(index);
if (isSelected) {
@ -1147,8 +1170,8 @@ export class LinearElementEditor {
}
acc.push(
nextPoint
? [(point[0] + nextPoint[0]) / 2, (point[1] + nextPoint[1]) / 2]
: [point[0], point[1]],
? point((p[0] + nextPoint[0]) / 2, (p[1] + nextPoint[1]) / 2)
: point(p[0], p[1]),
);
nextSelectedIndices.push(indexCursor + 1);
@ -1169,7 +1192,7 @@ export class LinearElementEditor {
[
{
index: element.points.length - 1,
point: [lastPoint[0] + 30, lastPoint[1] + 30],
point: point(lastPoint[0] + 30, lastPoint[1] + 30),
},
],
elementsMap,
@ -1177,13 +1200,11 @@ export class LinearElementEditor {
}
return {
appState: {
...appState,
editingLinearElement: {
...appState.editingLinearElement,
selectedPointsIndices: nextSelectedIndices,
},
},
};
}
@ -1209,10 +1230,10 @@ export class LinearElementEditor {
}
}
const nextPoints = element.points.reduce((acc: Point[], point, idx) => {
const nextPoints = element.points.reduce((acc: LocalPoint[], p, idx) => {
if (!pointIndices.includes(idx)) {
acc.push(
!acc.length ? [0, 0] : [point[0] - offsetX, point[1] - offsetY],
!acc.length ? point(0, 0) : point(p[0] - offsetX, p[1] - offsetY),
);
}
return acc;
@ -1229,7 +1250,7 @@ export class LinearElementEditor {
static addPoints(
element: NonDeleted<ExcalidrawLinearElement>,
targetPoints: { point: Point }[],
targetPoints: { point: LocalPoint }[],
elementsMap: NonDeletedSceneElementsMap | SceneElementsMap,
) {
const offsetX = 0;
@ -1247,7 +1268,7 @@ export class LinearElementEditor {
static movePoints(
element: NonDeleted<ExcalidrawLinearElement>,
targetPoints: { index: number; point: Point; isDragging?: boolean }[],
targetPoints: { index: number; point: LocalPoint; isDragging?: boolean }[],
elementsMap: NonDeletedSceneElementsMap | SceneElementsMap,
otherUpdates?: {
startBinding?: PointBinding | null;
@ -1277,11 +1298,11 @@ export class LinearElementEditor {
selectedOriginPoint.point[1] + points[selectedOriginPoint.index][1];
}
const nextPoints = points.map((point, idx) => {
const selectedPointData = targetPoints.find((p) => p.index === idx);
const nextPoints: LocalPoint[] = points.map((p, idx) => {
const selectedPointData = targetPoints.find((t) => t.index === idx);
if (selectedPointData) {
if (selectedPointData.index === 0) {
return point;
return p;
}
const deltaX =
@ -1289,14 +1310,9 @@ export class LinearElementEditor {
const deltaY =
selectedPointData.point[1] - points[selectedPointData.index][1];
return [
point[0] + deltaX - offsetX,
point[1] + deltaY - offsetY,
] as const;
return point(p[0] + deltaX - offsetX, p[1] + deltaY - offsetY);
}
return offsetX || offsetY
? ([point[0] - offsetX, point[1] - offsetY] as const)
: point;
return offsetX || offsetY ? point(p[0] - offsetX, p[1] - offsetY) : p;
});
LinearElementEditor._updatePoints(
@ -1349,11 +1365,9 @@ export class LinearElementEditor {
}
const origin = linearElementEditor.pointerDownState.origin!;
const dist = distance2d(
origin.x,
origin.y,
pointerCoords.x,
pointerCoords.y,
const dist = pointDistance(
point(origin.x, origin.y),
point(pointerCoords.x, pointerCoords.y),
);
if (
!appState.editingLinearElement &&
@ -1418,7 +1432,7 @@ export class LinearElementEditor {
private static _updatePoints(
element: NonDeleted<ExcalidrawLinearElement>,
nextPoints: readonly Point[],
nextPoints: readonly LocalPoint[],
offsetX: number,
offsetY: number,
elementsMap: NonDeletedSceneElementsMap | SceneElementsMap,
@ -1461,7 +1475,7 @@ export class LinearElementEditor {
element,
mergedElementsMap,
nextPoints,
[offsetX, offsetY],
vector(offsetX, offsetY),
bindings,
options,
);
@ -1474,7 +1488,11 @@ export class LinearElementEditor {
const prevCenterY = (prevCoords[1] + prevCoords[3]) / 2;
const dX = prevCenterX - nextCenterX;
const dY = prevCenterY - nextCenterY;
const rotated = rotate(offsetX, offsetY, dX, dY, element.angle);
const rotated = pointRotateRads(
point(offsetX, offsetY),
point(dX, dY),
element.angle,
);
mutateElement(element, {
...otherUpdates,
points: nextPoints,
@ -1487,8 +1505,8 @@ export class LinearElementEditor {
private static _getShiftLockedDelta(
element: NonDeleted<ExcalidrawLinearElement>,
elementsMap: ElementsMap,
referencePoint: Point,
scenePointer: Point,
referencePoint: LocalPoint,
scenePointer: GlobalPoint,
gridSize: NullableGridSize,
) {
const referencePointCoords = LinearElementEditor.getPointGlobalCoordinates(
@ -1517,7 +1535,11 @@ export class LinearElementEditor {
gridY,
);
return rotatePoint([width, height], [0, 0], -element.angle);
return pointRotateRads(
point(width, height),
point(0, 0),
-element.angle as Radians,
);
}
static getBoundTextElementPosition = (
@ -1548,7 +1570,7 @@ export class LinearElementEditor {
let midSegmentMidpoint = editorMidPointsCache.points[index];
if (element.points.length === 2) {
midSegmentMidpoint = centerPoint(points[0], points[1]);
midSegmentMidpoint = pointCenter(points[0], points[1]);
}
if (
!midSegmentMidpoint ||
@ -1585,37 +1607,38 @@ export class LinearElementEditor {
);
const boundTextX2 = boundTextX1 + boundTextElement.width;
const boundTextY2 = boundTextY1 + boundTextElement.height;
const centerPoint = point(cx, cy);
const topLeftRotatedPoint = rotatePoint([x1, y1], [cx, cy], element.angle);
const topRightRotatedPoint = rotatePoint([x2, y1], [cx, cy], element.angle);
const counterRotateBoundTextTopLeft = rotatePoint(
[boundTextX1, boundTextY1],
[cx, cy],
-element.angle,
const topLeftRotatedPoint = pointRotateRads(
point(x1, y1),
centerPoint,
element.angle,
);
const counterRotateBoundTextTopRight = rotatePoint(
[boundTextX2, boundTextY1],
[cx, cy],
-element.angle,
const topRightRotatedPoint = pointRotateRads(
point(x2, y1),
centerPoint,
element.angle,
);
const counterRotateBoundTextBottomLeft = rotatePoint(
[boundTextX1, boundTextY2],
[cx, cy],
-element.angle,
const counterRotateBoundTextTopLeft = pointRotateRads(
point(boundTextX1, boundTextY1),
centerPoint,
-element.angle as Radians,
);
const counterRotateBoundTextBottomRight = rotatePoint(
[boundTextX2, boundTextY2],
[cx, cy],
-element.angle,
const counterRotateBoundTextTopRight = pointRotateRads(
point(boundTextX2, boundTextY1),
centerPoint,
-element.angle as Radians,
);
const counterRotateBoundTextBottomLeft = pointRotateRads(
point(boundTextX1, boundTextY2),
centerPoint,
-element.angle as Radians,
);
const counterRotateBoundTextBottomRight = pointRotateRads(
point(boundTextX2, boundTextY2),
centerPoint,
-element.angle as Radians,
);
if (

5
packages/excalidraw/element/mutateElement.ts
View File

@ -2,7 +2,6 @@ import type { ExcalidrawElement } from "./types";
import Scene from "../scene/Scene";
import { getSizeFromPoints } from "../points";
import { randomInteger } from "../random";
import type { Point } from "../types";
import { getUpdatedTimestamp } from "../utils";
import type { Mutable } from "../utility-types";
import { ShapeCache } from "../scene/ShapeCache";
@ -59,8 +58,8 @@ export const mutateElement = <TElement extends Mutable<ExcalidrawElement>>(
let didChangePoints = false;
let index = prevPoints.length;
while (--index) {
const prevPoint: Point = prevPoints[index];
const nextPoint: Point = nextPoints[index];
const prevPoint = prevPoints[index];
const nextPoint = nextPoints[index];
if (
prevPoint[0] !== nextPoint[0] ||
prevPoint[1] !== nextPoint[1]

7
packages/excalidraw/element/newElement.test.ts
View File

@ -4,6 +4,8 @@ import { API } from "../tests/helpers/api";
import { FONT_FAMILY, ROUNDNESS } from "../constants";
import { isPrimitive } from "../utils";
import type { ExcalidrawLinearElement } from "./types";
import type { LocalPoint } from "../../math";
import { point } from "../../math";
const assertCloneObjects = (source: any, clone: any) => {
for (const key in clone) {
@ -36,10 +38,7 @@ describe("duplicating single elements", () => {
element.__proto__ = { hello: "world" };
mutateElement(element, {
points: [
[1, 2],
[3, 4],
],
points: [point<LocalPoint>(1, 2), point<LocalPoint>(3, 4)],
});
const copy = duplicateElement(null, new Map(), element);

51
packages/excalidraw/element/newElement.ts
View File

@ -30,7 +30,6 @@ import { bumpVersion, newElementWith } from "./mutateElement";
import { getNewGroupIdsForDuplication } from "../groups";
import type { AppState } from "../types";
import { getElementAbsoluteCoords } from ".";
import { adjustXYWithRotation } from "../math";
import { getResizedElementAbsoluteCoords } from "./bounds";
import {
measureText,
@ -48,6 +47,7 @@ import {
} from "../constants";
import type { MarkOptional, Merge, Mutable } from "../utility-types";
import { getLineHeight } from "../fonts";
import type { Radians } from "../../math";
export type ElementConstructorOpts = MarkOptional<
Omit<ExcalidrawGenericElement, "id" | "type" | "isDeleted" | "updated">,
@ -88,7 +88,7 @@ const _newElementBase = <T extends ExcalidrawElement>(
opacity = DEFAULT_ELEMENT_PROPS.opacity,
width = 0,
height = 0,
angle = 0,
angle = 0 as Radians,
groupIds = [],
frameId = null,
index = null,
@ -348,6 +348,53 @@ const getAdjustedDimensions = (
};
};
const adjustXYWithRotation = (
sides: {
n?: boolean;
e?: boolean;
s?: boolean;
w?: boolean;
},
x: number,
y: number,
angle: number,
deltaX1: number,
deltaY1: number,
deltaX2: number,
deltaY2: number,
): [number, number] => {
const cos = Math.cos(angle);
const sin = Math.sin(angle);
if (sides.e && sides.w) {
x += deltaX1 + deltaX2;
} else if (sides.e) {
x += deltaX1 * (1 + cos);
y += deltaX1 * sin;
x += deltaX2 * (1 - cos);
y += deltaX2 * -sin;
} else if (sides.w) {
x += deltaX1 * (1 - cos);
y += deltaX1 * -sin;
x += deltaX2 * (1 + cos);
y += deltaX2 * sin;
}
if (sides.n && sides.s) {
y += deltaY1 + deltaY2;
} else if (sides.n) {
x += deltaY1 * sin;
y += deltaY1 * (1 - cos);
x += deltaY2 * -sin;
y += deltaY2 * (1 + cos);
} else if (sides.s) {
x += deltaY1 * -sin;
y += deltaY1 * (1 + cos);
x += deltaY2 * sin;
y += deltaY2 * (1 - cos);
}
return [x, y];
};
export const refreshTextDimensions = (
textElement: ExcalidrawTextElement,
container: ExcalidrawTextContainer | null,

214
packages/excalidraw/element/resizeElements.ts
View File

@ -1,7 +1,5 @@
import { MIN_FONT_SIZE, SHIFT_LOCKING_ANGLE } from "../constants";
import { rescalePoints } from "../points";
import { rotate, centerPoint, rotatePoint } from "../math";
import type {
ExcalidrawLinearElement,
ExcalidrawTextElement,
@ -38,7 +36,7 @@ import type {
MaybeTransformHandleType,
TransformHandleDirection,
} from "./transformHandles";
import type { Point, PointerDownState } from "../types";
import type { PointerDownState } from "../types";
import Scene from "../scene/Scene";
import {
getApproxMinLineWidth,
@ -55,16 +53,15 @@ import {
import { LinearElementEditor } from "./linearElementEditor";
import { isInGroup } from "../groups";
import { mutateElbowArrow } from "./routing";
export const normalizeAngle = (angle: number): number => {
if (angle < 0) {
return angle + 2 * Math.PI;
}
if (angle >= 2 * Math.PI) {
return angle - 2 * Math.PI;
}
return angle;
};
import type { GlobalPoint } from "../../math";
import {
pointCenter,
normalizeRadians,
point,
pointFromPair,
pointRotateRads,
type Radians,
} from "../../math";
// Returns true when transform (resizing/rotation) happened
export const transformElements = (
@ -158,16 +155,17 @@ const rotateSingleElement = (
const [x1, y1, x2, y2] = getElementAbsoluteCoords(element, elementsMap);
const cx = (x1 + x2) / 2;
const cy = (y1 + y2) / 2;
let angle: number;
let angle: Radians;
if (isFrameLikeElement(element)) {
angle = 0;
angle = 0 as Radians;
} else {
angle = (5 * Math.PI) / 2 + Math.atan2(pointerY - cy, pointerX - cx);
angle = ((5 * Math.PI) / 2 +
Math.atan2(pointerY - cy, pointerX - cx)) as Radians;
if (shouldRotateWithDiscreteAngle) {
angle += SHIFT_LOCKING_ANGLE / 2;
angle -= angle % SHIFT_LOCKING_ANGLE;
angle = (angle + SHIFT_LOCKING_ANGLE / 2) as Radians;
angle = (angle - (angle % SHIFT_LOCKING_ANGLE)) as Radians;
}
angle = normalizeAngle(angle);
angle = normalizeRadians(angle as Radians);
}
const boundTextElementId = getBoundTextElementId(element);
@ -240,12 +238,10 @@ const resizeSingleTextElement = (
elementsMap,
);
// rotation pointer with reverse angle
const [rotatedX, rotatedY] = rotate(
pointerX,
pointerY,
cx,
cy,
-element.angle,
const [rotatedX, rotatedY] = pointRotateRads(
point(pointerX, pointerY),
point(cx, cy),
-element.angle as Radians,
);
let scaleX = 0;
let scaleY = 0;
@ -279,20 +275,26 @@ const resizeSingleTextElement = (
const startBottomRight = [x2, y2];
const startCenter = [cx, cy];
let newTopLeft = [x1, y1] as [number, number];
let newTopLeft = point<GlobalPoint>(x1, y1);
if (["n", "w", "nw"].includes(transformHandleType)) {
newTopLeft = [
newTopLeft = point<GlobalPoint>(
startBottomRight[0] - Math.abs(nextWidth),
startBottomRight[1] - Math.abs(nextHeight),
];
);
}
if (transformHandleType === "ne") {
const bottomLeft = [startTopLeft[0], startBottomRight[1]];
newTopLeft = [bottomLeft[0], bottomLeft[1] - Math.abs(nextHeight)];
newTopLeft = point<GlobalPoint>(
bottomLeft[0],
bottomLeft[1] - Math.abs(nextHeight),
);
}
if (transformHandleType === "sw") {
const topRight = [startBottomRight[0], startTopLeft[1]];
newTopLeft = [topRight[0] - Math.abs(nextWidth), topRight[1]];
newTopLeft = point<GlobalPoint>(
topRight[0] - Math.abs(nextWidth),
topRight[1],
);
}
if (["s", "n"].includes(transformHandleType)) {
@ -308,13 +310,17 @@ const resizeSingleTextElement = (
}
const angle = element.angle;
const rotatedTopLeft = rotatePoint(newTopLeft, [cx, cy], angle);
const newCenter: Point = [
const rotatedTopLeft = pointRotateRads(newTopLeft, point(cx, cy), angle);
const newCenter = point<GlobalPoint>(
newTopLeft[0] + Math.abs(nextWidth) / 2,
newTopLeft[1] + Math.abs(nextHeight) / 2,
];
const rotatedNewCenter = rotatePoint(newCenter, [cx, cy], angle);
newTopLeft = rotatePoint(rotatedTopLeft, rotatedNewCenter, -angle);
);
const rotatedNewCenter = pointRotateRads(newCenter, point(cx, cy), angle);
newTopLeft = pointRotateRads(
rotatedTopLeft,
rotatedNewCenter,
-angle as Radians,
);
const [nextX, nextY] = newTopLeft;
mutateElement(element, {
@ -334,14 +340,14 @@ const resizeSingleTextElement = (
stateAtResizeStart.height,
true,
);
const startTopLeft: Point = [x1, y1];
const startBottomRight: Point = [x2, y2];
const startCenter: Point = centerPoint(startTopLeft, startBottomRight);
const startTopLeft = point<GlobalPoint>(x1, y1);
const startBottomRight = point<GlobalPoint>(x2, y2);
const startCenter = pointCenter(startTopLeft, startBottomRight);
const rotatedPointer = rotatePoint(
[pointerX, pointerY],
const rotatedPointer = pointRotateRads(
point(pointerX, pointerY),
startCenter,
-stateAtResizeStart.angle,
-stateAtResizeStart.angle as Radians,
);
const [esx1, , esx2] = getResizedElementAbsoluteCoords(
@ -407,13 +413,21 @@ const resizeSingleTextElement = (
// adjust topLeft to new rotation point
const angle = stateAtResizeStart.angle;
const rotatedTopLeft = rotatePoint(newTopLeft, startCenter, angle);
const newCenter: Point = [
const rotatedTopLeft = pointRotateRads(
pointFromPair(newTopLeft),
startCenter,
angle,
);
const newCenter = point(
newTopLeft[0] + Math.abs(newBoundsWidth) / 2,
newTopLeft[1] + Math.abs(newBoundsHeight) / 2,
];
const rotatedNewCenter = rotatePoint(newCenter, startCenter, angle);
newTopLeft = rotatePoint(rotatedTopLeft, rotatedNewCenter, -angle);
);
const rotatedNewCenter = pointRotateRads(newCenter, startCenter, angle);
newTopLeft = pointRotateRads(
rotatedTopLeft,
rotatedNewCenter,
-angle as Radians,
);
const resizedElement: Partial<ExcalidrawTextElement> = {
width: Math.abs(newWidth),
@ -446,15 +460,15 @@ export const resizeSingleElement = (
stateAtResizeStart.height,
true,
);
const startTopLeft: Point = [x1, y1];
const startBottomRight: Point = [x2, y2];
const startCenter: Point = centerPoint(startTopLeft, startBottomRight);
const startTopLeft = point(x1, y1);
const startBottomRight = point(x2, y2);
const startCenter = pointCenter(startTopLeft, startBottomRight);
// Calculate new dimensions based on cursor position
const rotatedPointer = rotatePoint(
[pointerX, pointerY],
const rotatedPointer = pointRotateRads(
point(pointerX, pointerY),
startCenter,
-stateAtResizeStart.angle,
-stateAtResizeStart.angle as Radians,
);
// Get bounds corners rendered on screen
@ -628,13 +642,21 @@ export const resizeSingleElement = (
// adjust topLeft to new rotation point
const angle = stateAtResizeStart.angle;
const rotatedTopLeft = rotatePoint(newTopLeft, startCenter, angle);
const newCenter: Point = [
const rotatedTopLeft = pointRotateRads(
pointFromPair(newTopLeft),
startCenter,
angle,
);
const newCenter = point(
newTopLeft[0] + Math.abs(newBoundsWidth) / 2,
newTopLeft[1] + Math.abs(newBoundsHeight) / 2,
];
const rotatedNewCenter = rotatePoint(newCenter, startCenter, angle);
newTopLeft = rotatePoint(rotatedTopLeft, rotatedNewCenter, -angle);
);
const rotatedNewCenter = pointRotateRads(newCenter, startCenter, angle);
newTopLeft = pointRotateRads(
rotatedTopLeft,
rotatedNewCenter,
-angle as Radians,
);
// For linear elements (x,y) are the coordinates of the first drawn point not the top-left corner
// So we need to readjust (x,y) to be where the first point should be
@ -793,21 +815,21 @@ export const resizeMultipleElements = (
const direction = transformHandleType;
const anchorsMap: Record<TransformHandleDirection, Point> = {
ne: [minX, maxY],
se: [minX, minY],
sw: [maxX, minY],
nw: [maxX, maxY],
e: [minX, minY + height / 2],
w: [maxX, minY + height / 2],
n: [minX + width / 2, maxY],
s: [minX + width / 2, minY],
const anchorsMap: Record<TransformHandleDirection, GlobalPoint> = {
ne: point(minX, maxY),
se: point(minX, minY),
sw: point(maxX, minY),
nw: point(maxX, maxY),
e: point(minX, minY + height / 2),
w: point(maxX, minY + height / 2),
n: point(minX + width / 2, maxY),
s: point(minX + width / 2, minY),
};
// anchor point must be on the opposite side of the dragged selection handle
// or be the center of the selection if shouldResizeFromCenter
const [anchorX, anchorY]: Point = shouldResizeFromCenter
? [midX, midY]
const [anchorX, anchorY] = shouldResizeFromCenter
? point(midX, midY)
: anchorsMap[direction];
const resizeFromCenterScale = shouldResizeFromCenter ? 2 : 1;
@ -898,7 +920,9 @@ export const resizeMultipleElements = (
const width = orig.width * scaleX;
const height = orig.height * scaleY;
const angle = normalizeAngle(orig.angle * flipFactorX * flipFactorY);
const angle = normalizeRadians(
(orig.angle * flipFactorX * flipFactorY) as Radians,
);
const isLinearOrFreeDraw = isLinearElement(orig) || isFreeDrawElement(orig);
const offsetX = orig.x - anchorX;
@ -1029,12 +1053,10 @@ const rotateMultipleElements = (
const cy = (y1 + y2) / 2;
const origAngle =
originalElements.get(element.id)?.angle ?? element.angle;
const [rotatedCX, rotatedCY] = rotate(
cx,
cy,
centerX,
centerY,
centerAngle + origAngle - element.angle,
const [rotatedCX, rotatedCY] = pointRotateRads(
point(cx, cy),
point(centerX, centerY),
(centerAngle + origAngle - element.angle) as Radians,
);
if (isArrowElement(element) && isElbowArrow(element)) {
@ -1046,7 +1068,7 @@ const rotateMultipleElements = (
{
x: element.x + (rotatedCX - cx),
y: element.y + (rotatedCY - cy),
angle: normalizeAngle(centerAngle + origAngle),
angle: normalizeRadians((centerAngle + origAngle) as Radians),
},
false,
);
@ -1063,7 +1085,7 @@ const rotateMultipleElements = (
{
x: boundText.x + (rotatedCX - cx),
y: boundText.y + (rotatedCY - cy),
angle: normalizeAngle(centerAngle + origAngle),
angle: normalizeRadians((centerAngle + origAngle) as Radians),
},
false,
);
@ -1086,25 +1108,43 @@ export const getResizeOffsetXY = (
: getCommonBounds(selectedElements);
const cx = (x1 + x2) / 2;
const cy = (y1 + y2) / 2;
const angle = selectedElements.length === 1 ? selectedElements[0].angle : 0;
[x, y] = rotate(x, y, cx, cy, -angle);
const angle = (
selectedElements.length === 1 ? selectedElements[0].angle : 0
) as Radians;
[x, y] = pointRotateRads(point(x, y), point(cx, cy), -angle as Radians);
switch (transformHandleType) {
case "n":
return rotate(x - (x1 + x2) / 2, y - y1, 0, 0, angle);
return pointRotateRads(
point(x - (x1 + x2) / 2, y - y1),
point(0, 0),
angle,
);
case "s":
return rotate(x - (x1 + x2) / 2, y - y2, 0, 0, angle);
return pointRotateRads(
point(x - (x1 + x2) / 2, y - y2),
point(0, 0),
angle,
);
case "w":
return rotate(x - x1, y - (y1 + y2) / 2, 0, 0, angle);
return pointRotateRads(
point(x - x1, y - (y1 + y2) / 2),
point(0, 0),
angle,
);
case "e":
return rotate(x - x2, y - (y1 + y2) / 2, 0, 0, angle);
return pointRotateRads(
point(x - x2, y - (y1 + y2) / 2),
point(0, 0),
angle,
);
case "nw":
return rotate(x - x1, y - y1, 0, 0, angle);
return pointRotateRads(point(x - x1, y - y1), point(0, 0), angle);
case "ne":
return rotate(x - x2, y - y1, 0, 0, angle);
return pointRotateRads(point(x - x2, y - y1), point(0, 0), angle);
case "sw":
return rotate(x - x1, y - y2, 0, 0, angle);
return pointRotateRads(point(x - x1, y - y2), point(0, 0), angle);
case "se":
return rotate(x - x2, y - y2, 0, 0, angle);
return pointRotateRads(point(x - x2, y - y2), point(0, 0), angle);
default:
return [0, 0];
}

61
packages/excalidraw/element/resizeTest.ts
View File

@ -20,13 +20,14 @@ import type { AppState, Device, Zoom } from "../types";
import type { Bounds } from "./bounds";
import { getElementAbsoluteCoords } from "./bounds";
import { SIDE_RESIZING_THRESHOLD } from "../constants";
import {
angleToDegrees,
pointOnLine,
pointRotate,
} from "../../utils/geometry/geometry";
import type { Line, Point } from "../../utils/geometry/shape";
import { isLinearElement } from "./typeChecks";
import type { GlobalPoint, LineSegment, LocalPoint } from "../../math";
import {
point,
pointOnLineSegment,
pointRotateRads,
type Radians,
} from "../../math";
const isInsideTransformHandle = (
transformHandle: TransformHandle,
@ -38,7 +39,7 @@ const isInsideTransformHandle = (
y >= transformHandle[1] &&
y <= transformHandle[1] + transformHandle[3];
export const resizeTest = (
export const resizeTest = <Point extends GlobalPoint | LocalPoint>(
element: NonDeletedExcalidrawElement,
elementsMap: ElementsMap,
appState: AppState,
@ -91,15 +92,17 @@ export const resizeTest = (
if (!(isLinearElement(element) && element.points.length <= 2)) {
const SPACING = SIDE_RESIZING_THRESHOLD / zoom.value;
const sides = getSelectionBorders(
[x1 - SPACING, y1 - SPACING],
[x2 + SPACING, y2 + SPACING],
[cx, cy],
angleToDegrees(element.angle),
point(x1 - SPACING, y1 - SPACING),
point(x2 + SPACING, y2 + SPACING),
point(cx, cy),
element.angle,
);
for (const [dir, side] of Object.entries(sides)) {
// test to see if x, y are on the line segment
if (pointOnLine([x, y], side as Line, SPACING)) {
if (
pointOnLineSegment(point(x, y), side as LineSegment<Point>, SPACING)
) {
return dir as TransformHandleType;
}
}
@ -137,7 +140,9 @@ export const getElementWithTransformHandleType = (
}, null as { element: NonDeletedExcalidrawElement; transformHandleType: MaybeTransformHandleType } | null);
};
export const getTransformHandleTypeFromCoords = (
export const getTransformHandleTypeFromCoords = <
Point extends GlobalPoint | LocalPoint,
>(
[x1, y1, x2, y2]: Bounds,
scenePointerX: number,
scenePointerY: number,
@ -147,7 +152,7 @@ export const getTransformHandleTypeFromCoords = (
): MaybeTransformHandleType => {
const transformHandles = getTransformHandlesFromCoords(
[x1, y1, x2, y2, (x1 + x2) / 2, (y1 + y2) / 2],
0,
0 as Radians,
zoom,
pointerType,
getOmitSidesForDevice(device),
@ -173,15 +178,21 @@ export const getTransformHandleTypeFromCoords = (
const SPACING = SIDE_RESIZING_THRESHOLD / zoom.value;
const sides = getSelectionBorders(
[x1 - SPACING, y1 - SPACING],
[x2 + SPACING, y2 + SPACING],
[cx, cy],
angleToDegrees(0),
point(x1 - SPACING, y1 - SPACING),
point(x2 + SPACING, y2 + SPACING),
point(cx, cy),
0 as Radians,
);
for (const [dir, side] of Object.entries(sides)) {
// test to see if x, y are on the line segment
if (pointOnLine([scenePointerX, scenePointerY], side as Line, SPACING)) {
if (
pointOnLineSegment(
point(scenePointerX, scenePointerY),
side as LineSegment<Point>,
SPACING,
)
) {
return dir as TransformHandleType;
}
}
@ -248,16 +259,16 @@ export const getCursorForResizingElement = (resizingElement: {
return cursor ? `${cursor}-resize` : "";
};
const getSelectionBorders = (
const getSelectionBorders = <Point extends LocalPoint | GlobalPoint>(
[x1, y1]: Point,
[x2, y2]: Point,
center: Point,
angleInDegrees: number,
angle: Radians,
) => {
const topLeft = pointRotate([x1, y1], angleInDegrees, center);
const topRight = pointRotate([x2, y1], angleInDegrees, center);
const bottomLeft = pointRotate([x1, y2], angleInDegrees, center);
const bottomRight = pointRotate([x2, y2], angleInDegrees, center);
const topLeft = pointRotateRads(point(x1, y1), center, angle);
const topRight = pointRotateRads(point(x2, y1), center, angle);
const bottomLeft = pointRotateRads(point(x1, y2), center, angle);
const bottomRight = pointRotateRads(point(x2, y2), center, angle);
return {
n: [topLeft, topRight],

15
packages/excalidraw/element/routing.test.tsx
View File

@ -17,6 +17,7 @@ import type {
ExcalidrawElbowArrowElement,
} from "./types";
import { ARROW_TYPE } from "../constants";
import { point } from "../../math";
const { h } = window;
@ -31,8 +32,8 @@ describe("elbow arrow routing", () => {
}) as ExcalidrawElbowArrowElement;
scene.insertElement(arrow);
mutateElbowArrow(arrow, scene.getNonDeletedElementsMap(), [
[-45 - arrow.x, -100.1 - arrow.y],
[45 - arrow.x, 99.9 - arrow.y],
point(-45 - arrow.x, -100.1 - arrow.y),
point(45 - arrow.x, 99.9 - arrow.y),
]);
expect(arrow.points).toEqual([
[0, 0],
@ -68,10 +69,7 @@ describe("elbow arrow routing", () => {
y: -100.1,
width: 90,
height: 200,
points: [
[0, 0],
[90, 200],
],
points: [point(0, 0), point(90, 200)],
}) as ExcalidrawElbowArrowElement;
scene.insertElement(rectangle1);
scene.insertElement(rectangle2);
@ -83,10 +81,7 @@ describe("elbow arrow routing", () => {
expect(arrow.startBinding).not.toBe(null);
expect(arrow.endBinding).not.toBe(null);
mutateElbowArrow(arrow, elementsMap, [
[0, 0],
[90, 200],
]);
mutateElbowArrow(arrow, elementsMap, [point(0, 0), point(90, 200)]);
expect(arrow.points).toEqual([
[0, 0],

