function ManagerSymbol2D(layer) {
	
};

//删除一段墙上所有的symbol
ManagerSymbol2D.prototype.deleteAllFromSectionWall=function(id,startIndex)
{
	if(layer.vectors[id].symbol2dsCount>0)
	{
		for(var key in layer.vectors[id].symbol2Ds)
		{
			var symbol2d=layer.vectors[id].symbol2Ds[key];
			if(symbol2d.startindex==startIndex)
			{
				layer.deleteSymbol(symbol2d.vectorid,id)
			}
		}
	}
};