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23 lines
535 B
23 lines
535 B
import { vec2 } from 'gl-matrix';
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import { direction } from './direction';
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/**
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* 二维向量 v1 到 v2 的夹角
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* @param v1
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* @param v2
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* @param direct
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*/
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export function angleTo(v1, v2, direct) {
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var ang = vec2.angle(v1, v2);
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var angleLargeThanPI = direction(v1, v2) >= 0;
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if (direct) {
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if (angleLargeThanPI) {
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return Math.PI * 2 - ang;
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}
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return ang;
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}
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if (angleLargeThanPI) {
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return ang;
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}
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return Math.PI * 2 - ang;
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}
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//# sourceMappingURL=angle-to.js.map
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