199
packages/excalidraw/element/routing.ts
View File

@ -1,16 +1,19 @@
import { cross } from "../../utils/geometry/geometry";
import BinaryHeap from "../binaryheap";
import type { Radians } from "../../math";
import {
aabbForElement,
arePointsEqual,
pointInsideBounds,
pointToVector,
scalePointFromOrigin,
scaleVector,
translatePoint,
} from "../math";
point,
pointScaleFromOrigin,
pointTranslate,
vector,
vectorCross,
vectorFromPoint,
vectorScale,
type GlobalPoint,
type LocalPoint,
type Vector,
} from "../../math";
import BinaryHeap from "../binaryheap";
import { getSizeFromPoints } from "../points";
import type { Point } from "../types";
import { aabbForElement, pointInsideBounds } from "../shapes";
import { isAnyTrue, toBrandedType, tupleToCoors } from "../utils";
import {
bindPointToSnapToElementOutline,
@ -25,6 +28,8 @@ import {
import type { Bounds } from "./bounds";
import type { Heading } from "./heading";
import {
compareHeading,
flipHeading,
HEADING_DOWN,
HEADING_LEFT,
HEADING_RIGHT,
@ -41,6 +46,8 @@ import type {
} from "./types";
import type { ElementsMap, ExcalidrawBindableElement } from "./types";
type GridAddress = [number, number] & { _brand: "gridaddress" };
type Node = {
f: number;
g: number;
@ -48,8 +55,8 @@ type Node = {
closed: boolean;
visited: boolean;
parent: Node | null;
pos: Point;
addr: [number, number];
pos: GlobalPoint;
addr: GridAddress;
};
type Grid = {
@ -63,8 +70,8 @@ const BASE_PADDING = 40;
export const mutateElbowArrow = (
arrow: ExcalidrawElbowArrowElement,
elementsMap: NonDeletedSceneElementsMap | SceneElementsMap,
nextPoints: readonly Point[],
offset?: Point,
nextPoints: readonly LocalPoint[],
offset?: Vector,
otherUpdates?: {
startBinding?: FixedPointBinding | null;
endBinding?: FixedPointBinding | null;
@ -75,14 +82,20 @@ export const mutateElbowArrow = (
informMutation?: boolean;
},
) => {
const origStartGlobalPoint = translatePoint(nextPoints[0], [
arrow.x + (offset ? offset[0] : 0),
arrow.y + (offset ? offset[1] : 0),
]);
const origEndGlobalPoint = translatePoint(nextPoints[nextPoints.length - 1], [
arrow.x + (offset ? offset[0] : 0),
arrow.y + (offset ? offset[1] : 0),
]);
const origStartGlobalPoint: GlobalPoint = pointTranslate(
pointTranslate<LocalPoint, GlobalPoint>(
nextPoints[0],
vector(arrow.x, arrow.y),
),
offset,
);
const origEndGlobalPoint: GlobalPoint = pointTranslate(
pointTranslate<LocalPoint, GlobalPoint>(
nextPoints[nextPoints.length - 1],
vector(arrow.x, arrow.y),
),
offset,
);
const startElement =
arrow.startBinding &&
@ -275,7 +288,10 @@ export const mutateElbowArrow = (
);
if (path) {
const points = path.map((node) => [node.pos[0], node.pos[1]]) as Point[];
const points = path.map((node) => [
node.pos[0],
node.pos[1],
]) as GlobalPoint[];
startDongle && points.unshift(startGlobalPoint);
endDongle && points.push(endGlobalPoint);
@ -284,7 +300,7 @@ export const mutateElbowArrow = (
{
...otherUpdates,
...normalizedArrowElementUpdate(simplifyElbowArrowPoints(points), 0, 0),
angle: 0,
angle: 0 as Radians,
},
options?.informMutation,
);
@ -363,7 +379,7 @@ const astar = (
}
// Intersect
const neighborHalfPoint = scalePointFromOrigin(
const neighborHalfPoint = pointScaleFromOrigin(
neighbor.pos,
current.pos,
0.5,
@ -380,17 +396,17 @@ const astar = (
// We need to check if the path we have arrived at this neighbor is the shortest one we have seen yet.
const neighborHeading = neighborIndexToHeading(i as 0 | 1 | 2 | 3);
const previousDirection = current.parent
? vectorToHeading(pointToVector(current.pos, current.parent.pos))
? vectorToHeading(vectorFromPoint(current.pos, current.parent.pos))
: startHeading;
// Do not allow going in reverse
const reverseHeading = scaleVector(previousDirection, -1);
const reverseHeading = flipHeading(previousDirection);
const neighborIsReverseRoute =
arePointsEqual(reverseHeading, neighborHeading) ||
(arePointsEqual(start.addr, neighbor.addr) &&
arePointsEqual(neighborHeading, startHeading)) ||
(arePointsEqual(end.addr, neighbor.addr) &&
arePointsEqual(neighborHeading, endHeading));
compareHeading(reverseHeading, neighborHeading) ||
(gridAddressesEqual(start.addr, neighbor.addr) &&
compareHeading(neighborHeading, startHeading)) ||
(gridAddressesEqual(end.addr, neighbor.addr) &&
compareHeading(neighborHeading, endHeading));
if (neighborIsReverseRoute) {
continue;
}
@ -444,7 +460,7 @@ const pathTo = (start: Node, node: Node) => {
return path;
};
const m_dist = (a: Point, b: Point) =>
const m_dist = (a: GlobalPoint | LocalPoint, b: GlobalPoint | LocalPoint) =>
Math.abs(a[0] - b[0]) + Math.abs(a[1] - b[1]);
/**
@ -541,7 +557,12 @@ const generateDynamicAABBs = (
const cX = first[2] + (second[0] - first[2]) / 2;
const cY = second[3] + (first[1] - second[3]) / 2;
if (cross([a[2], a[1]], [a[0], a[3]], [endCenterX, endCenterY]) > 0) {
if (
vectorCross(
vector(a[2] - endCenterX, a[1] - endCenterY),
vector(a[0] - endCenterX, a[3] - endCenterY),
) > 0
) {
return [
[first[0], first[1], cX, first[3]],
[cX, second[1], second[2], second[3]],
@ -557,7 +578,12 @@ const generateDynamicAABBs = (
const cX = first[2] + (second[0] - first[2]) / 2;
const cY = first[3] + (second[1] - first[3]) / 2;
if (cross([a[0], a[1]], [a[2], a[3]], [endCenterX, endCenterY]) > 0) {
if (
vectorCross(
vector(a[0] - endCenterX, a[1] - endCenterY),
vector(a[2] - endCenterX, a[3] - endCenterY),
) > 0
) {
return [
[first[0], first[1], first[2], cY],
[second[0], cY, second[2], second[3]],
@ -573,7 +599,12 @@ const generateDynamicAABBs = (
const cX = second[2] + (first[0] - second[2]) / 2;
const cY = first[3] + (second[1] - first[3]) / 2;
if (cross([a[2], a[1]], [a[0], a[3]], [endCenterX, endCenterY]) > 0) {
if (
vectorCross(
vector(a[2] - endCenterX, a[1] - endCenterY),
vector(a[0] - endCenterX, a[3] - endCenterY),
) > 0
) {
return [
[cX, first[1], first[2], first[3]],
[second[0], second[1], cX, second[3]],
@ -589,7 +620,12 @@ const generateDynamicAABBs = (
const cX = second[2] + (first[0] - second[2]) / 2;
const cY = second[3] + (first[1] - second[3]) / 2;
if (cross([a[0], a[1]], [a[2], a[3]], [endCenterX, endCenterY]) > 0) {
if (
vectorCross(
vector(a[0] - endCenterX, a[1] - endCenterY),
vector(a[2] - endCenterX, a[3] - endCenterY),
) > 0
) {
return [
[cX, first[1], first[2], first[3]],
[second[0], second[1], cX, second[3]],
@ -615,9 +651,9 @@ const generateDynamicAABBs = (
*/
const calculateGrid = (
aabbs: Bounds[],
start: Point,
start: GlobalPoint,
startHeading: Heading,
end: Point,
end: GlobalPoint,
endHeading: Heading,
common: Bounds,
): Grid => {
@ -662,8 +698,8 @@ const calculateGrid = (
closed: false,
visited: false,
parent: null,
addr: [col, row] as [number, number],
pos: [x, y] as Point,
addr: [col, row] as GridAddress,
pos: [x, y] as GlobalPoint,
}),
),
),
@ -673,17 +709,17 @@ const calculateGrid = (
const getDonglePosition = (
bounds: Bounds,
heading: Heading,
point: Point,
): Point => {
p: GlobalPoint,
): GlobalPoint => {
switch (heading) {
case HEADING_UP:
return [point[0], bounds[1]];
return point(p[0], bounds[1]);
case HEADING_RIGHT:
return [bounds[2], point[1]];
return point(bounds[2], p[1]);
case HEADING_DOWN:
return [point[0], bounds[3]];
return point(p[0], bounds[3]);
}
return [bounds[0], point[1]];
return point(bounds[0], p[1]);
};
const estimateSegmentCount = (
@ -826,7 +862,7 @@ const gridNodeFromAddr = (
/**
* Get node for global point on canvas (if exists)
*/
const pointToGridNode = (point: Point, grid: Grid): Node | null => {
const pointToGridNode = (point: GlobalPoint, grid: Grid): Node | null => {
for (let col = 0; col < grid.col; col++) {
for (let row = 0; row < grid.row; row++) {
const candidate = gridNodeFromAddr([col, row], grid);
@ -865,15 +901,24 @@ const getBindableElementForId = (
};
const normalizedArrowElementUpdate = (
global: Point[],
global: GlobalPoint[],
externalOffsetX?: number,
externalOffsetY?: number,
) => {
): {
points: LocalPoint[];
x: number;
y: number;
width: number;
height: number;
} => {
const offsetX = global[0][0];
const offsetY = global[0][1];
const points = global.map(
(point) => [point[0] - offsetX, point[1] - offsetY] as const,
const points = global.map((p) =>
pointTranslate<GlobalPoint, LocalPoint>(
p,
vectorScale(vectorFromPoint(global[0]), -1),
),
);
return {
@ -885,19 +930,22 @@ const normalizedArrowElementUpdate = (
};
/// If last and current segments have the same heading, skip the middle point
const simplifyElbowArrowPoints = (points: Point[]): Point[] =>
const simplifyElbowArrowPoints = (points: GlobalPoint[]): GlobalPoint[] =>
points
.slice(2)
.reduce(
(result, point) =>
arePointsEqual(
(result, p) =>
compareHeading(
vectorToHeading(
pointToVector(result[result.length - 1], result[result.length - 2]),
vectorFromPoint(
result[result.length - 1],
result[result.length - 2],
),
vectorToHeading(pointToVector(point, result[result.length - 1])),
),
vectorToHeading(vectorFromPoint(p, result[result.length - 1])),
)
? [...result.slice(0, -1), point]
: [...result, point],
? [...result.slice(0, -1), p]
: [...result, p],
[points[0] ?? [0, 0], points[1] ?? [1, 0]],
);
@ -915,13 +963,13 @@ const neighborIndexToHeading = (idx: number): Heading => {
const getGlobalPoint = (
fixedPointRatio: [number, number] | undefined | null,
initialPoint: Point,
otherPoint: Point,
initialPoint: GlobalPoint,
otherPoint: GlobalPoint,
elementsMap: NonDeletedSceneElementsMap | SceneElementsMap,
boundElement?: ExcalidrawBindableElement | null,
hoveredElement?: ExcalidrawBindableElement | null,
isDragging?: boolean,
): Point => {
): GlobalPoint => {
if (isDragging) {
if (hoveredElement) {
const snapPoint = getSnapPoint(
@ -956,36 +1004,34 @@ const getGlobalPoint = (
};
const getSnapPoint = (
point: Point,
otherPoint: Point,
p: GlobalPoint,
otherPoint: GlobalPoint,
element: ExcalidrawBindableElement,
elementsMap: ElementsMap,
) =>
bindPointToSnapToElementOutline(
isRectanguloidElement(element)
? avoidRectangularCorner(element, point)
: point,
isRectanguloidElement(element) ? avoidRectangularCorner(element, p) : p,
otherPoint,
element,
elementsMap,
);
const getBindPointHeading = (
point: Point,
otherPoint: Point,
p: GlobalPoint,
otherPoint: GlobalPoint,
elementsMap: NonDeletedSceneElementsMap | SceneElementsMap,
hoveredElement: ExcalidrawBindableElement | null | undefined,
origPoint: Point,
origPoint: GlobalPoint,
) =>
getHeadingForElbowArrowSnap(
point,
p,
otherPoint,
hoveredElement,
hoveredElement &&
aabbForElement(
hoveredElement,
Array(4).fill(
distanceToBindableElement(hoveredElement, point, elementsMap),
distanceToBindableElement(hoveredElement, p, elementsMap),
) as [number, number, number, number],
),
elementsMap,
@ -993,8 +1039,8 @@ const getBindPointHeading = (
);
const getHoveredElements = (
origStartGlobalPoint: Point,
origEndGlobalPoint: Point,
origStartGlobalPoint: GlobalPoint,
origEndGlobalPoint: GlobalPoint,
elementsMap: NonDeletedSceneElementsMap | SceneElementsMap,
) => {
// TODO: Might be a performance bottleneck and the Map type
@ -1018,3 +1064,6 @@ const getHoveredElements = (
),
];
};
const gridAddressesEqual = (a: GridAddress, b: GridAddress): boolean =>
a[0] === b[0] && a[1] === b[1];

6
packages/excalidraw/element/textWysiwyg.test.tsx
View File

@ -19,6 +19,7 @@ import type {
import { API } from "../tests/helpers/api";
import { getOriginalContainerHeightFromCache } from "./containerCache";
import { getTextEditor, updateTextEditor } from "../tests/queries/dom";
import { point } from "../../math";
// Unmount ReactDOM from root
ReactDOM.unmountComponentAtNode(document.getElementById("root")!);
@ -41,10 +42,7 @@ describe("textWysiwyg", () => {
type: "line",
width: 100,
height: 0,
points: [
[0, 0],
[100, 0],
],
points: [point(0, 0), point(100, 0)],
});
const textSize = 20;
const text = API.createElement({

13
packages/excalidraw/element/transformHandles.ts
View File

@ -7,7 +7,6 @@ import type {
import type { Bounds } from "./bounds";
import { getElementAbsoluteCoords } from "./bounds";
import { rotate } from "../math";
import type { Device, InteractiveCanvasAppState, Zoom } from "../types";
import {
isElbowArrow,
@ -19,6 +18,8 @@ import {
isAndroid,
isIOS,
} from "../constants";
import type { Radians } from "../../math";
import { point, pointRotateRads } from "../../math";
export type TransformHandleDirection =
| "n"
@ -91,9 +92,13 @@ const generateTransformHandle = (
height: number,
cx: number,
cy: number,
angle: number,
angle: Radians,
): TransformHandle => {
const [xx, yy] = rotate(x + width / 2, y + height / 2, cx, cy, angle);
const [xx, yy] = pointRotateRads(
point(x + width / 2, y + height / 2),
point(cx, cy),
angle,
);
return [xx - width / 2, yy - height / 2, width, height];
};
@ -119,7 +124,7 @@ export const getOmitSidesForDevice = (device: Device) => {
export const getTransformHandlesFromCoords = (
[x1, y1, x2, y2, cx, cy]: [number, number, number, number, number, number],
angle: number,
angle: Radians,
zoom: Zoom,
pointerType: PointerType,
omitSides: { [T in TransformHandleType]?: boolean } = {},

17
packages/excalidraw/element/typeChecks.ts
View File

@ -1,6 +1,5 @@
import type { LineSegment } from "../../utils";
import { ROUNDNESS } from "../constants";
import type { ElementOrToolType, Point } from "../types";
import type { ElementOrToolType } from "../types";
import type { MarkNonNullable } from "../utility-types";
import { assertNever } from "../utils";
import type { Bounds } from "./bounds";
@ -191,7 +190,8 @@ export const isRectangularElement = (
element.type === "iframe" ||
element.type === "embeddable" ||
element.type === "frame" ||
element.type === "magicframe")
element.type === "magicframe" ||
element.type === "freedraw")
);
};
@ -325,10 +325,6 @@ export const isFixedPointBinding = (
return binding.fixedPoint != null;
};
// TODO: Move this to @excalidraw/math
export const isPoint = (point: unknown): point is Point =>
Array.isArray(point) && point.length === 2;
// TODO: Move this to @excalidraw/math
export const isBounds = (box: unknown): box is Bounds =>
Array.isArray(box) &&
@ -337,10 +333,3 @@ export const isBounds = (box: unknown): box is Bounds =>
typeof box[1] === "number" &&
typeof box[2] === "number" &&
typeof box[3] === "number";
// TODO: Move this to @excalidraw/math
export const isLineSegment = (segment: unknown): segment is LineSegment =>
Array.isArray(segment) &&
segment.length === 2 &&
isPoint(segment[0]) &&
isPoint(segment[0]);

21
packages/excalidraw/element/types.ts
View File

@ -1,4 +1,4 @@
import type { Point } from "../types";
import type { LocalPoint, Radians } from "../../math";
import type {
FONT_FAMILY,
ROUNDNESS,
@ -49,7 +49,7 @@ type _ExcalidrawElementBase = Readonly<{
opacity: number;
width: number;
height: number;
angle: number;
angle: Radians;
/** Random integer used to seed shape generation so that the roughjs shape
doesn't differ across renders. */
seed: number;
@ -175,6 +175,15 @@ export type ExcalidrawFlowchartNodeElement =
| ExcalidrawDiamondElement
| ExcalidrawEllipseElement;
export type ExcalidrawRectanguloidElement =
| ExcalidrawRectangleElement
| ExcalidrawImageElement
| ExcalidrawTextElement
| ExcalidrawFreeDrawElement
| ExcalidrawIframeLikeElement
| ExcalidrawFrameLikeElement
| ExcalidrawEmbeddableElement;
/**
* ExcalidrawElement should be JSON serializable and (eventually) contain
* no computed data. The list of all ExcalidrawElements should be shareable
@ -283,8 +292,8 @@ export type Arrowhead =
export type ExcalidrawLinearElement = _ExcalidrawElementBase &
Readonly<{
type: "line" | "arrow";
points: readonly Point[];
lastCommittedPoint: Point | null;
points: readonly LocalPoint[];
lastCommittedPoint: LocalPoint | null;
startBinding: PointBinding | null;
endBinding: PointBinding | null;
startArrowhead: Arrowhead | null;
@ -309,10 +318,10 @@ export type ExcalidrawElbowArrowElement = Merge<
export type ExcalidrawFreeDrawElement = _ExcalidrawElementBase &
Readonly<{
type: "freedraw";
points: readonly Point[];
points: readonly LocalPoint[];
pressures: readonly number[];
simulatePressure: boolean;
lastCommittedPoint: Point | null;
lastCommittedPoint: LocalPoint | null;
}>;
export type FileId = string & { _brand: "FileId" };

8
packages/excalidraw/frame.ts
View File

@ -11,7 +11,6 @@ import type {
NonDeleted,
NonDeletedExcalidrawElement,
} from "./element/types";
import { isPointWithinBounds } from "./math";
import {
getBoundTextElement,
getContainerElement,
@ -30,6 +29,7 @@ import { getElementLineSegments } from "./element/bounds";
import { doLineSegmentsIntersect, elementsOverlappingBBox } from "../utils/";
import { isFrameElement, isFrameLikeElement } from "./element/typeChecks";
import type { ReadonlySetLike } from "./utility-types";
import { isPointWithinBounds, point } from "../math";
// --------------------------- Frame State ------------------------------------
export const bindElementsToFramesAfterDuplication = (
@ -159,9 +159,9 @@ export const isCursorInFrame = (
const [fx1, fy1, fx2, fy2] = getElementAbsoluteCoords(frame, elementsMap);
return isPointWithinBounds(
[fx1, fy1],
[cursorCoords.x, cursorCoords.y],
[fx2, fy2],
point(fx1, fy1),
point(cursorCoords.x, cursorCoords.y),
point(fx2, fy2),
);
};

99
packages/excalidraw/math.test.ts
View File

@ -1,99 +0,0 @@
import {
isPointOnSymmetricArc,
rangeIntersection,
rangesOverlap,
rotate,
} from "./math";
describe("rotate", () => {
it("should rotate over (x2, y2) and return the rotated coordinates for (x1, y1)", () => {
const x1 = 10;
const y1 = 20;
const x2 = 20;
const y2 = 30;
const angle = Math.PI / 2;
const [rotatedX, rotatedY] = rotate(x1, y1, x2, y2, angle);
expect([rotatedX, rotatedY]).toEqual([30, 20]);
const res2 = rotate(rotatedX, rotatedY, x2, y2, -angle);
expect(res2).toEqual([x1, x2]);
});
});
describe("range overlap", () => {
it("should overlap when range a contains range b", () => {
expect(rangesOverlap([1, 4], [2, 3])).toBe(true);
expect(rangesOverlap([1, 4], [1, 4])).toBe(true);
expect(rangesOverlap([1, 4], [1, 3])).toBe(true);
expect(rangesOverlap([1, 4], [2, 4])).toBe(true);
});
it("should overlap when range b contains range a", () => {
expect(rangesOverlap([2, 3], [1, 4])).toBe(true);
expect(rangesOverlap([1, 3], [1, 4])).toBe(true);
expect(rangesOverlap([2, 4], [1, 4])).toBe(true);
});
it("should overlap when range a and b intersect", () => {
expect(rangesOverlap([1, 4], [2, 5])).toBe(true);
});
});
describe("range intersection", () => {
it("should intersect completely with itself", () => {
expect(rangeIntersection([1, 4], [1, 4])).toEqual([1, 4]);
});
it("should intersect irrespective of order", () => {
expect(rangeIntersection([1, 4], [2, 3])).toEqual([2, 3]);
expect(rangeIntersection([2, 3], [1, 4])).toEqual([2, 3]);
expect(rangeIntersection([1, 4], [3, 5])).toEqual([3, 4]);
expect(rangeIntersection([3, 5], [1, 4])).toEqual([3, 4]);
});
it("should intersect at the edge", () => {
expect(rangeIntersection([1, 4], [4, 5])).toEqual([4, 4]);
});
it("should not intersect", () => {
expect(rangeIntersection([1, 4], [5, 7])).toEqual(null);
});
});
describe("point on arc", () => {
it("should detect point on simple arc", () => {
expect(
isPointOnSymmetricArc(
{
radius: 1,
startAngle: -Math.PI / 4,
endAngle: Math.PI / 4,
},
[0.92291667, 0.385],
),
).toBe(true);
});
it("should not detect point outside of a simple arc", () => {
expect(
isPointOnSymmetricArc(
{
radius: 1,
startAngle: -Math.PI / 4,
endAngle: Math.PI / 4,
},
[-0.92291667, 0.385],
),
).toBe(false);
});
it("should not detect point with good angle but incorrect radius", () => {
expect(
isPointOnSymmetricArc(
{
radius: 1,
startAngle: -Math.PI / 4,
endAngle: Math.PI / 4,
},
[-0.5, 0.5],
),
).toBe(false);
});
});

