/// <summary>
/// 将一个TilePoint，散列成一个唯一的索引值，用于在Dictionary快速定位一个MapTile格子
/// </summary>
/// <param name="point"></param>
/// <returns></returns>
public static int Hash(TilePoint point)
{
return(SharedUtil.PointHash(point.x, point.y));
}
//返回两点之间的笛卡尔距离。
public static int DescartesDistance(TilePoint p1, TilePoint p2)
{
return(Mathf.Abs(p1.x - p2.x) + Mathf.Abs(p1.y - p2.y));
}