diff --git a/inc/hgl/graph/SceneNode.h b/inc/hgl/graph/SceneNode.h
index 3524e108..adb2045b 100644
--- a/inc/hgl/graph/SceneNode.h
+++ b/inc/hgl/graph/SceneNode.h
@@ -24,12 +24,12 @@ namespace hgl
             Vector4f Center;                                                                                            ///<中心点
             Vector4f LocalCenter;                                                                                       ///<本地坐标中心点
             Vector4f WorldCenter;                                                                                       ///<世界坐标中心点
+            
+            RenderableInstance *render_obj=nullptr;                                                                     ///<可渲染实例
 
         public:
 
             ObjectList<SceneNode> SubNode;                                                                              ///<子节点
-            
-            RenderableInstance *render_obj=nullptr;                                                                     ///<可渲染实例
 
         public:
 
@@ -38,7 +38,7 @@ namespace hgl
             SceneNode(const Matrix4f &mat                           ):SceneOrient(mat)  {}
             SceneNode(const Matrix4f &mat,  RenderableInstance *ri  ):SceneOrient(mat)  {render_obj=ri;}
 
-            virtual ~SceneNode(){}
+            virtual ~SceneNode()=default;
 
             void Clear()
             {
@@ -46,6 +46,33 @@ namespace hgl
                 render_obj=nullptr;
             }
 
+            RenderableInstance *GetRI(){return render_obj;}
+            void                SetRI(RenderableInstance *);
+
+            SceneNode *CreateSubNode()
+            {
+                SceneNode *sn=new SceneNode();
+
+                SubNode.Add(sn);
+                return sn;
+            }
+
+            SceneNode *CreateSubNode(const Matrix4f &mat)
+            {
+                SceneNode *sn=new SceneNode(mat);
+
+                SubNode.Add(sn);
+                return sn;
+            }
+
+            SceneNode *CreateSubNode(const Matrix4f &mat,RenderableInstance *ri)
+            {
+                SceneNode *sn=new SceneNode(mat,ri);
+
+                SubNode.Add(sn);
+                return sn;
+            }
+
         public: //坐标相关方法
 
             virtual         void        SetBoundingBox      (const AABB &bb){BoundingBox=bb;}                           ///<设置绑定盒
diff --git a/src/SceneGraph/SceneNode.cpp b/src/SceneGraph/SceneNode.cpp
index c97563f2..f08c9785 100644
--- a/src/SceneGraph/SceneNode.cpp
+++ b/src/SceneGraph/SceneNode.cpp
@@ -1,9 +1,27 @@
 #include<hgl/graph/SceneNode.h>
 #include<hgl/graph/RenderList.h>
+#include<hgl/graph/VKRenderableInstance.h>
 namespace hgl
 {
     namespace graph
     {
+        void SceneNode::SetRI(RenderableInstance *ri)
+        {
+            render_obj=ri;
+
+            if(render_obj)
+            {
+                SetBoundingBox(render_obj->GetBoundingBox());
+            }
+            else
+            {
+                BoundingBox.minPoint=vec::zero;
+                BoundingBox.maxPoint=vec::zero;
+
+                WorldBoundingBox=LocalBoundingBox=BoundingBox;
+            }
+        }
+
         /**
         * 刷新矩阵
         * @param root_matrix 根矩阵
diff --git a/src/SceneGraph/SceneTreeToRenderList.cpp b/src/SceneGraph/SceneTreeToRenderList.cpp
index 5c31b884..adaac1bf 100644
--- a/src/SceneGraph/SceneTreeToRenderList.cpp
+++ b/src/SceneGraph/SceneTreeToRenderList.cpp
@@ -139,7 +139,9 @@ namespace hgl
         {
             if(!sn)return(false);
 
-            if(sn->render_obj)
+            RenderableInstance *ri=sn->GetRI();
+
+            if(ri)
             {
                 RenderNode *rn=new RenderNode;
 
@@ -150,7 +152,7 @@ namespace hgl
                 rn->distance_to_camera_square=length_squared(rn->WorldCenter,camera_info.pos);
 //                rn->distance_to_camera=sqrtf(rn->distance_to_camera_square);
 
-                rn->ri=sn->render_obj;
+                rn->ri=ri;
 
                 render_node_list.Add(rn);
             }