diff --git a/example/Vulkan/FlatColor.vert b/example/Vulkan/FlatColor.vert
index e6365cfa..2367742d 100644
--- a/example/Vulkan/FlatColor.vert
+++ b/example/Vulkan/FlatColor.vert
@@ -3,11 +3,16 @@
 layout(location = 0) in vec2 Vertex;
 layout(location = 1) in vec3 Color;
 
+layout (binding = 0) uniform UBO 
+{
+	mat4 MVP;
+} ubo;
+
 layout(location = 0) out vec4 FragmentColor;
 
 void main()
 {
     FragmentColor=vec4(Color,1.0);
 
-    gl_Position=vec4(Vertex,0.0,1.0);
+    gl_Position=vec4(Vertex,0.0,1.0)*ubo.MVP;
 }
diff --git a/example/Vulkan/VKBuffer.h b/example/Vulkan/VKBuffer.h
index 6a4900d7..23b29f87 100644
--- a/example/Vulkan/VKBuffer.h
+++ b/example/Vulkan/VKBuffer.h
@@ -33,7 +33,9 @@ public:
 
     virtual ~Buffer();
 
-    VkBuffer GetBuffer(){return buf.buffer;}
+    operator VkBuffer                   (){return buf.buffer;}
+    operator VkDeviceMemory             (){return buf.memory;}
+    operator VkDescriptorBufferInfo *   (){return &buf.info;}
 
     virtual uint8_t *Map(uint32_t start=0,uint32_t size=0);
     void Unmap();
diff --git a/example/Vulkan/VKDescriptorSets.cpp b/example/Vulkan/VKDescriptorSets.cpp
index 20cab003..e009ccd8 100644
--- a/example/Vulkan/VKDescriptorSets.cpp
+++ b/example/Vulkan/VKDescriptorSets.cpp
@@ -2,55 +2,66 @@
 #include"VKDevice.h"
 
 VK_NAMESPACE_BEGIN
-DescriptorSets::~DescriptorSets()
+namespace
 {
-    // 这里注释掉是因为从来不见那里的范便有FREE过，但又有vkFreeDescriptorSets这个函数。如发现此注释，请使用工具查是否有资源泄露
+    void DestroyDescriptorSetLayout(VkDevice device,List<VkDescriptorSetLayout> &dsl_list)
     {
-        //const int count=desc_sets.GetCount();
+        const int count=dsl_list.GetCount();
 
-        //if(count>0)
-        //    vkFreeDescriptorSets(device->GetDevice(),device->GetDescriptorPool(),count,desc_sets.GetData());
+        if(count>0)
+        {
+            VkDescriptorSetLayout *dsl=dsl_list.GetData();
+
+            for(int i=0;i<count;i++)
+            {
+                vkDestroyDescriptorSetLayout(device,*dsl,nullptr);
+                ++dsl;
+            }
+
+            dsl_list.Clear();
+        }
     }
-}
+}//namespace
 
 DescriptorSetLayout::~DescriptorSetLayout()
 {
-    const int count=desc_set_layout_list.GetCount();
+    // 这里注释掉是因为从来不见那里的范例有FREE过，但又有vkFreeDescriptorSets这个函数。如发现此注释，请使用工具查是否有资源泄露
+    //{
+    //const int count=desc_sets.GetCount();
 
-    if(count>0)
-    {
-        VkDescriptorSetLayout *dsl=desc_set_layout_list.GetData();
+    //if(count>0)
+    //    vkFreeDescriptorSets(device->GetDevice(),device->GetDescriptorPool(),count,desc_sets.GetData());
+    //}
 
-        for(int i=0;i<count;i++)
-        {
-            vkDestroyDescriptorSetLayout(device->GetDevice(),*dsl,nullptr);
-            ++dsl;
-        }
-    }
+    DestroyDescriptorSetLayout(*device,desc_set_layout_list);
 }
 
