疑問：武器的碰撞是怎麼檢測的，武器也被視爲一個obj？I think-- IBaseObj->WBaseObj->CMoveShape->CWeapon - -
然後上設計：
IBaseObject ---- CObjFactoryMgr ----CPoorMemory
WBaseObject // you Can Fly : )
CMoveShape//可移動物體 CShape//不可移動物體
CWeapon CMonster CNpc CPlayer CSkill CMoveShapeBuild CItem CShapeBuild
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CTerrain CSkyBox CCamera CEffective