物体的移动和添加

这对于我真是一个蛋疼的问题. 首先一个地图被分成了横竖排列的RegionMonitor. Each RM(RegionMonitor) will take in charge of all objects inside this region, especially for the moving requests. for interaction between actors then can communicate directly without any business of RM. But for adding, moving, space-moving, we need RM.

RM will do:

1.