Method RenderClusterVisualizer

BindlessDeferred/BindlessDeferred.cpp:2002–2060

Renders the 2D "overhead" visualizer that shows per-cluster light/decal counts

// Renders the 2D "overhead" visualizer that shows per-cluster light/decal counts
void BindlessDeferred::RenderClusterVisualizer()
{
    if(AppSettings::ShowClusterVisualizer == false)
        return;

    ID3D12GraphicsCommandList* cmdList = DX12::CmdList;

    PIXMarker pixMarker(cmdList, "Cluster Visualizer");

    Float2 displaySize = Float2(float(swapChain.Width()), float(swapChain.Height()));
    Float2 drawSize = displaySize * 0.375f;
    Float2 drawPos = displaySize * (0.5f + (0.5f - 0.375f) / 2.0f);

    D3D12_VIEWPORT viewport = { };
    viewport.Width = drawSize.x;
    viewport.Height = drawSize.y;
    viewport.MinDepth = 0.0f;
    viewport.MaxDepth = 1.0f;
    viewport.TopLeftX = drawPos.x;
    viewport.TopLeftY = drawPos.y;

    D3D12_RECT scissorRect = { };
    scissorRect.left = 0;
    scissorRect.top = 0;
    scissorRect.right = uint32(swapChain.Width());
    scissorRect.bottom = uint32(swapChain.Height());

    cmdList->RSSetViewports(1, &viewport);
    cmdList->RSSetScissorRects(1, &scissorRect);

    cmdList->SetGraphicsRootSignature(clusterVisRootSignature);
    cmdList->SetPipelineState(clusterVisPSO);

    Float4x4 invProjection = Float4x4::Invert(camera.ProjectionMatrix());
    Float3 farTopRight = Float3::Transform(Float3(1.0f, 1.0f, 1.0f), invProjection);
    Float3 farBottomLeft = Float3::Transform(Float3(-1.0f, -1.0f, 1.0f), invProjection);

    clusterVisConstants.Data.Projection = camera.ProjectionMatrix();
    clusterVisConstants.Data.ViewMin = Float3(farBottomLeft.x, farBottomLeft.y, camera.NearClip());
    clusterVisConstants.Data.NearClip = camera.NearClip();
    clusterVisConstants.Data.ViewMax = Float3(farTopRight.x, farTopRight.y, camera.FarClip());
    clusterVisConstants.Data.InvClipRange = 1.0f / (camera.FarClip() - camera.NearClip());
    clusterVisConstants.Data.DisplaySize = displaySize;
    clusterVisConstants.Data.NumXTiles = uint32(AppSettings::NumXTiles);
    clusterVisConstants.Data.NumXYTiles = uint32(AppSettings::NumXTiles * AppSettings::NumYTiles);
    clusterVisConstants.Upload();
    clusterVisConstants.SetAsGfxRootParameter(cmdList, 0);

    AppSettings::BindCBufferGfx(cmdList, 1);

    D3D12_CPU_DESCRIPTOR_HANDLE srvs[] = { decalClusterBuffer.SRV(), spotLightClusterBuffer.SRV() };
    DX12::BindShaderResources(cmdList, 2, ArraySize_(srvs), srvs);

    cmdList->IASetPrimitiveTopology(D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
    cmdList->IASetIndexBuffer(nullptr);
    cmdList->IASetVertexBuffers(0, 0, nullptr);

    cmdList->DrawInstanced(3, 1, 0, 0);