715
packages/excalidraw/math.ts
View File

@ -1,715 +0,0 @@
import type {
NormalizedZoomValue,
NullableGridSize,
Point,
Zoom,
} from "./types";
import {
DEFAULT_ADAPTIVE_RADIUS,
LINE_CONFIRM_THRESHOLD,
DEFAULT_PROPORTIONAL_RADIUS,
ROUNDNESS,
} from "./constants";
import type {
ExcalidrawElement,
ExcalidrawLinearElement,
NonDeleted,
} from "./element/types";
import type { Bounds } from "./element/bounds";
import { getCurvePathOps } from "./element/bounds";
import type { Mutable } from "./utility-types";
import { ShapeCache } from "./scene/ShapeCache";
import type { Vector } from "../utils/geometry/shape";
export const rotate = (
// target point to rotate
x: number,
y: number,
// point to rotate against
cx: number,
cy: number,
angle: number,
): [number, number] =>
// 𝑎′𝑥=(𝑎𝑥−𝑐𝑥)cos𝜃−(𝑎𝑦−𝑐𝑦)sin𝜃+𝑐𝑥
// 𝑎′𝑦=(𝑎𝑥−𝑐𝑥)sin𝜃+(𝑎𝑦−𝑐𝑦)cos𝜃+𝑐𝑦.
// https://math.stackexchange.com/questions/2204520/how-do-i-rotate-a-line-segment-in-a-specific-point-on-the-line
[
(x - cx) * Math.cos(angle) - (y - cy) * Math.sin(angle) + cx,
(x - cx) * Math.sin(angle) + (y - cy) * Math.cos(angle) + cy,
];
export const rotatePoint = (
point: Point,
center: Point,
angle: number,
): [number, number] => rotate(point[0], point[1], center[0], center[1], angle);
export const adjustXYWithRotation = (
sides: {
n?: boolean;
e?: boolean;
s?: boolean;
w?: boolean;
},
x: number,
y: number,
angle: number,
deltaX1: number,
deltaY1: number,
deltaX2: number,
deltaY2: number,
): [number, number] => {
const cos = Math.cos(angle);
const sin = Math.sin(angle);
if (sides.e && sides.w) {
x += deltaX1 + deltaX2;
} else if (sides.e) {
x += deltaX1 * (1 + cos);
y += deltaX1 * sin;
x += deltaX2 * (1 - cos);
y += deltaX2 * -sin;
} else if (sides.w) {
x += deltaX1 * (1 - cos);
y += deltaX1 * -sin;
x += deltaX2 * (1 + cos);
y += deltaX2 * sin;
}
if (sides.n && sides.s) {
y += deltaY1 + deltaY2;
} else if (sides.n) {
x += deltaY1 * sin;
y += deltaY1 * (1 - cos);
x += deltaY2 * -sin;
y += deltaY2 * (1 + cos);
} else if (sides.s) {
x += deltaY1 * -sin;
y += deltaY1 * (1 + cos);
x += deltaY2 * sin;
y += deltaY2 * (1 - cos);
}
return [x, y];
};
export const getPointOnAPath = (point: Point, path: Point[]) => {
const [px, py] = point;
const [start, ...other] = path;
let [lastX, lastY] = start;
let kLine: number = 0;
let idx: number = 0;
// if any item in the array is true, it means that a point is
// on some segment of a line based path
const retVal = other.some(([x2, y2], i) => {
// we always take a line when dealing with line segments
const x1 = lastX;
const y1 = lastY;
lastX = x2;
lastY = y2;
// if a point is not within the domain of the line segment
// it is not on the line segment
if (px < x1 || px > x2) {
return false;
}
// check if all points lie on the same line
// y1 = kx1 + b, y2 = kx2 + b
// y2 - y1 = k(x2 - x2) -> k = (y2 - y1) / (x2 - x1)
// coefficient for the line (p0, p1)
const kL = (y2 - y1) / (x2 - x1);
// coefficient for the line segment (p0, point)
const kP1 = (py - y1) / (px - x1);
// coefficient for the line segment (point, p1)
const kP2 = (py - y2) / (px - x2);
// because we are basing both lines from the same starting point
// the only option for collinearity is having same coefficients
// using it for floating point comparisons
const epsilon = 0.3;
// if coefficient is more than an arbitrary epsilon,
// these lines are nor collinear
if (Math.abs(kP1 - kL) > epsilon && Math.abs(kP2 - kL) > epsilon) {
return false;
}
// store the coefficient because we are goint to need it
kLine = kL;
idx = i;
return true;
});
// Return a coordinate that is always on the line segment
if (retVal === true) {
return { x: point[0], y: kLine * point[0], segment: idx };
}
return null;
};
export const distance2d = (x1: number, y1: number, x2: number, y2: number) => {
const xd = x2 - x1;
const yd = y2 - y1;
return Math.hypot(xd, yd);
};
export const distanceSq2d = (p1: Point, p2: Point) => {
const xd = p2[0] - p1[0];
const yd = p2[1] - p1[1];
return xd * xd + yd * yd;
};
export const centerPoint = (a: Point, b: Point): Point => {
return [(a[0] + b[0]) / 2, (a[1] + b[1]) / 2];
};
// Checks if the first and last point are close enough
// to be considered a loop
export const isPathALoop = (
points: ExcalidrawLinearElement["points"],
/** supply if you want the loop detection to account for current zoom */
zoomValue: Zoom["value"] = 1 as NormalizedZoomValue,
): boolean => {
if (points.length >= 3) {
const [first, last] = [points[0], points[points.length - 1]];
const distance = distance2d(first[0], first[1], last[0], last[1]);
// Adjusting LINE_CONFIRM_THRESHOLD to current zoom so that when zoomed in
// really close we make the threshold smaller, and vice versa.
return distance <= LINE_CONFIRM_THRESHOLD / zoomValue;
}
return false;
};
// Draw a line from the point to the right till infiinty
// Check how many lines of the polygon does this infinite line intersects with
// If the number of intersections is odd, point is in the polygon
export const isPointInPolygon = (
points: Point[],
x: number,
y: number,
): boolean => {
const vertices = points.length;
// There must be at least 3 vertices in polygon
if (vertices < 3) {
return false;
}
const extreme: Point = [Number.MAX_SAFE_INTEGER, y];
const p: Point = [x, y];
let count = 0;
for (let i = 0; i < vertices; i++) {
const current = points[i];
const next = points[(i + 1) % vertices];
if (doSegmentsIntersect(current, next, p, extreme)) {
if (orderedColinearOrientation(current, p, next) === 0) {
return isPointWithinBounds(current, p, next);
}
count++;
}
}
// true if count is off
return count % 2 === 1;
};
// Returns whether `q` lies inside the segment/rectangle defined by `p` and `r`.
// This is an approximation to "does `q` lie on a segment `pr`" check.
export const isPointWithinBounds = (p: Point, q: Point, r: Point) => {
return (
q[0] <= Math.max(p[0], r[0]) &&
q[0] >= Math.min(p[0], r[0]) &&
q[1] <= Math.max(p[1], r[1]) &&
q[1] >= Math.min(p[1], r[1])
);
};
// For the ordered points p, q, r, return
// 0 if p, q, r are colinear
// 1 if Clockwise
// 2 if counterclickwise
const orderedColinearOrientation = (p: Point, q: Point, r: Point) => {
const val = (q[1] - p[1]) * (r[0] - q[0]) - (q[0] - p[0]) * (r[1] - q[1]);
if (val === 0) {
return 0;
}
return val > 0 ? 1 : 2;
};
// Check is p1q1 intersects with p2q2
const doSegmentsIntersect = (p1: Point, q1: Point, p2: Point, q2: Point) => {
const o1 = orderedColinearOrientation(p1, q1, p2);
const o2 = orderedColinearOrientation(p1, q1, q2);
const o3 = orderedColinearOrientation(p2, q2, p1);
const o4 = orderedColinearOrientation(p2, q2, q1);
if (o1 !== o2 && o3 !== o4) {
return true;
}
// p1, q1 and p2 are colinear and p2 lies on segment p1q1
if (o1 === 0 && isPointWithinBounds(p1, p2, q1)) {
return true;
}
// p1, q1 and p2 are colinear and q2 lies on segment p1q1
if (o2 === 0 && isPointWithinBounds(p1, q2, q1)) {
return true;
}
// p2, q2 and p1 are colinear and p1 lies on segment p2q2
if (o3 === 0 && isPointWithinBounds(p2, p1, q2)) {
return true;
}
// p2, q2 and q1 are colinear and q1 lies on segment p2q2
if (o4 === 0 && isPointWithinBounds(p2, q1, q2)) {
return true;
}
return false;
};
// TODO: Rounding this point causes some shake when free drawing
export const getGridPoint = (
x: number,
y: number,
gridSize: NullableGridSize,
): [number, number] => {
if (gridSize) {
return [
Math.round(x / gridSize) * gridSize,
Math.round(y / gridSize) * gridSize,
];
}
return [x, y];
};
export const getCornerRadius = (x: number, element: ExcalidrawElement) => {
if (
element.roundness?.type === ROUNDNESS.PROPORTIONAL_RADIUS ||
element.roundness?.type === ROUNDNESS.LEGACY
) {
return x * DEFAULT_PROPORTIONAL_RADIUS;
}
if (element.roundness?.type === ROUNDNESS.ADAPTIVE_RADIUS) {
const fixedRadiusSize = element.roundness?.value ?? DEFAULT_ADAPTIVE_RADIUS;
const CUTOFF_SIZE = fixedRadiusSize / DEFAULT_PROPORTIONAL_RADIUS;
if (x <= CUTOFF_SIZE) {
return x * DEFAULT_PROPORTIONAL_RADIUS;
}
return fixedRadiusSize;
}
return 0;
};
export const getControlPointsForBezierCurve = (
element: NonDeleted<ExcalidrawLinearElement>,
endPoint: Point,
) => {
const shape = ShapeCache.generateElementShape(element, null);
if (!shape) {
return null;
}
const ops = getCurvePathOps(shape[0]);
let currentP: Mutable<Point> = [0, 0];
let index = 0;
let minDistance = Infinity;
let controlPoints: Mutable<Point>[] | null = null;
while (index < ops.length) {
const { op, data } = ops[index];
if (op === "move") {
currentP = data as unknown as Mutable<Point>;
}
if (op === "bcurveTo") {
const p0 = currentP;
const p1 = [data[0], data[1]] as Mutable<Point>;
const p2 = [data[2], data[3]] as Mutable<Point>;
const p3 = [data[4], data[5]] as Mutable<Point>;
const distance = distance2d(p3[0], p3[1], endPoint[0], endPoint[1]);
if (distance < minDistance) {
minDistance = distance;
controlPoints = [p0, p1, p2, p3];
}
currentP = p3;
}
index++;
}
return controlPoints;
};
export const getBezierXY = (
p0: Point,
p1: Point,
p2: Point,
p3: Point,
t: number,
) => {
const equation = (t: number, idx: number) =>
Math.pow(1 - t, 3) * p3[idx] +
3 * t * Math.pow(1 - t, 2) * p2[idx] +
3 * Math.pow(t, 2) * (1 - t) * p1[idx] +
p0[idx] * Math.pow(t, 3);
const tx = equation(t, 0);
const ty = equation(t, 1);
return [tx, ty];
};
export const getPointsInBezierCurve = (
element: NonDeleted<ExcalidrawLinearElement>,
endPoint: Point,
) => {
const controlPoints: Mutable<Point>[] = getControlPointsForBezierCurve(
element,
endPoint,
)!;
if (!controlPoints) {
return [];
}
const pointsOnCurve: Mutable<Point>[] = [];
let t = 1;
// Take 20 points on curve for better accuracy
while (t > 0) {
const point = getBezierXY(
controlPoints[0],
controlPoints[1],
controlPoints[2],
controlPoints[3],
t,
);
pointsOnCurve.push([point[0], point[1]]);
t -= 0.05;
}
if (pointsOnCurve.length) {
if (arePointsEqual(pointsOnCurve.at(-1)!, endPoint)) {
pointsOnCurve.push([endPoint[0], endPoint[1]]);
}
}
return pointsOnCurve;
};
export const getBezierCurveArcLengths = (
element: NonDeleted<ExcalidrawLinearElement>,
endPoint: Point,
) => {
const arcLengths: number[] = [];
arcLengths[0] = 0;
const points = getPointsInBezierCurve(element, endPoint);
let index = 0;
let distance = 0;
while (index < points.length - 1) {
const segmentDistance = distance2d(
points[index][0],
points[index][1],
points[index + 1][0],
points[index + 1][1],
);
distance += segmentDistance;
arcLengths.push(distance);
index++;
}
return arcLengths;
};
export const getBezierCurveLength = (
element: NonDeleted<ExcalidrawLinearElement>,
endPoint: Point,
) => {
const arcLengths = getBezierCurveArcLengths(element, endPoint);
return arcLengths.at(-1) as number;
};
// This maps interval to actual interval t on the curve so that when t = 0.5, its actually the point at 50% of the length
export const mapIntervalToBezierT = (
element: NonDeleted<ExcalidrawLinearElement>,
endPoint: Point,
interval: number, // The interval between 0 to 1 for which you want to find the point on the curve,
) => {
const arcLengths = getBezierCurveArcLengths(element, endPoint);
const pointsCount = arcLengths.length - 1;
const curveLength = arcLengths.at(-1) as number;
const targetLength = interval * curveLength;
let low = 0;
let high = pointsCount;
let index = 0;
// Doing a binary search to find the largest length that is less than the target length
while (low < high) {
index = Math.floor(low + (high - low) / 2);
if (arcLengths[index] < targetLength) {
low = index + 1;
} else {
high = index;
}
}
if (arcLengths[index] > targetLength) {
index--;
}
if (arcLengths[index] === targetLength) {
return index / pointsCount;
}
return (
1 -
(index +
(targetLength - arcLengths[index]) /
(arcLengths[index + 1] - arcLengths[index])) /
pointsCount
);
};
export const arePointsEqual = (p1: Point, p2: Point) => {
return p1[0] === p2[0] && p1[1] === p2[1];
};
export const isRightAngle = (angle: number) => {
// if our angles were mathematically accurate, we could just check
//
// angle % (Math.PI / 2) === 0
//
// but since we're in floating point land, we need to round.
//
// Below, after dividing by Math.PI, a multiple of 0.5 indicates a right
// angle, which we can check with modulo after rounding.
return Math.round((angle / Math.PI) * 10000) % 5000 === 0;
};
export const radianToDegree = (r: number) => {
return (r * 180) / Math.PI;
};
export const degreeToRadian = (d: number) => {
return (d / 180) * Math.PI;
};
// Given two ranges, return if the two ranges overlap with each other
// e.g. [1, 3] overlaps with [2, 4] while [1, 3] does not overlap with [4, 5]
export const rangesOverlap = (
[a0, a1]: [number, number],
[b0, b1]: [number, number],
) => {
if (a0 <= b0) {
return a1 >= b0;
}
if (a0 >= b0) {
return b1 >= a0;
}
return false;
};
// Given two ranges,return ther intersection of the two ranges if any
// e.g. the intersection of [1, 3] and [2, 4] is [2, 3]
export const rangeIntersection = (
rangeA: [number, number],
rangeB: [number, number],
): [number, number] | null => {
const rangeStart = Math.max(rangeA[0], rangeB[0]);
const rangeEnd = Math.min(rangeA[1], rangeB[1]);
if (rangeStart <= rangeEnd) {
return [rangeStart, rangeEnd];
}
return null;
};
export const isValueInRange = (value: number, min: number, max: number) => {
return value >= min && value <= max;
};
export const translatePoint = (p: Point, v: Vector): Point => [
p[0] + v[0],
p[1] + v[1],
];
export const scaleVector = (v: Vector, scalar: number): Vector => [
v[0] * scalar,
v[1] * scalar,
];
export const pointToVector = (p: Point, origin: Point = [0, 0]): Vector => [
p[0] - origin[0],
p[1] - origin[1],
];
export const scalePointFromOrigin = (
p: Point,
mid: Point,
multiplier: number,
) => translatePoint(mid, scaleVector(pointToVector(p, mid), multiplier));
const triangleSign = (p1: Point, p2: Point, p3: Point): number =>
(p1[0] - p3[0]) * (p2[1] - p3[1]) - (p2[0] - p3[0]) * (p1[1] - p3[1]);
export const PointInTriangle = (pt: Point, v1: Point, v2: Point, v3: Point) => {
const d1 = triangleSign(pt, v1, v2);
const d2 = triangleSign(pt, v2, v3);
const d3 = triangleSign(pt, v3, v1);
const has_neg = d1 < 0 || d2 < 0 || d3 < 0;
const has_pos = d1 > 0 || d2 > 0 || d3 > 0;
return !(has_neg && has_pos);
};
export const magnitudeSq = (vector: Vector) =>
vector[0] * vector[0] + vector[1] * vector[1];
export const magnitude = (vector: Vector) => Math.sqrt(magnitudeSq(vector));
export const normalize = (vector: Vector): Vector => {
const m = magnitude(vector);
return [vector[0] / m, vector[1] / m];
};
export const addVectors = (
vec1: Readonly<Vector>,
vec2: Readonly<Vector>,
): Vector => [vec1[0] + vec2[0], vec1[1] + vec2[1]];
export const subtractVectors = (
vec1: Readonly<Vector>,
vec2: Readonly<Vector>,
): Vector => [vec1[0] - vec2[0], vec1[1] - vec2[1]];
export const pointInsideBounds = (p: Point, bounds: Bounds): boolean =>
p[0] > bounds[0] && p[0] < bounds[2] && p[1] > bounds[1] && p[1] < bounds[3];
/**
* Get the axis-aligned bounding box for a given element
*/
export const aabbForElement = (
element: Readonly<ExcalidrawElement>,
offset?: [number, number, number, number],
) => {
const bbox = {
minX: element.x,
minY: element.y,
maxX: element.x + element.width,
maxY: element.y + element.height,
midX: element.x + element.width / 2,
midY: element.y + element.height / 2,
};
const center = [bbox.midX, bbox.midY] as Point;
const [topLeftX, topLeftY] = rotatePoint(
[bbox.minX, bbox.minY],
center,
element.angle,
);
const [topRightX, topRightY] = rotatePoint(
[bbox.maxX, bbox.minY],
center,
element.angle,
);
const [bottomRightX, bottomRightY] = rotatePoint(
[bbox.maxX, bbox.maxY],
center,
element.angle,
);
const [bottomLeftX, bottomLeftY] = rotatePoint(
[bbox.minX, bbox.maxY],
center,
element.angle,
);
const bounds = [
Math.min(topLeftX, topRightX, bottomRightX, bottomLeftX),
Math.min(topLeftY, topRightY, bottomRightY, bottomLeftY),
Math.max(topLeftX, topRightX, bottomRightX, bottomLeftX),
Math.max(topLeftY, topRightY, bottomRightY, bottomLeftY),
] as Bounds;
if (offset) {
const [topOffset, rightOffset, downOffset, leftOffset] = offset;
return [
bounds[0] - leftOffset,
bounds[1] - topOffset,
bounds[2] + rightOffset,
bounds[3] + downOffset,
] as Bounds;
}
return bounds;
};
type PolarCoords = [number, number];
/**
* Return the polar coordinates for the given carthesian point represented by
* (x, y) for the center point 0,0 where the first number returned is the radius,
* the second is the angle in radians.
*/
export const carthesian2Polar = ([x, y]: Point): PolarCoords => [
Math.hypot(x, y),
Math.atan2(y, x),
];
/**
* Angles are in radians and centered on 0, 0. Zero radians on a 1 radius circle
* corresponds to (1, 0) carthesian coordinates (point), i.e. to the "right".
*/
type SymmetricArc = { radius: number; startAngle: number; endAngle: number };
/**
* Determines if a carthesian point lies on a symmetric arc, i.e. an arc which
* is part of a circle contour centered on 0, 0.
*/
export const isPointOnSymmetricArc = (
{ radius: arcRadius, startAngle, endAngle }: SymmetricArc,
point: Point,
): boolean => {
const [radius, angle] = carthesian2Polar(point);
return startAngle < endAngle
? Math.abs(radius - arcRadius) < 0.0000001 &&
startAngle <= angle &&
endAngle >= angle
: startAngle <= angle || endAngle >= angle;
};
export const getCenterForBounds = (bounds: Bounds): Point => [
bounds[0] + (bounds[2] - bounds[0]) / 2,
bounds[1] + (bounds[3] - bounds[1]) / 2,
];
export const getCenterForElement = (element: ExcalidrawElement): Point => [
element.x + element.width / 2,
element.y + element.height / 2,
];
export const aabbsOverlapping = (a: Bounds, b: Bounds) =>
pointInsideBounds([a[0], a[1]], b) ||
pointInsideBounds([a[2], a[1]], b) ||
pointInsideBounds([a[2], a[3]], b) ||
pointInsideBounds([a[0], a[3]], b) ||
pointInsideBounds([b[0], b[1]], a) ||
pointInsideBounds([b[2], b[1]], a) ||
pointInsideBounds([b[2], b[3]], a) ||
pointInsideBounds([b[0], b[3]], a);
export const clamp = (value: number, min: number, max: number) => {
return Math.min(Math.max(value, min), max);
};
export const round = (value: number, precision: number) => {
const multiplier = Math.pow(10, precision);
return Math.round((value + Number.EPSILON) * multiplier) / multiplier;
};

16
packages/excalidraw/points.ts
View File

@ -1,6 +1,8 @@
import type { Point } from "./types";
import { pointFromPair, type GlobalPoint, type LocalPoint } from "../math";
export const getSizeFromPoints = (points: readonly Point[]) => {
export const getSizeFromPoints = (
points: readonly (GlobalPoint | LocalPoint)[],
) => {
const xs = points.map((point) => point[0]);
const ys = points.map((point) => point[1]);
return {
@ -10,7 +12,7 @@ export const getSizeFromPoints = (points: readonly Point[]) => {
};
/** @arg dimension, 0 for rescaling only x, 1 for y */
export const rescalePoints = (
export const rescalePoints = <Point extends GlobalPoint | LocalPoint>(
dimension: 0 | 1,
newSize: number,
points: readonly Point[],
@ -31,7 +33,7 @@ export const rescalePoints = (
if (newCoordinate < nextMinCoordinate) {
nextMinCoordinate = newCoordinate;
}
return newPoint as unknown as Point;
return newPoint as Point;
});
if (!normalize) {
@ -45,11 +47,13 @@ export const rescalePoints = (
const translation = minCoordinate - nextMinCoordinate;
const nextPoints = scaledPoints.map(
(scaledPoint) =>
const nextPoints = scaledPoints.map((scaledPoint) =>
pointFromPair<Point>(
scaledPoint.map((value, currentDimension) => {
return currentDimension === dimension ? value + translation : value;
}) as [number, number],
),
);
return nextPoints;
};

13
packages/excalidraw/renderer/interactiveScene.ts
View File

@ -30,7 +30,7 @@ import {
shouldShowBoundingBox,
} from "../element/transformHandles";
import { arrayToMap, throttleRAF } from "../utils";
import type { InteractiveCanvasAppState, Point } from "../types";
import type { InteractiveCanvasAppState } from "../types";
import { DEFAULT_TRANSFORM_HANDLE_SPACING, FRAME_STYLE } from "../constants";
import { renderSnaps } from "../renderer/renderSnaps";
@ -69,7 +69,8 @@ import type {
InteractiveSceneRenderConfig,
RenderableElementsMap,
} from "../scene/types";
import { getCornerRadius } from "../math";
import type { GlobalPoint, LocalPoint, Radians } from "../../math";
import { getCornerRadius } from "../shapes";
const renderLinearElementPointHighlight = (
context: CanvasRenderingContext2D,
@ -101,7 +102,7 @@ const renderLinearElementPointHighlight = (
context.restore();
};
const highlightPoint = (
const highlightPoint = <Point extends LocalPoint | GlobalPoint>(
point: Point,
context: CanvasRenderingContext2D,
appState: InteractiveCanvasAppState,
@ -168,7 +169,7 @@ const strokeDiamondWithRotation = (
context.restore();
};
const renderSingleLinearPoint = (
const renderSingleLinearPoint = <Point extends GlobalPoint | LocalPoint>(
context: CanvasRenderingContext2D,
appState: InteractiveCanvasAppState,
point: Point,
@ -499,7 +500,7 @@ const renderLinearPointHandles = (
element,
elementsMap,
appState,
).filter((midPoint) => midPoint !== null) as Point[];
).filter((midPoint): midPoint is GlobalPoint => midPoint !== null);
midPoints.forEach((segmentMidPoint) => {
if (
@ -931,7 +932,7 @@ const _renderInteractiveScene = ({
context.setLineDash(initialLineDash);
const transformHandles = getTransformHandlesFromCoords(
[x1, y1, x2, y2, (x1 + x2) / 2, (y1 + y2) / 2],
0,
0 as Radians,
appState.zoom,
"mouse",
isFrameSelected

6
packages/excalidraw/renderer/renderElement.ts
View File

@ -27,7 +27,6 @@ import type {
InteractiveCanvasRenderConfig,
} from "../scene/types";
import { distance, getFontString, isRTL } from "../utils";
import { getCornerRadius, isRightAngle } from "../math";
import rough from "roughjs/bin/rough";
import type {
AppState,
@ -60,6 +59,8 @@ import { LinearElementEditor } from "../element/linearElementEditor";
import { getContainingFrame } from "../frame";
import { ShapeCache } from "../scene/ShapeCache";
import { getVerticalOffset } from "../fonts";
import { isRightAngleRads } from "../../math";
import { getCornerRadius } from "../shapes";
// using a stronger invert (100% vs our regular 93%) and saturate
// as a temp hack to make images in dark theme look closer to original
@ -907,7 +908,8 @@ export const renderElement = (
(!element.angle ||
// or check if angle is a right angle in which case we can still
// disable smoothing without adversely affecting the result
isRightAngle(element.angle))
// We need less-than comparison because of FP artihmetic
isRightAngleRads(element.angle))
) {
// Disabling smoothing makes output much sharper, especially for
// text. Unless for non-right angles, where the aliasing is really

45
packages/excalidraw/renderer/renderSnaps.ts
View File

@ -1,6 +1,7 @@
import { point, type GlobalPoint, type LocalPoint } from "../../math";
import { THEME } from "../constants";
import type { PointSnapLine, PointerSnapLine } from "../snapping";
import type { InteractiveCanvasAppState, Point } from "../types";
import type { InteractiveCanvasAppState } from "../types";
const SNAP_COLOR_LIGHT = "#ff6b6b";
const SNAP_COLOR_DARK = "#ff0000";
@ -85,7 +86,7 @@ const drawPointerSnapLine = (
}
};
const drawCross = (
const drawCross = <Point extends LocalPoint | GlobalPoint>(
[x, y]: Point,
appState: InteractiveCanvasAppState,
context: CanvasRenderingContext2D,
@ -106,18 +107,18 @@ const drawCross = (
context.restore();
};
const drawLine = (
const drawLine = <Point extends LocalPoint | GlobalPoint>(
from: Point,
to: Point,
context: CanvasRenderingContext2D,
) => {
context.beginPath();
context.lineTo(...from);
context.lineTo(...to);
context.lineTo(from[0], from[1]);
context.lineTo(to[0], to[1]);
context.stroke();
};
const drawGapLine = (
const drawGapLine = <Point extends LocalPoint | GlobalPoint>(
from: Point,
to: Point,
direction: "horizontal" | "vertical",
@ -138,24 +139,28 @@ const drawGapLine = (
const halfPoint = [(from[0] + to[0]) / 2, from[1]];
// (1)
if (!appState.zenModeEnabled) {
drawLine([from[0], from[1] - FULL], [from[0], from[1] + FULL], context);
drawLine(
point(from[0], from[1] - FULL),
point(from[0], from[1] + FULL),
context,
);
}
// (3)
drawLine(
[halfPoint[0] - QUARTER, halfPoint[1] - HALF],
[halfPoint[0] - QUARTER, halfPoint[1] + HALF],
point(halfPoint[0] - QUARTER, halfPoint[1] - HALF),
point(halfPoint[0] - QUARTER, halfPoint[1] + HALF),
context,
);
drawLine(
[halfPoint[0] + QUARTER, halfPoint[1] - HALF],
[halfPoint[0] + QUARTER, halfPoint[1] + HALF],
point(halfPoint[0] + QUARTER, halfPoint[1] - HALF),
point(halfPoint[0] + QUARTER, halfPoint[1] + HALF),
context,
);
if (!appState.zenModeEnabled) {
// (4)
drawLine([to[0], to[1] - FULL], [to[0], to[1] + FULL], context);
drawLine(point(to[0], to[1] - FULL), point(to[0], to[1] + FULL), context);
// (2)
drawLine(from, to, context);
@ -164,24 +169,28 @@ const drawGapLine = (
const halfPoint = [from[0], (from[1] + to[1]) / 2];
// (1)
if (!appState.zenModeEnabled) {
drawLine([from[0] - FULL, from[1]], [from[0] + FULL, from[1]], context);
drawLine(
point(from[0] - FULL, from[1]),
point(from[0] + FULL, from[1]),
context,
);
}
// (3)
drawLine(
[halfPoint[0] - HALF, halfPoint[1] - QUARTER],
[halfPoint[0] + HALF, halfPoint[1] - QUARTER],
point(halfPoint[0] - HALF, halfPoint[1] - QUARTER),
point(halfPoint[0] + HALF, halfPoint[1] - QUARTER),
context,
);
drawLine(
[halfPoint[0] - HALF, halfPoint[1] + QUARTER],
[halfPoint[0] + HALF, halfPoint[1] + QUARTER],
point(halfPoint[0] - HALF, halfPoint[1] + QUARTER),
point(halfPoint[0] + HALF, halfPoint[1] + QUARTER),
context,
);
if (!appState.zenModeEnabled) {
// (4)
drawLine([to[0] - FULL, to[1]], [to[0] + FULL, to[1]], context);
drawLine(point(to[0] - FULL, to[1]), point(to[0] + FULL, to[1]), context);
// (2)
drawLine(from, to, context);

2
packages/excalidraw/renderer/staticSvgScene.ts
View File

@ -30,13 +30,13 @@ import type {
NonDeletedExcalidrawElement,
} from "../element/types";
import { getContainingFrame } from "../frame";
import { getCornerRadius, isPathALoop } from "../math";
import { ShapeCache } from "../scene/ShapeCache";
import type { RenderableElementsMap, SVGRenderConfig } from "../scene/types";
import type { AppState, BinaryFiles } from "../types";
import { getFontFamilyString, isRTL, isTestEnv } from "../utils";
import { getFreeDrawSvgPath, IMAGE_INVERT_FILTER } from "./renderElement";
import { getVerticalOffset } from "../fonts";
import { getCornerRadius, isPathALoop } from "../shapes";
const roughSVGDrawWithPrecision = (
rsvg: RoughSVG,

33
packages/excalidraw/scene/Shape.ts
View File

@ -1,3 +1,4 @@
import type { Point as RoughPoint } from "roughjs/bin/geometry";
import type { Drawable, Options } from "roughjs/bin/core";
import type { RoughGenerator } from "roughjs/bin/generator";
import { getDiamondPoints, getArrowheadPoints } from "../element";
@ -9,7 +10,6 @@ import type {
ExcalidrawLinearElement,
Arrowhead,
} from "../element/types";
import { isPathALoop, getCornerRadius, distanceSq2d } from "../math";
import { generateFreeDrawShape } from "../renderer/renderElement";
import { isTransparent, assertNever } from "../utils";
import { simplify } from "points-on-curve";
@ -23,6 +23,13 @@ import {
} from "../element/typeChecks";
import { canChangeRoundness } from "./comparisons";
import type { EmbedsValidationStatus } from "../types";
import {
point,
pointDistance,
type GlobalPoint,
type LocalPoint,
} from "../../math";
import { getCornerRadius, isPathALoop } from "../shapes";
const getDashArrayDashed = (strokeWidth: number) => [8, 8 + strokeWidth];
@ -399,12 +406,14 @@ export const _generateElementShape = (
// points array can be empty in the beginning, so it is important to add
// initial position to it
const points = element.points.length ? element.points : [[0, 0]];
const points = element.points.length
? element.points
: [point<LocalPoint>(0, 0)];
if (isElbowArrow(element)) {
shape = [
generator.path(
generateElbowArrowShape(points as [number, number][], 16),
generateElbowArrowShape(points, 16),
generateRoughOptions(element, true),
),
];
@ -412,12 +421,16 @@ export const _generateElementShape = (
// curve is always the first element
// this simplifies finding the curve for an element
if (options.fill) {
shape = [generator.polygon(points as [number, number][], options)];
shape = [
generator.polygon(points as unknown as RoughPoint[], options),
];
} else {
shape = [generator.linearPath(points as [number, number][], options)];
shape = [
generator.linearPath(points as unknown as RoughPoint[], options),
];
}
} else {
shape = [generator.curve(points as [number, number][], options)];
shape = [generator.curve(points as unknown as RoughPoint[], options)];
}
// add lines only in arrow
@ -491,8 +504,8 @@ export const _generateElementShape = (
}
};
const generateElbowArrowShape = (
points: [number, number][],
const generateElbowArrowShape = <Point extends GlobalPoint | LocalPoint>(
points: readonly Point[],
radius: number,
) => {
const subpoints = [] as [number, number][];
@ -501,8 +514,8 @@ const generateElbowArrowShape = (
const next = points[i + 1];
const corner = Math.min(
radius,
Math.sqrt(distanceSq2d(points[i], next)) / 2,
Math.sqrt(distanceSq2d(points[i], prev)) / 2,
pointDistance(points[i], next) / 2,
pointDistance(points[i], prev) / 2,
);
if (prev[0] < points[i][0] && prev[1] === points[i][1]) {

2
packages/excalidraw/scene/normalize.ts
View File

@ -1,5 +1,5 @@
import { clamp, round } from "../../math";
import { MAX_ZOOM, MIN_ZOOM } from "../constants";
import { clamp, round } from "../math";
import type { NormalizedZoomValue } from "../types";
export const getNormalizedZoom = (zoom: number): NormalizedZoomValue => {

