function Layer3D(layer)
{
	this.layer = layer;
	
	this.paint = {
		value:null,
		beginPaint:false,
		currentId:null
	};
	
		//模型集合
	this.collectMeshes = {
		//能够引起碰撞的mesh
		collidableMeshes:[],
		//软饰
		softDecorationMeshes:[],
		//门、窗、墙、地板等等
		roomWallMeshes:[],
		glassBoxMeshes:[],
		//编辑模型的时候，出现的箭头
		arrowMeshes:[]
	};
	
	this.scene3D = new Scene3D();
	this.materials;
	this.decorate3D;
	this.modelLoader;
	this.action3D;
	
};

Layer3D.prototype.clearSymbol=function()
{
	
	for(var i=0;i<this.collectMeshes.collidableMeshes.length;++i)
	{
		if(this.collectMeshes.collidableMeshes[i].name=="plane")
		{
			this.collectMeshes.collidableMeshes[i].dispose();
			this.collectMeshes.collidableMeshes.splice(i, 1);
			--i;
		}
		
	}
	
	for(var i=0;i<this.collectMeshes.roomWallMeshes.length;++i)
	{
		this.collectMeshes.roomWallMeshes[i].dispose();
	}
};

Layer3D.prototype.initialize = function ()
{	
	this.scene3D.createScene();
	
	this.materials = new Material(this);
	this.materials.initialize();
	
	this.decorate3D = new decorate3D(this);
	this.decorate3D.addSkybox();
	this.decorate3D.addGround();
	
	this.modelLoader = new ModelLoader(this);
	
	this.action3D = new Action3D(this);
	this.action3D.active();
};