クオータニオンを使ってマウスで回転

クオータニオンのメモ class Quaternion { constructor (w = 0, x = 0, y = 0, z = 0) { this.w = w; this.x = x; this.y = y; this.z = z; } add ({w, x, y, z}) { this.w += w; this.x += x; this.y += y; this.z += z; return this; } mult ({w, x, y, z}…