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