[WIP] preparing SceneManager

inc/hgl/graph/SceneManager.h

@@ -0,0 +1,46 @@
+#pragma once
+#include<hgl/graph/SceneNode.h>
+
+namespace hgl
+{
+    namespace graph
+    {
+        template<typename T> class ObjectAllocator
+        {
+
+        template<typename OBJECT,typename ID,typename NAME> class IDNameObjectMap
+        {
+            ObjectList<OBJECT> obj_list;
+
+            Map<ID,OBJECT *> obj_map_by_id;
+            Map<NAME,OBJECT *> obj_map_by_name;
+
+        public:
+
+            virtual ~IDNameObjectMap()=default;
+        };//class NodeManager;
+
+        /**
+        * 场景管理器<Br>
+        * 管理一个场景中的所有资源与场景节点
+        */
+        class SceneManager
+        {
+            SceneNode *root_node;
+
+
+
+        public:
+
+                  SceneNode *GetSceneRoot()     {return root_node;}
+            const SceneNode *GetSceneRoot()const{return root_node;}
+
+            const uint GetNodeCount()const { return node_list.GetCount(); }
+
+        public:
+
+
+
+        };//class SceneManager
+    }//namespace graph
+}//namespace hgl