VolumetricCloudsParameters_FullResolution PrepareVolumetricCloudsParameters_FullResolution(HDCamera hdCamera, int width, int height, int viewCount, bool exposureControl, VolumetricClouds settings, TVolumetricCloudsCameraType cameraType)
{
VolumetricCloudsParameters_FullResolution parameters = new VolumetricCloudsParameters_FullResolution();
// Compute the cloud model data
CloudModelData cloudModelData = GetCloudModelData(settings);
// Fill the common data
FillVolumetricCloudsCommonData(exposureControl, settings, cameraType, in cloudModelData, ref parameters.commonData);
// If this is a baked reflection, we run everything at full res
parameters.finalWidth = width;
parameters.finalHeight = height;
parameters.viewCount = viewCount;
// MSAA support
parameters.needsTemporaryBuffer = hdCamera.msaaEnabled;
parameters.cloudCombinePass = m_CloudCombinePass;
parameters.needExtraColorBufferCopy = (GetColorBufferFormat() == GraphicsFormat.B10G11R11_UFloatPack32 &&
// On PC and Metal, but not on console.
(SystemInfo.graphicsDeviceType == GraphicsDeviceType.Direct3D11 ||
SystemInfo.graphicsDeviceType == GraphicsDeviceType.Direct3D12 ||
SystemInfo.graphicsDeviceType == GraphicsDeviceType.Metal ||
SystemInfo.graphicsDeviceType == GraphicsDeviceType.Vulkan));
// In case of MSAA, we no longer require the preliminary copy as there is no longer a need for RW of the color buffer.
parameters.needExtraColorBufferCopy &= !parameters.needsTemporaryBuffer;
// Compute shader and kernels
parameters.renderKernel = m_CloudRenderKernel;
parameters.combineKernel = parameters.needExtraColorBufferCopy ? m_CombineCloudsKernelColorCopy : m_CombineCloudsKernelColorRW;
// Update the constant buffer
VolumetricCloudsCameraData cameraData;
cameraData.cameraType = parameters.commonData.cameraType;
cameraData.traceWidth = parameters.finalWidth;
cameraData.traceHeight = parameters.finalHeight;
cameraData.intermediateWidth = parameters.finalWidth;
cameraData.intermediateHeight = parameters.finalHeight;
cameraData.finalWidth = parameters.finalWidth;
cameraData.finalHeight = parameters.finalHeight;
cameraData.viewCount = parameters.viewCount;
cameraData.enableExposureControl = parameters.commonData.enableExposureControl;
cameraData.lowResolution = false;
cameraData.enableIntegration = true;
UpdateShaderVariableslClouds(ref parameters.commonData.cloudsCB, hdCamera, settings, cameraData, cloudModelData, false);
return(parameters);
}
static void TraceVolumetricClouds_FullResolution(CommandBuffer cmd, VolumetricCloudsParameters_FullResolution parameters, ComputeBuffer ambientProbeBuffer,
RTHandle colorBuffer, RTHandle depthPyramid, RTHandle volumetricLightingTexture, RTHandle scatteringFallbackTexture, RTHandle maxZMask,
RTHandle intermediateLightingBuffer0, RTHandle intermediateDepthBuffer0,
RTHandle intermediateColorBuffer, RTHandle intermediateUpscaleBuffer)
{
// Compute the number of tiles to evaluate
int finalTX = (parameters.finalWidth + (8 - 1)) / 8;
int finalTY = (parameters.finalHeight + (8 - 1)) / 8;
// Bind the sampling textures
BlueNoise.BindDitheredTextureSet(cmd, parameters.commonData.ditheredTextureSet);
// Set the multi compiles
CoreUtils.SetKeyword(cmd, "LOCAL_VOLUMETRIC_CLOUDS", parameters.commonData.localClouds);
// Bind the constant buffer
ConstantBuffer.Push(cmd, parameters.commonData.cloudsCB, parameters.commonData.volumetricCloudsCS, HDShaderIDs._ShaderVariablesClouds);
using (new ProfilingScope(cmd, ProfilingSampler.Get(HDProfileId.VolumetricCloudsTrace)))
{
// Ray-march the clouds for this frame
CoreUtils.SetKeyword(cmd, "PHYSICALLY_BASED_SUN", parameters.commonData.cloudsCB._PhysicallyBasedSun == 1);
cmd.SetComputeTextureParam(parameters.commonData.volumetricCloudsCS, parameters.renderKernel, HDShaderIDs._MaxZMaskTexture, maxZMask);
cmd.SetComputeTextureParam(parameters.commonData.volumetricCloudsCS, parameters.renderKernel, HDShaderIDs._VolumetricCloudsSourceDepth, depthPyramid);
cmd.SetComputeTextureParam(parameters.commonData.volumetricCloudsCS, parameters.renderKernel, HDShaderIDs._Worley128RGBA, parameters.commonData.worley128RGBA);