328
packages/excalidraw/shapes.tsx
View File

@ -1,5 +1,16 @@
import {
isPoint,
point,
pointDistance,
pointFromPair,
pointRotateRads,
pointsEqual,
type GlobalPoint,
type LocalPoint,
} from "../math";
import {
getClosedCurveShape,
getCurvePathOps,
getCurveShape,
getEllipseShape,
getFreedrawShape,
@ -18,13 +29,27 @@ import {
SelectionIcon,
TextIcon,
} from "./components/icons";
import {
DEFAULT_ADAPTIVE_RADIUS,
DEFAULT_PROPORTIONAL_RADIUS,
LINE_CONFIRM_THRESHOLD,
ROUNDNESS,
} from "./constants";
import { getElementAbsoluteCoords } from "./element";
import type { Bounds } from "./element/bounds";
import { shouldTestInside } from "./element/collision";
import { LinearElementEditor } from "./element/linearElementEditor";
import { getBoundTextElement } from "./element/textElement";
import type { ElementsMap, ExcalidrawElement } from "./element/types";
import type {
ElementsMap,
ExcalidrawElement,
ExcalidrawLinearElement,
NonDeleted,
} from "./element/types";
import { KEYS } from "./keys";
import { ShapeCache } from "./scene/ShapeCache";
import type { NormalizedZoomValue, Zoom } from "./types";
import { invariant } from "./utils";
export const SHAPES = [
{
@ -116,10 +141,10 @@ export const findShapeByKey = (key: string) => {
* get the pure geometric shape of an excalidraw element
* which is then used for hit detection
*/
export const getElementShape = (
export const getElementShape = <Point extends GlobalPoint | LocalPoint>(
element: ExcalidrawElement,
elementsMap: ElementsMap,
): GeometricShape => {
): GeometricShape<Point> => {
switch (element.type) {
case "rectangle":
case "diamond":
@ -139,17 +164,19 @@ export const getElementShape = (
const [, , , , cx, cy] = getElementAbsoluteCoords(element, elementsMap);
return shouldTestInside(element)
? getClosedCurveShape(
? getClosedCurveShape<Point>(
element,
roughShape,
[element.x, element.y],
point<Point>(element.x, element.y),
element.angle,
[cx, cy],
point(cx, cy),
)
: getCurveShape(roughShape, [element.x, element.y], element.angle, [
cx,
cy,
]);
: getCurveShape<Point>(
roughShape,
point<Point>(element.x, element.y),
element.angle,
point(cx, cy),
);
}
case "ellipse":
@ -157,15 +184,19 @@ export const getElementShape = (
case "freedraw": {
const [, , , , cx, cy] = getElementAbsoluteCoords(element, elementsMap);
return getFreedrawShape(element, [cx, cy], shouldTestInside(element));
return getFreedrawShape(
element,
point(cx, cy),
shouldTestInside(element),
);
}
}
};
export const getBoundTextShape = (
export const getBoundTextShape = <Point extends GlobalPoint | LocalPoint>(
element: ExcalidrawElement,
elementsMap: ElementsMap,
): GeometricShape | null => {
): GeometricShape<Point> | null => {
const boundTextElement = getBoundTextElement(element, elementsMap);
if (boundTextElement) {
@ -189,3 +220,274 @@ export const getBoundTextShape = (
return null;
};
export const getControlPointsForBezierCurve = <
P extends GlobalPoint | LocalPoint,
>(
element: NonDeleted<ExcalidrawLinearElement>,
endPoint: P,
) => {
const shape = ShapeCache.generateElementShape(element, null);
if (!shape) {
return null;
}
const ops = getCurvePathOps(shape[0]);
let currentP = point<P>(0, 0);
let index = 0;
let minDistance = Infinity;
let controlPoints: P[] | null = null;
while (index < ops.length) {
const { op, data } = ops[index];
if (op === "move") {
invariant(
isPoint(data),
"The returned ops is not compatible with a point",
);
currentP = pointFromPair(data);
}
if (op === "bcurveTo") {
const p0 = currentP;
const p1 = point<P>(data[0], data[1]);
const p2 = point<P>(data[2], data[3]);
const p3 = point<P>(data[4], data[5]);
const distance = pointDistance(p3, endPoint);
if (distance < minDistance) {
minDistance = distance;
controlPoints = [p0, p1, p2, p3];
}
currentP = p3;
}
index++;
}
return controlPoints;
};
export const getBezierXY = <P extends GlobalPoint | LocalPoint>(
p0: P,
p1: P,
p2: P,
p3: P,
t: number,
): P => {
const equation = (t: number, idx: number) =>
Math.pow(1 - t, 3) * p3[idx] +
3 * t * Math.pow(1 - t, 2) * p2[idx] +
3 * Math.pow(t, 2) * (1 - t) * p1[idx] +
p0[idx] * Math.pow(t, 3);
const tx = equation(t, 0);
const ty = equation(t, 1);
return point(tx, ty);
};
const getPointsInBezierCurve = <P extends GlobalPoint | LocalPoint>(
element: NonDeleted<ExcalidrawLinearElement>,
endPoint: P,
) => {
const controlPoints: P[] = getControlPointsForBezierCurve(element, endPoint)!;
if (!controlPoints) {
return [];
}
const pointsOnCurve: P[] = [];
let t = 1;
// Take 20 points on curve for better accuracy
while (t > 0) {
const p = getBezierXY(
controlPoints[0],
controlPoints[1],
controlPoints[2],
controlPoints[3],
t,
);
pointsOnCurve.push(point(p[0], p[1]));
t -= 0.05;
}
if (pointsOnCurve.length) {
if (pointsEqual(pointsOnCurve.at(-1)!, endPoint)) {
pointsOnCurve.push(point(endPoint[0], endPoint[1]));
}
}
return pointsOnCurve;
};
const getBezierCurveArcLengths = <P extends GlobalPoint | LocalPoint>(
element: NonDeleted<ExcalidrawLinearElement>,
endPoint: P,
) => {
const arcLengths: number[] = [];
arcLengths[0] = 0;
const points = getPointsInBezierCurve(element, endPoint);
let index = 0;
let distance = 0;
while (index < points.length - 1) {
const segmentDistance = pointDistance(points[index], points[index + 1]);
distance += segmentDistance;
arcLengths.push(distance);
index++;
}
return arcLengths;
};
export const getBezierCurveLength = <P extends GlobalPoint | LocalPoint>(
element: NonDeleted<ExcalidrawLinearElement>,
endPoint: P,
) => {
const arcLengths = getBezierCurveArcLengths(element, endPoint);
return arcLengths.at(-1) as number;
};
// This maps interval to actual interval t on the curve so that when t = 0.5, its actually the point at 50% of the length
export const mapIntervalToBezierT = <P extends GlobalPoint | LocalPoint>(
element: NonDeleted<ExcalidrawLinearElement>,
endPoint: P,
interval: number, // The interval between 0 to 1 for which you want to find the point on the curve,
) => {
const arcLengths = getBezierCurveArcLengths(element, endPoint);
const pointsCount = arcLengths.length - 1;
const curveLength = arcLengths.at(-1) as number;
const targetLength = interval * curveLength;
let low = 0;
let high = pointsCount;
let index = 0;
// Doing a binary search to find the largest length that is less than the target length
while (low < high) {
index = Math.floor(low + (high - low) / 2);
if (arcLengths[index] < targetLength) {
low = index + 1;
} else {
high = index;
}
}
if (arcLengths[index] > targetLength) {
index--;
}
if (arcLengths[index] === targetLength) {
return index / pointsCount;
}
return (
1 -
(index +
(targetLength - arcLengths[index]) /
(arcLengths[index + 1] - arcLengths[index])) /
pointsCount
);
};
/**
* Get the axis-aligned bounding box for a given element
*/
export const aabbForElement = (
element: Readonly<ExcalidrawElement>,
offset?: [number, number, number, number],
) => {
const bbox = {
minX: element.x,
minY: element.y,
maxX: element.x + element.width,
maxY: element.y + element.height,
midX: element.x + element.width / 2,
midY: element.y + element.height / 2,
};
const center = point(bbox.midX, bbox.midY);
const [topLeftX, topLeftY] = pointRotateRads(
point(bbox.minX, bbox.minY),
center,
element.angle,
);
const [topRightX, topRightY] = pointRotateRads(
point(bbox.maxX, bbox.minY),
center,
element.angle,
);
const [bottomRightX, bottomRightY] = pointRotateRads(
point(bbox.maxX, bbox.maxY),
center,
element.angle,
);
const [bottomLeftX, bottomLeftY] = pointRotateRads(
point(bbox.minX, bbox.maxY),
center,
element.angle,
);
const bounds = [
Math.min(topLeftX, topRightX, bottomRightX, bottomLeftX),
Math.min(topLeftY, topRightY, bottomRightY, bottomLeftY),
Math.max(topLeftX, topRightX, bottomRightX, bottomLeftX),
Math.max(topLeftY, topRightY, bottomRightY, bottomLeftY),
] as Bounds;
if (offset) {
const [topOffset, rightOffset, downOffset, leftOffset] = offset;
return [
bounds[0] - leftOffset,
bounds[1] - topOffset,
bounds[2] + rightOffset,
bounds[3] + downOffset,
] as Bounds;
}
return bounds;
};
export const pointInsideBounds = <P extends GlobalPoint | LocalPoint>(
p: P,
bounds: Bounds,
): boolean =>
p[0] > bounds[0] && p[0] < bounds[2] && p[1] > bounds[1] && p[1] < bounds[3];
export const aabbsOverlapping = (a: Bounds, b: Bounds) =>
pointInsideBounds(point(a[0], a[1]), b) ||
pointInsideBounds(point(a[2], a[1]), b) ||
pointInsideBounds(point(a[2], a[3]), b) ||
pointInsideBounds(point(a[0], a[3]), b) ||
pointInsideBounds(point(b[0], b[1]), a) ||
pointInsideBounds(point(b[2], b[1]), a) ||
pointInsideBounds(point(b[2], b[3]), a) ||
pointInsideBounds(point(b[0], b[3]), a);
export const getCornerRadius = (x: number, element: ExcalidrawElement) => {
if (
element.roundness?.type === ROUNDNESS.PROPORTIONAL_RADIUS ||
element.roundness?.type === ROUNDNESS.LEGACY
) {
return x * DEFAULT_PROPORTIONAL_RADIUS;
}
if (element.roundness?.type === ROUNDNESS.ADAPTIVE_RADIUS) {
const fixedRadiusSize = element.roundness?.value ?? DEFAULT_ADAPTIVE_RADIUS;
const CUTOFF_SIZE = fixedRadiusSize / DEFAULT_PROPORTIONAL_RADIUS;
if (x <= CUTOFF_SIZE) {
return x * DEFAULT_PROPORTIONAL_RADIUS;
}
return fixedRadiusSize;
}
return 0;
};
// Checks if the first and last point are close enough
// to be considered a loop
export const isPathALoop = (
points: ExcalidrawLinearElement["points"],
/** supply if you want the loop detection to account for current zoom */
zoomValue: Zoom["value"] = 1 as NormalizedZoomValue,
): boolean => {
if (points.length >= 3) {
const [first, last] = [points[0], points[points.length - 1]];
const distance = pointDistance(first, last);
// Adjusting LINE_CONFIRM_THRESHOLD to current zoom so that when zoomed in
// really close we make the threshold smaller, and vice versa.
return distance <= LINE_CONFIRM_THRESHOLD / zoomValue;
}
return false;
};

277
packages/excalidraw/snapping.ts
View File

@ -1,3 +1,12 @@
import type { InclusiveRange } from "../math";
import {
point,
pointRotateRads,
rangeInclusive,
rangeIntersection,
rangesOverlap,
type GlobalPoint,
} from "../math";
import { TOOL_TYPE } from "./constants";
import type { Bounds } from "./element/bounds";
import {
@ -14,7 +23,6 @@ import type {
} from "./element/types";
import { getMaximumGroups } from "./groups";
import { KEYS } from "./keys";
import { rangeIntersection, rangesOverlap, rotatePoint } from "./math";
import {
getSelectedElements,
getVisibleAndNonSelectedElements,
@ -23,7 +31,7 @@ import type {
AppClassProperties,
AppState,
KeyboardModifiersObject,
Point,
NullableGridSize,
} from "./types";
const SNAP_DISTANCE = 8;
@ -42,7 +50,7 @@ type Vector2D = {
y: number;
};
type PointPair = [Point, Point];
type PointPair = [GlobalPoint, GlobalPoint];
export type PointSnap = {
type: "point";
@ -62,9 +70,9 @@ export type Gap = {
// ↑ end side
startBounds: Bounds;
endBounds: Bounds;
startSide: [Point, Point];
endSide: [Point, Point];
overlap: [number, number];
startSide: [GlobalPoint, GlobalPoint];
endSide: [GlobalPoint, GlobalPoint];
overlap: InclusiveRange;
length: number;
};
@ -88,7 +96,7 @@ export type Snaps = Snap[];
export type PointSnapLine = {
type: "points";
points: Point[];
points: GlobalPoint[];
};
export type PointerSnapLine = {
@ -108,14 +116,14 @@ export type SnapLine = PointSnapLine | GapSnapLine | PointerSnapLine;
// -----------------------------------------------------------------------------
export class SnapCache {
private static referenceSnapPoints: Point[] | null = null;
private static referenceSnapPoints: GlobalPoint[] | null = null;
private static visibleGaps: {
verticalGaps: Gap[];
horizontalGaps: Gap[];
} | null = null;
public static setReferenceSnapPoints = (snapPoints: Point[] | null) => {
public static setReferenceSnapPoints = (snapPoints: GlobalPoint[] | null) => {
SnapCache.referenceSnapPoints = snapPoints;
};
@ -191,8 +199,8 @@ export const getElementsCorners = (
omitCenter: false,
boundingBoxCorners: false,
},
): Point[] => {
let result: Point[] = [];
): GlobalPoint[] => {
let result: GlobalPoint[] = [];
if (elements.length === 1) {
const element = elements[0];
@ -219,33 +227,53 @@ export const getElementsCorners = (
(element.type === "diamond" || element.type === "ellipse") &&
!boundingBoxCorners
) {
const leftMid = rotatePoint(
[x1, y1 + halfHeight],
[cx, cy],
const leftMid = pointRotateRads<GlobalPoint>(
point(x1, y1 + halfHeight),
point(cx, cy),
element.angle,
);
const topMid = rotatePoint([x1 + halfWidth, y1], [cx, cy], element.angle);
const rightMid = rotatePoint(
[x2, y1 + halfHeight],
[cx, cy],
const topMid = pointRotateRads<GlobalPoint>(
point(x1 + halfWidth, y1),
point(cx, cy),
element.angle,
);
const bottomMid = rotatePoint(
[x1 + halfWidth, y2],
[cx, cy],
const rightMid = pointRotateRads<GlobalPoint>(
point(x2, y1 + halfHeight),
point(cx, cy),
element.angle,
);
const center: Point = [cx, cy];
const bottomMid = pointRotateRads<GlobalPoint>(
point(x1 + halfWidth, y2),
point(cx, cy),
element.angle,
);
const center = point<GlobalPoint>(cx, cy);
result = omitCenter
? [leftMid, topMid, rightMid, bottomMid]
: [leftMid, topMid, rightMid, bottomMid, center];
} else {
const topLeft = rotatePoint([x1, y1], [cx, cy], element.angle);
const topRight = rotatePoint([x2, y1], [cx, cy], element.angle);
const bottomLeft = rotatePoint([x1, y2], [cx, cy], element.angle);
const bottomRight = rotatePoint([x2, y2], [cx, cy], element.angle);
const center: Point = [cx, cy];
const topLeft = pointRotateRads<GlobalPoint>(
point(x1, y1),
point(cx, cy),
element.angle,
);
const topRight = pointRotateRads<GlobalPoint>(
point(x2, y1),
point(cx, cy),
element.angle,
);
const bottomLeft = pointRotateRads<GlobalPoint>(
point(x1, y2),
point(cx, cy),
element.angle,
);
const bottomRight = pointRotateRads<GlobalPoint>(
point(x2, y2),
point(cx, cy),
element.angle,
);
const center = point<GlobalPoint>(cx, cy);
result = omitCenter
? [topLeft, topRight, bottomLeft, bottomRight]
@ -259,18 +287,18 @@ export const getElementsCorners = (
const width = maxX - minX;
const height = maxY - minY;
const topLeft: Point = [minX, minY];
const topRight: Point = [maxX, minY];
const bottomLeft: Point = [minX, maxY];
const bottomRight: Point = [maxX, maxY];
const center: Point = [minX + width / 2, minY + height / 2];
const topLeft = point<GlobalPoint>(minX, minY);
const topRight = point<GlobalPoint>(maxX, minY);
const bottomLeft = point<GlobalPoint>(minX, maxY);
const bottomRight = point<GlobalPoint>(maxX, maxY);
const center = point<GlobalPoint>(minX + width / 2, minY + height / 2);
result = omitCenter
? [topLeft, topRight, bottomLeft, bottomRight]
: [topLeft, topRight, bottomLeft, bottomRight, center];
}
return result.map((point) => [round(point[0]), round(point[1])] as Point);
return result.map((p) => point(round(p[0]), round(p[1])));
};
const getReferenceElements = (
@ -339,23 +367,20 @@ export const getVisibleGaps = (
if (
startMaxX < endMinX &&
rangesOverlap([startMinY, startMaxY], [endMinY, endMaxY])
rangesOverlap(
rangeInclusive(startMinY, startMaxY),
rangeInclusive(endMinY, endMaxY),
)
) {
horizontalGaps.push({
startBounds,
endBounds,
startSide: [
[startMaxX, startMinY],
[startMaxX, startMaxY],
],
endSide: [
[endMinX, endMinY],
[endMinX, endMaxY],
],
startSide: [point(startMaxX, startMinY), point(startMaxX, startMaxY)],
endSide: [point(endMinX, endMinY), point(endMinX, endMaxY)],
length: endMinX - startMaxX,
overlap: rangeIntersection(
[startMinY, startMaxY],
[endMinY, endMaxY],
rangeInclusive(startMinY, startMaxY),
rangeInclusive(endMinY, endMaxY),
)!,
});
}
@ -382,23 +407,20 @@ export const getVisibleGaps = (
if (
startMaxY < endMinY &&
rangesOverlap([startMinX, startMaxX], [endMinX, endMaxX])
rangesOverlap(
rangeInclusive(startMinX, startMaxX),
rangeInclusive(endMinX, endMaxX),
)
) {
verticalGaps.push({
startBounds,
endBounds,
startSide: [
[startMinX, startMaxY],
[startMaxX, startMaxY],
],
endSide: [
[endMinX, endMinY],
[endMaxX, endMinY],
],
startSide: [point(startMinX, startMaxY), point(startMaxX, startMaxY)],
endSide: [point(endMinX, endMinY), point(endMaxX, endMinY)],
length: endMinY - startMaxY,
overlap: rangeIntersection(
[startMinX, startMaxX],
[endMinX, endMaxX],
rangeInclusive(startMinX, startMaxX),
rangeInclusive(endMinX, endMaxX),
)!,
});
}
@ -441,7 +463,7 @@ const getGapSnaps = (
const centerY = (minY + maxY) / 2;
for (const gap of horizontalGaps) {
if (!rangesOverlap([minY, maxY], gap.overlap)) {
if (!rangesOverlap(rangeInclusive(minY, maxY), gap.overlap)) {
continue;
}
@ -510,7 +532,7 @@ const getGapSnaps = (
}
}
for (const gap of verticalGaps) {
if (!rangesOverlap([minX, maxX], gap.overlap)) {
if (!rangesOverlap(rangeInclusive(minX, maxX), gap.overlap)) {
continue;
}
@ -603,7 +625,7 @@ export const getReferenceSnapPoints = (
const getPointSnaps = (
selectedElements: ExcalidrawElement[],
selectionSnapPoints: Point[],
selectionSnapPoints: GlobalPoint[],
app: AppClassProperties,
event: KeyboardModifiersObject,
nearestSnapsX: Snaps,
@ -779,8 +801,8 @@ const round = (x: number) => {
return Math.round(x * 10 ** decimalPlaces) / 10 ** decimalPlaces;
};
const dedupePoints = (points: Point[]): Point[] => {
const map = new Map<string, Point>();
const dedupePoints = (points: GlobalPoint[]): GlobalPoint[] => {
const map = new Map<string, GlobalPoint>();
for (const point of points) {
const key = point.join(",");
@ -797,8 +819,8 @@ const createPointSnapLines = (
nearestSnapsX: Snaps,
nearestSnapsY: Snaps,
): PointSnapLine[] => {
const snapsX = {} as { [key: string]: Point[] };
const snapsY = {} as { [key: string]: Point[] };
const snapsX = {} as { [key: string]: GlobalPoint[] };
const snapsY = {} as { [key: string]: GlobalPoint[] };
if (nearestSnapsX.length > 0) {
for (const snap of nearestSnapsX) {
@ -809,8 +831,8 @@ const createPointSnapLines = (
snapsX[key] = [];
}
snapsX[key].push(
...snap.points.map(
(point) => [round(point[0]), round(point[1])] as Point,
...snap.points.map((p) =>
point<GlobalPoint>(round(p[0]), round(p[1])),
),
);
}
@ -826,8 +848,8 @@ const createPointSnapLines = (
snapsY[key] = [];
}
snapsY[key].push(
...snap.points.map(
(point) => [round(point[0]), round(point[1])] as Point,
...snap.points.map((p) =>
point<GlobalPoint>(round(p[0]), round(p[1])),
),
);
}
@ -840,8 +862,8 @@ const createPointSnapLines = (
type: "points",
points: dedupePoints(
points
.map((point) => {
return [Number(key), point[1]] as Point;
.map((p) => {
return point<GlobalPoint>(Number(key), p[1]);
})
.sort((a, b) => a[1] - b[1]),
),
@ -853,8 +875,8 @@ const createPointSnapLines = (
type: "points",
points: dedupePoints(
points
.map((point) => {
return [point[0], Number(key)] as Point;
.map((p) => {
return point<GlobalPoint>(p[0], Number(key));
})
.sort((a, b) => a[0] - b[0]),
),
@ -898,12 +920,12 @@ const createGapSnapLines = (
const [endMinX, endMinY, endMaxX, endMaxY] = gapSnap.gap.endBounds;
const verticalIntersection = rangeIntersection(
[minY, maxY],
rangeInclusive(minY, maxY),
gapSnap.gap.overlap,
);
const horizontalGapIntersection = rangeIntersection(
[minX, maxX],
rangeInclusive(minX, maxX),
gapSnap.gap.overlap,
);
@ -918,16 +940,16 @@ const createGapSnapLines = (
type: "gap",
direction: "horizontal",
points: [
[gapSnap.gap.startSide[0][0], gapLineY],
[minX, gapLineY],
point(gapSnap.gap.startSide[0][0], gapLineY),
point(minX, gapLineY),
],
},
{
type: "gap",
direction: "horizontal",
points: [
[maxX, gapLineY],
[gapSnap.gap.endSide[0][0], gapLineY],
point(maxX, gapLineY),
point(gapSnap.gap.endSide[0][0], gapLineY),
],
},
);
@ -944,16 +966,16 @@ const createGapSnapLines = (
type: "gap",
direction: "vertical",
points: [
[gapLineX, gapSnap.gap.startSide[0][1]],
[gapLineX, minY],
point(gapLineX, gapSnap.gap.startSide[0][1]),
point(gapLineX, minY),
],
},
{
type: "gap",
direction: "vertical",
points: [
[gapLineX, maxY],
[gapLineX, gapSnap.gap.endSide[0][1]],
point(gapLineX, maxY),
point(gapLineX, gapSnap.gap.endSide[0][1]),
],
},
);
@ -969,18 +991,12 @@ const createGapSnapLines = (
{
type: "gap",
direction: "horizontal",
points: [
[startMaxX, gapLineY],
[endMinX, gapLineY],
],
points: [point(startMaxX, gapLineY), point(endMinX, gapLineY)],
},
{
type: "gap",
direction: "horizontal",
points: [
[endMaxX, gapLineY],
[minX, gapLineY],
],
points: [point(endMaxX, gapLineY), point(minX, gapLineY)],
},
);
}
@ -995,18 +1011,12 @@ const createGapSnapLines = (
{
type: "gap",
direction: "horizontal",
points: [
[maxX, gapLineY],
[startMinX, gapLineY],
],
points: [point(maxX, gapLineY), point(startMinX, gapLineY)],
},
{
type: "gap",
direction: "horizontal",
points: [
[startMaxX, gapLineY],
[endMinX, gapLineY],
],
points: [point(startMaxX, gapLineY), point(endMinX, gapLineY)],
},
);
}
@ -1021,18 +1031,12 @@ const createGapSnapLines = (
{
type: "gap",
direction: "vertical",
points: [
[gapLineX, maxY],
[gapLineX, startMinY],
],
points: [point(gapLineX, maxY), point(gapLineX, startMinY)],
},
{
type: "gap",
direction: "vertical",
points: [
[gapLineX, startMaxY],
[gapLineX, endMinY],
],
points: [point(gapLineX, startMaxY), point(gapLineX, endMinY)],
},
);
}
@ -1047,18 +1051,12 @@ const createGapSnapLines = (
{
type: "gap",
direction: "vertical",
points: [
[gapLineX, startMaxY],
[gapLineX, endMinY],
],
points: [point(gapLineX, startMaxY), point(gapLineX, endMinY)],
},
{
type: "gap",
direction: "vertical",
points: [
[gapLineX, endMaxY],
[gapLineX, minY],
],
points: [point(gapLineX, endMaxY), point(gapLineX, minY)],
},
);
}
@ -1071,8 +1069,8 @@ const createGapSnapLines = (
gapSnapLines.map((gapSnapLine) => {
return {
...gapSnapLine,
points: gapSnapLine.points.map(
(point) => [round(point[0]), round(point[1])] as Point,
points: gapSnapLine.points.map((p) =>
point(round(p[0]), round(p[1])),
) as PointPair,
};
}),
@ -1117,40 +1115,40 @@ export const snapResizingElements = (
}
}
const selectionSnapPoints: Point[] = [];
const selectionSnapPoints: GlobalPoint[] = [];
if (transformHandle) {
switch (transformHandle) {
case "e": {
selectionSnapPoints.push([maxX, minY], [maxX, maxY]);
selectionSnapPoints.push(point(maxX, minY), point(maxX, maxY));
break;
}
case "w": {
selectionSnapPoints.push([minX, minY], [minX, maxY]);
selectionSnapPoints.push(point(minX, minY), point(minX, maxY));
break;
}
case "n": {
selectionSnapPoints.push([minX, minY], [maxX, minY]);
selectionSnapPoints.push(point(minX, minY), point(maxX, minY));
break;
}
case "s": {
selectionSnapPoints.push([minX, maxY], [maxX, maxY]);
selectionSnapPoints.push(point(minX, maxY), point(maxX, maxY));
break;
}
case "ne": {
selectionSnapPoints.push([maxX, minY]);
selectionSnapPoints.push(point(maxX, minY));
break;
}
case "nw": {
selectionSnapPoints.push([minX, minY]);
selectionSnapPoints.push(point(minX, minY));
break;
}
case "se": {
selectionSnapPoints.push([maxX, maxY]);
selectionSnapPoints.push(point(maxX, maxY));
break;
}
case "sw": {
selectionSnapPoints.push([minX, maxY]);
selectionSnapPoints.push(point(minX, maxY));
break;
}
}
@ -1192,11 +1190,11 @@ export const snapResizingElements = (
round(bound),
);
const corners: Point[] = [
[x1, y1],
[x1, y2],
[x2, y1],
[x2, y2],
const corners: GlobalPoint[] = [
point(x1, y1),
point(x1, y2),
point(x2, y1),
point(x2, y2),
];
getPointSnaps(
@ -1232,8 +1230,8 @@ export const snapNewElement = (
};
}
const selectionSnapPoints: Point[] = [
[origin.x + dragOffset.x, origin.y + dragOffset.y],
const selectionSnapPoints: GlobalPoint[] = [
point(origin.x + dragOffset.x, origin.y + dragOffset.y),
];
const snapDistance = getSnapDistance(app.state.zoom.value);
@ -1333,7 +1331,7 @@ export const getSnapLinesAtPointer = (
verticalSnapLines.push({
type: "pointer",
points: [corner, [corner[0], pointer.y]],
points: [corner, point(corner[0], pointer.y)],
direction: "vertical",
});
@ -1349,7 +1347,7 @@ export const getSnapLinesAtPointer = (
horizontalSnapLines.push({
type: "pointer",
points: [corner, [pointer.x, corner[1]]],
points: [corner, point(pointer.x, corner[1])],
direction: "horizontal",
});
@ -1386,3 +1384,18 @@ export const isActiveToolNonLinearSnappable = (
activeToolType === TOOL_TYPE.text
);
};
// TODO: Rounding this point causes some shake when free drawing
export const getGridPoint = (
x: number,
y: number,
gridSize: NullableGridSize,
): [number, number] => {
if (gridSize) {
return [
Math.round(x / gridSize) * gridSize,
Math.round(y / gridSize) * gridSize,
];
}
return [x, y];
};

18
packages/excalidraw/tests/binding.test.tsx
View File

@ -7,6 +7,7 @@ import { API } from "./helpers/api";
import { KEYS } from "../keys";
import { actionWrapTextInContainer } from "../actions/actionBoundText";
import { arrayToMap } from "../utils";
import { point } from "../../math";
const { h } = window;
@ -31,12 +32,7 @@ describe("element binding", () => {
y: 0,
width: 100,
height: 1,
points: [
[0, 0],
[0, 0],
[100, 0],
[100, 0],
],
points: [point(0, 0), point(0, 0), point(100, 0), point(100, 0)],
});
API.setElements([rect, arrow]);
expect(arrow.startBinding).toBe(null);
@ -314,10 +310,7 @@ describe("element binding", () => {
const arrow1 = API.createElement({
type: "arrow",
id: "arrow1",
points: [
[0, 0],
[0, -87.45777932247563],
],
points: [point(0, 0), point(0, -87.45777932247563)],
startBinding: {
elementId: "rectangle1",
focus: 0.2,
@ -335,10 +328,7 @@ describe("element binding", () => {
const arrow2 = API.createElement({
type: "arrow",
id: "arrow2",
points: [
[0, 0],
[0, -87.45777932247563],
],
points: [point(0, 0), point(0, -87.45777932247563)],
startBinding: {
elementId: "text1",
focus: 0.2,

3
packages/excalidraw/tests/fixtures/elementFixture.ts vendored
View File

@ -1,3 +1,4 @@
import type { Radians } from "../../../math";
import { DEFAULT_FONT_FAMILY } from "../../constants";
import type { ExcalidrawElement } from "../../element/types";
@ -7,7 +8,7 @@ const elementBase: Omit<ExcalidrawElement, "type"> = {
y: 237,
width: 214,
height: 214,
angle: 0,
angle: 0 as Radians,
strokeColor: "#000000",
backgroundColor: "#15aabf",
fillStyle: "hachure",

