正常的四元数
从法线向量构建ThreeJS四元数。
这对于使网格在矢量方向上“指向”很有用。
const quaternionFromNormal = require ( 'three-quaternion-from-normal' ) ;
// Say we want mesh to point from A to B point
const A = new THREE . Vector3 ( 1 , 0 , 0 ) ;
const B = new THREE . Vector3 ( 2 , 5 , - 1 ) ;
// Get normal A->B
const normal = B . clone ( ) . sub ( A ) . normalize ( ) ;
// Get orientation
const quaternion = quaternionFromNormal
