diff --git a/example/Basic/auto_merge_material_instance.cpp b/example/Basic/auto_merge_material_instance.cpp
index e2624b36..b1989f07 100644
--- a/example/Basic/auto_merge_material_instance.cpp
+++ b/example/Basic/auto_merge_material_instance.cpp
@@ -19,6 +19,7 @@ constexpr float position_data[VERTEX_COUNT*2]=
 };
 
 constexpr uint DRAW_OBJECT_COUNT=12;
+constexpr double TRI_ROTATE_ANGLE=360.0f/DRAW_OBJECT_COUNT;
 
 #define USE_MATERIAL_FILE   true        //是否使用材质文件
 
@@ -99,7 +100,7 @@ private:
             if(!render_obj[i].r)
                 return(false);
 
-            mat=rotate(deg2rad<double>(double(360/DRAW_OBJECT_COUNT*i)),AxisVector::Z);
+            mat=rotate(deg2rad<double>(TRI_ROTATE_ANGLE*i),AxisVector::Z);
 
             render_root.Add(new SceneNode(mat,render_obj[i].r));
         }
diff --git a/src/Work/WorkObject.cpp b/src/Work/WorkObject.cpp
index 422700d5..4792d4ab 100644
--- a/src/Work/WorkObject.cpp
+++ b/src/Work/WorkObject.cpp
@@ -5,8 +5,6 @@
 #include<hgl/graph/VKRenderTarget.h>
 #include<hgl/graph/VKMaterialInstance.h>
 #include<hgl/graph/PrimitiveCreater.h>
-#include<hgl/graph/VKRenderResource.h>
-#include<hgl/graph/PrimitiveCreater.h>
 #include<hgl/Time.h>
 //#include<iostream>
 
@@ -92,7 +90,12 @@ namespace hgl
             }
         }
 
-        return pc->Create();
+        auto *prim=pc->Create();
+
+        if(prim)
+            db->Add(prim);
+
+        return prim;
     }
 
     graph::Renderable *WorkObject::CreateRenderable( const AnsiString &name,
@@ -101,22 +104,11 @@ namespace hgl
                                                      graph::Pipeline *pipeline,
                                                      const std::initializer_list<graph::VertexAttribDataPtr> &vad_list)
     {
-        auto *pc=new graph::PrimitiveCreater(GetDevice(),mi->GetVIL());
+        auto *prim=this->CreatePrimitive(name,vertices_count,mi->GetVIL(),vad_list);
 
-        pc->Init(name,vertices_count);
+        if(!prim)
+            return(nullptr);
 
-        for(const auto &vad:vad_list)
-        {
-            if(!pc->WriteVAB(vad.name,vad.format,vad.data))
-            {
-                delete pc;
-                return(nullptr);
-            }
-        }
-
-        auto *result=db->CreateRenderable(pc,mi,pipeline);
-
-        delete pc;
-        return result;
+        return db->CreateRenderable(prim,mi,pipeline);
     }
 }//namespcae hgl