Added UpdateMaterialInstance method. but no any test.

inc/hgl/graph/MaterialRenderList.h

@@ -96,5 +96,6 @@ public:
     void Render(RenderCmdBuffer *);
 
     void UpdateLocalToWorld();          //刷新所有对象的LocalToWorld矩阵
+    void UpdateMaterialInstance(SceneNode *);
 };//class MaterialRenderList
 VK_NAMESPACE_END

inc/hgl/graph/RenderList.h

@@ -40,6 +40,7 @@ namespace hgl
             virtual bool Render(RenderCmdBuffer *);                                 ///<渲染所有对象
 
             virtual void UpdateLocalToWorld();                                      ///<更新所有对象的变换数据
+            virtual void UpdateMaterialInstance(SceneNode *);                       ///<有对象互换了材质实例
 
             virtual void Clear();                                                   ///<彻底清理
         };//class RenderList

inc/hgl/graph/RenderNode.h

@@ -13,13 +13,15 @@ namespace hgl
 
         struct RenderNode
         {
-            SceneNode *scene_node;
+            uint        index;                              ///<在MaterialRenderList中的索引
 
-            uint32 l2w_version;
-            uint32 l2w_index;
+            SceneNode * scene_node;
 
-            Vector3f world_position;
-            float to_camera_distance;
+            uint32      l2w_version;
+            uint32      l2w_index;
+
+            Vector3f    world_position;
+            float       to_camera_distance;
         };
 
         using RenderNodeList=List<RenderNode>;

inc/hgl/graph/VKRenderable.h

@@ -103,6 +103,20 @@ public:
 
     const   PrimitiveDataBuffer *GetDataBuffer      ()const{return primitive_data_buffer;}
     const   PrimitiveRenderData *GetRenderData      ()const{return primitive_render_data;}
+
+public:
+
+            bool                ChangeMaterialInstance(MaterialInstance *mi)
+            {
+                if(!mi)
+                    return(false);
+
+                if(mi->GetMaterial()!=mat_inst->GetMaterial())      //不能换母材质
+                    return(false);
+
+                mat_inst=mi;
+                return(true);
+            }
 };//class Renderable
 
 Renderable *CreateRenderable(Primitive *,MaterialInstance *,Pipeline *);