[]viewportPointToRay产生的射线始终有偏差，是为什么？

请问这个问题有解决吗？

我添加了一个SceneScript来绘制Ray的射线，发现确实位置不正确：

    import Camera = Laya.Camera;

    import PhasorSpriter3D = Laya.PhasorSpriter3D;

    import Ray = Laya.Ray;

    import RenderState = Laya.RenderState;

    import Script = Laya.Script;

    import Vector2 = Laya.Vector2;

    import Vector3 = Laya.Vector3;

    import Vector4 = Laya.Vector4;

    import WebGLContext = Laya.WebGLContext;



    export class SceneScript extends Script {

        private _originPosition:Vector3 = new Vector3(0, -1, 1);

        private _phasorSpriter3D:PhasorSpriter3D;

        private _color:Vector4 = new Vector4(1, 0, 0, 1);

        private _point:Vector2 = new Vector2();

        private _camera:Camera;

        private _ray:Ray = new Ray(new Vector3(0, 0, 0), new Vector3(0, 0, 0));



        public _start(state:RenderState):void {

            super._start(state);



            this._phasorSpriter3D = new PhasorSpriter3D();

            this._camera = this._owner.getChildByName("Camera") as Camera;

        }



        public _postRenderUpdate(state:RenderState):void {

            super._update(state);



            this._point.elements[0] = Laya.stage.mouseX;

            this._point.elements[1] = Laya.stage.mouseY;

            this._camera.viewportPointToRay(this._point, this._ray);



            this._phasorSpriter3D.begin(WebGLContext.LINES, this._camera);

            

            //绘出射线

            this._phasorSpriter3D.line(

                this._ray.origin, 

                this._color, 

                this._originPosition, 

                this._color);



            this._phasorSpriter3D.end();

        }

    }

结果出来是图片中的结果：



鼠标的位置在戒指的图标处，但是摄像的终点位置却不对。
 

附件中就是测试工程，Ray和鼠标之间有偏差~
测试主要是因为：
Laya.stage.scaleMode = Laya.Stage.SCALE_SHOWALL;
这个缩放模式引起的，这种模式下有什么特别要注意的地方么，构造Ray的时候~

import Camera = Laya.Camera;

import PhasorSpriter3D = Laya.PhasorSpriter3D;

import Ray = Laya.Ray;

import RenderState = Laya.RenderState;

import Script = Laya.Script;

import Vector2 = Laya.Vector2;

import Vector3 = Laya.Vector3;

import Vector4 = Laya.Vector4;

import WebGLContext = Laya.WebGLContext;



class SceneScript extends Script {

    private _originPosition: Vector3 = new Vector3(0, 0, 0);

    private _phasorSpriter3D: PhasorSpriter3D;

    private _color: Vector4 = new Vector4(1, 0, 0, 1);

    private _point: Vector2 = new Vector2();

    private _camera: Camera;

    private _ray: Ray = new Ray(new Vector3(0, 0, 0), new Vector3(0, 0, 0));



    public _start(state: RenderState): void {

        super._start(state);



        this._phasorSpriter3D = new PhasorSpriter3D();

        this._camera = this._owner.getChildByName("Camera") as Camera;

    }



    public _postRenderUpdate(state: RenderState): void {

        super._update(state);



        this._point.elements[0] = Laya.stage.mouseX;

        this._point.elements[1] = Laya.stage.mouseY;

        this._camera.viewportPointToRay(this._point, this._ray);



        this._phasorSpriter3D.begin(WebGLContext.LINES, this._camera);



        // 绘出射线

        this._phasorSpriter3D.line(

            this._ray.origin,

            this._color,

            this._originPosition,

            this._color);



        this._phasorSpriter3D.end();

    }

}



// 程序入口

class GameMain {

    constructor() {

        Laya3D.init(1334, 768, true, true);



        Laya.stage.alignV = Laya.Stage.ALIGN_MIDDLE;

        Laya.stage.alignH = Laya.Stage.ALIGN_CENTER;



        Laya.stage.scaleMode = Laya.Stage.SCALE_SHOWALL;

        Laya.stage.bgColor = "#232628";



        Laya.Stat.show();



        let camera: Laya.Camera = new Laya.Camera();

        camera.name = "Camera";

        camera.transform.position = new Laya.Vector3(

            -6.87492561340332, 3.95000958442688, 1.06434166431427);

        camera.transform.rotation = new Laya.Quaternion(

            -0.19387270510196686,

            -0.6291995048522949,

            -0.16616787016391754,

            0.7341046333312988);

        let scene: Laya.Scene = new Laya.Scene();

        scene.addChild(camera);

        scene.addScript(SceneScript);

        Laya.stage.addChild(scene);

    }

}



new GameMain();

自己new的摄像机和射线检测误差没有关系
参考 引擎示例 -3d--射线检测--射线检测
这个示例
这恶鬼示例没有误差

Laya.stage.scaleMode = Laya.Stage.SCALE_SHOWALL;
设置了这种scaleMode之后，计算射线就会出问题，请看看附件的工程。

 
要射出的点进行以下处理之后就可以了
this.point = this.changeToClientWorld(this.point)
//在showall模式下将屏幕坐标转换到client空间坐标，为射线检测偏差使用
public changeToClientWorld(input:Laya.Vector2):Laya.Vector2
{
let ratioX = (input.x / Laya.stage.width);
let ratioY = (input.y / Laya.stage.height);
let clientWidth = Laya.stage.clientScaleX * Laya.stage.width
let clientHeight = Laya.stage.clientScaleY * Laya.stage.height
 
// let singleX = (Laya.Browser.width - clientWidth)/2;
// let singleY = (Laya.Browser.height - clientHeight)/2;
input.x = ratioX * clientWidth;//singleX,Y 看效果自行修改
input.y = ratioY * clientHeight;
return input;
}

看一下文档 http://ldc.layabox.com/doc/?nav=zh-as-4-0-13