Function ExtractBakePoints

BakingLab/MeshBaker.cpp:804–1044

Computes lightmap sample points and gutter texels

// Computes lightmap sample points and gutter texels
static void ExtractBakePoints(const BakeInputData& bakeInput, std::vector<BakePoint>& bakePoints,
                              std::vector<GutterTexel>& gutterTexels)
{
    const uint32 LightMapSize = AppSettings::LightMapResolution;
    const uint64 NumTexels = LightMapSize * LightMapSize;

    bakePoints.clear();
    bakePoints.resize(NumTexels);
    gutterTexels.clear();

    Timer timer;
    PrintString("Extracting light map sample points...");

    ID3D11Device* device = bakeInput.Device;
    ID3D11DeviceContextPtr context;
    device->GetImmediateContext(&context);

    // Rasterize the mesh to the lightmap in UV space
    const uint32 NumTargets = 5;
    const DXGI_FORMAT RTFormats[NumTargets] =
    {
        DXGI_FORMAT_R32G32B32A32_FLOAT,
        DXGI_FORMAT_R32G32B32A32_FLOAT,
        DXGI_FORMAT_R32G32B32A32_FLOAT,
        DXGI_FORMAT_R32G32B32A32_FLOAT,
        DXGI_FORMAT_R32_UINT,
    };

    RenderTarget2D targets[NumTargets];
    RenderTarget2D msaaTargets[NumTargets];
    for(uint64 i = 0; i < NumTargets; ++i)
    {
        targets[i].Initialize(bakeInput.Device, LightMapSize, LightMapSize, RTFormats[i]);
        msaaTargets[i].Initialize(bakeInput.Device, LightMapSize, LightMapSize, RTFormats[i], 1, 8, 0);
    }

    ID3D11RenderTargetView* rtViews[NumTargets];
    for(uint64 i = 0; i < NumTargets; ++i)
        rtViews[i] = msaaTargets[i].RTView;

    context->OMSetRenderTargets(NumTargets, rtViews, nullptr);

    float clearColor[4] = { 0.0f, 0.0f, 0.0f, 0.0f };
    for(uint64 i = 0; i < NumTargets; ++i)
        context->ClearRenderTargetView(rtViews[i], clearColor);

    VertexShaderPtr vs = CompileVSFromFile(device, L"LightMapRasterization.hlsl");
    PixelShaderPtr ps = CompilePSFromFile(device, L"LightMapRasterization.hlsl");

    context->VSSetShader(vs, nullptr, 0);
    context->GSSetShader(nullptr, nullptr, 0);
    context->PSSetShader(ps, nullptr, 0);
    context->HSSetShader(nullptr, nullptr, 0);
    context->DSSetShader(nullptr, nullptr, 0);

    RasterizerStates rasterizerStates;
    rasterizerStates.Initialize(device);
    context->RSSetState(rasterizerStates.NoCull());