[0]转换2D屏幕坐标系统到3D正交投影下的坐标系统位置偏差

let cube = new MeshSprite3D(PrimitiveMesh.createBox()); 

scene.addChild(cube);

let pos = new Vector3();

let screenPos = new Vector3();

Laya.timer.frameLoop(1, this, ()=>{

    camera.orthographic = true;

    screenPos.setValue(camera.clientWidth / 2, camera.clientHeight / 2, 0.1);                                      //converScreenToCoordToOrthographicCoord传的screenPos应该是这个3d模型在摄像机rt内的屏幕坐标

    camera.convertScreenCoordToOrthographicCoord(screenPos, pos);

    cube.transform.position = pos;

});