hyzboy
8a99a331c0
这一分支结束，下一分支基于03_auto_instance范例开发WorldManager用于全局World管理，直接由World提供RenderList/SceneRoot等。
146 lines
3.8 KiB
C++
146 lines
3.8 KiB
C++
// 该范例主要演示使用一个材质下的不同材质实例传递颜色参数绘制三角形，并依赖RenderList中的自动合并功能，让同一材质下所有不同材质实例的对象一次渲染完成。
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#include<hgl/WorkManager.h>
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#include<hgl/math/Math.h>
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#include<hgl/filesystem/FileSystem.h>
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#include<hgl/graph/mtl/Material2DCreateConfig.h>
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#include<hgl/color/Color.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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constexpr float position_data[VERTEX_COUNT*2]=
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{
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0.0, 0.0,
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-0.1, 0.9,
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0.1, 0.9
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};
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constexpr uint DRAW_OBJECT_COUNT=12;
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constexpr double TRI_ROTATE_ANGLE=360.0f/DRAW_OBJECT_COUNT;
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#define USE_MATERIAL_FILE true //是否使用材质文件
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class TestApp:public WorkObject
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{
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Color4f clear_color =Color4f(0.2f,0.2f,0.2f,1.0f);
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private:
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AutoDelete<RenderList> render_list =nullptr;
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SceneNode render_root;
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Material * material =nullptr;
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struct
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{
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MaterialInstance * mi;
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Mesh * mesh;
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}render_obj[DRAW_OBJECT_COUNT]{};
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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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{
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mtl::Material2DCreateConfig cfg(PrimitiveType::Triangles,CoordinateSystem2D::NDC,mtl::WithLocalToWorld::With);
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#ifndef USE_MATERIAL_FILE
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AutoDelete<mtl::MaterialCreateInfo> mci=mtl::CreatePureColor2D(&cfg); //走程序内置材质创建函数
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material=db->CreateMaterial(mci);
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#else
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material=db->LoadMaterial("Std2D/PureColor2D",&cfg); //走材质文件加载
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#endif//USE_MATERIAL_FILE
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if(!material)
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return(false);
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for(uint i=0;i<DRAW_OBJECT_COUNT;i++)
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{
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render_obj[i].mi=db->CreateMaterialInstance(material);
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if(!render_obj[i].mi)
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return(false);
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Color4f color=GetColor4f((COLOR)(i+int(COLOR::Blue)),1.0);
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render_obj[i].mi->WriteMIData(color); //设置MaterialInstance的数据
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}
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}
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pipeline=CreatePipeline(material,InlinePipeline::Solid2D,PrimitiveType::Triangles);
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return pipeline;
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}
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bool InitVBOAndRenderList()
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{
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Primitive *prim=CreatePrimitive("Triangle",VERTEX_COUNT,material->GetDefaultVIL(),
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{{VAN::Position, VF_V2F, position_data}});
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if(!prim)
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return(false);
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db->Add(prim);
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Matrix4f mat;
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for(uint i=0;i<DRAW_OBJECT_COUNT;i++)
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{
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render_obj[i].mesh=db->CreateMesh(prim,render_obj[i].mi,pipeline);
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if(!render_obj[i].mesh)
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return(false);
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mat=rotate(deg2rad<double>(TRI_ROTATE_ANGLE*i),AxisVector::Z);
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render_root.Add(new SceneNode(mat,render_obj[i].mesh));
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}
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render_root.RefreshMatrix();
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render_list->Expend(&render_root);
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return(true);
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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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render_list=GetRenderFramework()->CreateRenderList();
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if(!render_list)
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return(false);
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if(!InitMaterial())
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return(false);
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if(!InitVBOAndRenderList())
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return(false);
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return(true);
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}
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void Render(double delta_time,graph::RenderCmdBuffer *cmd)override
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{
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cmd->SetClearColor(0,clear_color);
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cmd->BeginRenderPass();
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render_list->Render(cmd);
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cmd->EndRenderPass();
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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("AutoInstance"),1024,1024);
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}
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