50
packages/excalidraw/tests/flip.test.tsx
View File

@ -28,6 +28,8 @@ import { KEYS } from "../keys";
import { getBoundTextElementPosition } from "../element/textElement";
import { createPasteEvent } from "../clipboard";
import { arrayToMap, cloneJSON } from "../utils";
import type { LocalPoint } from "../../math";
import { point, type Radians } from "../../math";
const { h } = window;
const mouse = new Pointer("mouse");
@ -131,7 +133,7 @@ const createLinearElementWithCurveInsideMinMaxPoints = (
y: -2412.5069664197654,
width: 1750.4888916015625,
height: 410.51605224609375,
angle: 0,
angle: 0 as Radians,
strokeColor: "#000000",
backgroundColor: "#fa5252",
fillStyle: "hachure",
@ -145,9 +147,9 @@ const createLinearElementWithCurveInsideMinMaxPoints = (
link: null,
locked: false,
points: [
[0, 0],
[-922.4761962890625, 300.3277587890625],
[828.0126953125, 410.51605224609375],
point<LocalPoint>(0, 0),
point<LocalPoint>(-922.4761962890625, 300.3277587890625),
point<LocalPoint>(828.0126953125, 410.51605224609375),
],
});
};
@ -423,8 +425,8 @@ describe("arrow", () => {
});
it("flips a rotated arrow horizontally with line inside min/max points bounds", async () => {
const originalAngle = Math.PI / 4;
const expectedAngle = (7 * Math.PI) / 4;
const originalAngle = (Math.PI / 4) as Radians;
const expectedAngle = ((7 * Math.PI) / 4) as Radians;
const line = createLinearElementWithCurveInsideMinMaxPoints("arrow");
API.setElements([line]);
API.setAppState({
@ -444,8 +446,8 @@ describe("arrow", () => {
});
it("flips a rotated arrow vertically with line inside min/max points bounds", async () => {
const originalAngle = Math.PI / 4;
const expectedAngle = (7 * Math.PI) / 4;
const originalAngle = (Math.PI / 4) as Radians;
const expectedAngle = ((7 * Math.PI) / 4) as Radians;
const line = createLinearElementWithCurveInsideMinMaxPoints("arrow");
API.setElements([line]);
API.setAppState({
@ -477,8 +479,8 @@ describe("arrow", () => {
//TODO: elements with curve outside minMax points have a wrong bounding box!!!
it.skip("flips a rotated arrow horizontally with line outside min/max points bounds", async () => {
const originalAngle = Math.PI / 4;
const expectedAngle = (7 * Math.PI) / 4;
const originalAngle = (Math.PI / 4) as Radians;
const expectedAngle = ((7 * Math.PI) / 4) as Radians;
const line = createLinearElementsWithCurveOutsideMinMaxPoints("arrow");
API.updateElement(line, { angle: originalAngle });
API.setElements([line]);
@ -501,8 +503,8 @@ describe("arrow", () => {
//TODO: elements with curve outside minMax points have a wrong bounding box!!!
it.skip("flips a rotated arrow vertically with line outside min/max points bounds", async () => {
const originalAngle = Math.PI / 4;
const expectedAngle = (7 * Math.PI) / 4;
const originalAngle = (Math.PI / 4) as Radians;
const expectedAngle = ((7 * Math.PI) / 4) as Radians;
const line = createLinearElementsWithCurveOutsideMinMaxPoints("arrow");
API.updateElement(line, { angle: originalAngle });
API.setElements([line]);
@ -585,8 +587,8 @@ describe("line", () => {
//TODO: elements with curve outside minMax points have a wrong bounding box
it.skip("flips a rotated line horizontally with line outside min/max points bounds", async () => {
const originalAngle = Math.PI / 4;
const expectedAngle = (7 * Math.PI) / 4;
const originalAngle = (Math.PI / 4) as Radians;
const expectedAngle = ((7 * Math.PI) / 4) as Radians;
const line = createLinearElementsWithCurveOutsideMinMaxPoints("line");
API.updateElement(line, { angle: originalAngle });
API.setElements([line]);
@ -600,8 +602,8 @@ describe("line", () => {
//TODO: elements with curve outside minMax points have a wrong bounding box
it.skip("flips a rotated line vertically with line outside min/max points bounds", async () => {
const originalAngle = Math.PI / 4;
const expectedAngle = (7 * Math.PI) / 4;
const originalAngle = (Math.PI / 4) as Radians;
const expectedAngle = ((7 * Math.PI) / 4) as Radians;
const line = createLinearElementsWithCurveOutsideMinMaxPoints("line");
API.updateElement(line, { angle: originalAngle });
API.setElements([line]);
@ -619,8 +621,8 @@ describe("line", () => {
});
it("flips a rotated line horizontally with line inside min/max points bounds", async () => {
const originalAngle = Math.PI / 4;
const expectedAngle = (7 * Math.PI) / 4;
const originalAngle = (Math.PI / 4) as Radians;
const expectedAngle = ((7 * Math.PI) / 4) as Radians;
const line = createLinearElementWithCurveInsideMinMaxPoints("line");
API.setElements([line]);
API.setAppState({
@ -640,8 +642,8 @@ describe("line", () => {
});
it("flips a rotated line vertically with line inside min/max points bounds", async () => {
const originalAngle = Math.PI / 4;
const expectedAngle = (7 * Math.PI) / 4;
const originalAngle = (Math.PI / 4) as Radians;
const expectedAngle = ((7 * Math.PI) / 4) as Radians;
const line = createLinearElementWithCurveInsideMinMaxPoints("line");
API.setElements([line]);
API.setAppState({
@ -772,8 +774,8 @@ describe("image", () => {
});
it("flips an rotated image horizontally correctly", async () => {
const originalAngle = Math.PI / 4;
const expectedAngle = (7 * Math.PI) / 4;
const originalAngle = (Math.PI / 4) as Radians;
const expectedAngle = ((7 * Math.PI) / 4) as Radians;
//paste image
await createImage();
await waitFor(() => {
@ -790,8 +792,8 @@ describe("image", () => {
});
it("flips an rotated image vertically correctly", async () => {
const originalAngle = Math.PI / 4;
const expectedAngle = (7 * Math.PI) / 4;
const originalAngle = (Math.PI / 4) as Radians;
const expectedAngle = ((7 * Math.PI) / 4) as Radians;
//paste image
await createImage();
await waitFor(() => {

15
packages/excalidraw/tests/helpers/api.ts
View File

@ -27,7 +27,7 @@ import {
newImageElement,
newMagicFrameElement,
} from "../../element/newElement";
import type { AppState, Point } from "../../types";
import type { AppState } from "../../types";
import { getSelectedElements } from "../../scene/selection";
import { isLinearElementType } from "../../element/typeChecks";
import type { Mutable } from "../../utility-types";
@ -36,6 +36,7 @@ import type App from "../../components/App";
import { createTestHook } from "../../components/App";
import type { Action } from "../../actions/types";
import { mutateElement } from "../../element/mutateElement";
import { point, type LocalPoint, type Radians } from "../../../math";
const readFile = util.promisify(fs.readFile);
// so that window.h is available when App.tsx is not imported as well.
@ -171,7 +172,7 @@ export class API {
containerId?: T extends "text"
? ExcalidrawTextElement["containerId"]
: never;
points?: T extends "arrow" | "line" ? readonly Point[] : never;
points?: T extends "arrow" | "line" ? readonly LocalPoint[] : never;
locked?: boolean;
fileId?: T extends "image" ? string : never;
scale?: T extends "image" ? ExcalidrawImageElement["scale"] : never;
@ -218,7 +219,7 @@ export class API {
y,
frameId: rest.frameId ?? null,
index: rest.index ?? null,
angle: rest.angle ?? 0,
angle: (rest.angle ?? 0) as Radians,
strokeColor: rest.strokeColor ?? appState.currentItemStrokeColor,
backgroundColor:
rest.backgroundColor ?? appState.currentItemBackgroundColor,
@ -293,8 +294,8 @@ export class API {
height,
type,
points: rest.points ?? [
[0, 0],
[100, 100],
point<LocalPoint>(0, 0),
point<LocalPoint>(100, 100),
],
elbowed: rest.elbowed ?? false,
});
@ -306,8 +307,8 @@ export class API {
height,
type,
points: rest.points ?? [
[0, 0],
[100, 100],
point<LocalPoint>(0, 0),
point<LocalPoint>(100, 100),
],
});
break;

31
packages/excalidraw/tests/helpers/ui.ts
View File

@ -1,4 +1,4 @@
import type { Point, ToolType } from "../../types";
import type { ToolType } from "../../types";
import type {
ExcalidrawElement,
ExcalidrawLinearElement,
@ -30,10 +30,11 @@ import {
isFrameLikeElement,
} from "../../element/typeChecks";
import { getCommonBounds, getElementPointsCoords } from "../../element/bounds";
import { rotatePoint } from "../../math";
import { getTextEditor } from "../queries/dom";
import { arrayToMap } from "../../utils";
import { createTestHook } from "../../components/App";
import type { GlobalPoint, LocalPoint, Radians } from "../../../math";
import { point, pointRotateRads } from "../../../math";
// so that window.h is available when App.tsx is not imported as well.
createTestHook();
@ -131,27 +132,29 @@ export class Keyboard {
};
}
const getElementPointForSelection = (element: ExcalidrawElement): Point => {
const getElementPointForSelection = (
element: ExcalidrawElement,
): GlobalPoint => {
const { x, y, width, height, angle } = element;
const target: Point = [
const target = point<GlobalPoint>(
x +
(isLinearElement(element) || isFreeDrawElement(element) ? 0 : width / 2),
y,
];
let center: Point;
);
let center: GlobalPoint;
if (isLinearElement(element)) {
const bounds = getElementPointsCoords(element, element.points);
center = [(bounds[0] + bounds[2]) / 2, (bounds[1] + bounds[3]) / 2];
center = point((bounds[0] + bounds[2]) / 2, (bounds[1] + bounds[3]) / 2);
} else {
center = [x + width / 2, y + height / 2];
center = point(x + width / 2, y + height / 2);
}
if (isTextElement(element)) {
return center;
}
return rotatePoint(target, center, angle);
return pointRotateRads(target, center, angle);
};
export class Pointer {
@ -328,7 +331,7 @@ const transform = (
const isFrameSelected = elements.some(isFrameLikeElement);
const transformHandles = getTransformHandlesFromCoords(
[x1, y1, x2, y2, (x1 + x2) / 2, (y1 + y2) / 2],
0,
0 as Radians,
h.state.zoom,
"mouse",
isFrameSelected ? OMIT_SIDES_FOR_FRAME : OMIT_SIDES_FOR_MULTIPLE_ELEMENTS,
@ -450,7 +453,7 @@ export class UI {
width?: number;
height?: number;
angle?: number;
points?: T extends "line" | "arrow" | "freedraw" ? Point[] : never;
points?: T extends "line" | "arrow" | "freedraw" ? LocalPoint[] : never;
} = {},
): Element<T> & {
/** Returns the actual, current element from the elements array, instead
@ -459,9 +462,9 @@ export class UI {
} {
const width = initialWidth ?? initialHeight ?? size;
const height = initialHeight ?? size;
const points: Point[] = initialPoints ?? [
[0, 0],
[width, height],
const points: LocalPoint[] = initialPoints ?? [
point(0, 0),
point(width, height),
];
UI.clickTool(type);

24
packages/excalidraw/tests/history.test.tsx
View File

@ -44,6 +44,8 @@ import { queryByText } from "@testing-library/react";
import { HistoryEntry } from "../history";
import { AppStateChange, ElementsChange } from "../change";
import { Snapshot, StoreAction } from "../store";
import type { LocalPoint, Radians } from "../../math";
import { point } from "../../math";
const { h } = window;
@ -2038,9 +2040,9 @@ describe("history", () => {
width: 178.9000000000001,
height: 236.10000000000002,
points: [
[0, 0],
[178.9000000000001, 0],
[178.9000000000001, 236.10000000000002],
point(0, 0),
point(178.9000000000001, 0),
point(178.9000000000001, 236.10000000000002),
],
startBinding: {
elementId: "KPrBI4g_v9qUB1XxYLgSz",
@ -2156,12 +2158,12 @@ describe("history", () => {
elements: [
newElementWith(h.elements[0] as ExcalidrawLinearElement, {
points: [
[0, 0],
[5, 5],
[10, 10],
[15, 15],
[20, 20],
],
point(0, 0),
point(5, 5),
point(10, 10),
point(15, 15),
point(20, 20),
] as LocalPoint[],
}),
],
storeAction: StoreAction.UPDATE,
@ -4003,7 +4005,7 @@ describe("history", () => {
newElementWith(h.elements[0], {
x: 200,
y: 200,
angle: 90,
angle: 90 as Radians,
}),
],
storeAction: StoreAction.CAPTURE,
@ -4121,7 +4123,7 @@ describe("history", () => {
newElementWith(h.elements[0], {
x: 205,
y: 205,
angle: 90,
angle: 90 as Radians,
}),
],
storeAction: StoreAction.CAPTURE,

151
packages/excalidraw/tests/linearElementEditor.test.tsx
View File

@ -8,7 +8,6 @@ import type {
SceneElementsMap,
} from "../element/types";
import { Excalidraw, mutateElement } from "../index";
import { centerPoint } from "../math";
import { reseed } from "../random";
import * as StaticScene from "../renderer/staticScene";
import * as InteractiveCanvas from "../renderer/interactiveScene";
@ -16,7 +15,6 @@ import * as InteractiveCanvas from "../renderer/interactiveScene";
import { Keyboard, Pointer, UI } from "./helpers/ui";
import { screen, render, fireEvent, GlobalTestState } from "./test-utils";
import { API } from "../tests/helpers/api";
import type { Point } from "../types";
import { KEYS } from "../keys";
import { LinearElementEditor } from "../element/linearElementEditor";
import { act, queryByTestId, queryByText } from "@testing-library/react";
@ -29,6 +27,8 @@ import * as textElementUtils from "../element/textElement";
import { ROUNDNESS, VERTICAL_ALIGN } from "../constants";
import { vi } from "vitest";
import { arrayToMap } from "../utils";
import type { GlobalPoint } from "../../math";
import { pointCenter, point } from "../../math";
const renderInteractiveScene = vi.spyOn(
InteractiveCanvas,
@ -57,9 +57,9 @@ describe("Test Linear Elements", () => {
interactiveCanvas = container.querySelector("canvas.interactive")!;
});
const p1: Point = [20, 20];
const p2: Point = [60, 20];
const midpoint = centerPoint(p1, p2);
const p1 = point<GlobalPoint>(20, 20);
const p2 = point<GlobalPoint>(60, 20);
const midpoint = pointCenter<GlobalPoint>(p1, p2);
const delta = 50;
const mouse = new Pointer("mouse");
@ -75,10 +75,7 @@ describe("Test Linear Elements", () => {
height: 0,
type,
roughness,
points: [
[0, 0],
[p2[0] - p1[0], p2[1] - p1[1]],
],
points: [point(0, 0), point(p2[0] - p1[0], p2[1] - p1[1])],
roundness,
});
API.setElements([line]);
@ -102,9 +99,9 @@ describe("Test Linear Elements", () => {
type,
roughness,
points: [
[0, 0],
[p3[0], p3[1]],
[p2[0] - p1[0], p2[1] - p1[1]],
point(0, 0),
point(p3[0], p3[1]),
point(p2[0] - p1[0], p2[1] - p1[1]),
],
roundness,
});
@ -129,7 +126,7 @@ describe("Test Linear Elements", () => {
expect(h.state.editingLinearElement?.elementId).toEqual(line.id);
};
const drag = (startPoint: Point, endPoint: Point) => {
const drag = (startPoint: GlobalPoint, endPoint: GlobalPoint) => {
fireEvent.pointerDown(interactiveCanvas, {
clientX: startPoint[0],
clientY: startPoint[1],
@ -144,7 +141,7 @@ describe("Test Linear Elements", () => {
});
};
const deletePoint = (point: Point) => {
const deletePoint = (point: GlobalPoint) => {
fireEvent.pointerDown(interactiveCanvas, {
clientX: point[0],
clientY: point[1],
@ -164,7 +161,7 @@ describe("Test Linear Elements", () => {
expect(line.points.length).toEqual(2);
mouse.clickAt(midpoint[0], midpoint[1]);
drag(midpoint, [midpoint[0] + 1, midpoint[1] + 1]);
drag(midpoint, point(midpoint[0] + 1, midpoint[1] + 1));
expect(line.points.length).toEqual(2);
@ -172,7 +169,7 @@ describe("Test Linear Elements", () => {
expect(line.y).toBe(originalY);
expect(line.points.length).toEqual(2);
drag(midpoint, [midpoint[0] + delta, midpoint[1] + delta]);
drag(midpoint, point(midpoint[0] + delta, midpoint[1] + delta));
expect(line.x).toBe(originalX);
expect(line.y).toBe(originalY);
expect(line.points.length).toEqual(3);
@ -187,7 +184,7 @@ describe("Test Linear Elements", () => {
expect((h.elements[0] as ExcalidrawLinearElement).points.length).toEqual(2);
// drag line from midpoint
drag(midpoint, [midpoint[0] + delta, midpoint[1] + delta]);
drag(midpoint, point(midpoint[0] + delta, midpoint[1] + delta));
expect(renderInteractiveScene.mock.calls.length).toMatchInlineSnapshot(`9`);
expect(renderStaticScene.mock.calls.length).toMatchInlineSnapshot(`7`);
expect(line.points.length).toEqual(3);
@ -251,7 +248,7 @@ describe("Test Linear Elements", () => {
mouse.clickAt(midpoint[0], midpoint[1]);
expect(line.points.length).toEqual(2);
drag(midpoint, [midpoint[0] + 1, midpoint[1] + 1]);
drag(midpoint, point(midpoint[0] + 1, midpoint[1] + 1));
expect(line.x).toBe(originalX);
expect(line.y).toBe(originalY);
expect(line.points.length).toEqual(3);
@ -264,7 +261,7 @@ describe("Test Linear Elements", () => {
enterLineEditingMode(line);
// drag line from midpoint
drag(midpoint, [midpoint[0] + delta, midpoint[1] + delta]);
drag(midpoint, point(midpoint[0] + delta, midpoint[1] + delta));
expect(renderInteractiveScene.mock.calls.length).toMatchInlineSnapshot(
`12`,
);
@ -356,10 +353,13 @@ describe("Test Linear Elements", () => {
h.state,
);
const startPoint = centerPoint(points[0], midPoints[0] as Point);
const startPoint = pointCenter(points[0], midPoints[0]!);
const deltaX = 50;
const deltaY = 20;
const endPoint: Point = [startPoint[0] + deltaX, startPoint[1] + deltaY];
const endPoint = point<GlobalPoint>(
startPoint[0] + deltaX,
startPoint[1] + deltaY,
);
// Move the element
drag(startPoint, endPoint);
@ -399,8 +399,8 @@ describe("Test Linear Elements", () => {
// This is the expected midpoint for line with round edge
// hence hardcoding it so if later some bug is introduced
// this will fail and we can fix it
const firstSegmentMidpoint: Point = [55, 45];
const lastSegmentMidpoint: Point = [75, 40];
const firstSegmentMidpoint = point<GlobalPoint>(55, 45);
const lastSegmentMidpoint = point<GlobalPoint>(75, 40);
let line: ExcalidrawLinearElement;
@ -414,17 +414,20 @@ describe("Test Linear Elements", () => {
it("should allow dragging lines from midpoints in between segments", async () => {
// drag line via first segment midpoint
drag(firstSegmentMidpoint, [
drag(
firstSegmentMidpoint,
point(
firstSegmentMidpoint[0] + delta,
firstSegmentMidpoint[1] + delta,
]);
),
);
expect(line.points.length).toEqual(4);
// drag line from last segment midpoint
drag(lastSegmentMidpoint, [
lastSegmentMidpoint[0] + delta,
lastSegmentMidpoint[1] + delta,
]);
drag(
lastSegmentMidpoint,
point(lastSegmentMidpoint[0] + delta, lastSegmentMidpoint[1] + delta),
);
expect(renderInteractiveScene.mock.calls.length).toMatchInlineSnapshot(
`16`,
@ -472,10 +475,10 @@ describe("Test Linear Elements", () => {
h.state,
);
const hitCoords: Point = [points[0][0], points[0][1]];
const hitCoords = point<GlobalPoint>(points[0][0], points[0][1]);
// Drag from first point
drag(hitCoords, [hitCoords[0] - delta, hitCoords[1] - delta]);
drag(hitCoords, point(hitCoords[0] - delta, hitCoords[1] - delta));
expect(renderInteractiveScene.mock.calls.length).toMatchInlineSnapshot(
`12`,
@ -513,10 +516,10 @@ describe("Test Linear Elements", () => {
h.state,
);
const hitCoords: Point = [points[0][0], points[0][1]];
const hitCoords = point<GlobalPoint>(points[0][0], points[0][1]);
// Drag from first point
drag(hitCoords, [hitCoords[0] + delta, hitCoords[1] + delta]);
drag(hitCoords, point(hitCoords[0] + delta, hitCoords[1] + delta));
expect(renderInteractiveScene.mock.calls.length).toMatchInlineSnapshot(
`12`,
@ -551,10 +554,10 @@ describe("Test Linear Elements", () => {
);
// dragging line from last segment midpoint
drag(lastSegmentMidpoint, [
lastSegmentMidpoint[0] + 50,
lastSegmentMidpoint[1] + 50,
]);
drag(
lastSegmentMidpoint,
point(lastSegmentMidpoint[0] + 50, lastSegmentMidpoint[1] + 50),
);
expect(line.points.length).toEqual(4);
const midPoints = LinearElementEditor.getEditorMidPoints(
@ -586,12 +589,14 @@ describe("Test Linear Elements", () => {
// This is the expected midpoint for line with round edge
// hence hardcoding it so if later some bug is introduced
// this will fail and we can fix it
const firstSegmentMidpoint: Point = [
55.9697848965255, 47.442326230998205,
];
const lastSegmentMidpoint: Point = [
76.08587175006699, 43.294165939653226,
];
const firstSegmentMidpoint = point<GlobalPoint>(
55.9697848965255,
47.442326230998205,
);
const lastSegmentMidpoint = point<GlobalPoint>(
76.08587175006699,
43.294165939653226,
);
let line: ExcalidrawLinearElement;
beforeEach(() => {
@ -605,17 +610,20 @@ describe("Test Linear Elements", () => {
it("should allow dragging lines from midpoints in between segments", async () => {
// drag line from first segment midpoint
drag(firstSegmentMidpoint, [
drag(
firstSegmentMidpoint,
point(
firstSegmentMidpoint[0] + delta,
firstSegmentMidpoint[1] + delta,
]);
),
);
expect(line.points.length).toEqual(4);
// drag line from last segment midpoint
drag(lastSegmentMidpoint, [
lastSegmentMidpoint[0] + delta,
lastSegmentMidpoint[1] + delta,
]);
drag(
lastSegmentMidpoint,
point(lastSegmentMidpoint[0] + delta, lastSegmentMidpoint[1] + delta),
);
expect(renderInteractiveScene.mock.calls.length).toMatchInlineSnapshot(
`16`,
);
@ -661,10 +669,10 @@ describe("Test Linear Elements", () => {
h.state,
);
const hitCoords: Point = [points[0][0], points[0][1]];
const hitCoords = point<GlobalPoint>(points[0][0], points[0][1]);
// Drag from first point
drag(hitCoords, [hitCoords[0] - delta, hitCoords[1] - delta]);
drag(hitCoords, point(hitCoords[0] - delta, hitCoords[1] - delta));
const newPoints = LinearElementEditor.getPointsGlobalCoordinates(
line,
@ -709,10 +717,10 @@ describe("Test Linear Elements", () => {
h.state,
);
const hitCoords: Point = [points[0][0], points[0][1]];
const hitCoords = point<GlobalPoint>(points[0][0], points[0][1]);
// Drag from first point
drag(hitCoords, [hitCoords[0] + delta, hitCoords[1] + delta]);
drag(hitCoords, point(hitCoords[0] + delta, hitCoords[1] + delta));
expect(renderInteractiveScene.mock.calls.length).toMatchInlineSnapshot(
`12`,
@ -741,10 +749,10 @@ describe("Test Linear Elements", () => {
it("should update all the midpoints when a point is deleted", async () => {
const elementsMap = arrayToMap(h.elements);
drag(lastSegmentMidpoint, [
lastSegmentMidpoint[0] + delta,
lastSegmentMidpoint[1] + delta,
]);
drag(
lastSegmentMidpoint,
point(lastSegmentMidpoint[0] + delta, lastSegmentMidpoint[1] + delta),
);
expect(line.points.length).toEqual(4);
const midPoints = LinearElementEditor.getEditorMidPoints(
@ -803,8 +811,11 @@ describe("Test Linear Elements", () => {
API.setSelectedElements([line]);
enterLineEditingMode(line, true);
drag(
[line.points[0][0] + line.x, line.points[0][1] + line.y],
[dragEndPositionOffset[0] + line.x, dragEndPositionOffset[1] + line.y],
point(line.points[0][0] + line.x, line.points[0][1] + line.y),
point(
dragEndPositionOffset[0] + line.x,
dragEndPositionOffset[1] + line.y,
),
);
expect(line.points).toMatchInlineSnapshot(`
[
@ -916,14 +927,18 @@ describe("Test Linear Elements", () => {
// This is the expected midpoint for line with round edge
// hence hardcoding it so if later some bug is introduced
// this will fail and we can fix it
const firstSegmentMidpoint: Point = [
55.9697848965255, 47.442326230998205,
];
const firstSegmentMidpoint = point<GlobalPoint>(
55.9697848965255,
47.442326230998205,
);
// drag line from first segment midpoint
drag(firstSegmentMidpoint, [
drag(
firstSegmentMidpoint,
point(
firstSegmentMidpoint[0] + delta,
firstSegmentMidpoint[1] + delta,
]);
),
);
const position = LinearElementEditor.getBoundTextElementPosition(
container,
@ -1136,7 +1151,7 @@ describe("Test Linear Elements", () => {
);
// Drag from last point
drag(points[1], [points[1][0] + 300, points[1][1]]);
drag(points[1], point(points[1][0] + 300, points[1][1]));
expect({ width: container.width, height: container.height })
.toMatchInlineSnapshot(`
@ -1335,14 +1350,14 @@ describe("Test Linear Elements", () => {
[
{
index: 0,
point: [line.points[0][0] + 10, line.points[0][1] + 10],
point: point(line.points[0][0] + 10, line.points[0][1] + 10),
},
{
index: line.points.length - 1,
point: [
point: point(
line.points[line.points.length - 1][0] - 10,
line.points[line.points.length - 1][1] - 10,
],
),
},
],
new Map() as SceneElementsMap,

68
packages/excalidraw/tests/resize.test.tsx
View File

@ -7,7 +7,6 @@ import type {
ExcalidrawFreeDrawElement,
ExcalidrawLinearElement,
} from "../element/types";
import type { Point } from "../types";
import type { Bounds } from "../element/bounds";
import { getElementPointsCoords } from "../element/bounds";
import { Excalidraw } from "../index";
@ -16,6 +15,8 @@ import { KEYS } from "../keys";
import { isLinearElement } from "../element/typeChecks";
import { LinearElementEditor } from "../element/linearElementEditor";
import { arrayToMap } from "../utils";
import type { LocalPoint } from "../../math";
import { point } from "../../math";
ReactDOM.unmountComponentAtNode(document.getElementById("root")!);
@ -217,18 +218,13 @@ describe("generic element", () => {
});
describe.each(["line", "freedraw"] as const)("%s element", (type) => {
const points: Record<typeof type, Point[]> = {
line: [
[0, 0],
[60, -20],
[20, 40],
[-40, 0],
],
const points: Record<typeof type, LocalPoint[]> = {
line: [point(0, 0), point(60, -20), point(20, 40), point(-40, 0)],
freedraw: [
[0, 0],
[-2.474600807561444, 41.021700699972],
[3.6627956000014024, 47.84174560617245],
[40.495224145598115, 47.15909710753482],
point(0, 0),
point(-2.474600807561444, 41.021700699972),
point(3.6627956000014024, 47.84174560617245),
point(40.495224145598115, 47.15909710753482),
],
};
@ -296,11 +292,11 @@ describe("arrow element", () => {
it("resizes with a label", async () => {
const arrow = UI.createElement("arrow", {
points: [
[0, 0],
[40, 140],
[80, 60], // label's anchor
[180, 20],
[200, 120],
point(0, 0),
point(40, 140),
point(80, 60), // label's anchor
point(180, 20),
point(200, 120),
],
});
const label = await UI.editText(arrow, "Hello");
@ -694,24 +690,24 @@ describe("multiple selection", () => {
x: 60,
y: 40,
points: [
[0, 0],
[-40, 40],
[-60, 0],
[0, -40],
[40, 20],
[0, 40],
point(0, 0),
point(-40, 40),
point(-60, 0),
point(0, -40),
point(40, 20),
point(0, 40),
],
});
const freedraw = UI.createElement("freedraw", {
x: 63.56072661326618,
y: 100,
points: [
[0, 0],
[-43.56072661326618, 18.15048126846341],
[-43.56072661326618, 29.041198460587566],
[-38.115368017204105, 42.652452795512204],
[-19.964886748740696, 66.24829266003775],
[19.056612930986716, 77.1390098521619],
point(0, 0),
point(-43.56072661326618, 18.15048126846341),
point(-43.56072661326618, 29.041198460587566),
point(-38.115368017204105, 42.652452795512204),
point(-19.964886748740696, 66.24829266003775),
point(19.056612930986716, 77.1390098521619),
],
});
@ -1050,13 +1046,13 @@ describe("multiple selection", () => {
x: 60,
y: 0,
points: [
[0, 0],
[-40, 40],
[-20, 60],
[20, 20],
[40, 40],
[-20, 100],
[-60, 60],
point(0, 0),
point(-40, 40),
point(-20, 60),
point(20, 20),
point(40, 40),
point(-20, 100),
point(-60, 60),
],
});

3
packages/excalidraw/types.ts
View File

@ -24,7 +24,6 @@ import type {
ExcalidrawNonSelectionElement,
} from "./element/types";
import type { Action } from "./actions/types";
import type { Point as RoughPoint } from "roughjs/bin/geometry";
import type { LinearElementEditor } from "./element/linearElementEditor";
import type { SuggestedBinding } from "./element/binding";
import type { ImportedDataState } from "./data/types";
@ -43,8 +42,6 @@ import type { SnapLine } from "./snapping";
import type { Merge, MaybePromise, ValueOf, MakeBrand } from "./utility-types";
import type { StoreActionType } from "./store";
export type Point = Readonly<RoughPoint>;
export type SocketId = string & { _brand: "SocketId" };
export type Collaborator = Readonly<{

6
packages/excalidraw/utils.ts
View File

@ -1,3 +1,4 @@
import { average } from "../math";
import { COLOR_PALETTE } from "./colors";
import type { EVENT } from "./constants";
import {
@ -992,10 +993,6 @@ export const isMemberOf = <T extends string>(
export const cloneJSON = <T>(obj: T): T => JSON.parse(JSON.stringify(obj));
export const isFiniteNumber = (value: any): value is number => {
return typeof value === "number" && Number.isFinite(value);
};
export const updateStable = <T extends any[] | Record<string, any>>(
prevValue: T,
nextValue: T,
@ -1079,7 +1076,6 @@ export function addEventListener(
};
}
const average = (a: number, b: number) => (a + b) / 2;
export function getSvgPathFromStroke(points: number[][], closed = true) {
const len = points.length;