-DescriptorSets *DescriptorSetLayout::CreateSets()const
+bool DescriptorSetLayout::UpdateBuffer(const uint32_t binding,const VkDescriptorBufferInfo *buf_info)
 {
-    const int count=desc_set_layout_list.GetCount();
+    int index;
+    
+    if(!binding_index.Get(binding,index))
+        return(false);
 
-    if(count<=0)
-        return(nullptr);
+    VkDescriptorSet set;
+    if(!desc_sets.Get(index,set))
+        return(false);
+    // Update the descriptor set determining the shader binding points
+    // For every binding point used in a shader there needs to be one
+    // descriptor set matching that binding point
 
-    VkDescriptorSetAllocateInfo alloc_info[1];
-    alloc_info[0].sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO;
-    alloc_info[0].pNext = nullptr;
-    alloc_info[0].descriptorPool = device->GetDescriptorPool();
-    alloc_info[0].descriptorSetCount = count;
-    alloc_info[0].pSetLayouts = desc_set_layout_list.GetData();
+    VkWriteDescriptorSet writeDescriptorSet = {};
 
-    List<VkDescriptorSet> desc_set;
+    // Binding 0 : Uniform buffer
+    writeDescriptorSet.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;    
+    writeDescriptorSet.dstSet = set;
+    writeDescriptorSet.descriptorCount = 1;
+    writeDescriptorSet.descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
+    writeDescriptorSet.pBufferInfo = buf_info;
+    writeDescriptorSet.dstBinding = binding;
 
-    desc_set.SetCount(count);
-
-    if(vkAllocateDescriptorSets(device->GetDevice(), alloc_info, desc_set.GetData())!=VK_SUCCESS)
-        return(nullptr);
-
-    return(new DescriptorSets(device,desc_set));
+    vkUpdateDescriptorSets(device->GetDevice(), 1, &writeDescriptorSet, 0, nullptr);
+    return(true);
 }
 
 void DescriptorSetLayoutCreater::Bind(const uint32_t binding,VkDescriptorType desc_type,VkShaderStageFlagBits stageFlags)
@@ -62,7 +73,9 @@ void DescriptorSetLayoutCreater::Bind(const uint32_t binding,VkDescriptorType de
     layout_binding.stageFlags = stageFlags;
     layout_binding.pImmutableSamplers = nullptr;
 
-    layout_binding_list.Add(layout_binding);
+    const int index=layout_binding_list.Add(layout_binding);
+    
+    binding_index.Add(binding,index);
 }
 
 DescriptorSetLayout *DescriptorSetLayoutCreater::Create()
@@ -84,6 +97,23 @@ DescriptorSetLayout *DescriptorSetLayoutCreater::Create()
     if(vkCreateDescriptorSetLayout(device->GetDevice(),&descriptor_layout, nullptr, dsl_list.GetData())!=VK_SUCCESS)
         return(nullptr);
 
-    return(new DescriptorSetLayout(device,dsl_list));
+    VkDescriptorSetAllocateInfo alloc_info;
+    alloc_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO;
+    alloc_info.pNext = nullptr;
+    alloc_info.descriptorPool = device->GetDescriptorPool();
+    alloc_info.descriptorSetCount = count;
+    alloc_info.pSetLayouts = dsl_list.GetData();
+
+    List<VkDescriptorSet> desc_set;
+
+    desc_set.SetCount(count);
+
+    if(vkAllocateDescriptorSets(device->GetDevice(), &alloc_info, desc_set.GetData())!=VK_SUCCESS)
+    {
+        DestroyDescriptorSetLayout(*device,dsl_list);
+        return(nullptr);
+    }
+
+    return(new DescriptorSetLayout(device,dsl_list,desc_set,binding_index));
 }
 VK_NAMESPACE_END
diff --git a/example/Vulkan/VKDescriptorSets.h b/example/Vulkan/VKDescriptorSets.h
index f9f8c8e1..b4d8e363 100644
--- a/example/Vulkan/VKDescriptorSets.h
+++ b/example/Vulkan/VKDescriptorSets.h
@@ -2,41 +2,37 @@
 #define HGL_GRAPH_VULKAN_DESCRIPTOR_SETS_LAYOUT_INCLUDE
 
