主要代码如下：
Laya.class(MousePickingScene, "MousePickingScene", Laya.Scene);
function MousePickingScene() {
	MousePickingScene.super(this);
	this.camera = new Laya.Camera(0,0.1,100);
	this.addChild(this.camera);
	this.camera.clearFlag = Laya.BaseCamera.CLEARFLAG_SKY;
	this.skyBox = new Laya.SkyBox();
	this.camera.sky = this.skyBox;
	this.skyBox.textureCube = Laya.TextureCube.load("skyBox/skyCube.ltc");
	this.camera.addComponent(VRCameraMoveScript);
	this.ray = new Laya.Ray(new Laya.Vector3(0, 0, 0), new Laya.Vector3(0, 0, 0));
	this.point = new Laya.Vector2();
	this._outHitInfo = new Laya.RaycastHit();
	// this.phasorSpriter3D = new Laya.PhasorSpriter3D();
}

MousePickingScene.prototype.lateRender = function (state) {
	MousePickingScene.__super.prototype.lateRender.call(state);
	//从屏幕空间生成射线
	this.point.elements[0] = Laya.stage.mouseX;
	this.point.elements[1] = Laya.stage.mouseY;
	this.camera.viewportPointToRay(this.point, this.ray);
	//11111111111111就是下面这句报错
	Laya.Physics.rayCast(this.ray, this._outHitInfo, Number.MAX_VALUE, 10);
	if (this._outHitInfo.sprite3D.name === "tlj"){
		isRotate = !isRotate;
	}
	// this.phasorSpriter3D.begin(Laya.WebGLContext.LINES, state);
	// //绘出射线
	// this.phasorSpriter3D.line(this.ray.origin.x, this.ray.origin.y, this.ray.origin.z, 1.0, 0.0, 0.0, 1.0, 0, -1, 0, 1.0, 0.0, 0.0, 1.0);
	// this.phasorSpriter3D.end();
}


var Stage       = Laya.Stage;
var Text        = Laya.Text;
var Geolocation = Laya.Geolocation;
var Position    = Laya.Position;
var Browser     = Laya.Browser;
var Handler     = Laya.Handler;


// 百度地图
var map;
var marker;
var BMap = Browser.window.BMap;
var convertor = new BMap.Convertor();
// Div用来显示地图
var mapDiv;

var infoText;

var scene;
var mySwitch;
var target;
var isRotate = true;
(function()
{

	Laya3D.init(0, 0,true);
	Laya.stage.scaleMode = Laya.Stage.SCALE_FULL;
	Laya.stage.screenMode = Laya.Stage.SCREEN_NONE;

	scene = Laya.stage.addChild(new Laya.Scene());
	scene.shadingMode = Laya.BaseScene.VERTEX_SHADING;
	Laya.stage.addChild(new MousePickingScene());

	// Laya.init(Browser.width, Browser.height);
	// Laya.stage.scaleMode = Stage.SCALE_NOSCALE;
	infoText = "距离：null";
	mySwitch = true;
	target = new BMap.Point(113.392307, 23.062487); 

	createDom();
	initMap();
	createButton();
	
	var successHandler = new Handler(this, updatePosition);
	var errorHandler = new Handler(this, onError);
	// 使用高精度位置
	Geolocation.enableHighAccuracy = true;
	Geolocation.watchPosition(successHandler, errorHandler);
	
	// 绑定作用域
	convertToBaiduCoord = convertToBaiduCoord.bind(this);
})();