96
packages/excalidraw/visualdebug.ts
View File

@ -1,7 +1,7 @@
import { isLineSegment, lineSegment, point, type GlobalPoint } from "../math";
import type { LineSegment } from "../utils";
import type { BoundingBox, Bounds } from "./element/bounds";
import { isBounds, isLineSegment } from "./element/typeChecks";
import type { Point } from "./types";
import { isBounds } from "./element/typeChecks";
// The global data holder to collect the debug operations
declare global {
@ -15,18 +15,22 @@ declare global {
export type DebugElement = {
color: string;
data: LineSegment;
data: LineSegment<GlobalPoint>;
permanent: boolean;
};
export const debugDrawLine = (
segment: LineSegment | LineSegment[],
segment: LineSegment<GlobalPoint> | LineSegment<GlobalPoint>[],
opts?: {
color?: string;
permanent?: boolean;
},
) => {
(isLineSegment(segment) ? [segment] : segment).forEach((data) =>
const segments = (
isLineSegment(segment) ? [segment] : segment
) as LineSegment<GlobalPoint>[];
segments.forEach((data) =>
addToCurrentFrame({
color: opts?.color ?? "red",
data,
@ -36,7 +40,7 @@ export const debugDrawLine = (
};
export const debugDrawPoint = (
point: Point,
p: GlobalPoint,
opts?: {
color?: string;
permanent?: boolean;
@ -47,20 +51,20 @@ export const debugDrawPoint = (
const yOffset = opts?.fuzzy ? Math.random() * 3 : 0;
debugDrawLine(
[
[point[0] + xOffset - 10, point[1] + yOffset - 10],
[point[0] + xOffset + 10, point[1] + yOffset + 10],
],
lineSegment(
point<GlobalPoint>(p[0] + xOffset - 10, p[1] + yOffset - 10),
point<GlobalPoint>(p[0] + xOffset + 10, p[1] + yOffset + 10),
),
{
color: opts?.color ?? "cyan",
permanent: opts?.permanent,
},
);
debugDrawLine(
[
[point[0] + xOffset - 10, point[1] + yOffset + 10],
[point[0] + xOffset + 10, point[1] + yOffset - 10],
],
lineSegment(
point<GlobalPoint>(p[0] + xOffset - 10, p[1] + yOffset + 10),
point<GlobalPoint>(p[0] + xOffset + 10, p[1] + yOffset - 10),
),
{
color: opts?.color ?? "cyan",
permanent: opts?.permanent,
@ -78,22 +82,22 @@ export const debugDrawBoundingBox = (
(Array.isArray(box) ? box : [box]).forEach((bbox) =>
debugDrawLine(
[
[
[bbox.minX, bbox.minY],
[bbox.maxX, bbox.minY],
],
[
[bbox.maxX, bbox.minY],
[bbox.maxX, bbox.maxY],
],
[
[bbox.maxX, bbox.maxY],
[bbox.minX, bbox.maxY],
],
[
[bbox.minX, bbox.maxY],
[bbox.minX, bbox.minY],
],
lineSegment(
point<GlobalPoint>(bbox.minX, bbox.minY),
point<GlobalPoint>(bbox.maxX, bbox.minY),
),
lineSegment(
point<GlobalPoint>(bbox.maxX, bbox.minY),
point<GlobalPoint>(bbox.maxX, bbox.maxY),
),
lineSegment(
point<GlobalPoint>(bbox.maxX, bbox.maxY),
point<GlobalPoint>(bbox.minX, bbox.maxY),
),
lineSegment(
point<GlobalPoint>(bbox.minX, bbox.maxY),
point<GlobalPoint>(bbox.minX, bbox.minY),
),
],
{
color: opts?.color ?? "cyan",
@ -113,22 +117,22 @@ export const debugDrawBounds = (
(isBounds(box) ? [box] : box).forEach((bbox) =>
debugDrawLine(
[
[
[bbox[0], bbox[1]],
[bbox[2], bbox[1]],
],
[
[bbox[2], bbox[1]],
[bbox[2], bbox[3]],
],
[
[bbox[2], bbox[3]],
[bbox[0], bbox[3]],
],
[
[bbox[0], bbox[3]],
[bbox[0], bbox[1]],
],
lineSegment(
point<GlobalPoint>(bbox[0], bbox[1]),
point<GlobalPoint>(bbox[2], bbox[1]),
),
lineSegment(
point<GlobalPoint>(bbox[2], bbox[1]),
point<GlobalPoint>(bbox[2], bbox[3]),
),
lineSegment(
point<GlobalPoint>(bbox[2], bbox[3]),
point<GlobalPoint>(bbox[0], bbox[3]),
),
lineSegment(
point<GlobalPoint>(bbox[0], bbox[3]),
point<GlobalPoint>(bbox[0], bbox[1]),
),
],
{
color: opts?.color ?? "green",

0
packages/math/CHANGELOG.md Normal file
View File

21
packages/math/README.md Normal file
View File

@ -0,0 +1,21 @@
# @excalidraw/math
## Install
```bash
npm install @excalidraw/math
```
If you prefer Yarn over npm, use this command to install the Excalidraw utils package:
```bash
yarn add @excalidraw/math
```
With PNPM, similarly install the package with this command:
```bash
pnpm add @excalidraw/math
```
## API

47
packages/math/angle.ts Normal file
View File

@ -0,0 +1,47 @@
import type {
Degrees,
GlobalPoint,
LocalPoint,
PolarCoords,
Radians,
} from "./types";
import { PRECISION } from "./utils";
// TODO: Simplify with modulo and fix for angles beyond 4*Math.PI and - 4*Math.PI
export const normalizeRadians = (angle: Radians): Radians => {
if (angle < 0) {
return (angle + 2 * Math.PI) as Radians;
}
if (angle >= 2 * Math.PI) {
return (angle - 2 * Math.PI) as Radians;
}
return angle;
};
/**
* Return the polar coordinates for the given cartesian point represented by
* (x, y) for the center point 0,0 where the first number returned is the radius,
* the second is the angle in radians.
*/
export const cartesian2Polar = <P extends GlobalPoint | LocalPoint>([
x,
y,
]: P): PolarCoords => [Math.hypot(x, y), Math.atan2(y, x)];
export function degreesToRadians(degrees: Degrees): Radians {
return ((degrees * Math.PI) / 180) as Radians;
}
export function radiansToDegrees(degrees: Radians): Degrees {
return ((degrees * 180) / Math.PI) as Degrees;
}
/**
* Determines if the provided angle is a right angle.
*
* @param rads The angle to measure
* @returns TRUE if the provided angle is a right angle
*/
export function isRightAngleRads(rads: Radians): boolean {
return Math.abs(Math.sin(2 * rads)) < PRECISION;
}

41
packages/math/arc.test.ts Normal file
View File

@ -0,0 +1,41 @@
import { isPointOnSymmetricArc } from "./arc";
import { point } from "./point";
describe("point on arc", () => {
it("should detect point on simple arc", () => {
expect(
isPointOnSymmetricArc(
{
radius: 1,
startAngle: -Math.PI / 4,
endAngle: Math.PI / 4,
},
point(0.92291667, 0.385),
),
).toBe(true);
});
it("should not detect point outside of a simple arc", () => {
expect(
isPointOnSymmetricArc(
{
radius: 1,
startAngle: -Math.PI / 4,
endAngle: Math.PI / 4,
},
point(-0.92291667, 0.385),
),
).toBe(false);
});
it("should not detect point with good angle but incorrect radius", () => {
expect(
isPointOnSymmetricArc(
{
radius: 1,
startAngle: -Math.PI / 4,
endAngle: Math.PI / 4,
},
point(-0.5, 0.5),
),
).toBe(false);
});
});

20
packages/math/arc.ts Normal file
View File

@ -0,0 +1,20 @@
import { cartesian2Polar } from "./angle";
import type { GlobalPoint, LocalPoint, SymmetricArc } from "./types";
import { PRECISION } from "./utils";
/**
* Determines if a cartesian point lies on a symmetric arc, i.e. an arc which
* is part of a circle contour centered on 0, 0.
*/
export const isPointOnSymmetricArc = <P extends GlobalPoint | LocalPoint>(
{ radius: arcRadius, startAngle, endAngle }: SymmetricArc,
point: P,
): boolean => {
const [radius, angle] = cartesian2Polar(point);
return startAngle < endAngle
? Math.abs(radius - arcRadius) < PRECISION &&
startAngle <= angle &&
endAngle >= angle
: startAngle <= angle || endAngle >= angle;
};

223
packages/math/curve.ts Normal file
View File

@ -0,0 +1,223 @@
import { point, pointRotateRads } from "./point";
import type { Curve, GlobalPoint, LocalPoint, Radians } from "./types";
/**
*
* @param a
* @param b
* @param c
* @param d
* @returns
*/
export function curve<Point extends GlobalPoint | LocalPoint>(
a: Point,
b: Point,
c: Point,
d: Point,
) {
return [a, b, c, d] as Curve<Point>;
}
export const curveRotate = <Point extends LocalPoint | GlobalPoint>(
curve: Curve<Point>,
angle: Radians,
origin: Point,
) => {
return curve.map((p) => pointRotateRads(p, origin, angle));
};
/**
*
* @param pointsIn
* @param curveTightness
* @returns
*/
export function curveToBezier<Point extends LocalPoint | GlobalPoint>(
pointsIn: readonly Point[],
curveTightness = 0,
): Point[] {
const len = pointsIn.length;
if (len < 3) {
throw new Error("A curve must have at least three points.");
}
const out: Point[] = [];
if (len === 3) {
out.push(
point(pointsIn[0][0], pointsIn[0][1]), // Points need to be cloned
point(pointsIn[1][0], pointsIn[1][1]), // Points need to be cloned
point(pointsIn[2][0], pointsIn[2][1]), // Points need to be cloned
point(pointsIn[2][0], pointsIn[2][1]), // Points need to be cloned
);
} else {
const points: Point[] = [];
points.push(pointsIn[0], pointsIn[0]);
for (let i = 1; i < pointsIn.length; i++) {
points.push(pointsIn[i]);
if (i === pointsIn.length - 1) {
points.push(pointsIn[i]);
}
}
const b: Point[] = [];
const s = 1 - curveTightness;
out.push(point(points[0][0], points[0][1]));
for (let i = 1; i + 2 < points.length; i++) {
const cachedVertArray = points[i];
b[0] = point(cachedVertArray[0], cachedVertArray[1]);
b[1] = point(
cachedVertArray[0] + (s * points[i + 1][0] - s * points[i - 1][0]) / 6,
cachedVertArray[1] + (s * points[i + 1][1] - s * points[i - 1][1]) / 6,
);
b[2] = point(
points[i + 1][0] + (s * points[i][0] - s * points[i + 2][0]) / 6,
points[i + 1][1] + (s * points[i][1] - s * points[i + 2][1]) / 6,
);
b[3] = point(points[i + 1][0], points[i + 1][1]);
out.push(b[1], b[2], b[3]);
}
}
return out;
}
/**
*
* @param t
* @param controlPoints
* @returns
*/
export const cubicBezierPoint = <Point extends LocalPoint | GlobalPoint>(
t: number,
controlPoints: Curve<Point>,
): Point => {
const [p0, p1, p2, p3] = controlPoints;
const x =
Math.pow(1 - t, 3) * p0[0] +
3 * Math.pow(1 - t, 2) * t * p1[0] +
3 * (1 - t) * Math.pow(t, 2) * p2[0] +
Math.pow(t, 3) * p3[0];
const y =
Math.pow(1 - t, 3) * p0[1] +
3 * Math.pow(1 - t, 2) * t * p1[1] +
3 * (1 - t) * Math.pow(t, 2) * p2[1] +
Math.pow(t, 3) * p3[1];
return point(x, y);
};
/**
*
* @param point
* @param controlPoints
* @returns
*/
export const cubicBezierDistance = <Point extends LocalPoint | GlobalPoint>(
point: Point,
controlPoints: Curve<Point>,
) => {
// Calculate the closest point on the Bezier curve to the given point
const t = findClosestParameter(point, controlPoints);
// Calculate the coordinates of the closest point on the curve
const [closestX, closestY] = cubicBezierPoint(t, controlPoints);
// Calculate the distance between the given point and the closest point on the curve
const distance = Math.sqrt(
(point[0] - closestX) ** 2 + (point[1] - closestY) ** 2,
);
return distance;
};
const solveCubic = (a: number, b: number, c: number, d: number) => {
// This function solves the cubic equation ax^3 + bx^2 + cx + d = 0
const roots: number[] = [];
const discriminant =
18 * a * b * c * d -
4 * Math.pow(b, 3) * d +
Math.pow(b, 2) * Math.pow(c, 2) -
4 * a * Math.pow(c, 3) -
27 * Math.pow(a, 2) * Math.pow(d, 2);
if (discriminant >= 0) {
const C = Math.cbrt((discriminant + Math.sqrt(discriminant)) / 2);
const D = Math.cbrt((discriminant - Math.sqrt(discriminant)) / 2);
const root1 = (-b - C - D) / (3 * a);
const root2 = (-b + (C + D) / 2) / (3 * a);
const root3 = (-b + (C + D) / 2) / (3 * a);
roots.push(root1, root2, root3);
} else {
const realPart = -b / (3 * a);
const root1 =
2 * Math.sqrt(-b / (3 * a)) * Math.cos(Math.acos(realPart) / 3);
const root2 =
2 *
Math.sqrt(-b / (3 * a)) *
Math.cos((Math.acos(realPart) + 2 * Math.PI) / 3);
const root3 =
2 *
Math.sqrt(-b / (3 * a)) *
Math.cos((Math.acos(realPart) + 4 * Math.PI) / 3);
roots.push(root1, root2, root3);
}
return roots;
};
const findClosestParameter = <Point extends LocalPoint | GlobalPoint>(
point: Point,
controlPoints: Curve<Point>,
) => {
// This function finds the parameter t that minimizes the distance between the point
// and any point on the cubic Bezier curve.
const [p0, p1, p2, p3] = controlPoints;
// Use the direct formula to find the parameter t
const a = p3[0] - 3 * p2[0] + 3 * p1[0] - p0[0];
const b = 3 * p2[0] - 6 * p1[0] + 3 * p0[0];
const c = 3 * p1[0] - 3 * p0[0];
const d = p0[0] - point[0];
const rootsX = solveCubic(a, b, c, d);
// Do the same for the y-coordinate
const e = p3[1] - 3 * p2[1] + 3 * p1[1] - p0[1];
const f = 3 * p2[1] - 6 * p1[1] + 3 * p0[1];
const g = 3 * p1[1] - 3 * p0[1];
const h = p0[1] - point[1];
const rootsY = solveCubic(e, f, g, h);
// Select the real root that is between 0 and 1 (inclusive)
const validRootsX = rootsX.filter((root) => root >= 0 && root <= 1);
const validRootsY = rootsY.filter((root) => root >= 0 && root <= 1);
if (validRootsX.length === 0 || validRootsY.length === 0) {
// No valid roots found, use the midpoint as a fallback
return 0.5;
}
// Choose the parameter t that minimizes the distance
let minDistance = Infinity;
let closestT = 0;
for (const rootX of validRootsX) {
for (const rootY of validRootsY) {
const distance = Math.sqrt(
(rootX - point[0]) ** 2 + (rootY - point[1]) ** 2,
);
if (distance < minDistance) {
minDistance = distance;
closestT = (rootX + rootY) / 2; // Use the average for a smoother result
}
}
}
return closestT;
};

10
packages/excalidraw/tests/geometricAlgebra.test.ts → packages/math/ga/ga.test.ts
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@ -1,8 +1,8 @@
import * as GA from "../ga";
import { point, toString, direction, offset } from "../ga";
import * as GAPoint from "../gapoints";
import * as GALine from "../galines";
import * as GATransform from "../gatransforms";
import * as GA from "./ga";
import { point, toString, direction, offset } from "./ga";
import * as GAPoint from "./gapoints";
import * as GALine from "./galines";
import * as GATransform from "./gatransforms";
describe("geometric algebra", () => {
describe("points", () => {

0
packages/excalidraw/ga.ts → packages/math/ga/ga.ts
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0
packages/excalidraw/gadirections.ts → packages/math/ga/gadirections.ts
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0
packages/excalidraw/galines.ts → packages/math/ga/galines.ts
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0
packages/excalidraw/gapoints.ts → packages/math/ga/gapoints.ts
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0
packages/excalidraw/gatransforms.ts → packages/math/ga/gatransforms.ts
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12
packages/math/index.ts Normal file
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export * from "./arc";
export * from "./angle";
export * from "./curve";
export * from "./line";
export * from "./point";
export * from "./polygon";
export * from "./range";
export * from "./segment";
export * from "./triangle";
export * from "./types";
export * from "./vector";
export * from "./utils";

52
packages/math/line.ts Normal file
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import { pointCenter, pointRotateRads } from "./point";
import type { GlobalPoint, Line, LocalPoint, Radians } from "./types";
/**
* Create a line from two points.
*
* @param points The two points lying on the line
* @returns The line on which the points lie
*/
export function line<P extends GlobalPoint | LocalPoint>(a: P, b: P): Line<P> {
return [a, b] as Line<P>;
}
/**
* Convenient point creation from an array of two points.
*
* @param param0 The array with the two points to convert to a line
* @returns The created line
*/
export function lineFromPointPair<P extends GlobalPoint | LocalPoint>([a, b]: [
P,
P,
]): Line<P> {
return line(a, b);
}
/**
* TODO
*
* @param pointArray
* @returns
*/
export function lineFromPointArray<P extends GlobalPoint | LocalPoint>(
pointArray: P[],
): Line<P> | undefined {
return pointArray.length === 2
? line<P>(pointArray[0], pointArray[1])
: undefined;
}
// return the coordinates resulting from rotating the given line about an origin by an angle in degrees
// note that when the origin is not given, the midpoint of the given line is used as the origin
export const lineRotate = <Point extends LocalPoint | GlobalPoint>(
l: Line<Point>,
angle: Radians,
origin?: Point,
): Line<Point> => {
return line(
pointRotateRads(l[0], origin || pointCenter(l[0], l[1]), angle),
pointRotateRads(l[1], origin || pointCenter(l[0], l[1]), angle),
);
};

61
packages/math/package.json Normal file
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{
"name": "@excalidraw/math",
"version": "0.1.0",
"main": "./dist/prod/index.js",
"type": "module",
"module": "./dist/prod/index.js",
"exports": {
".": {
"development": "./dist/dev/index.js",
"default": "./dist/prod/index.js"
}
},
"types": "./dist/utils/index.d.ts",
"files": [
"dist/*"
],
"description": "Excalidraw math functions",
"publishConfig": {
"access": "public"
},
"license": "MIT",
"keywords": [
"excalidraw",
"excalidraw-math",
"math",
"vector",
"algebra",
"2d"
],
"browserslist": {
"production": [
">0.2%",
"not dead",
"not ie <= 11",
"not op_mini all",
"not safari < 12",
"not kaios <= 2.5",
"not edge < 79",
"not chrome < 70",
"not and_uc < 13",
"not samsung < 10"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
},
"bugs": "https://github.com/excalidraw/excalidraw/issues",
"repository": "https://github.com/excalidraw/excalidraw",
"dependencies": {
"@excalidraw/utils": "*"
},
"scripts": {
"gen:types": "rm -rf types && tsc",
"build:umd": "cross-env NODE_ENV=production webpack --config webpack.prod.config.js",
"build:esm": "rm -rf dist && node ../../scripts/buildUtils.js && yarn gen:types",
"build:umd:withAnalyzer": "cross-env NODE_ENV=production ANALYZER=true webpack --config webpack.prod.config.js",
"pack": "yarn build:umd && yarn pack"
}
}

24
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import { point, pointRotateRads } from "./point";
import type { Radians } from "./types";
describe("rotate", () => {
it("should rotate over (x2, y2) and return the rotated coordinates for (x1, y1)", () => {
const x1 = 10;
const y1 = 20;
const x2 = 20;
const y2 = 30;
const angle = (Math.PI / 2) as Radians;
const [rotatedX, rotatedY] = pointRotateRads(
point(x1, y1),
point(x2, y2),
angle,
);
expect([rotatedX, rotatedY]).toEqual([30, 20]);
const res2 = pointRotateRads(
point(rotatedX, rotatedY),
point(x2, y2),
-angle as Radians,
);
expect(res2).toEqual([x1, x2]);
});
});

257
packages/math/point.ts Normal file
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import { degreesToRadians } from "./angle";
import type {
LocalPoint,
GlobalPoint,
Radians,
Degrees,
Vector,
} from "./types";
import { PRECISION } from "./utils";
import { vectorFromPoint, vectorScale } from "./vector";
/**
* Create a properly typed Point instance from the X and Y coordinates.
*
* @param x The X coordinate
* @param y The Y coordinate
* @returns The branded and created point
*/
export function point<Point extends GlobalPoint | LocalPoint>(
x: number,
y: number,
): Point {
return [x, y] as Point;
}
/**
* Converts and remaps an array containing a pair of numbers to Point.
*
* @param numberArray The number array to check and to convert to Point
* @returns The point instance
*/
export function pointFromArray<Point extends GlobalPoint | LocalPoint>(
numberArray: number[],
): Point | undefined {
return numberArray.length === 2
? point<Point>(numberArray[0], numberArray[1])
: undefined;
}
/**
* Converts and remaps a pair of numbers to Point.
*
* @param pair A number pair to convert to Point
* @returns The point instance
*/
export function pointFromPair<Point extends GlobalPoint | LocalPoint>(
pair: [number, number],
): Point {
return pair as Point;
}
/**
* Convert a vector to a point.
*
* @param v The vector to convert
* @returns The point the vector points at with origin 0,0
*/
export function pointFromVector<P extends GlobalPoint | LocalPoint>(
v: Vector,
): P {
return v as unknown as P;
}
/**
* Checks if the provided value has the shape of a Point.
*
* @param p The value to attempt verification on
* @returns TRUE if the provided value has the shape of a local or global point
*/
export function isPoint(p: unknown): p is LocalPoint | GlobalPoint {
return (
Array.isArray(p) &&
p.length === 2 &&
typeof p[0] === "number" &&
!isNaN(p[0]) &&
typeof p[1] === "number" &&
!isNaN(p[1])
);
}
/**
* Compare two points coordinate-by-coordinate and if
* they are closer than INVERSE_PRECISION it returns TRUE.
*
* @param a Point The first point to compare
* @param b Point The second point to compare
* @returns TRUE if the points are sufficiently close to each other
*/
export function pointsEqual<Point extends GlobalPoint | LocalPoint>(
a: Point,
b: Point,
): boolean {
const abs = Math.abs;
return abs(a[0] - b[0]) < PRECISION && abs(a[1] - b[1]) < PRECISION;
}
/**
* Roate a point by [angle] radians.
*
* @param point The point to rotate
* @param center The point to rotate around, the center point
* @param angle The radians to rotate the point by
* @returns The rotated point
*/
export function pointRotateRads<Point extends GlobalPoint | LocalPoint>(
[x, y]: Point,
[cx, cy]: Point,
angle: Radians,
): Point {
return point(
(x - cx) * Math.cos(angle) - (y - cy) * Math.sin(angle) + cx,
(x - cx) * Math.sin(angle) + (y - cy) * Math.cos(angle) + cy,
);
}
/**
* Roate a point by [angle] degree.
*
* @param point The point to rotate
* @param center The point to rotate around, the center point
* @param angle The degree to rotate the point by
* @returns The rotated point
*/
export function pointRotateDegs<Point extends GlobalPoint | LocalPoint>(
point: Point,
center: Point,
angle: Degrees,
): Point {
return pointRotateRads(point, center, degreesToRadians(angle));
}
/**
* Translate a point by a vector.
*
* WARNING: This is not for translating Excalidraw element points!
* You need to account for rotation on base coordinates
* on your own.
* CONSIDER USING AN APPROPRIATE ELEMENT-AWARE TRANSLATE!
*
* @param p The point to apply the translation on
* @param v The vector to translate by
* @returns
*/
// TODO 99% of use is translating between global and local coords, which need to be formalized
export function pointTranslate<
From extends GlobalPoint | LocalPoint,
To extends GlobalPoint | LocalPoint,
>(p: From, v: Vector = [0, 0] as Vector): To {
return point(p[0] + v[0], p[1] + v[1]);
}
/**
* Find the center point at equal distance from both points.
*
* @param a One of the points to create the middle point for
* @param b The other point to create the middle point for
* @returns The middle point
*/
export function pointCenter<P extends LocalPoint | GlobalPoint>(a: P, b: P): P {
return point((a[0] + b[0]) / 2, (a[1] + b[1]) / 2);
}
/**
* Add together two points by their coordinates like you'd apply a translation
* to a point by a vector.
*
* @param a One point to act as a basis
* @param b The other point to act like the vector to translate by
* @returns
*/
export function pointAdd<Point extends LocalPoint | GlobalPoint>(
a: Point,
b: Point,
): Point {
return point(a[0] + b[0], a[1] + b[1]);
}
/**
* Subtract a point from another point like you'd translate a point by an
* invese vector.
*
* @param a The point to translate
* @param b The point which will act like a vector
* @returns The resulting point
*/
export function pointSubtract<Point extends LocalPoint | GlobalPoint>(
a: Point,
b: Point,
): Point {
return point(a[0] - b[0], a[1] - b[1]);
}
/**
* Calculate the distance between two points.
*
* @param a First point
* @param b Second point
* @returns The euclidean distance between the two points.
*/
export function pointDistance<P extends LocalPoint | GlobalPoint>(
a: P,
b: P,
): number {
return Math.hypot(b[0] - a[0], b[1] - a[1]);
}
/**
* Calculate the squared distance between two points.
*
* Note: Use this if you only compare distances, it saves a square root.
*
* @param a First point
* @param b Second point
* @returns The euclidean distance between the two points.
*/
export function pointDistanceSq<P extends LocalPoint | GlobalPoint>(
a: P,
b: P,
): number {
return Math.hypot(b[0] - a[0], b[1] - a[1]);
}
/**
* Scale a point from a given origin by the multiplier.
*
* @param p The point to scale
* @param mid The origin to scale from
* @param multiplier The scaling factor
* @returns
*/
export const pointScaleFromOrigin = <P extends GlobalPoint | LocalPoint>(
p: P,
mid: P,
multiplier: number,
) => pointTranslate(mid, vectorScale(vectorFromPoint(p, mid), multiplier));
/**
* Returns whether `q` lies inside the segment/rectangle defined by `p` and `r`.
* This is an approximation to "does `q` lie on a segment `pr`" check.
*
* @param p The first point to compare against
* @param q The actual point this function checks whether is in between
* @param r The other point to compare against
* @returns TRUE if q is indeed between p and r
*/
export const isPointWithinBounds = <P extends GlobalPoint | LocalPoint>(
p: P,
q: P,
r: P,
) => {
return (
q[0] <= Math.max(p[0], r[0]) &&
q[0] >= Math.min(p[0], r[0]) &&
q[1] <= Math.max(p[1], r[1]) &&
q[1] >= Math.min(p[1], r[1])
);
};

72
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import { pointsEqual } from "./point";
import { lineSegment, pointOnLineSegment } from "./segment";
import type { GlobalPoint, LocalPoint, Polygon } from "./types";
import { PRECISION } from "./utils";
export function polygon<Point extends GlobalPoint | LocalPoint>(
...points: Point[]
) {
return polygonClose(points) as Polygon<Point>;
}
export function polygonFromPoints<Point extends GlobalPoint | LocalPoint>(
points: Point[],
) {
return polygonClose(points) as Polygon<Point>;
}
export const polygonIncludesPoint = <Point extends LocalPoint | GlobalPoint>(
point: Point,
polygon: Polygon<Point>,
) => {
const x = point[0];
const y = point[1];
let inside = false;
for (let i = 0, j = polygon.length - 1; i < polygon.length; j = i++) {
const xi = polygon[i][0];
const yi = polygon[i][1];
const xj = polygon[j][0];
const yj = polygon[j][1];
if (
((yi > y && yj <= y) || (yi <= y && yj > y)) &&
x < ((xj - xi) * (y - yi)) / (yj - yi) + xi
) {
inside = !inside;
}
}
return inside;
};
export const pointOnPolygon = <Point extends LocalPoint | GlobalPoint>(
p: Point,
poly: Polygon<Point>,
threshold = PRECISION,
) => {
let on = false;
for (let i = 0, l = poly.length - 1; i < l; i++) {
if (pointOnLineSegment(p, lineSegment(poly[i], poly[i + 1]), threshold)) {
on = true;
break;
}
}
return on;
};
function polygonClose<Point extends LocalPoint | GlobalPoint>(
polygon: Point[],
) {
return polygonIsClosed(polygon)
? polygon
: ([...polygon, polygon[0]] as Polygon<Point>);
}
function polygonIsClosed<Point extends LocalPoint | GlobalPoint>(
polygon: Point[],
) {
return pointsEqual(polygon[0], polygon[polygon.length - 1]);
}

51
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import { rangeInclusive, rangeIntersection, rangesOverlap } from "./range";
describe("range overlap", () => {
const range1_4 = rangeInclusive(1, 4);
it("should overlap when range a contains range b", () => {
expect(rangesOverlap(range1_4, rangeInclusive(2, 3))).toBe(true);
expect(rangesOverlap(range1_4, range1_4)).toBe(true);
expect(rangesOverlap(range1_4, rangeInclusive(1, 3))).toBe(true);
expect(rangesOverlap(range1_4, rangeInclusive(2, 4))).toBe(true);
});
it("should overlap when range b contains range a", () => {
expect(rangesOverlap(rangeInclusive(2, 3), range1_4)).toBe(true);
expect(rangesOverlap(rangeInclusive(1, 3), range1_4)).toBe(true);
expect(rangesOverlap(rangeInclusive(2, 4), range1_4)).toBe(true);
});
it("should overlap when range a and b intersect", () => {
expect(rangesOverlap(range1_4, rangeInclusive(2, 5))).toBe(true);
});
});
describe("range intersection", () => {
const range1_4 = rangeInclusive(1, 4);
it("should intersect completely with itself", () => {
expect(rangeIntersection(range1_4, range1_4)).toEqual(range1_4);
});
it("should intersect irrespective of order", () => {
expect(rangeIntersection(range1_4, rangeInclusive(2, 3))).toEqual([2, 3]);
expect(rangeIntersection(rangeInclusive(2, 3), range1_4)).toEqual([2, 3]);
expect(rangeIntersection(range1_4, rangeInclusive(3, 5))).toEqual(
rangeInclusive(3, 4),
);
expect(rangeIntersection(rangeInclusive(3, 5), range1_4)).toEqual(
rangeInclusive(3, 4),
);
});
it("should intersect at the edge", () => {
expect(rangeIntersection(range1_4, rangeInclusive(4, 5))).toEqual(
rangeInclusive(4, 4),
);
});
it("should not intersect", () => {
expect(rangeIntersection(range1_4, rangeInclusive(5, 7))).toEqual(null);
});
});

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import { toBrandedType } from "../excalidraw/utils";
import type { InclusiveRange } from "./types";
/**
* Create an inclusive range from the two numbers provided.
*
* @param start Start of the range
* @param end End of the range
* @returns
*/
export function rangeInclusive(start: number, end: number): InclusiveRange {
return toBrandedType<InclusiveRange>([start, end]);
}
/**
* Turn a number pair into an inclusive range.
*
* @param pair The number pair to convert to an inclusive range
* @returns The new inclusive range
*/
export function rangeInclusiveFromPair(pair: [start: number, end: number]) {
return toBrandedType<InclusiveRange>(pair);
}
/**
* Given two ranges, return if the two ranges overlap with each other e.g.
* [1, 3] overlaps with [2, 4] while [1, 3] does not overlap with [4, 5].
*
* @param param0 One of the ranges to compare
* @param param1 The other range to compare against
* @returns TRUE if the ranges overlap
*/
export const rangesOverlap = (
[a0, a1]: InclusiveRange,
[b0, b1]: InclusiveRange,
): boolean => {
if (a0 <= b0) {
return a1 >= b0;
}
if (a0 >= b0) {
return b1 >= a0;
}
return false;
};
/**
* Given two ranges,return ther intersection of the two ranges if any e.g. the
* intersection of [1, 3] and [2, 4] is [2, 3].
*
* @param param0 The first range to compare
* @param param1 The second range to compare
* @returns The inclusive range intersection or NULL if no intersection
*/
export const rangeIntersection = (
[a0, a1]: InclusiveRange,
[b0, b1]: InclusiveRange,
): InclusiveRange | null => {
const rangeStart = Math.max(a0, b0);
const rangeEnd = Math.min(a1, b1);
if (rangeStart <= rangeEnd) {
return toBrandedType<InclusiveRange>([rangeStart, rangeEnd]);
}
return null;
};
/**
* Determine if a value is inside a range.
*
* @param value The value to check
* @param range The range
* @returns
*/
export const rangeIncludesValue = (
value: number,
[min, max]: InclusiveRange,
): boolean => {
return value >= min && value <= max;
};

