增加FragCoord属性测试

example/Vulkan/indices_rect.cpp

@@ -1,5 +1,5 @@
-// 1.indices_rect
-// 该示例是0.triangle的进化，演示使用索引数据画一个矩形
+// indices_rect
+// 该示例演示使用索引数据画一个矩形，并使用了颜色材质
 
 #include"VulkanAppFramework.h"
 #include<hgl/math/Math.h>
@@ -12,6 +12,8 @@ constexpr uint32_t SCREEN_HEIGHT=128;
 
 constexpr uint32_t VERTEX_COUNT=4;
 
+static Vector4f color(1,1,0,1);
+
 constexpr float SSP=0.25;
 constexpr float SSN=1-SSP;
 
@@ -41,6 +43,7 @@ private:
     vulkan::DescriptorSets *    descriptor_sets     =nullptr;
     vulkan::Renderable *        render_obj          =nullptr;
     vulkan::Buffer *            ubo_mvp             =nullptr;
+    vulkan::Buffer *            ubo_color_material  =nullptr;
 
     vulkan::Pipeline *          pipeline            =nullptr;
 
@@ -54,6 +57,7 @@ public:
         SAFE_CLEAR(index_buffer);
         SAFE_CLEAR(vertex_buffer);
         SAFE_CLEAR(pipeline);
+        SAFE_CLEAR(ubo_color_material);
         SAFE_CLEAR(ubo_mvp);
         SAFE_CLEAR(render_obj);
         SAFE_CLEAR(descriptor_sets);
@@ -74,19 +78,38 @@ private:
         return(true);
     }
 
+    vulkan::Buffer *CreateUBO(const UTF8String &name,const VkDeviceSize size,void *data)
+    {
+        vulkan::Buffer *ubo=device->CreateUBO(size,data);
+
+        if(!ubo)
+            return(nullptr);
+
+        const int index=material->GetUBO(name);
+
+        if(index<0)
+        {
+            SAFE_CLEAR(ubo);
+            return(nullptr);
+        }
+
+        if(!descriptor_sets->BindUBO(index,ubo))
+        {
+            SAFE_CLEAR(ubo);
+            return(nullptr);
+        }
+
+        return ubo;
+    }
+
     bool InitUBO()
     {
         const VkExtent2D extent=sc_render_target->GetExtent();
 
         wm.ortho=ortho(extent.width,extent.height);
 
-        ubo_mvp=device->CreateUBO(sizeof(WorldMatrix),&wm);
-
-        if(!ubo_mvp)
-            return(false);
-
-        if(!descriptor_sets->BindUBO(material->GetUBO("world"),ubo_mvp))
-            return(false);
+        ubo_mvp             =CreateUBO("world",         sizeof(WorldMatrix),&wm);
+        ubo_color_material  =CreateUBO("color_material",sizeof(Vector4f),&color);
 
         descriptor_sets->Update();
         return(true);