 #include"VK.h"
+#include<hgl/type/Map.h>
 VK_NAMESPACE_BEGIN
 class Device;
-class DescriptorSets
-{
-    Device *device;
-    List<VkDescriptorSet> desc_sets;
-
-public:
-
-    DescriptorSets(Device *dev,List<VkDescriptorSet> &ds):device(dev),desc_sets(ds){}
-    ~DescriptorSets();
-
-    const uint32_t          GetCount()const{return desc_sets.GetCount();}
-    const VkDescriptorSet * GetData()const{return desc_sets.GetData();}
-};//class DescriptorSets
 
 class DescriptorSetLayout
 {
     Device *device;
     List<VkDescriptorSetLayout> desc_set_layout_list;
+    List<VkDescriptorSet> desc_sets;
+
+    Map<uint32_t,int> binding_index;
 
 public:
 
-    DescriptorSetLayout(Device *dev,const List<VkDescriptorSetLayout> &dsl_list)
+    DescriptorSetLayout(Device *dev,const List<VkDescriptorSetLayout> &dsl_list,List<VkDescriptorSet> &ds_list,
+                        Map<uint32_t,int> &bi)
     {
         device=dev;
         desc_set_layout_list=dsl_list;
+        desc_sets=ds_list;
+        binding_index=bi;
     }
 
     ~DescriptorSetLayout();
 
-    const uint32_t                  GetCount()const{return desc_set_layout_list.GetCount();}
-    const VkDescriptorSetLayout *   GetData ()const{return desc_set_layout_list.GetData();}
+    const uint32_t                  GetCount    ()const{return desc_set_layout_list.GetCount();}
+    const VkDescriptorSetLayout *   GetLayouts  ()const{return desc_set_layout_list.GetData();}
 
-    DescriptorSets *CreateSets()const;
+    const List<VkDescriptorSet> &   GetSets     ()const{return desc_sets;}
+
+    bool UpdateBuffer(const uint32_t binding,const VkDescriptorBufferInfo *buf_info);
 };//class DescriptorSetLayout
 
 /**
@@ -49,6 +45,8 @@ class DescriptorSetLayoutCreater
 
     List<VkDescriptorSetLayoutBinding> layout_binding_list;
 
+    Map<uint32_t,int> binding_index;
+
 public:
 
     DescriptorSetLayoutCreater(Device *dev):device(dev){}
diff --git a/example/Vulkan/VKInstance.cpp b/example/Vulkan/VKInstance.cpp
index 918c38b7..03e61bf8 100644
--- a/example/Vulkan/VKInstance.cpp
+++ b/example/Vulkan/VKInstance.cpp
@@ -133,7 +133,7 @@ Instance *CreateInstance(const UTF8String &app_name)
         "VK_LAYER_LUNARG_standard_validation",
         "VK_LAYER_LUNARG_parameter_validation",
 //        "VK_LAYER_LUNARG_vktrace",
-//        "VK_LAYER_RENDERDOC_Capture",
+        "VK_LAYER_RENDERDOC_Capture",
 
 //        "VK_LAYER_KHRONOS_validation",
 
diff --git a/example/Vulkan/VKPipelineLayout.cpp b/example/Vulkan/VKPipelineLayout.cpp
index 524390bf..2bd1d0cd 100644
--- a/example/Vulkan/VKPipelineLayout.cpp
+++ b/example/Vulkan/VKPipelineLayout.cpp
@@ -11,7 +11,7 @@ PipelineLayout::~PipelineLayout()
 PipelineLayout *CreatePipelineLayout(VkDevice dev,const DescriptorSetLayout *dsl)
 {
     const uint32_t layout_count=(dsl?dsl->GetCount():0);
-    const VkDescriptorSetLayout *layouts=(layout_count>0?dsl->GetData():nullptr);
+    const VkDescriptorSetLayout *layouts=(layout_count>0?dsl->GetLayouts():nullptr);
 
