88 lines
1.9 KiB
C++
88 lines
1.9 KiB
C++
// 全屏三角形
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// 该范例用于演示使用索引画一个覆盖全屏的三角形，但是不传递任何顶点信息，顶点坐标在vertex shader中通过gl_VertexIndex计算出来。
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#include"VulkanAppFramework.h"
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#include<hgl/math/Math.h>
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using namespace hgl;
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using namespace hgl::graph;
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constexpr uint32_t SCREEN_WIDTH=256;
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constexpr uint32_t SCREEN_HEIGHT=256;
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class TestApp:public VulkanApplicationFramework
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{
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private:
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MaterialInstance * material_instance =nullptr;
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RenderableInstance *renderable_instance =nullptr;
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Pipeline * pipeline =nullptr;
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private:
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bool InitMaterial()
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{
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material_instance=db->CreateMaterialInstance(OS_TEXT("res/material/fullscreen"));
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if(!material_instance)return(false);
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BindCameraUBO(material_instance);
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pipeline=CreatePipeline(material_instance,InlinePipeline::Solid2D,Prim::Triangles);
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return pipeline;
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}
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bool InitVBO()
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{
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auto render_obj=db->CreatePrimitive(3);
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if(!render_obj)return(false);
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renderable_instance=db->CreateRenderableInstance(render_obj,material_instance,pipeline);
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return(true);
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}
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public:
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bool Init()
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{
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if(!VulkanApplicationFramework::Init(SCREEN_WIDTH,SCREEN_HEIGHT))
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return(false);
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if(!InitMaterial())
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return(false);
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if(!InitVBO())
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return(false);
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BuildCommandBuffer(renderable_instance);
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return(true);
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}
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void Resize(int w,int h)override
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{
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VulkanApplicationFramework::Resize(w,h);
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BuildCommandBuffer(renderable_instance);
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}
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};//class TestApp:public VulkanApplicationFramework
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int main(int,char **)
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{
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#ifdef _DEBUG
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if(!CheckStrideBytesByFormat())
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return 0xff;
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#endif//
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TestApp app;
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if(!app.Init())
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return(-1);
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while(app.Run());
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return 0;
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}
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