static void TraceVolumetricClouds_Sky_Low(CommandBuffer cmd, VolumetricCloudsSkyLowPassData passData, MaterialPropertyBlock mpb) { // Compute the number of tiles to evaluate int traceTX = (passData.traceWidth + (8 - 1)) / 8; int traceTY = (passData.traceHeight + (8 - 1)) / 8; // Bind the sampling textures BlueNoise.BindDitheredTextureSet(cmd, passData.commonData.ditheredTextureSet); // Bind the constant buffer ConstantBuffer.Push(cmd, passData.commonData.cloudsCB, passData.commonData.volumetricCloudsCS, HDShaderIDs._ShaderVariablesClouds); CoreUtils.SetKeyword(cmd, "LOCAL_VOLUMETRIC_CLOUDS", false); // Ray-march the clouds for this frame CoreUtils.SetKeyword(cmd, "PHYSICALLY_BASED_SUN", passData.commonData.cloudsCB._PhysicallyBasedSun == 1); cmd.SetComputeTextureParam(passData.commonData.volumetricCloudsCS, passData.renderKernel, HDShaderIDs._MaxZMaskTexture, passData.maxZMask); cmd.SetComputeTextureParam(passData.commonData.volumetricCloudsCS, passData.renderKernel, HDShaderIDs._Worley128RGBA, passData.commonData.worley128RGBA); cmd.SetComputeTextureParam(passData.commonData.volumetricCloudsCS, passData.renderKernel, HDShaderIDs._ErosionNoise, passData.commonData.erosionNoise); cmd.SetComputeTextureParam(passData.commonData.volumetricCloudsCS, passData.renderKernel, HDShaderIDs._CloudMapTexture, passData.commonData.cloudMapTexture); cmd.SetComputeTextureParam(passData.commonData.volumetricCloudsCS, passData.renderKernel, HDShaderIDs._CloudLutTexture, passData.commonData.cloudLutTexture); cmd.SetComputeBufferParam(passData.commonData.volumetricCloudsCS, passData.renderKernel, HDShaderIDs._VolumetricCloudsAmbientProbeBuffer, passData.ambientProbeBuffer); // Output buffers cmd.SetComputeTextureParam(passData.commonData.volumetricCloudsCS, passData.renderKernel, HDShaderIDs._CloudsLightingTextureRW, passData.intermediateLightingBuffer); cmd.SetComputeTextureParam(passData.commonData.volumetricCloudsCS, passData.renderKernel, HDShaderIDs._CloudsDepthTextureRW, passData.intermediateDepthBuffer); cmd.DispatchCompute(passData.commonData.volumetricCloudsCS, passData.renderKernel, traceTX, traceTY, 1); CoreUtils.SetKeyword(cmd, "PHYSICALLY_BASED_SUN", false); mpb.SetTexture(HDShaderIDs._VolumetricCloudsUpscaleTextureRW, passData.intermediateLightingBuffer); CoreUtils.SetRenderTarget(cmd, passData.output, ClearFlag.None, miplevel: 2, cubemapFace: passData.cubemapFace); CoreUtils.DrawFullScreen(cmd, passData.cloudCombinePass, mpb, 3); }
void PrepareVolumetricCloudsSkyLowPassData(RenderGraph renderGraph, RenderGraphBuilder builder, HDCamera hdCamera, int width, int height, Matrix4x4[] pixelCoordToViewDir, CubemapFace cubemapFace, VolumetricClouds settings, VolumetricCloudsSkyLowPassData data) { // Compute the cloud model data CloudModelData cloudModelData = GetCloudModelData(settings); // Fill the common data FillVolumetricCloudsCommonData(false, settings, TVolumetricCloudsCameraType.Sky, in cloudModelData, ref data.commonData); // We need to make sure that the allocated size of the history buffers and the dispatch size are perfectly equal. // The ideal approach would be to have a function for that returns the converted size from a viewport and texture size. // but for now we do it like this. // Final resolution at which the effect should be exported data.finalWidth = width; data.finalHeight = height; // Intermediate resolution at which the effect is accumulated data.intermediateWidth = Mathf.RoundToInt(0.5f * width); data.intermediateHeight = Mathf.RoundToInt(0.5f * height); // Resolution at which the effect is traced data.traceWidth = Mathf.RoundToInt(0.25f * width); data.traceHeight = Mathf.RoundToInt(0.25f * height); // Sky data.cubemapFace = cubemapFace; data.cloudCombinePass = m_CloudCombinePass; // Kernels data.renderKernel = m_CloudRenderKernel; data.preUpscaleKernel = m_PreUpscaleCloudsSkyKernel; data.finalUpscaleKernel = m_UpscaleAndCombineCloudsSkyKernel; data.pixelCoordToViewDir = pixelCoordToViewDir; // Update the constant buffer VolumetricCloudsCameraData cameraData; cameraData.cameraType = data.commonData.cameraType; cameraData.traceWidth = data.traceWidth; cameraData.traceHeight = data.traceHeight; cameraData.intermediateWidth = data.intermediateWidth; cameraData.intermediateHeight = data.intermediateHeight; cameraData.finalWidth = data.finalWidth; cameraData.finalHeight = data.finalHeight; cameraData.viewCount = 1; cameraData.enableExposureControl = data.commonData.enableExposureControl; cameraData.lowResolution = true; cameraData.enableIntegration = false; UpdateShaderVariableslClouds(ref data.commonData.cloudsCB, hdCamera, settings, cameraData, cloudModelData, false); int skyResolution = (int)m_Asset.currentPlatformRenderPipelineSettings.lightLoopSettings.skyReflectionSize; data.intermediateLightingBuffer = builder.CreateTransientTexture(GetVolumetricCloudsIntermediateLightingBufferDesc()); data.intermediateDepthBuffer = builder.CreateTransientTexture(GetVolumetricCloudsIntermediateDepthBufferDesc()); data.output = builder.WriteTexture(renderGraph.CreateTexture(GetVolumetricCloudsIntermediateCubeTextureDesc())); data.maxZMask = builder.ReadTexture(renderGraph.defaultResources.blackTextureXR); data.ambientProbeBuffer = builder.ReadComputeBuffer(renderGraph.ImportComputeBuffer(m_CloudsProbeBuffer)); }