//--------------------------------------------------------------------------------------------------------------------------------------------------- // Render shadows //--------------------------------------------------------------------------------------------------------------------------------------------------- void RenderPackedShadows(ScriptableRenderContext loop, CullResults cullResults, ref ShadowOutput packedShadows) { var setRenderTargetCommandBuffer = new CommandBuffer(); setRenderTargetCommandBuffer.name = "Render packed shadows"; setRenderTargetCommandBuffer.GetTemporaryRT(m_ShadowTexName, m_Settings.shadowAtlasWidth, m_Settings.shadowAtlasHeight, k_DepthBuffer, FilterMode.Bilinear, RenderTextureFormat.Shadowmap, RenderTextureReadWrite.Linear); setRenderTargetCommandBuffer.SetRenderTarget(new RenderTargetIdentifier(m_ShadowTexName)); setRenderTargetCommandBuffer.ClearRenderTarget(true, true, Color.green); loop.ExecuteCommandBuffer(setRenderTargetCommandBuffer); setRenderTargetCommandBuffer.Dispose(); VisibleLight[] visibleLights = cullResults.visibleLights; var shadowSlices = packedShadows.shadowSlices; // Render each light's shadow buffer into a subrect of the shared depth texture for (int lightIndex = 0; lightIndex < packedShadows.shadowLights.Length; lightIndex++) { int shadowSliceCount = packedShadows.shadowLights[lightIndex].shadowSliceCount; if (shadowSliceCount == 0) { continue; } Profiler.BeginSample("Shadows.GetShadowCasterBounds"); Bounds bounds; if (!cullResults.GetShadowCasterBounds(lightIndex, out bounds)) { Profiler.EndSample(); continue; } Profiler.EndSample(); Profiler.BeginSample("Shadows.DrawShadows"); Matrix4x4 proj; Matrix4x4 view; var lightType = visibleLights[lightIndex].lightType; var lightDirection = visibleLights[lightIndex].light.transform.forward; int shadowSliceIndex = packedShadows.GetShadowSliceIndex(lightIndex, 0); if (lightType == LightType.Spot) { var settings = new DrawShadowsSettings(cullResults, lightIndex); bool needRendering = cullResults.ComputeSpotShadowMatricesAndCullingPrimitives(lightIndex, out view, out proj, out settings.splitData); SetupShadowSplitMatrices(ref packedShadows.shadowSlices[shadowSliceIndex], proj, view); if (needRendering) { RenderShadowSplit(ref shadowSlices[shadowSliceIndex], lightDirection, proj, view, ref loop, settings); } } else if (lightType == LightType.Directional) { Vector3 splitRatio = m_Settings.directionalLightCascades; for (int s = 0; s < 4; ++s) { packedShadows.directionalShadowSplitSphereSqr[s] = new Vector4(0, 0, 0, float.NegativeInfinity); } for (int s = 0; s < shadowSliceCount; ++s, shadowSliceIndex++) { var settings = new DrawShadowsSettings(cullResults, lightIndex); var shadowResolution = shadowSlices[shadowSliceIndex].shadowResolution; bool needRendering = cullResults.ComputeDirectionalShadowMatricesAndCullingPrimitives(lightIndex, s, shadowSliceCount, splitRatio, shadowResolution, m_Settings.directionalLightNearPlaneOffset, out view, out proj, out settings.splitData); packedShadows.directionalShadowSplitSphereSqr[s] = settings.splitData.cullingSphere; packedShadows.directionalShadowSplitSphereSqr[s].w *= packedShadows.directionalShadowSplitSphereSqr[s].w; SetupShadowSplitMatrices(ref shadowSlices[shadowSliceIndex], proj, view); if (needRendering) { RenderShadowSplit(ref shadowSlices[shadowSliceIndex], lightDirection, proj, view, ref loop, settings); } } } else if (lightType == LightType.Point) { for (int s = 0; s < shadowSliceCount; ++s, shadowSliceIndex++) { var settings = new DrawShadowsSettings(cullResults, lightIndex); bool needRendering = cullResults.ComputePointShadowMatricesAndCullingPrimitives(lightIndex, (CubemapFace)s, 2.0f, out view, out proj, out settings.splitData); // The view matrix for point lights flips primitives. We fix it here (by making it left-handed). view.SetRow(1, -view.GetRow(1)); SetupShadowSplitMatrices(ref shadowSlices[shadowSliceIndex], proj, view); if (needRendering) { RenderShadowSplit(ref shadowSlices[shadowSliceIndex], lightDirection, proj, view, ref loop, settings); } } } Profiler.EndSample(); } }
public bool GetShadowCasterBounds(int lightIndex, out Bounds outBounds) { return(CullResults.GetShadowCasterBounds(this.cullResults, lightIndex, out outBounds)); }