diff --git a/example/common/VulkanAppFramework.h b/example/common/VulkanAppFramework.h
index 6111d34c..1ca00e21 100644
--- a/example/common/VulkanAppFramework.h
+++ b/example/common/VulkanAppFramework.h
@@ -225,12 +225,7 @@ public:
                 cb->BindPipeline(ri->GetPipeline());
                 cb->BindDescriptorSets(ri->GetMaterial());
                 cb->BindVBO(ri);
-
-                    if (vid->ib_access->buffer)
-                        cb->DrawIndexed(vid->ib_access->buffer->GetCount());
-                    else
-                        cb->Draw(vid->vertex_count);
-
+                cb->Draw(vid);
             cb->EndRenderPass();
         cb->End();
 
diff --git a/inc/hgl/graph/VK.h b/inc/hgl/graph/VK.h
index e628a6de..bdca499b 100644
--- a/inc/hgl/graph/VK.h
+++ b/inc/hgl/graph/VK.h
@@ -54,6 +54,8 @@ class DeviceMemory;
 class DeviceBuffer;
 struct DeviceBufferData;
 
+struct VertexInputData;
+
 class VertexAttribBuffer;
 using VAB=VertexAttribBuffer;
 
diff --git a/inc/hgl/graph/VKCommandBuffer.h b/inc/hgl/graph/VKCommandBuffer.h
index 10e20071..06cb9bb7 100644
--- a/inc/hgl/graph/VKCommandBuffer.h
+++ b/inc/hgl/graph/VKCommandBuffer.h
@@ -200,6 +200,8 @@ public: //draw
                                 void DrawIndirect       (VkBuffer buf,          uint32_t drawCount,uint32_t stride=sizeof(VkDrawIndirectCommand         )){return DrawIndirect(         buf,0,drawCount,stride);}
                                 void DrawIndexedIndirect(VkBuffer buf,          uint32_t drawCount,uint32_t stride=sizeof(VkDrawIndexedIndirectCommand  )){return DrawIndexedIndirect(  buf,0,drawCount,stride);}
 
+                                void Draw               (const VertexInputData *vid);
+
 public: //dynamic state
 };//class RenderCmdBuffer:public GPUCmdBuffer
 
diff --git a/src/SceneGraph/Vulkan/VKCommandBufferRender.cpp b/src/SceneGraph/Vulkan/VKCommandBufferRender.cpp
index 2a712a3b..f8241d7f 100644
--- a/src/SceneGraph/Vulkan/VKCommandBufferRender.cpp
+++ b/src/SceneGraph/Vulkan/VKCommandBufferRender.cpp
@@ -183,4 +183,12 @@ void RenderCmdBuffer::DrawIndexedIndirect(  VkBuffer        buffer,
     for(uint32_t i=0;i<drawCount;i++)
         vkCmdDrawIndexedIndirect(cmd_buf,buffer,offset+i*stride,1,stride);
 }
+
+void RenderCmdBuffer::Draw(const VertexInputData *vid)
+{
+    if (vid->ib_access->buffer)
+        DrawIndexed(vid->ib_access->buffer->GetCount());
+    else
+        Draw(vid->vertex_count);
+}
 VK_NAMESPACE_END