threejs求两个向量的夹角

threejs求两个向量的夹角

var v1 = new THREE.Vector3(1,0,0);
var v2 = new THREE.Vector3(0,1,0);
var angle1 = v1.angleTo(v2);  //
var angle2 = v2.angleTo(v1);  //

console.log(angle1);
console.log(angle2);

1.5707963267948966
1.5707963267948966

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