static void RTIndirectDiffuseDirGen(CommandBuffer cmd, RTIndirectDiffuseDirGenParameters rtidDirGenParams, RTIndirectDiffuseDirGenResources rtidDirGenResources)
{
// Inject the ray-tracing sampling data
BlueNoise.BindDitheredTextureSet(cmd, rtidDirGenParams.ditheredTextureSet);
// Bind all the required textures
cmd.SetComputeTextureParam(rtidDirGenParams.directionGenCS, rtidDirGenParams.dirGenKernel, HDShaderIDs._DepthTexture, rtidDirGenResources.depthStencilBuffer);
cmd.SetComputeTextureParam(rtidDirGenParams.directionGenCS, rtidDirGenParams.dirGenKernel, HDShaderIDs._NormalBufferTexture, rtidDirGenResources.normalBuffer);
// Bind the output buffers
cmd.SetComputeTextureParam(rtidDirGenParams.directionGenCS, rtidDirGenParams.dirGenKernel, HDShaderIDs._RaytracingDirectionBuffer, rtidDirGenResources.outputBuffer);
int numTilesXHR, numTilesYHR;
if (rtidDirGenParams.fullResolution)
{
// Evaluate the dispatch parameters
numTilesXHR = (rtidDirGenParams.texWidth + (rtReflectionsComputeTileSize - 1)) / rtReflectionsComputeTileSize;
numTilesYHR = (rtidDirGenParams.texHeight + (rtReflectionsComputeTileSize - 1)) / rtReflectionsComputeTileSize;
}
else
{
// Evaluate the dispatch parameters
numTilesXHR = (rtidDirGenParams.texWidth / 2 + (rtReflectionsComputeTileSize - 1)) / rtReflectionsComputeTileSize;
numTilesYHR = (rtidDirGenParams.texHeight / 2 + (rtReflectionsComputeTileSize - 1)) / rtReflectionsComputeTileSize;
}
// Compute the directions
cmd.DispatchCompute(rtidDirGenParams.directionGenCS, rtidDirGenParams.dirGenKernel, numTilesXHR, numTilesYHR, rtidDirGenParams.viewCount);
}
void RenderIndirectDiffusePerformance(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, int frameCount)
{
// Fetch the required resources
var settings = hdCamera.volumeStack.GetComponent <GlobalIllumination>();
// Request the intermediate texture we will be using
RTHandle directionBuffer = GetRayTracingBuffer(InternalRayTracingBuffers.Direction);
RTHandle intermediateBuffer1 = GetRayTracingBuffer(InternalRayTracingBuffers.RGBA1);
using (new ProfilingScope(cmd, ProfilingSampler.Get(HDProfileId.RaytracingIndirectDiffuseDirectionGeneration)))
{
// Prepare the components for the direction generation
RTIndirectDiffuseDirGenParameters rtidDirGenParameters = PrepareRTIndirectDiffuseDirGenParameters(hdCamera, settings);
RTIndirectDiffuseDirGenResources rtidDirGenResousources = PrepareRTIndirectDiffuseDirGenResources(hdCamera, directionBuffer);
RTIndirectDiffuseDirGen(cmd, rtidDirGenParameters, rtidDirGenResousources);
}
using (new ProfilingScope(cmd, ProfilingSampler.Get(HDProfileId.RaytracingIndirectDiffuseEvaluation)))
{
// Prepare the components for the deferred lighting
DeferredLightingRTParameters deferredParamters = PrepareIndirectDiffuseDeferredLightingRTParameters(hdCamera);
DeferredLightingRTResources deferredResources = PrepareDeferredLightingRTResources(hdCamera, directionBuffer, intermediateBuffer1);
RenderRaytracingDeferredLighting(cmd, deferredParamters, deferredResources);
}
using (new ProfilingScope(cmd, ProfilingSampler.Get(HDProfileId.RaytracingIndirectDiffuseUpscale)))
{
// Upscale the indirect diffuse buffer
RTIndirectDiffuseUpscaleParameters rtidUpscaleParameters = PrepareRTIndirectDiffuseUpscaleParameters(hdCamera, settings);
RTIndirectDiffuseUpscaleResources rtidUpscaleResources = PrepareRTIndirectDiffuseUpscaleResources(hdCamera, intermediateBuffer1, directionBuffer, m_IndirectDiffuseBuffer0);
RTIndirectDiffuseUpscale(cmd, rtidUpscaleParameters, rtidUpscaleResources);
}
using (new ProfilingScope(cmd, ProfilingSampler.Get(HDProfileId.RaytracingFilterIndirectDiffuse)))
{
// Denoise if required
if (settings.denoise)
{
DenoiseIndirectDiffuseBuffer(hdCamera, cmd, settings);
}
}
using (new ProfilingScope(cmd, ProfilingSampler.Get(HDProfileId.RaytracingIndirectDiffuseAdjustWeight)))
{
// Upscale the indirect diffuse buffer
AdjustRTIDWeightParameters artidParamters = PrepareAdjustRTIDWeightParametersParameters(hdCamera);
AdjustRTIDWeight(cmd, artidParamters, m_IndirectDiffuseBuffer0, m_SharedRTManager.GetDepthStencilBuffer(), m_SharedRTManager.GetStencilBuffer());
}
}
RTIndirectDiffuseDirGenParameters PrepareRTIndirectDiffuseDirGenParameters(HDCamera hdCamera, GlobalIllumination settings)
{
RTIndirectDiffuseDirGenParameters rtidDirGenParams = new RTIndirectDiffuseDirGenParameters();
// Set the camera parameters
rtidDirGenParams.texWidth = hdCamera.actualWidth;
rtidDirGenParams.texHeight = hdCamera.actualHeight;
rtidDirGenParams.viewCount = hdCamera.viewCount;
// Set the generation parameters
rtidDirGenParams.fullResolution = settings.fullResolution;
// Grab the right kernel
rtidDirGenParams.directionGenCS = m_Asset.renderPipelineRayTracingResources.indirectDiffuseRaytracingCS;
rtidDirGenParams.dirGenKernel = settings.fullResolution ? m_RaytracingIndirectDiffuseFullResKernel : m_RaytracingIndirectDiffuseHalfResKernel;
// Grab the additional parameters
BlueNoise blueNoise = GetBlueNoiseManager();
rtidDirGenParams.ditheredTextureSet = blueNoise.DitheredTextureSet8SPP();
rtidDirGenParams.shaderVariablesRayTracingCB = m_ShaderVariablesRayTracingCB;
return(rtidDirGenParams);
}