     VkPipelineLayoutCreateInfo pPipelineLayoutCreateInfo = {};
     pPipelineLayoutCreateInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO;
@@ -26,8 +26,6 @@ PipelineLayout *CreatePipelineLayout(VkDevice dev,const DescriptorSetLayout *dsl
     if(vkCreatePipelineLayout(dev, &pPipelineLayoutCreateInfo, nullptr, &pipeline_layout)!=VK_SUCCESS)
         return(nullptr);
 
-    DescriptorSets *desc_sets=(layout_count>0?dsl->CreateSets():nullptr);
-
-    return(new PipelineLayout(dev,pipeline_layout,desc_sets));
+    return(new PipelineLayout(dev,pipeline_layout,dsl->GetSets()));
 }
 VK_NAMESPACE_END
diff --git a/example/Vulkan/VKPipelineLayout.h b/example/Vulkan/VKPipelineLayout.h
index 785a415f..5057cde2 100644
--- a/example/Vulkan/VKPipelineLayout.h
+++ b/example/Vulkan/VKPipelineLayout.h
@@ -9,13 +9,13 @@ class PipelineLayout
     VkDevice device;
     VkPipelineLayout layout;
 
-    const DescriptorSets *desc_sets;
+    List<VkDescriptorSet> desc_sets;
 
 private:
 
     friend PipelineLayout *CreatePipelineLayout(VkDevice dev,const DescriptorSetLayout *dsl);
 
-    PipelineLayout(VkDevice dev,VkPipelineLayout pl,const DescriptorSets *ds){device=dev;layout=pl;desc_sets=ds;}
+    PipelineLayout(VkDevice dev,VkPipelineLayout pl,const List<VkDescriptorSet> &ds){device=dev;layout=pl;desc_sets=ds;}
 
 public:
 
@@ -23,8 +23,8 @@ public:
 
     operator VkPipelineLayout (){return layout;}
 
-    const uint32_t          GetDescriptorSetCount   ()const{return desc_sets?desc_sets->GetCount():0;}
-    const VkDescriptorSet * GetDescriptorSets       ()const{return desc_sets?desc_sets->GetData():nullptr;}
+    const uint32_t          GetDescriptorSetCount   ()const{return desc_sets.GetCount();}
+    const VkDescriptorSet * GetDescriptorSets       ()const{return desc_sets.GetData();}
 };//class PipelineLayout
 
 PipelineLayout *CreatePipelineLayout(VkDevice dev,const DescriptorSetLayout *dsl);
diff --git a/example/Vulkan/VKVertexInput.cpp b/example/Vulkan/VKVertexInput.cpp
index 5f50aa15..495a6df7 100644
--- a/example/Vulkan/VKVertexInput.cpp
+++ b/example/Vulkan/VKVertexInput.cpp
@@ -22,7 +22,7 @@ bool VertexInput::Add(uint32_t location,VertexBuffer *buf,bool instance,VkDevice
     attrib.offset=offset;
 
     vib_list.Add(new VertexInputBuffer(binding,attrib,buf));
-    buf_list.Add(buf->GetBuffer());
+    buf_list.Add(*buf);
     buf_offset.Add(offset);
 
     binding_list.Add(binding);
diff --git a/example/Vulkan/main.cpp b/example/Vulkan/main.cpp
index 470cd426..c991b8c7 100644
--- a/example/Vulkan/main.cpp
+++ b/example/Vulkan/main.cpp
@@ -14,6 +14,7 @@
 #include"VKSemaphore.h"
 #include"VKFormat.h"
 #include"VKFramebuffer.h"
+#include<hgl/math/Math.h>
 
