Cocos Creator 滑鼠滑動3D圖形效果

start () {
        systemEvent.on(SystemEvent.EventType.TOUCH_MOVE, this.onTouchMove, this);
    }

    onTouchMove(event: EventTouch) {
        let dif = event.getDelta();
        let q_tmp = new Quat();
        let v_tmp = new Vec3(-dif.y, dif.x, 0);
        v_tmp.normalize();
        let out_Q = Quat.rotateAround(q_tmp, this.node.rotation, v_tmp, Math.PI * 0.01);
        this.node.setRotation(out_Q.x, out_Q.y, out_Q.z, out_Q.w);
    }