You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
23 lines
535 B
23 lines
535 B
4 months ago
|
import { vec2 } from 'gl-matrix';
|
||
|
|
import { direction } from './direction';
|
||
|
|
/**
|
||
|
|
* 二维向量 v1 到 v2 的夹角
|
||
|
|
* @param v1
|
||
|
|
* @param v2
|
||
|
|
* @param direct
|
||
|
|
*/
|
||
|
|
export function angleTo(v1, v2, direct) {
|
||
|
|
var ang = vec2.angle(v1, v2);
|
||
|
|
var angleLargeThanPI = direction(v1, v2) >= 0;
|
||
|
|
if (direct) {
|
||
|
|
if (angleLargeThanPI) {
|
||
|
|
return Math.PI * 2 - ang;
|
||
|
|
}
|
||
|
|
return ang;
|
||
|
|
}
|
||
|
|
if (angleLargeThanPI) {
|
||
|
|
return ang;
|
||
|
|
}
|
||
|
|
return Math.PI * 2 - ang;
|
||
|
|
}
|
||
|
|
//# sourceMappingURL=angle-to.js.map
|