Method RenderAreaLightShadowMap

BakingLab/MeshRenderer.cpp:926–974

Renders an omni-directional shadow map for the spherical area light

// Renders an omni-directional shadow map for the spherical area light
void MeshRenderer::RenderAreaLightShadowMap(ID3D11DeviceContext* context, const Camera& camera)
{
    PIXEvent event(L"Area Light Shadow Map Rendering");

    const uint32 sMapSize = areaLightShadowMap.Width;
    const Float3 areaLightPos = Float3(AppSettings::AreaLightX, AppSettings::AreaLightY, AppSettings::AreaLightZ);
    const float nearClip = AppSettings::AreaLightSize;

    for(uint64 face = 0; face < 6; ++face)
    {
        PIXEvent faceEvent(L"Area Light Shadow Map Face " + ToString(face));

        // Set the viewport
        SetViewport(context, sMapSize, sMapSize);

        // Set the shadow map as the depth target
        ID3D11DepthStencilView* dsv = areaLightShadowMap.ArraySlices[face];
        ID3D11RenderTargetView* nullRenderTargets[D3D11_SIMULTANEOUS_RENDER_TARGET_COUNT] = { NULL };
        context->OMSetRenderTargets(D3D11_SIMULTANEOUS_RENDER_TARGET_COUNT, nullRenderTargets, dsv);
        context->ClearDepthStencilView(dsv, D3D11_CLEAR_DEPTH|D3D11_CLEAR_STENCIL, 0.0f, 0);

        PerspectiveCamera shadowCamera(1.0f, Pi_2, nearClip, nearClip + 1.0f);

        // Set up a infinite reverse projection
        Float4x4 projection;
        projection._33 = 0.0f;
        projection._43 = nearClip;
        projection._34 = 1.0f;
        projection._44 = 0.0f;
        shadowCamera.SetProjection(projection);

        static const Float3 LookAtDirs[6] =
        {
            Float3(1.0f, 0.0f, 0.0f), Float3(-1.0f, 0.0f, 0.0f),
            Float3(0.0f, 1.0f, 0.0f), Float3(0.0f, -1.0f, 0.0f),
            Float3(0.0f, 0.0f, 1.0f), Float3(0.0f, 0.0f, -1.0f)
        };

        static const Float3 UpDirs[6] = {
            Float3(0.0f, 1.0f, 0.0f),  Float3(0.0f, 1.0f, 0.0f),
            Float3(0.0f, 0.0f, -1.0f), Float3(0.0f, 0.0f, 1.0f),
            Float3(0.0f, 1.0f, 0.0f),  Float3(0.0f, 1.0f, 0.0f),
        };

        shadowCamera.SetLookAt(areaLightPos, areaLightPos + LookAtDirs[face], UpDirs[face]);

        RenderDepth(context, shadowCamera, false, true);
    }
}

// Renders the area light
void MeshRenderer::RenderAreaLight(ID3D11DeviceContext* context, const Camera& camera)