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import {
isPoint,
pointCenter,
pointFromVector,
pointRotateRads,
} from "./point";
import type { GlobalPoint, LineSegment, LocalPoint, Radians } from "./types";
import { PRECISION } from "./utils";
import {
vectorAdd,
vectorCross,
vectorFromPoint,
vectorScale,
vectorSubtract,
} from "./vector";
/**
* Create a line segment from two points.
*
* @param points The two points delimiting the line segment on each end
* @returns The line segment delineated by the points
*/
export function lineSegment<P extends GlobalPoint | LocalPoint>(
a: P,
b: P,
): LineSegment<P> {
return [a, b] as LineSegment<P>;
}
export function lineSegmentFromPointArray<P extends GlobalPoint | LocalPoint>(
pointArray: P[],
): LineSegment<P> | undefined {
return pointArray.length === 2
? lineSegment<P>(pointArray[0], pointArray[1])
: undefined;
}
/**
*
* @param segment
* @returns
*/
export const isLineSegment = <Point extends GlobalPoint | LocalPoint>(
segment: unknown,
): segment is LineSegment<Point> =>
Array.isArray(segment) &&
segment.length === 2 &&
isPoint(segment[0]) &&
isPoint(segment[0]);
/**
* Return the coordinates resulting from rotating the given line about an origin by an angle in radians
* note that when the origin is not given, the midpoint of the given line is used as the origin.
*
* @param l
* @param angle
* @param origin
* @returns
*/
export const lineSegmentRotate = <Point extends LocalPoint | GlobalPoint>(
l: LineSegment<Point>,
angle: Radians,
origin?: Point,
): LineSegment<Point> => {
return lineSegment(
pointRotateRads(l[0], origin || pointCenter(l[0], l[1]), angle),
pointRotateRads(l[1], origin || pointCenter(l[0], l[1]), angle),
);
};
/**
* Calculates the point two line segments with a definite start and end point
* intersect at.
*/
export const segmentsIntersectAt = <Point extends GlobalPoint | LocalPoint>(
a: Readonly<LineSegment<Point>>,
b: Readonly<LineSegment<Point>>,
): Point | null => {
const a0 = vectorFromPoint(a[0]);
const a1 = vectorFromPoint(a[1]);
const b0 = vectorFromPoint(b[0]);
const b1 = vectorFromPoint(b[1]);
const r = vectorSubtract(a1, a0);
const s = vectorSubtract(b1, b0);
const denominator = vectorCross(r, s);
if (denominator === 0) {
return null;
}
const i = vectorSubtract(vectorFromPoint(b[0]), vectorFromPoint(a[0]));
const u = vectorCross(i, r) / denominator;
const t = vectorCross(i, s) / denominator;
if (u === 0) {
return null;
}
const p = vectorAdd(a0, vectorScale(r, t));
if (t >= 0 && t < 1 && u >= 0 && u < 1) {
return pointFromVector<Point>(p);
}
return null;
};
export const pointOnLineSegment = <Point extends LocalPoint | GlobalPoint>(
point: Point,
line: LineSegment<Point>,
threshold = PRECISION,
) => {
const distance = distanceToLineSegment(point, line);
if (distance === 0) {
return true;
}
return distance < threshold;
};
export const distanceToLineSegment = <Point extends LocalPoint | GlobalPoint>(
point: Point,
line: LineSegment<Point>,
) => {
const [x, y] = point;
const [[x1, y1], [x2, y2]] = line;
const A = x - x1;
const B = y - y1;
const C = x2 - x1;
const D = y2 - y1;
const dot = A * C + B * D;
const len_sq = C * C + D * D;
let param = -1;
if (len_sq !== 0) {
param = dot / len_sq;
}
let xx;
let yy;
if (param < 0) {
xx = x1;
yy = y1;
} else if (param > 1) {
xx = x2;
yy = y2;
} else {
xx = x1 + param * C;
yy = y1 + param * D;
}
const dx = x - xx;
const dy = y - yy;
return Math.sqrt(dx * dx + dy * dy);
};

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import type { GlobalPoint, LocalPoint, Triangle } from "./types";
// Types
/**
* Tests if a point lies inside a triangle. This function
* will return FALSE if the point lies exactly on the sides
* of the triangle.
*
* @param triangle The triangle to test the point for
* @param p The point to test whether is in the triangle
* @returns TRUE if the point is inside of the triangle
*/
export function triangleIncludesPoint<P extends GlobalPoint | LocalPoint>(
[a, b, c]: Triangle<P>,
p: P,
): boolean {
const triangleSign = (p1: P, p2: P, p3: P) =>
(p1[0] - p3[0]) * (p2[1] - p3[1]) - (p2[0] - p3[0]) * (p1[1] - p3[1]);
const d1 = triangleSign(p, a, b);
const d2 = triangleSign(p, b, c);
const d3 = triangleSign(p, c, a);
const has_neg = d1 < 0 || d2 < 0 || d3 < 0;
const has_pos = d1 > 0 || d2 > 0 || d3 > 0;
return !(has_neg && has_pos);
}

130
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//
// Measurements
//
/**
* By definition one radian is the angle subtended at the centre
* of a circle by an arc that is equal in length to the radius.
*/
export type Radians = number & { _brand: "excalimath__radian" };
/**
* An angle measurement of a plane angle in which one full
* rotation is 360 degrees.
*/
export type Degrees = number & { _brand: "excalimath_degree" };
//
// Range
//
/**
* A number range which includes the start and end numbers in the range.
*/
export type InclusiveRange = [number, number] & { _brand: "excalimath_degree" };
//
// Point
//
/**
* Represents a 2D position in world or canvas space. A
* global coordinate.
*/
export type GlobalPoint = [x: number, y: number] & {
_brand: "excalimath__globalpoint";
};
/**
* Represents a 2D position in whatever local space it's
* needed. A local coordinate.
*/
export type LocalPoint = [x: number, y: number] & {
_brand: "excalimath__localpoint";
};
// Line
/**
* A line is an infinitely long object with no width, depth, or curvature.
*/
export type Line<P extends GlobalPoint | LocalPoint> = [p: P, q: P] & {
_brand: "excalimath_line";
};
/**
* In geometry, a line segment is a part of a straight
* line that is bounded by two distinct end points, and
* contains every point on the line that is between its endpoints.
*/
export type LineSegment<P extends GlobalPoint | LocalPoint> = [a: P, b: P] & {
_brand: "excalimath_linesegment";
};
//
// Vector
//
/**
* Represents a 2D vector
*/
export type Vector = [u: number, v: number] & {
_brand: "excalimath__vector";
};
// Triangles
/**
* A triangle represented by 3 points
*/
export type Triangle<P extends GlobalPoint | LocalPoint> = [
a: P,
b: P,
c: P,
] & {
_brand: "excalimath__triangle";
};
//
// Polygon
//
/**
* A polygon is a closed shape by connecting the given points
* rectangles and diamonds are modelled by polygons
*/
export type Polygon<Point extends GlobalPoint | LocalPoint> = Point[] & {
_brand: "excalimath_polygon";
};
//
// Curve
//
/**
* Cubic bezier curve with four control points
*/
export type Curve<Point extends GlobalPoint | LocalPoint> = [
Point,
Point,
Point,
Point,
] & {
_brand: "excalimath_curve";
};
export type PolarCoords = [
radius: number,
/** angle in radians */
angle: number,
];
/**
* Angles are in radians and centered on 0, 0. Zero radians on a 1 radius circle
* corresponds to (1, 0) cartesian coordinates (point), i.e. to the "right".
*/
export type SymmetricArc = {
radius: number;
startAngle: number;
endAngle: number;
};

17
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@ -0,0 +1,17 @@
export const PRECISION = 10e-5;
export function clamp(value: number, min: number, max: number) {
return Math.min(Math.max(value, min), max);
}
export function round(value: number, precision: number) {
const multiplier = Math.pow(10, precision);
return Math.round((value + Number.EPSILON) * multiplier) / multiplier;
}
export const average = (a: number, b: number) => (a + b) / 2;
export const isFiniteNumber = (value: any): value is number => {
return typeof value === "number" && Number.isFinite(value);
};

12
packages/math/vector.test.ts Normal file
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@ -0,0 +1,12 @@
import { isVector } from ".";
describe("Vector", () => {
test("isVector", () => {
expect(isVector([5, 5])).toBe(true);
expect(isVector([-5, -5])).toBe(true);
expect(isVector([5, 0.5])).toBe(true);
expect(isVector(null)).toBe(false);
expect(isVector(undefined)).toBe(false);
expect(isVector([5, NaN])).toBe(false);
});
});

141
packages/math/vector.ts Normal file
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@ -0,0 +1,141 @@
import type { GlobalPoint, LocalPoint, Vector } from "./types";
/**
* Create a vector from the x and y coordiante elements.
*
* @param x The X aspect of the vector
* @param y T Y aspect of the vector
* @returns The constructed vector with X and Y as the coordinates
*/
export function vector(
x: number,
y: number,
originX: number = 0,
originY: number = 0,
): Vector {
return [x - originX, y - originY] as Vector;
}
/**
* Turn a point into a vector with the origin point.
*
* @param p The point to turn into a vector
* @param origin The origin point in a given coordiante system
* @returns The created vector from the point and the origin
*/
export function vectorFromPoint<Point extends GlobalPoint | LocalPoint>(
p: Point,
origin: Point = [0, 0] as Point,
): Vector {
return vector(p[0] - origin[0], p[1] - origin[1]);
}
/**
* Cross product is a binary operation on two vectors in 2D space.
* It results in a vector that is perpendicular to both vectors.
*
* @param a One of the vectors to use for the directed area calculation
* @param b The other vector to use for the directed area calculation
* @returns The directed area value for the two vectos
*/
export function vectorCross(a: Vector, b: Vector): number {
return a[0] * b[1] - b[0] * a[1];
}
/**
* Dot product is defined as the sum of the products of the
* two vectors.
*
* @param a One of the vectors for which the sum of products is calculated
* @param b The other vector for which the sum of products is calculated
* @returns The sum of products of the two vectors
*/
export function vectorDot(a: Vector, b: Vector) {
return a[0] * b[0] + a[1] * b[1];
}
/**
* Determines if the value has the shape of a Vector.
*
* @param v The value to test
* @returns TRUE if the value has the shape and components of a Vectors
*/
export function isVector(v: unknown): v is Vector {
return (
Array.isArray(v) &&
v.length === 2 &&
typeof v[0] === "number" &&
!isNaN(v[0]) &&
typeof v[1] === "number" &&
!isNaN(v[1])
);
}
/**
* Add two vectors by adding their coordinates.
*
* @param a One of the vectors to add
* @param b The other vector to add
* @returns The sum vector of the two provided vectors
*/
export function vectorAdd(a: Readonly<Vector>, b: Readonly<Vector>): Vector {
return [a[0] + b[0], a[1] + b[1]] as Vector;
}
/**
* Add two vectors by adding their coordinates.
*
* @param start One of the vectors to add
* @param end The other vector to add
* @returns The sum vector of the two provided vectors
*/
export function vectorSubtract(
start: Readonly<Vector>,
end: Readonly<Vector>,
): Vector {
return [start[0] - end[0], start[1] - end[1]] as Vector;
}
/**
* Scale vector by a scalar.
*
* @param v The vector to scale
* @param scalar The scalar to multiply the vector components with
* @returns The new scaled vector
*/
export function vectorScale(v: Vector, scalar: number): Vector {
return vector(v[0] * scalar, v[1] * scalar);
}
/**
* Calculates the sqare magnitude of a vector. Use this if you compare
* magnitudes as it saves you an SQRT.
*
* @param v The vector to measure
* @returns The scalar squared magnitude of the vector
*/
export function vectorMagnitudeSq(v: Vector) {
return v[0] * v[0] + v[1] * v[1];
}
/**
* Calculates the magnitude of a vector.
*
* @param v The vector to measure
* @returns The scalar magnitude of the vector
*/
export function vectorMagnitude(v: Vector) {
return Math.sqrt(vectorMagnitudeSq(v));
}
/**
* Normalize the vector (i.e. make the vector magnitue equal 1).
*
* @param v The vector to normalize
* @returns The new normalized vector
*/
export const vectorNormalize = (v: Vector): Vector => {
const m = vectorMagnitude(v);
return vector(v[0] / m, v[1] / m);
};

55
packages/math/webpack.prod.config.js Normal file
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@ -0,0 +1,55 @@
const webpack = require("webpack");
const path = require("path");
const BundleAnalyzerPlugin =
require("webpack-bundle-analyzer").BundleAnalyzerPlugin;
module.exports = {
mode: "production",
entry: { "excalidraw-math.min": "./index.js" },
output: {
path: path.resolve(__dirname, "dist"),
filename: "[name].js",
library: "ExcalidrawMath",
libraryTarget: "umd",
},
resolve: {
extensions: [".tsx", ".ts", ".js", ".css", ".scss"],
},
optimization: {
runtimeChunk: false,
},
module: {
rules: [
{
test: /\.(ts|tsx|js)$/,
use: [
{
loader: "ts-loader",
options: {
transpileOnly: true,
configFile: path.resolve(__dirname, "../tsconfig.prod.json"),
},
},
{
loader: "babel-loader",
options: {
presets: [
"@babel/preset-env",
["@babel/preset-react", { runtime: "automatic" }],
"@babel/preset-typescript",
],
plugins: [["@babel/plugin-transform-runtime"]],
},
},
],
},
],
},
plugins: [
new webpack.optimize.LimitChunkCountPlugin({
maxChunks: 1,
}),
...(process.env.ANALYZER === "true" ? [new BundleAnalyzerPlugin()] : []),
],
};

55
packages/utils/bbox.ts
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@ -1,9 +1,16 @@
import {
vectorCross,
vectorFromPoint,
type GlobalPoint,
type LocalPoint,
} from "../math";
import type { Bounds } from "../excalidraw/element/bounds";
import type { Point } from "../excalidraw/types";
export type LineSegment = [Point, Point];
export type LineSegment<P extends LocalPoint | GlobalPoint> = [P, P];
export function getBBox(line: LineSegment): Bounds {
export function getBBox<P extends LocalPoint | GlobalPoint>(
line: LineSegment<P>,
): Bounds {
return [
Math.min(line[0][0], line[1][0]),
Math.min(line[0][1], line[1][1]),
@ -12,40 +19,37 @@ export function getBBox(line: LineSegment): Bounds {
];
}
export function crossProduct(a: Point, b: Point) {
return a[0] * b[1] - b[0] * a[1];
}
export function doBBoxesIntersect(a: Bounds, b: Bounds) {
return a[0] <= b[2] && a[2] >= b[0] && a[1] <= b[3] && a[3] >= b[1];
}
export function translate(a: Point, b: Point): Point {
return [a[0] - b[0], a[1] - b[1]];
}
const EPSILON = 0.000001;
export function isPointOnLine(l: LineSegment, p: Point) {
const p1 = translate(l[1], l[0]);
const p2 = translate(p, l[0]);
export function isPointOnLine<P extends GlobalPoint | LocalPoint>(
l: LineSegment<P>,
p: P,
) {
const p1 = vectorFromPoint(l[1], l[0]);
const p2 = vectorFromPoint(p, l[0]);
const r = crossProduct(p1, p2);
const r = vectorCross(p1, p2);
return Math.abs(r) < EPSILON;
}
export function isPointRightOfLine(l: LineSegment, p: Point) {
const p1 = translate(l[1], l[0]);
const p2 = translate(p, l[0]);
export function isPointRightOfLine<P extends GlobalPoint | LocalPoint>(
l: LineSegment<P>,
p: P,
) {
const p1 = vectorFromPoint(l[1], l[0]);
const p2 = vectorFromPoint(p, l[0]);
return crossProduct(p1, p2) < 0;
return vectorCross(p1, p2) < 0;
}
export function isLineSegmentTouchingOrCrossingLine(
a: LineSegment,
b: LineSegment,
) {
export function isLineSegmentTouchingOrCrossingLine<
P extends GlobalPoint | LocalPoint,
>(a: LineSegment<P>, b: LineSegment<P>) {
return (
isPointOnLine(a, b[0]) ||
isPointOnLine(a, b[1]) ||
@ -56,7 +60,10 @@ export function isLineSegmentTouchingOrCrossingLine(
}
// https://martin-thoma.com/how-to-check-if-two-line-segments-intersect/
export function doLineSegmentsIntersect(a: LineSegment, b: LineSegment) {
export function doLineSegmentsIntersect<P extends GlobalPoint | LocalPoint>(
a: LineSegment<P>,
b: LineSegment<P>,
) {
return (
doBBoxesIntersect(getBBox(a), getBBox(b)) &&
isLineSegmentTouchingOrCrossingLine(a, b) &&

87
packages/utils/collision.test.ts Normal file
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import type { Curve, Degrees, GlobalPoint } from "../math";
import {
curve,
degreesToRadians,
lineSegment,
lineSegmentRotate,
point,
pointRotateDegs,
} from "../math";
import { pointOnCurve, pointOnPolyline } from "./collision";
import type { Polyline } from "./geometry/shape";
describe("point and curve", () => {
const c: Curve<GlobalPoint> = curve(
point(1.4, 1.65),
point(1.9, 7.9),
point(5.9, 1.65),
point(6.44, 4.84),
);
it("point on curve", () => {
expect(pointOnCurve(c[0], c, 10e-5)).toBe(true);
expect(pointOnCurve(c[3], c, 10e-5)).toBe(true);
expect(pointOnCurve(point(2, 4), c, 0.1)).toBe(true);
expect(pointOnCurve(point(4, 4.4), c, 0.1)).toBe(true);
expect(pointOnCurve(point(5.6, 3.85), c, 0.1)).toBe(true);
expect(pointOnCurve(point(5.6, 4), c, 0.1)).toBe(false);
expect(pointOnCurve(c[1], c, 0.1)).toBe(false);
expect(pointOnCurve(c[2], c, 0.1)).toBe(false);
});
});
describe("point and polylines", () => {
const polyline: Polyline<GlobalPoint> = [
lineSegment(point(1, 0), point(1, 2)),
lineSegment(point(1, 2), point(2, 2)),
lineSegment(point(2, 2), point(2, 1)),
lineSegment(point(2, 1), point(3, 1)),
];
it("point on the line", () => {
expect(pointOnPolyline(point(1, 0), polyline)).toBe(true);
expect(pointOnPolyline(point(1, 2), polyline)).toBe(true);
expect(pointOnPolyline(point(2, 2), polyline)).toBe(true);
expect(pointOnPolyline(point(2, 1), polyline)).toBe(true);
expect(pointOnPolyline(point(3, 1), polyline)).toBe(true);
expect(pointOnPolyline(point(1, 1), polyline)).toBe(true);
expect(pointOnPolyline(point(2, 1.5), polyline)).toBe(true);
expect(pointOnPolyline(point(2.5, 1), polyline)).toBe(true);
expect(pointOnPolyline(point(0, 1), polyline)).toBe(false);
expect(pointOnPolyline(point(2.1, 1.5), polyline)).toBe(false);
});
it("point on the line with rotation", () => {
const truePoints = [
point(1, 0),
point(1, 2),
point(2, 2),
point(2, 1),
point(3, 1),
];
truePoints.forEach((p) => {
const rotation = (Math.random() * 360) as Degrees;
const rotatedPoint = pointRotateDegs(p, point(0, 0), rotation);
const rotatedPolyline = polyline.map((line) =>
lineSegmentRotate(line, degreesToRadians(rotation), point(0, 0)),
);
expect(pointOnPolyline(rotatedPoint, rotatedPolyline)).toBe(true);
});
const falsePoints = [point(0, 1), point(2.1, 1.5)];
falsePoints.forEach((p) => {
const rotation = (Math.random() * 360) as Degrees;
const rotatedPoint = pointRotateDegs(p, point(0, 0), rotation);
const rotatedPolyline = polyline.map((line) =>
lineSegmentRotate(line, degreesToRadians(rotation), point(0, 0)),
);
expect(pointOnPolyline(rotatedPoint, rotatedPolyline)).toBe(false);
});
});
});

104
packages/utils/collision.ts
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@ -1,20 +1,26 @@
import type { Point, Polygon, GeometricShape } from "./geometry/shape";
import type { Polycurve, Polyline } from "./geometry/shape";
import {
pointInEllipse,
pointInPolygon,
pointOnCurve,
pointOnEllipse,
pointOnLine,
pointOnPolycurve,
type GeometricShape,
} from "./geometry/shape";
import type { Curve } from "../math";
import {
lineSegment,
point,
polygonIncludesPoint,
pointOnLineSegment,
pointOnPolygon,
pointOnPolyline,
close,
} from "./geometry/geometry";
polygonFromPoints,
type GlobalPoint,
type LocalPoint,
type Polygon,
} from "../math";
// check if the given point is considered on the given shape's border
export const isPointOnShape = (
export const isPointOnShape = <Point extends GlobalPoint | LocalPoint>(
point: Point,
shape: GeometricShape,
shape: GeometricShape<Point>,
tolerance = 0,
) => {
// get the distance from the given point to the given element
@ -25,7 +31,7 @@ export const isPointOnShape = (
case "ellipse":
return pointOnEllipse(point, shape.data, tolerance);
case "line":
return pointOnLine(point, shape.data, tolerance);
return pointOnLineSegment(point, shape.data, tolerance);
case "polyline":
return pointOnPolyline(point, shape.data, tolerance);
case "curve":
@ -38,10 +44,13 @@ export const isPointOnShape = (
};
// check if the given point is considered inside the element's border
export const isPointInShape = (point: Point, shape: GeometricShape) => {
export const isPointInShape = <Point extends GlobalPoint | LocalPoint>(
point: Point,
shape: GeometricShape<Point>,
) => {
switch (shape.type) {
case "polygon":
return pointInPolygon(point, shape.data);
return polygonIncludesPoint(point, shape.data);
case "line":
return false;
case "curve":
@ -49,8 +58,8 @@ export const isPointInShape = (point: Point, shape: GeometricShape) => {
case "ellipse":
return pointInEllipse(point, shape.data);
case "polyline": {
const polygon = close(shape.data.flat()) as Polygon;
return pointInPolygon(point, polygon);
const polygon = polygonFromPoints(shape.data.flat());
return polygonIncludesPoint(point, polygon);
}
case "polycurve": {
return false;
@ -61,6 +70,67 @@ export const isPointInShape = (point: Point, shape: GeometricShape) => {
};
// check if the given element is in the given bounds
export const isPointInBounds = (point: Point, bounds: Polygon) => {
return pointInPolygon(point, bounds);
export const isPointInBounds = <Point extends GlobalPoint | LocalPoint>(
point: Point,
bounds: Polygon<Point>,
) => {
return polygonIncludesPoint(point, bounds);
};
const pointOnPolycurve = <Point extends LocalPoint | GlobalPoint>(
point: Point,
polycurve: Polycurve<Point>,
tolerance: number,
) => {
return polycurve.some((curve) => pointOnCurve(point, curve, tolerance));
};
const cubicBezierEquation = <Point extends LocalPoint | GlobalPoint>(
curve: Curve<Point>,
) => {
const [p0, p1, p2, p3] = curve;
// B(t) = p0 * (1-t)^3 + 3p1 * t * (1-t)^2 + 3p2 * t^2 * (1-t) + p3 * t^3
return (t: number, idx: number) =>
Math.pow(1 - t, 3) * p3[idx] +
3 * t * Math.pow(1 - t, 2) * p2[idx] +
3 * Math.pow(t, 2) * (1 - t) * p1[idx] +
p0[idx] * Math.pow(t, 3);
};
const polyLineFromCurve = <Point extends LocalPoint | GlobalPoint>(
curve: Curve<Point>,
segments = 10,
): Polyline<Point> => {
const equation = cubicBezierEquation(curve);
let startingPoint = [equation(0, 0), equation(0, 1)] as Point;
const lineSegments: Polyline<Point> = [];
let t = 0;
const increment = 1 / segments;
for (let i = 0; i < segments; i++) {
t += increment;
if (t <= 1) {
const nextPoint: Point = point(equation(t, 0), equation(t, 1));
lineSegments.push(lineSegment(startingPoint, nextPoint));
startingPoint = nextPoint;
}
}
return lineSegments;
};
export const pointOnCurve = <Point extends LocalPoint | GlobalPoint>(
point: Point,
curve: Curve<Point>,
threshold: number,
) => {
return pointOnPolyline(point, polyLineFromCurve(curve), threshold);
};
export const pointOnPolyline = <Point extends LocalPoint | GlobalPoint>(
point: Point,
polyline: Polyline<Point>,
threshold = 10e-5,
) => {
return polyline.some((line) => pointOnLineSegment(point, line, threshold));
};

