初始碰撞器检测的地图瓦片范围(也就是实际像素/瓦片大小后缩放进行碰撞),瓦片数值越小,精确度越高,但是计算时间也越长 @param tileSize
(int tileSize)
source not stored for this graph (policy: none)
nothing calls this directly
no test coverage detected