Method RenderPicking

BindlessDeferred/BindlessDeferred.cpp:1970–1999

Runs a simple compute shader that reads depth + tangent from for a particular pixel, and copies the results to a readback buffer that's used to generate the "cursor" decal

// Runs a simple compute shader that reads depth + tangent from for a particular pixel, and copies
// the results to a readback buffer that's used to generate the "cursor" decal
void BindlessDeferred::RenderPicking()
{
    if(currMouseState.IsOverWindow == false || AppSettings::EnableDecalPicker == false)
        return;

    ID3D12GraphicsCommandList* cmdList = DX12::CmdList;

    PIXMarker pixMarker(cmdList, "Picking");

    cmdList->SetPipelineState(AppSettings::MSAAMode != MSAAModes::MSAANone ? pickingPSOs[1] : pickingPSOs[0]);
    cmdList->SetComputeRootSignature(pickingRS);

    pickingConstants.Data.InverseViewProjection = Float4x4::Invert(camera.ViewProjectionMatrix());
    pickingConstants.Data.PixelPos = Uint2(currMouseState.X, currMouseState.Y);
    pickingConstants.Data.RTSize.x = float(mainTarget.Width());
    pickingConstants.Data.RTSize.y = float(mainTarget.Height());
    pickingConstants.Upload();
    pickingConstants.SetAsComputeRootParameter(cmdList, 0);

    pickingBuffer.MakeWritable(cmdList);

    D3D12_CPU_DESCRIPTOR_HANDLE descriptors[3] = { tangentFrameTarget.SRV(), depthBuffer.SRV(), pickingBuffer.UAV() };
    DX12::BindShaderResources(cmdList, 1, ArraySize_(descriptors), descriptors, CmdListMode::Compute);

    cmdList->Dispatch(1, 1, 1);

    pickingBuffer.MakeReadable(cmdList);

    cmdList->CopyResource(pickingReadbackBuffers[DX12::CurrFrameIdx].Resource, pickingBuffer.InternalBuffer.Resource);
}

// Renders the 2D "overhead" visualizer that shows per-cluster light/decal counts
void BindlessDeferred::RenderClusterVisualizer()