Method RenderSpotLightShadowMap

BindlessDeferred/MeshRenderer.cpp:712–750

Render shadows for all spot lights

// Render shadows for all spot lights
void MeshRenderer::RenderSpotLightShadowMap(ID3D12GraphicsCommandList* cmdList, const Camera& camera)
{
    PIXMarker marker(cmdList, L"Spot Light Shadow Map Rendering");
    CPUProfileBlock cpuProfileBlock("Spot Light Shadow Map Rendering");
    ProfileBlock profileBlock(cmdList, "Spot Light Shadow Map Rendering");

    Float4x4* shadowMatrices = spotLightShadowMatrices.Map<Float4x4>();

    spotLightShadowMap.MakeWritable(cmdList);

    const Array<ModelSpotLight>& spotLights = model->SpotLights();
    const uint64 numSpotLights = Min<uint64>(spotLights.Size(), AppSettings::MaxLightClamp);
    for(uint64 i = 0; i < numSpotLights; ++i)
    {
        PIXMarker lightMarker(cmdList, MakeString(L"Rendering Spot Light Shadow %u", i).c_str());

        // Set the viewport
        DX12::SetViewport(cmdList, SpotLightShadowMapSize, SpotLightShadowMapSize);

        // Set the shadow map as the depth target
        D3D12_CPU_DESCRIPTOR_HANDLE dsv = spotLightShadowMap.ArrayDSVs[i].CPUHandle;
        cmdList->OMSetRenderTargets(0, nullptr, false, &dsv);
        cmdList->ClearDepthStencilView(dsv, D3D12_CLEAR_FLAG_DEPTH | D3D12_CLEAR_FLAG_STENCIL, 1.0f, 0, 0, nullptr);

        const ModelSpotLight& light = spotLights[i];

        // Draw the mesh with depth only, using the new shadow camera
        PerspectiveCamera shadowCamera;
        shadowCamera.Initialize(1.0f, light.AngularAttenuation.y, 0.1f, AppSettings::SpotLightRange);
        shadowCamera.SetPosition(light.Position);
        shadowCamera.SetOrientation(light.Orientation);
        RenderSpotLightShadowDepth(cmdList, shadowCamera);

        Float4x4 shadowMatrix = shadowCamera.ViewProjectionMatrix() * ShadowScaleOffsetMatrix;
        shadowMatrices[i] = Float4x4::Transpose(shadowMatrix);
    }

    spotLightShadowMap.MakeReadable(cmdList);
}