281
packages/utils/geometry/geometry.test.ts
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@ -1,249 +1,122 @@
import type { GlobalPoint, LineSegment, Polygon, Radians } from "../../math";
import {
lineIntersectsLine,
lineRotate,
pointInEllipse,
pointInPolygon,
pointLeftofLine,
pointOnCurve,
pointOnEllipse,
pointOnLine,
point,
lineSegment,
polygon,
pointOnLineSegment,
pointOnPolygon,
pointOnPolyline,
pointRightofLine,
pointRotate,
} from "./geometry";
import type { Curve, Ellipse, Line, Point, Polygon, Polyline } from "./shape";
polygonIncludesPoint,
segmentsIntersectAt,
} from "../../math";
import { pointInEllipse, pointOnEllipse, type Ellipse } from "./shape";
describe("point and line", () => {
const line: Line = [
[1, 0],
[1, 2],
];
// const l: Line<GlobalPoint> = line(point(1, 0), point(1, 2));
it("point on left or right of line", () => {
expect(pointLeftofLine([0, 1], line)).toBe(true);
expect(pointLeftofLine([1, 1], line)).toBe(false);
expect(pointLeftofLine([2, 1], line)).toBe(false);
// it("point on left or right of line", () => {
// expect(pointLeftofLine(point(0, 1), l)).toBe(true);
// expect(pointLeftofLine(point(1, 1), l)).toBe(false);
// expect(pointLeftofLine(point(2, 1), l)).toBe(false);
expect(pointRightofLine([0, 1], line)).toBe(false);
expect(pointRightofLine([1, 1], line)).toBe(false);
expect(pointRightofLine([2, 1], line)).toBe(true);
});
// expect(pointRightofLine(point(0, 1), l)).toBe(false);
// expect(pointRightofLine(point(1, 1), l)).toBe(false);
// expect(pointRightofLine(point(2, 1), l)).toBe(true);
// });
const s: LineSegment<GlobalPoint> = lineSegment(point(1, 0), point(1, 2));
it("point on the line", () => {
expect(pointOnLine([0, 1], line)).toBe(false);
expect(pointOnLine([1, 1], line, 0)).toBe(true);
expect(pointOnLine([2, 1], line)).toBe(false);
});
});
describe("point and polylines", () => {
const polyline: Polyline = [
[
[1, 0],
[1, 2],
],
[
[1, 2],
[2, 2],
],
[
[2, 2],
[2, 1],
],
[
[2, 1],
[3, 1],
],
];
it("point on the line", () => {
expect(pointOnPolyline([1, 0], polyline)).toBe(true);
expect(pointOnPolyline([1, 2], polyline)).toBe(true);
expect(pointOnPolyline([2, 2], polyline)).toBe(true);
expect(pointOnPolyline([2, 1], polyline)).toBe(true);
expect(pointOnPolyline([3, 1], polyline)).toBe(true);
expect(pointOnPolyline([1, 1], polyline)).toBe(true);
expect(pointOnPolyline([2, 1.5], polyline)).toBe(true);
expect(pointOnPolyline([2.5, 1], polyline)).toBe(true);
expect(pointOnPolyline([0, 1], polyline)).toBe(false);
expect(pointOnPolyline([2.1, 1.5], polyline)).toBe(false);
});
it("point on the line with rotation", () => {
const truePoints = [
[1, 0],
[1, 2],
[2, 2],
[2, 1],
[3, 1],
] as Point[];
truePoints.forEach((point) => {
const rotation = Math.random() * 360;
const rotatedPoint = pointRotate(point, rotation);
const rotatedPolyline: Polyline = polyline.map((line) =>
lineRotate(line, rotation, [0, 0]),
);
expect(pointOnPolyline(rotatedPoint, rotatedPolyline)).toBe(true);
});
const falsePoints = [
[0, 1],
[2.1, 1.5],
] as Point[];
falsePoints.forEach((point) => {
const rotation = Math.random() * 360;
const rotatedPoint = pointRotate(point, rotation);
const rotatedPolyline: Polyline = polyline.map((line) =>
lineRotate(line, rotation, [0, 0]),
);
expect(pointOnPolyline(rotatedPoint, rotatedPolyline)).toBe(false);
});
expect(pointOnLineSegment(point(0, 1), s)).toBe(false);
expect(pointOnLineSegment(point(1, 1), s, 0)).toBe(true);
expect(pointOnLineSegment(point(2, 1), s)).toBe(false);
});
});
describe("point and polygon", () => {
const polygon: Polygon = [
[10, 10],
[50, 10],
[50, 50],
[10, 50],
];
const poly: Polygon<GlobalPoint> = polygon(
point(10, 10),
point(50, 10),
point(50, 50),
point(10, 50),
);
it("point on polygon", () => {
expect(pointOnPolygon([30, 10], polygon)).toBe(true);
expect(pointOnPolygon([50, 30], polygon)).toBe(true);
expect(pointOnPolygon([30, 50], polygon)).toBe(true);
expect(pointOnPolygon([10, 30], polygon)).toBe(true);
expect(pointOnPolygon([30, 30], polygon)).toBe(false);
expect(pointOnPolygon([30, 70], polygon)).toBe(false);
expect(pointOnPolygon(point(30, 10), poly)).toBe(true);
expect(pointOnPolygon(point(50, 30), poly)).toBe(true);
expect(pointOnPolygon(point(30, 50), poly)).toBe(true);
expect(pointOnPolygon(point(10, 30), poly)).toBe(true);
expect(pointOnPolygon(point(30, 30), poly)).toBe(false);
expect(pointOnPolygon(point(30, 70), poly)).toBe(false);
});
it("point in polygon", () => {
const polygon: Polygon = [
[0, 0],
[2, 0],
[2, 2],
[0, 2],
];
expect(pointInPolygon([1, 1], polygon)).toBe(true);
expect(pointInPolygon([3, 3], polygon)).toBe(false);
});
});
describe("point and curve", () => {
const curve: Curve = [
[1.4, 1.65],
[1.9, 7.9],
[5.9, 1.65],
[6.44, 4.84],
];
it("point on curve", () => {
expect(pointOnCurve(curve[0], curve)).toBe(true);
expect(pointOnCurve(curve[3], curve)).toBe(true);
expect(pointOnCurve([2, 4], curve, 0.1)).toBe(true);
expect(pointOnCurve([4, 4.4], curve, 0.1)).toBe(true);
expect(pointOnCurve([5.6, 3.85], curve, 0.1)).toBe(true);
expect(pointOnCurve([5.6, 4], curve, 0.1)).toBe(false);
expect(pointOnCurve(curve[1], curve, 0.1)).toBe(false);
expect(pointOnCurve(curve[2], curve, 0.1)).toBe(false);
const poly: Polygon<GlobalPoint> = polygon(
point(0, 0),
point(2, 0),
point(2, 2),
point(0, 2),
);
expect(polygonIncludesPoint(point(1, 1), poly)).toBe(true);
expect(polygonIncludesPoint(point(3, 3), poly)).toBe(false);
});
});
describe("point and ellipse", () => {
const ellipse: Ellipse = {
center: [0, 0],
angle: 0,
const ellipse: Ellipse<GlobalPoint> = {
center: point(0, 0),
angle: 0 as Radians,
halfWidth: 2,
halfHeight: 1,
};
it("point on ellipse", () => {
[
[0, 1],
[0, -1],
[2, 0],
[-2, 0],
].forEach((point) => {
expect(pointOnEllipse(point as Point, ellipse)).toBe(true);
[point(0, 1), point(0, -1), point(2, 0), point(-2, 0)].forEach((p) => {
expect(pointOnEllipse(p, ellipse)).toBe(true);
});
expect(pointOnEllipse([-1.4, 0.7], ellipse, 0.1)).toBe(true);
expect(pointOnEllipse([-1.4, 0.71], ellipse, 0.01)).toBe(true);
expect(pointOnEllipse(point(-1.4, 0.7), ellipse, 0.1)).toBe(true);
expect(pointOnEllipse(point(-1.4, 0.71), ellipse, 0.01)).toBe(true);
expect(pointOnEllipse([1.4, 0.7], ellipse, 0.1)).toBe(true);
expect(pointOnEllipse([1.4, 0.71], ellipse, 0.01)).toBe(true);
expect(pointOnEllipse(point(1.4, 0.7), ellipse, 0.1)).toBe(true);
expect(pointOnEllipse(point(1.4, 0.71), ellipse, 0.01)).toBe(true);
expect(pointOnEllipse([1, -0.86], ellipse, 0.1)).toBe(true);
expect(pointOnEllipse([1, -0.86], ellipse, 0.01)).toBe(true);
expect(pointOnEllipse(point(1, -0.86), ellipse, 0.1)).toBe(true);
expect(pointOnEllipse(point(1, -0.86), ellipse, 0.01)).toBe(true);
expect(pointOnEllipse([-1, -0.86], ellipse, 0.1)).toBe(true);
expect(pointOnEllipse([-1, -0.86], ellipse, 0.01)).toBe(true);
expect(pointOnEllipse(point(-1, -0.86), ellipse, 0.1)).toBe(true);
expect(pointOnEllipse(point(-1, -0.86), ellipse, 0.01)).toBe(true);
expect(pointOnEllipse([-1, 0.8], ellipse)).toBe(false);
expect(pointOnEllipse([1, -0.8], ellipse)).toBe(false);
expect(pointOnEllipse(point(-1, 0.8), ellipse)).toBe(false);
expect(pointOnEllipse(point(1, -0.8), ellipse)).toBe(false);
});
it("point in ellipse", () => {
[
[0, 1],
[0, -1],
[2, 0],
[-2, 0],
].forEach((point) => {
expect(pointInEllipse(point as Point, ellipse)).toBe(true);
[point(0, 1), point(0, -1), point(2, 0), point(-2, 0)].forEach((p) => {
expect(pointInEllipse(p, ellipse)).toBe(true);
});
expect(pointInEllipse([-1, 0.8], ellipse)).toBe(true);
expect(pointInEllipse([1, -0.8], ellipse)).toBe(true);
expect(pointInEllipse(point(-1, 0.8), ellipse)).toBe(true);
expect(pointInEllipse(point(1, -0.8), ellipse)).toBe(true);
expect(pointInEllipse([-1, 1], ellipse)).toBe(false);
expect(pointInEllipse([-1.4, 0.8], ellipse)).toBe(false);
expect(pointInEllipse(point(-1, 1), ellipse)).toBe(false);
expect(pointInEllipse(point(-1.4, 0.8), ellipse)).toBe(false);
});
});
describe("line and line", () => {
const lineA: Line = [
[1, 4],
[3, 4],
];
const lineB: Line = [
[2, 1],
[2, 7],
];
const lineC: Line = [
[1, 8],
[3, 8],
];
const lineD: Line = [
[1, 8],
[3, 8],
];
const lineE: Line = [
[1, 9],
[3, 9],
];
const lineF: Line = [
[1, 2],
[3, 4],
];
const lineG: Line = [
[0, 1],
[2, 3],
];
const lineA: LineSegment<GlobalPoint> = lineSegment(point(1, 4), point(3, 4));
const lineB: LineSegment<GlobalPoint> = lineSegment(point(2, 1), point(2, 7));
const lineC: LineSegment<GlobalPoint> = lineSegment(point(1, 8), point(3, 8));
const lineD: LineSegment<GlobalPoint> = lineSegment(point(1, 8), point(3, 8));
const lineE: LineSegment<GlobalPoint> = lineSegment(point(1, 9), point(3, 9));
const lineF: LineSegment<GlobalPoint> = lineSegment(point(1, 2), point(3, 4));
const lineG: LineSegment<GlobalPoint> = lineSegment(point(0, 1), point(2, 3));
it("intersection", () => {
expect(lineIntersectsLine(lineA, lineB)).toBe(true);
expect(lineIntersectsLine(lineA, lineC)).toBe(false);
expect(lineIntersectsLine(lineB, lineC)).toBe(false);
expect(lineIntersectsLine(lineC, lineD)).toBe(true);
expect(lineIntersectsLine(lineE, lineD)).toBe(false);
expect(lineIntersectsLine(lineF, lineG)).toBe(true);
expect(segmentsIntersectAt(lineA, lineB)).toEqual([2, 4]);
expect(segmentsIntersectAt(lineA, lineC)).toBe(null);
expect(segmentsIntersectAt(lineB, lineC)).toBe(null);
expect(segmentsIntersectAt(lineC, lineD)).toBe(null); // Line overlapping line is not intersection!
expect(segmentsIntersectAt(lineE, lineD)).toBe(null);
expect(segmentsIntersectAt(lineF, lineG)).toBe(null);
});
});

1060
packages/utils/geometry/geometry.ts
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404
packages/utils/geometry/shape.ts
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@ -12,9 +12,30 @@
* to pure shapes
*/
import type { Curve, LineSegment, Polygon, Radians } from "../../math";
import {
curve,
lineSegment,
point,
pointDistance,
pointFromArray,
pointFromVector,
pointRotateRads,
polygon,
polygonFromPoints,
PRECISION,
segmentsIntersectAt,
vector,
vectorAdd,
vectorFromPoint,
vectorScale,
type GlobalPoint,
type LocalPoint,
} from "../../math";
import { getElementAbsoluteCoords } from "../../excalidraw/element";
import type {
ElementsMap,
ExcalidrawBindableElement,
ExcalidrawDiamondElement,
ExcalidrawElement,
ExcalidrawEllipseElement,
@ -28,67 +49,54 @@ import type {
ExcalidrawSelectionElement,
ExcalidrawTextElement,
} from "../../excalidraw/element/types";
import { angleToDegrees, close, pointAdd, pointRotate } from "./geometry";
import { pointsOnBezierCurves } from "points-on-curve";
import type { Drawable, Op } from "roughjs/bin/core";
// a point is specified by its coordinate (x, y)
export type Point = [number, number];
export type Vector = Point;
// a line (segment) is defined by two endpoints
export type Line = [Point, Point];
import { invariant } from "../../excalidraw/utils";
// a polyline (made up term here) is a line consisting of other line segments
// this corresponds to a straight line element in the editor but it could also
// be used to model other elements
export type Polyline = Line[];
// cubic bezier curve with four control points
export type Curve = [Point, Point, Point, Point];
export type Polyline<Point extends GlobalPoint | LocalPoint> =
LineSegment<Point>[];
// a polycurve is a curve consisting of ther curves, this corresponds to a complex
// curve on the canvas
export type Polycurve = Curve[];
// a polygon is a closed shape by connecting the given points
// rectangles and diamonds are modelled by polygons
export type Polygon = Point[];
export type Polycurve<Point extends GlobalPoint | LocalPoint> = Curve<Point>[];
// an ellipse is specified by its center, angle, and its major and minor axes
// but for the sake of simplicity, we've used halfWidth and halfHeight instead
// in replace of semi major and semi minor axes
export type Ellipse = {
export type Ellipse<Point extends GlobalPoint | LocalPoint> = {
center: Point;
angle: number;
angle: Radians;
halfWidth: number;
halfHeight: number;
};
export type GeometricShape =
export type GeometricShape<Point extends GlobalPoint | LocalPoint> =
| {
type: "line";
data: Line;
data: LineSegment<Point>;
}
| {
type: "polygon";
data: Polygon;
data: Polygon<Point>;
}
| {
type: "curve";
data: Curve;
data: Curve<Point>;
}
| {
type: "ellipse";
data: Ellipse;
data: Ellipse<Point>;
}
| {
type: "polyline";
data: Polyline;
data: Polyline<Point>;
}
| {
type: "polycurve";
data: Polycurve;
data: Polycurve<Point>;
};
type RectangularElement =
@ -102,32 +110,32 @@ type RectangularElement =
| ExcalidrawSelectionElement;
// polygon
export const getPolygonShape = (
export const getPolygonShape = <Point extends GlobalPoint | LocalPoint>(
element: RectangularElement,
): GeometricShape => {
): GeometricShape<Point> => {
const { angle, width, height, x, y } = element;
const angleInDegrees = angleToDegrees(angle);
const cx = x + width / 2;
const cy = y + height / 2;
const center: Point = [cx, cy];
const center: Point = point(cx, cy);
let data: Polygon = [];
let data: Polygon<Point>;
if (element.type === "diamond") {
data = [
pointRotate([cx, y], angleInDegrees, center),
pointRotate([x + width, cy], angleInDegrees, center),
pointRotate([cx, y + height], angleInDegrees, center),
pointRotate([x, cy], angleInDegrees, center),
] as Polygon;
data = polygon(
pointRotateRads(point(cx, y), center, angle),
pointRotateRads(point(x + width, cy), center, angle),
pointRotateRads(point(cx, y + height), center, angle),
pointRotateRads(point(x, cy), center, angle),
);
} else {
data = [
pointRotate([x, y], angleInDegrees, center),
pointRotate([x + width, y], angleInDegrees, center),
pointRotate([x + width, y + height], angleInDegrees, center),
pointRotate([x, y + height], angleInDegrees, center),
] as Polygon;
data = polygon(
pointRotateRads(point(x, y), center, angle),
pointRotateRads(point(x + width, y), center, angle),
pointRotateRads(point(x + width, y + height), center, angle),
pointRotateRads(point(x, y + height), center, angle),
);
}
return {
@ -137,7 +145,7 @@ export const getPolygonShape = (
};
// return the selection box for an element, possibly rotated as well
export const getSelectionBoxShape = (
export const getSelectionBoxShape = <Point extends GlobalPoint | LocalPoint>(
element: ExcalidrawElement,
elementsMap: ElementsMap,
padding = 10,
@ -153,29 +161,29 @@ export const getSelectionBoxShape = (
y1 -= padding;
y2 += padding;
const angleInDegrees = angleToDegrees(element.angle);
const center: Point = [cx, cy];
const topLeft = pointRotate([x1, y1], angleInDegrees, center);
const topRight = pointRotate([x2, y1], angleInDegrees, center);
const bottomLeft = pointRotate([x1, y2], angleInDegrees, center);
const bottomRight = pointRotate([x2, y2], angleInDegrees, center);
//const angleInDegrees = angleToDegrees(element.angle);
const center = point(cx, cy);
const topLeft = pointRotateRads(point(x1, y1), center, element.angle);
const topRight = pointRotateRads(point(x2, y1), center, element.angle);
const bottomLeft = pointRotateRads(point(x1, y2), center, element.angle);
const bottomRight = pointRotateRads(point(x2, y2), center, element.angle);
return {
type: "polygon",
data: [topLeft, topRight, bottomRight, bottomLeft],
} as GeometricShape;
} as GeometricShape<Point>;
};
// ellipse
export const getEllipseShape = (
export const getEllipseShape = <Point extends GlobalPoint | LocalPoint>(
element: ExcalidrawEllipseElement,
): GeometricShape => {
): GeometricShape<Point> => {
const { width, height, angle, x, y } = element;
return {
type: "ellipse",
data: {
center: [x + width / 2, y + height / 2],
center: point(x + width / 2, y + height / 2),
angle,
halfWidth: width / 2,
halfHeight: height / 2,
@ -193,32 +201,34 @@ export const getCurvePathOps = (shape: Drawable): Op[] => {
};
// linear
export const getCurveShape = (
export const getCurveShape = <Point extends GlobalPoint | LocalPoint>(
roughShape: Drawable,
startingPoint: Point = [0, 0],
angleInRadian: number,
startingPoint: Point = point(0, 0),
angleInRadian: Radians,
center: Point,
): GeometricShape => {
const transform = (p: Point) =>
pointRotate(
[p[0] + startingPoint[0], p[1] + startingPoint[1]],
angleToDegrees(angleInRadian),
): GeometricShape<Point> => {
const transform = (p: Point): Point =>
pointRotateRads(
point(p[0] + startingPoint[0], p[1] + startingPoint[1]),
center,
angleInRadian,
);
const ops = getCurvePathOps(roughShape);
const polycurve: Polycurve = [];
let p0: Point = [0, 0];
const polycurve: Polycurve<Point> = [];
let p0 = point<Point>(0, 0);
for (const op of ops) {
if (op.op === "move") {
p0 = transform(op.data as Point);
const p = pointFromArray<Point>(op.data);
invariant(p != null, "Ops data is not a point");
p0 = transform(p);
}
if (op.op === "bcurveTo") {
const p1: Point = transform([op.data[0], op.data[1]]);
const p2: Point = transform([op.data[2], op.data[3]]);
const p3: Point = transform([op.data[4], op.data[5]]);
polycurve.push([p0, p1, p2, p3]);
const p1 = transform(point<Point>(op.data[0], op.data[1]));
const p2 = transform(point<Point>(op.data[2], op.data[3]));
const p3 = transform(point<Point>(op.data[4], op.data[5]));
polycurve.push(curve<Point>(p0, p1, p2, p3));
p0 = p3;
}
}
@ -229,61 +239,72 @@ export const getCurveShape = (
};
};
const polylineFromPoints = (points: Point[]) => {
let previousPoint = points[0];
const polyline: Polyline = [];
const polylineFromPoints = <Point extends GlobalPoint | LocalPoint>(
points: Point[],
): Polyline<Point> => {
let previousPoint: Point = points[0];
const polyline: LineSegment<Point>[] = [];
for (let i = 1; i < points.length; i++) {
const nextPoint = points[i];
polyline.push([previousPoint, nextPoint]);
polyline.push(lineSegment<Point>(previousPoint, nextPoint));
previousPoint = nextPoint;
}
return polyline;
};
export const getFreedrawShape = (
export const getFreedrawShape = <Point extends GlobalPoint | LocalPoint>(
element: ExcalidrawFreeDrawElement,
center: Point,
isClosed: boolean = false,
): GeometricShape => {
const angle = angleToDegrees(element.angle);
): GeometricShape<Point> => {
const transform = (p: Point) =>
pointRotate(pointAdd(p, [element.x, element.y] as Point), angle, center);
pointRotateRads(
pointFromVector(
vectorAdd(vectorFromPoint(p), vector(element.x, element.y)),
),
center,
element.angle,
);
const polyline = polylineFromPoints(
element.points.map((p) => transform(p as Point)),
);
return isClosed
return (
isClosed
? {
type: "polygon",
data: close(polyline.flat()) as Polygon,
data: polygonFromPoints(polyline.flat()),
}
: {
type: "polyline",
data: polyline,
};
}
) as GeometricShape<Point>;
};
export const getClosedCurveShape = (
export const getClosedCurveShape = <Point extends GlobalPoint | LocalPoint>(
element: ExcalidrawLinearElement,
roughShape: Drawable,
startingPoint: Point = [0, 0],
angleInRadian: number,
startingPoint: Point = point<Point>(0, 0),
angleInRadian: Radians,
center: Point,
): GeometricShape => {
): GeometricShape<Point> => {
const transform = (p: Point) =>
pointRotate(
[p[0] + startingPoint[0], p[1] + startingPoint[1]],
angleToDegrees(angleInRadian),
pointRotateRads(
point(p[0] + startingPoint[0], p[1] + startingPoint[1]),
center,
angleInRadian,
);
if (element.roundness === null) {
return {
type: "polygon",
data: close(element.points.map((p) => transform(p as Point))),
data: polygonFromPoints(
element.points.map((p) => transform(p as Point)) as Point[],
),
};
}
@ -295,27 +316,218 @@ export const getClosedCurveShape = (
if (operation.op === "move") {
odd = !odd;
if (odd) {
points.push([operation.data[0], operation.data[1]]);
points.push(point(operation.data[0], operation.data[1]));
}
} else if (operation.op === "bcurveTo") {
if (odd) {
points.push([operation.data[0], operation.data[1]]);
points.push([operation.data[2], operation.data[3]]);
points.push([operation.data[4], operation.data[5]]);
points.push(point(operation.data[0], operation.data[1]));
points.push(point(operation.data[2], operation.data[3]));
points.push(point(operation.data[4], operation.data[5]));
}
} else if (operation.op === "lineTo") {
if (odd) {
points.push([operation.data[0], operation.data[1]]);
points.push(point(operation.data[0], operation.data[1]));
}
}
}
const polygonPoints = pointsOnBezierCurves(points, 10, 5).map((p) =>
transform(p),
);
transform(p as Point),
) as Point[];
return {
type: "polygon",
data: polygonPoints,
data: polygonFromPoints<Point>(polygonPoints),
};
};
/**
* Determine intersection of a rectangular shaped element and a
* line segment.
*
* @param element The rectangular element to test against
* @param segment The segment intersecting the element
* @param gap Optional value to inflate the shape before testing
* @returns An array of intersections
*/
// TODO: Replace with final rounded rectangle code
export const segmentIntersectRectangleElement = <
Point extends LocalPoint | GlobalPoint,
>(
element: ExcalidrawBindableElement,
segment: LineSegment<Point>,
gap: number = 0,
): Point[] => {
const bounds = [
element.x - gap,
element.y - gap,
element.x + element.width + gap,
element.y + element.height + gap,
];
const center = point(
(bounds[0] + bounds[2]) / 2,
(bounds[1] + bounds[3]) / 2,
);
return [
lineSegment(
pointRotateRads(point(bounds[0], bounds[1]), center, element.angle),
pointRotateRads(point(bounds[2], bounds[1]), center, element.angle),
),
lineSegment(
pointRotateRads(point(bounds[2], bounds[1]), center, element.angle),
pointRotateRads(point(bounds[2], bounds[3]), center, element.angle),
),
lineSegment(
pointRotateRads(point(bounds[2], bounds[3]), center, element.angle),
pointRotateRads(point(bounds[0], bounds[3]), center, element.angle),
),
lineSegment(
pointRotateRads(point(bounds[0], bounds[3]), center, element.angle),
pointRotateRads(point(bounds[0], bounds[1]), center, element.angle),
),
]
.map((s) => segmentsIntersectAt(segment, s))
.filter((i): i is Point => !!i);
};
const distanceToEllipse = <Point extends LocalPoint | GlobalPoint>(
p: Point,
ellipse: Ellipse<Point>,
) => {
const { angle, halfWidth, halfHeight, center } = ellipse;
const a = halfWidth;
const b = halfHeight;
const translatedPoint = vectorAdd(
vectorFromPoint(p),
vectorScale(vectorFromPoint(center), -1),
);
const [rotatedPointX, rotatedPointY] = pointRotateRads(
pointFromVector(translatedPoint),
point(0, 0),
-angle as Radians,
);
const px = Math.abs(rotatedPointX);
const py = Math.abs(rotatedPointY);
let tx = 0.707;
let ty = 0.707;
for (let i = 0; i < 3; i++) {
const x = a * tx;
const y = b * ty;
const ex = ((a * a - b * b) * tx ** 3) / a;
const ey = ((b * b - a * a) * ty ** 3) / b;
const rx = x - ex;
const ry = y - ey;
const qx = px - ex;
const qy = py - ey;
const r = Math.hypot(ry, rx);
const q = Math.hypot(qy, qx);
tx = Math.min(1, Math.max(0, ((qx * r) / q + ex) / a));
ty = Math.min(1, Math.max(0, ((qy * r) / q + ey) / b));
const t = Math.hypot(ty, tx);
tx /= t;
ty /= t;
}
const [minX, minY] = [
a * tx * Math.sign(rotatedPointX),
b * ty * Math.sign(rotatedPointY),
];
return pointDistance(point(rotatedPointX, rotatedPointY), point(minX, minY));
};
export const pointOnEllipse = <Point extends LocalPoint | GlobalPoint>(
point: Point,
ellipse: Ellipse<Point>,
threshold = PRECISION,
) => {
return distanceToEllipse(point, ellipse) <= threshold;
};
export const pointInEllipse = <Point extends LocalPoint | GlobalPoint>(
p: Point,
ellipse: Ellipse<Point>,
) => {
const { center, angle, halfWidth, halfHeight } = ellipse;
const translatedPoint = vectorAdd(
vectorFromPoint(p),
vectorScale(vectorFromPoint(center), -1),
);
const [rotatedPointX, rotatedPointY] = pointRotateRads(
pointFromVector(translatedPoint),
point(0, 0),
-angle as Radians,
);
return (
(rotatedPointX / halfWidth) * (rotatedPointX / halfWidth) +
(rotatedPointY / halfHeight) * (rotatedPointY / halfHeight) <=
1
);
};
export const ellipseAxes = <Point extends LocalPoint | GlobalPoint>(
ellipse: Ellipse<Point>,
) => {
const widthGreaterThanHeight = ellipse.halfWidth > ellipse.halfHeight;
const majorAxis = widthGreaterThanHeight
? ellipse.halfWidth * 2
: ellipse.halfHeight * 2;
const minorAxis = widthGreaterThanHeight
? ellipse.halfHeight * 2
: ellipse.halfWidth * 2;
return {
majorAxis,
minorAxis,
};
};
export const ellipseFocusToCenter = <Point extends LocalPoint | GlobalPoint>(
ellipse: Ellipse<Point>,
) => {
const { majorAxis, minorAxis } = ellipseAxes(ellipse);
return Math.sqrt(majorAxis ** 2 - minorAxis ** 2);
};
export const ellipseExtremes = <Point extends LocalPoint | GlobalPoint>(
ellipse: Ellipse<Point>,
) => {
const { center, angle } = ellipse;
const { majorAxis, minorAxis } = ellipseAxes(ellipse);
const cos = Math.cos(angle);
const sin = Math.sin(angle);
const sqSum = majorAxis ** 2 + minorAxis ** 2;
const sqDiff = (majorAxis ** 2 - minorAxis ** 2) * Math.cos(2 * angle);
const yMax = Math.sqrt((sqSum - sqDiff) / 2);
const xAtYMax =
(yMax * sqSum * sin * cos) /
(majorAxis ** 2 * sin ** 2 + minorAxis ** 2 * cos ** 2);
const xMax = Math.sqrt((sqSum + sqDiff) / 2);
const yAtXMax =
(xMax * sqSum * sin * cos) /
(majorAxis ** 2 * cos ** 2 + minorAxis ** 2 * sin ** 2);
const centerVector = vectorFromPoint(center);
return [
vectorAdd(vector(xAtYMax, yMax), centerVector),
vectorAdd(vectorScale(vector(xAtYMax, yMax), -1), centerVector),
vectorAdd(vector(xMax, yAtXMax), centerVector),
vectorAdd(vector(xMax, yAtXMax), centerVector),
];
};

54
packages/utils/withinBounds.ts
View File

@ -11,16 +11,21 @@ import {
isLinearElement,
isTextElement,
} from "../excalidraw/element/typeChecks";
import { isValueInRange, rotatePoint } from "../excalidraw/math";
import type { Point } from "../excalidraw/types";
import type { Bounds } from "../excalidraw/element/bounds";
import { getElementBounds } from "../excalidraw/element/bounds";
import { arrayToMap } from "../excalidraw/utils";
import type { LocalPoint } from "../math";
import {
rangeIncludesValue,
point,
pointRotateRads,
rangeInclusive,
} from "../math";
type Element = NonDeletedExcalidrawElement;
type Elements = readonly NonDeletedExcalidrawElement[];
type Points = readonly Point[];
type Points = readonly LocalPoint[];
/** @returns vertices relative to element's top-left [0,0] position */
const getNonLinearElementRelativePoints = (
@ -28,20 +33,25 @@ const getNonLinearElementRelativePoints = (
Element,
ExcalidrawLinearElement | ExcalidrawFreeDrawElement
>,
): [TopLeft: Point, TopRight: Point, BottomRight: Point, BottomLeft: Point] => {
): [
TopLeft: LocalPoint,
TopRight: LocalPoint,
BottomRight: LocalPoint,
BottomLeft: LocalPoint,
] => {
if (element.type === "diamond") {
return [
[element.width / 2, 0],
[element.width, element.height / 2],
[element.width / 2, element.height],
[0, element.height / 2],
point(element.width / 2, 0),
point(element.width, element.height / 2),
point(element.width / 2, element.height),
point(0, element.height / 2),
];
}
return [
[0, 0],
[0 + element.width, 0],
[0 + element.width, element.height],
[0, element.height],
point(0, 0),
point(0 + element.width, 0),
point(0 + element.width, element.height),
point(0, element.height),
];
};
@ -84,10 +94,10 @@ const getRotatedBBox = (element: Element): Bounds => {
const points = getElementRelativePoints(element);
const { cx, cy } = getMinMaxPoints(points);
const centerPoint: Point = [cx, cy];
const centerPoint = point<LocalPoint>(cx, cy);
const rotatedPoints = points.map((point) =>
rotatePoint([point[0], point[1]], centerPoint, element.angle),
const rotatedPoints = points.map((p) =>
pointRotateRads(p, centerPoint, element.angle),
);
const { minX, minY, maxX, maxY } = getMinMaxPoints(rotatedPoints);
@ -135,10 +145,16 @@ export const elementPartiallyOverlapsWithOrContainsBBox = (
const elementBBox = getRotatedBBox(element);
return (
(isValueInRange(elementBBox[0], bbox[0], bbox[2]) ||
isValueInRange(bbox[0], elementBBox[0], elementBBox[2])) &&
(isValueInRange(elementBBox[1], bbox[1], bbox[3]) ||
isValueInRange(bbox[1], elementBBox[1], elementBBox[3]))
(rangeIncludesValue(elementBBox[0], rangeInclusive(bbox[0], bbox[2])) ||
rangeIncludesValue(
bbox[0],
rangeInclusive(elementBBox[0], elementBBox[2]),
)) &&
(rangeIncludesValue(elementBBox[1], rangeInclusive(bbox[1], bbox[3])) ||
rangeIncludesValue(
bbox[1],
rangeInclusive(elementBBox[1], elementBBox[3]),
))
);
};

108
scripts/buildMath.js Normal file
View File

@ -0,0 +1,108 @@
const fs = require("fs");
const { build } = require("esbuild");
const browserConfig = {
entryPoints: ["index.ts"],
bundle: true,
format: "esm",
};
// Will be used later for treeshaking
// function getFiles(dir, files = []) {
// const fileList = fs.readdirSync(dir);
// for (const file of fileList) {
// const name = `${dir}/${file}`;
// if (
// name.includes("node_modules") ||
// name.includes("config") ||
// name.includes("package.json") ||
// name.includes("main.js") ||
// name.includes("index-node.ts") ||
// name.endsWith(".d.ts") ||
// name.endsWith(".md")
// ) {
// continue;
// }
// if (fs.statSync(name).isDirectory()) {
// getFiles(name, files);
// } else if (
// name.match(/\.(sa|sc|c)ss$/) ||
// name.match(/\.(woff|woff2|eot|ttf|otf)$/) ||
// name.match(/locales\/[^/]+\.json$/)
// ) {
// continue;
// } else {
// files.push(name);
// }
// }
// return files;
// }
const createESMBrowserBuild = async () => {
// Development unminified build with source maps
const browserDev = await build({
...browserConfig,
outdir: "dist/browser/dev",
sourcemap: true,
metafile: true,
define: {
"import.meta.env": JSON.stringify({ DEV: true }),
},
});
fs.writeFileSync(
"meta-browser-dev.json",
JSON.stringify(browserDev.metafile),
);
// production minified build without sourcemaps
const browserProd = await build({
...browserConfig,
outdir: "dist/browser/prod",
minify: true,
metafile: true,
define: {
"import.meta.env": JSON.stringify({ PROD: true }),
},
});
fs.writeFileSync(
"meta-browser-prod.json",
JSON.stringify(browserProd.metafile),
);
};
const rawConfig = {
entryPoints: ["index.ts"],
bundle: true,
format: "esm",
packages: "external",
};
const createESMRawBuild = async () => {
// Development unminified build with source maps
const rawDev = await build({
...rawConfig,
outdir: "dist/dev",
sourcemap: true,
metafile: true,
define: {
"import.meta.env": JSON.stringify({ DEV: true }),
},
});
fs.writeFileSync("meta-raw-dev.json", JSON.stringify(rawDev.metafile));
// production minified build without sourcemaps
const rawProd = await build({
...rawConfig,
outdir: "dist/prod",
minify: true,
metafile: true,
define: {
"import.meta.env": JSON.stringify({ PROD: true }),
},
});
fs.writeFileSync("meta-raw-prod.json", JSON.stringify(rawProd.metafile));
};
createESMRawBuild();
createESMBrowserBuild();