Class BasicTriangle

examples/basic_triangle/basic_triangle.cpp:34–107

static const char* g_WindowTitle = "Donut Example: Basic Triangle";

class BasicTriangle : public app::IRenderPass
{
private:
    nvrhi::ShaderHandle m_VertexShader;
    nvrhi::ShaderHandle m_PixelShader;
    nvrhi::GraphicsPipelineHandle m_Pipeline;
    nvrhi::CommandListHandle m_CommandList;

public:
    using IRenderPass::IRenderPass;

    bool Init()
    {
        std::filesystem::path appShaderPath = app::GetDirectoryWithExecutable() / "shaders/basic_triangle" /  app::GetShaderTypeName(GetDevice()->getGraphicsAPI());
        
        auto nativeFS = std::make_shared<vfs::NativeFileSystem>();
        engine::ShaderFactory shaderFactory(GetDevice(), nativeFS, appShaderPath);

        m_VertexShader = shaderFactory.CreateShader("shaders.hlsl", "main_vs", nullptr, nvrhi::ShaderType::Vertex);
        m_PixelShader = shaderFactory.CreateShader("shaders.hlsl", "main_ps", nullptr, nvrhi::ShaderType::Pixel);

        if (!m_VertexShader || !m_PixelShader)
        {
            return false;
        }
        
        m_CommandList = GetDevice()->createCommandList();

        return true;
    }

    void BackBufferResizing() override
    { 
        m_Pipeline = nullptr;
    }

    void Animate(float fElapsedTimeSeconds) override
    {
        GetDeviceManager()->SetInformativeWindowTitle(g_WindowTitle);
    }
    
    void Render(nvrhi::IFramebuffer* framebuffer) override
    {
        if (!m_Pipeline)
        {
            nvrhi::GraphicsPipelineDesc psoDesc;
            psoDesc.VS = m_VertexShader;
            psoDesc.PS = m_PixelShader;
            psoDesc.primType = nvrhi::PrimitiveType::TriangleList;
            psoDesc.renderState.depthStencilState.depthTestEnable = false;

            m_Pipeline = GetDevice()->createGraphicsPipeline(psoDesc, framebuffer->getFramebufferInfo());
        }

        m_CommandList->open();

        nvrhi::utils::ClearColorAttachment(m_CommandList, framebuffer, 0, nvrhi::Color(0.f));