[0]官方3d demo发布qq小游戏，射线检测偏移,论坛中的方案都试过，不行，是否是这个版本的问题

import { ui } from "./../ui/layaMaxUI";
/**
 * 本示例采用非脚本的方式实现，而使用继承页面基类，实现页面逻辑。在IDE里面设置场景的Runtime属性即可和场景进行关联
 * 相比脚本方式，继承式页面类，可以直接使用页面定义的属性（通过IDE内var属性定义），比如this.tipLbll，this.scoreLbl，具有代码提示效果
 * 建议：如果是页面级的逻辑，需要频繁访问页面内多个元素，使用继承式写法，如果是独立小模块，功能单一，建议用脚本方式实现，比如子弹脚本。
 */
export default class GameUI extends ui.test.TestSceneUI {
    private camera2D: Laya.Camera;
    private _tempRay: Laya.Ray = new Laya.Ray(new Laya.Vector3(), new Laya.Vector3());
    private _tempHitResult: Laya.HitResult = new Laya.HitResult();
    private _tempVector2: Laya.Vector2 = new Laya.Vector2();
    private _scene:Laya.Scene3D = null;
    constructor() {
        super();
       
        //添加3D场景
        var scene: Laya.Scene3D = Laya.stage.addChild(new Laya.Scene3D()) as Laya.Scene3D;
        this._scene = scene;
        //添加照相机
        var camera: Laya.Camera = (scene.addChild(new Laya.Camera(0, 0.1, 100))) as Laya.Camera;
        camera.transform.translate(new Laya.Vector3(0, 3, 3));
        camera.transform.rotate(new Laya.Vector3(-30, 0, 0), true, false);
        this.camera2D = camera;
        //添加方向光
        var directionLight: Laya.DirectionLight = scene.addChild(new Laya.DirectionLight()) as Laya.DirectionLight;
        directionLight.color = new Laya.Vector3(0.6, 0.6, 0.6);
        directionLight.transform.worldMatrix.setForward(new Laya.Vector3(1, -1, 0)); 
        //添加自定义模型
        var box: Laya.MeshSprite3D = scene.addChild(new Laya.MeshSprite3D(Laya.PrimitiveMesh.createBox(1, 1, 1))) as Laya.MeshSprite3D;
        box.transform.rotate(new Laya.Vector3(0, 45, 0), false, false);
        var material: Laya.BlinnPhongMaterial = new Laya.BlinnPhongMaterial();
        Laya.Texture2D.load("res/layabox.png", Laya.Handler.create(null, function(tex:Laya.Texture2D) {
                material.albedoTexture = tex;
        }));
        box.meshRenderer.material = material; 
        //给模型添加碰撞组件
        let meshCollider = box.addComponent(Laya.PhysicsCollider);
        //创建网格碰撞器
        let meshShape = new Laya.MeshColliderShape();
        //获取模型的mesh
        meshShape.mesh = box.meshFilter.sharedMesh;
        //设置模型的碰撞形状
        meshCollider.colliderShape = meshShape;
    }
    onEnable(): void {
        Laya.stage.on(Laya.Event.MOUSE_DOWN, this, this.onMouseDown);
    }
    public onMouseDown(): void {
        this.mouseTouchRayCast(this.camera2D);
    }
    private mouseTouchRayCast(camera: Laya.Camera): void {
        let point = this._tempVector2;
        let ray = this._tempRay;
        point.x = Laya.MouseManager.instance.mouseX;
        point.y = Laya.MouseManager.instance.mouseY;
        camera.viewportPointToRay(point, ray);
        let outHitResult = this._tempHitResult;
        outHitResult.succeeded = false;
        (this._scene as Laya.Scene3D).physicsSimulation.rayCast(ray, outHitResult)
        if (outHitResult.succeeded) {
            console.log("碰撞到物体！！")
        }
    }
}