newly material instance stat,but can't run.

inc/hgl/graph/MaterialRenderList.h

@@ -35,10 +35,11 @@ private:
         void Set(Renderable *);
     };
 
-    MaterialInstanceSets mi_set;
+    SortedSets<int> mi_id_set;
     DataArray<RenderItem> ri_array;
     uint ri_count;
 
+    void StatMI();
     void Stat();
 
 protected:

inc/hgl/graph/RenderNode.h

@@ -22,8 +22,6 @@ namespace hgl
         };
 
         using RenderNodeList=List<RenderNode>;
-
-        using MaterialInstanceSets=SortedSets<MaterialInstance *>;
     }//namespace graph
 }//namespace hgl
 #endif//HGL_GRAPH_RENDER_NODE_INCLUDE