 #include<fstream>
 #ifdef WIN32
@@ -24,9 +25,17 @@
 using namespace hgl;
 using namespace hgl::graph;
 
+constexpr uint32_t SCREEN_WIDTH=1280;
+constexpr uint32_t SCREEN_HEIGHT=720;
+
 VkShaderModule vs=nullptr;
 VkShaderModule fs=nullptr;
 
+struct
+{
+    Matrix4f mvp;    
+}ubo_vs;
+
 char *LoadFile(const char *filename,uint32_t &file_length)
 {
     std::ifstream fs;
@@ -74,7 +83,33 @@ vulkan::Shader *LoadShader(VkDevice device)
     return(nullptr);
 }
 
-constexpr float vertex_data[]={0.0f,0.5f,   -0.5f,-0.5f,    0.5f,-0.5f };
+vulkan::Buffer *CreateUBO(vulkan::Device *dev,vulkan::Shader *shader)
+{
+    {
+        const VkExtent2D extent=dev->GetExtent();
+
+        ubo_vs.mvp=ortho2d(extent.width,extent.height);
+    }
+
+    vulkan::Buffer *ubo=dev->CreateUBO(sizeof(ubo_vs));
+
+    uint8_t *p=ubo->Map();
+
+    if(p)
+    {
+        memcpy(p,&ubo_vs,sizeof(ubo_vs));
+        ubo->Unmap();
+    }
+
+    return ubo;
+}
+
+constexpr float vertex_data[]=
+{
+    SCREEN_WIDTH/2,SCREEN_HEIGHT/4,
+    SCREEN_WIDTH*3/4,SCREEN_HEIGHT*3/4,
+    SCREEN_WIDTH/4,SCREEN_HEIGHT*3/4
+};
 constexpr float color_data[]={1,0,0,    0,1,0,      0,0,1   };
 
 vulkan::VertexBuffer *vertex_buffer=nullptr;
@@ -131,7 +166,7 @@ int main(int,char **)
 
     Window *win=CreateRenderWindow(OS_TEXT("VulkanTest"));
 
-    win->Create(1280,720);
+    win->Create(SCREEN_WIDTH,SCREEN_HEIGHT);
 
     vulkan::Instance *inst=vulkan::CreateInstance(U8_TEXT("VulkanTest"));
 
@@ -156,21 +191,13 @@ int main(int,char **)
         std::cout<<"auto select physical device: "<<render_device->GetDeviceName()<<std::endl;
     }
 
-    //vulkan::Buffer *ubo=device->CreateUBO(1024);
-
-    //uint8_t *p=ubo->Map();
-
-    //if(p)
-    //{
-    //    memset(p,0,1024);
-    //    ubo->Unmap();
-    //}
-
     vulkan::Shader *shader=LoadShader(device->GetDevice());
 
     if(!shader)
         return -3;
 
+    vulkan::Buffer *ubo=CreateUBO(device,shader);
+
     vulkan::Semaphore *sem=device->CreateSem();
 
     vulkan::VertexInput *vi=CreateVertexBuffer(device);
@@ -178,7 +205,13 @@ int main(int,char **)
     vulkan::PipelineCreater pc(device);
 
     vulkan::DescriptorSetLayoutCreater dslc(device);
+
+    dslc.BindUBO(0,VK_SHADER_STAGE_VERTEX_BIT);
+
     vulkan::DescriptorSetLayout *dsl=dslc.Create();
+
+    dsl->UpdateBuffer(0,*ubo);
+
     vulkan::PipelineLayout *pl=CreatePipelineLayout(*device,dsl);
 
     pc.Set(shader);
@@ -219,7 +252,7 @@ int main(int,char **)
     delete sem;
 
     delete vi;
-//    delete ubo;
+    delete ubo;
 
     delete shader;