cmd.SetComputeTextureParam(parameters.commonData.volumetricCloudsCS, parameters.renderKernel, HDShaderIDs._ErosionNoise, parameters.commonData.erosionNoise);
cmd.SetComputeTextureParam(parameters.commonData.volumetricCloudsCS, parameters.renderKernel, HDShaderIDs._CloudMapTexture, parameters.commonData.cloudMapTexture);
cmd.SetComputeTextureParam(parameters.commonData.volumetricCloudsCS, parameters.renderKernel, HDShaderIDs._CloudLutTexture, parameters.commonData.cloudLutTexture);
cmd.SetComputeBufferParam(parameters.commonData.volumetricCloudsCS, parameters.renderKernel, HDShaderIDs._VolumetricCloudsAmbientProbeBuffer, ambientProbeBuffer);
// Output buffers
cmd.SetComputeTextureParam(parameters.commonData.volumetricCloudsCS, parameters.renderKernel, HDShaderIDs._CloudsLightingTextureRW, intermediateLightingBuffer0);
cmd.SetComputeTextureParam(parameters.commonData.volumetricCloudsCS, parameters.renderKernel, HDShaderIDs._CloudsDepthTextureRW, intermediateDepthBuffer0);
cmd.DispatchCompute(parameters.commonData.volumetricCloudsCS, parameters.renderKernel, finalTX, finalTY, parameters.viewCount);
CoreUtils.SetKeyword(cmd, "PHYSICALLY_BASED_SUN", false);
}
using (new ProfilingScope(cmd, ProfilingSampler.Get(HDProfileId.VolumetricCloudsUpscaleAndCombine)))
{
if (parameters.needExtraColorBufferCopy)
{
HDUtils.BlitCameraTexture(cmd, colorBuffer, intermediateColorBuffer);
}
// Define which kernel to use
cmd.SetComputeTextureParam(parameters.commonData.volumetricCloudsCS, parameters.combineKernel, HDShaderIDs._VolumetricCloudsTexture, intermediateLightingBuffer0);
cmd.SetComputeTextureParam(parameters.commonData.volumetricCloudsCS, parameters.combineKernel, HDShaderIDs._DepthStatusTexture, intermediateDepthBuffer0);
cmd.SetComputeTextureParam(parameters.commonData.volumetricCloudsCS, parameters.combineKernel, HDShaderIDs._DepthTexture, depthPyramid);
cmd.SetComputeTextureParam(parameters.commonData.volumetricCloudsCS, parameters.combineKernel, HDShaderIDs._CameraColorTexture, intermediateColorBuffer);
cmd.SetComputeTextureParam(parameters.commonData.volumetricCloudsCS, parameters.combineKernel, HDShaderIDs._VBufferLighting, volumetricLightingTexture);
if (parameters.commonData.cloudsCB._PhysicallyBasedSun == 0)
{
// This has to be done in the global space given that the "correct" one happens in the global space.
// If we do it in the local space, there are some cases when the previous frames local take precedence over the current frame global one.
cmd.SetGlobalTexture(HDShaderIDs._AirSingleScatteringTexture, scatteringFallbackTexture);
cmd.SetGlobalTexture(HDShaderIDs._AerosolSingleScatteringTexture, scatteringFallbackTexture);
cmd.SetGlobalTexture(HDShaderIDs._MultipleScatteringTexture, scatteringFallbackTexture);
}
if (parameters.needsTemporaryBuffer)
{
CoreUtils.SetKeyword(cmd, "USE_INTERMEDIATE_BUFFER", true);
// Provide this second upscaling + combine strategy in case a temporary buffer is requested (ie MSAA).
// In the case of an MSAA color target, we cannot use the in-place blending of the clouds with the color target.
cmd.SetComputeTextureParam(parameters.commonData.volumetricCloudsCS, parameters.combineKernel, HDShaderIDs._VolumetricCloudsUpscaleTextureRW, intermediateUpscaleBuffer);
// Perform the upscale into an intermediate buffer.
cmd.DispatchCompute(parameters.commonData.volumetricCloudsCS, parameters.combineKernel, finalTX, finalTY, parameters.viewCount);
parameters.cloudCombinePass.SetTexture(HDShaderIDs._VolumetricCloudsUpscaleTextureRW, intermediateUpscaleBuffer);
// Composite the clouds into the MSAA target via hardware blending.
HDUtils.DrawFullScreen(cmd, parameters.cloudCombinePass, colorBuffer, null, 0);
CoreUtils.SetKeyword(cmd, "USE_INTERMEDIATE_BUFFER", false);
}
else
{
cmd.SetComputeTextureParam(parameters.commonData.volumetricCloudsCS, parameters.combineKernel, HDShaderIDs._VolumetricCloudsUpscaleTextureRW, colorBuffer);
// Perform the upscale and combine with the color buffer in place.
cmd.DispatchCompute(parameters.commonData.volumetricCloudsCS, parameters.combineKernel, finalTX, finalTY, parameters.viewCount);
}
}
// Reset all the multi-compiles
CoreUtils.SetKeyword(cmd, "LOCAL_VOLUMETRIC_CLOUDS", false);
}
