115 lines
3.3 KiB
C++
115 lines
3.3 KiB
C++
// 该范例主要演示使用2D坐系统直接绘制一个渐变色的三角形,使用UBO传递Viewport信息
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#include<hgl/WorkManager.h>
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#include<hgl/graph/VKVertexInputConfig.h>
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#include<hgl/graph/PrimitiveCreater.h>
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#include<hgl/graph/mtl/Material2DCreateConfig.h>
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using namespace hgl;
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using namespace hgl::graph;
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constexpr uint32_t VERTEX_COUNT=3;
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static float position_data_float[VERTEX_COUNT][2]=
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{
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{0.5, 0.25},
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{0.75, 0.75},
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{0.25, 0.75}
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};
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static int16 position_data[VERTEX_COUNT][2]={};
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constexpr uint8 color_data[VERTEX_COUNT*4]=
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{
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255,0,0,255,
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0,255,0,255,
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0,0,255,255
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};
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constexpr VAType POSITION_SHADER_FORMAT =VAT_IVEC2;
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constexpr VkFormat POSITION_DATA_FORMAT =VF_V2I16;
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constexpr VkFormat COLOR_DATA_FORMAT =VF_V4UN8;
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class TestApp:public WorkObject
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{
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private:
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MaterialInstance * material_instance =nullptr;
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Mesh * render_obj =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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mtl::Material2DCreateConfig cfg(PrimitiveType::Triangles,
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CoordinateSystem2D::Ortho,
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mtl::WithLocalToWorld::With);
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VILConfig vil_config;
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cfg.position_format = POSITION_SHADER_FORMAT; //这里指定shader中使用ivec2当做顶点输入格式
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// ^
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// + 这上下两种格式要配套，否则会出错
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// v
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vil_config.Add(VAN::Position, POSITION_DATA_FORMAT); //这里指定VAB中使用RG16I当做顶点数据格式
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vil_config.Add(VAN::Color, COLOR_DATA_FORMAT); //这里指定VAB中使用RGBA8UNorm当做颜色数据格式
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material_instance=CreateMaterialInstance(mtl::inline_material::VertexColor2D,&cfg,&vil_config);
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if(!material_instance)
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return(false);
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// pipeline=db->CreatePipeline(material_instance,sc_render_target,OS_TEXT("res/pipeline/solid2d"));
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pipeline=CreatePipeline(material_instance,InlinePipeline::Solid2D); //等同上一行，为Framework重载，默认使用swapchain的render target
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return pipeline;
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}
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bool InitVBO()
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{
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const auto ext=GetExtent();
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for(uint i=0;i<VERTEX_COUNT;i++)
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{
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position_data[i][0]=position_data_float[i][0]*ext.width;
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position_data[i][1]=position_data_float[i][1]*ext.height;
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}
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render_obj=CreateMesh("Triangle",VERTEX_COUNT,material_instance,pipeline,
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{
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{VAN::Position,POSITION_DATA_FORMAT,position_data},
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{VAN::Color, COLOR_DATA_FORMAT, color_data}
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});
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SceneNode *scene_root=GetSceneRoot(); ///<取得场景根节点
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scene_root->Add(new SceneNode(render_obj));
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return(render_obj);
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}
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public:
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using WorkObject::WorkObject;
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bool Init() override
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{
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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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return(true);
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}
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};//class TestApp:public WorkObject
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int os_main(int,os_char **)
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{
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return RunFramework<TestApp>(OS_TEXT("Draw triangle use UBO"));
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}
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