11 lines
309 B
TypeScript
11 lines
309 B
TypeScript
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import { Vector2 } from "three";
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export default function getArea(points: Vector2[]): number {
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let sum = 0;
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for (let i = 0; i < points.length; i++) {
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const j = (i + 1) % points.length;
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sum += points[i].x * points[j].y - points[j].x * points[i].y;
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}
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return Math.abs(sum / 2);
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}
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