void BindRayTracedReflectionData(CommandBuffer cmd, HDCamera hdCamera, HDRaytracingEnvironment rtEnvironment, RayTracingShader reflectionShader, ScreenSpaceReflection settings, LightCluster lightClusterSettings)
{
// Grab the acceleration structures and the light cluster to use
RayTracingAccelerationStructure accelerationStructure = m_RayTracingManager.RequestAccelerationStructure(rtEnvironment.reflLayerMask);
HDRaytracingLightCluster lightCluster = m_RayTracingManager.RequestLightCluster(rtEnvironment.reflLayerMask);
BlueNoise blueNoise = m_RayTracingManager.GetBlueNoiseManager();
// Define the shader pass to use for the reflection pass
cmd.SetRayTracingShaderPass(reflectionShader, "IndirectDXR");
// Set the acceleration structure for the pass
cmd.SetRayTracingAccelerationStructure(reflectionShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Global reflection parameters
cmd.SetRayTracingFloatParams(reflectionShader, HDShaderIDs._RaytracingIntensityClamp, settings.clampValue.value);
cmd.SetRayTracingFloatParams(reflectionShader, HDShaderIDs._RaytracingReflectionMinSmoothness, settings.minSmoothness.value);
cmd.SetRayTracingIntParams(reflectionShader, HDShaderIDs._RaytracingIncludeSky, settings.reflectSky.value ? 1 : 0);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironment.rayBias);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayMaxLength, settings.rayLength.value);
cmd.SetRayTracingIntParams(reflectionShader, HDShaderIDs._RaytracingNumSamples, settings.sampleCount.value);
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)m_FrameCount % 8;
cmd.SetRayTracingIntParam(reflectionShader, HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Inject the ray-tracing sampling data
blueNoise.BindDitheredRNGData8SPP(cmd);
// Set the data for the ray generation
cmd.SetRayTracingTextureParam(reflectionShader, HDShaderIDs._SsrLightingTextureRW, m_ReflIntermediateTexture0);
cmd.SetRayTracingTextureParam(reflectionShader, HDShaderIDs._SsrHitPointTexture, m_ReflIntermediateTexture1);
cmd.SetRayTracingTextureParam(reflectionShader, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(reflectionShader, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
// Set ray count tex
cmd.SetRayTracingIntParam(reflectionShader, HDShaderIDs._RayCountEnabled, m_RayTracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRayTracingTextureParam(reflectionShader, HDShaderIDs._RayCountTexture, m_RayTracingManager.rayCountManager.GetRayCountTexture());
// Compute the pixel spread value
float pixelSpreadAngle = Mathf.Atan(2.0f * Mathf.Tan(hdCamera.camera.fieldOfView * Mathf.PI / 360.0f) / Mathf.Min(hdCamera.actualWidth, hdCamera.actualHeight));
cmd.SetGlobalFloat(HDShaderIDs._RaytracingPixelSpreadAngle, pixelSpreadAngle);
// Bind the lightLoop data
lightCluster.BindLightClusterData(cmd);
// Note: Just in case, we rebind the directional light data (in case they were not)
cmd.SetGlobalBuffer(HDShaderIDs._DirectionalLightDatas, m_LightLoopLightData.directionalLightData);
cmd.SetGlobalInt(HDShaderIDs._DirectionalLightCount, m_lightList.directionalLights.Count);
// Evaluate the clear coat mask texture based on the lit shader mode
RenderTargetIdentifier clearCoatMaskTexture = hdCamera.frameSettings.litShaderMode == LitShaderMode.Deferred ? m_GbufferManager.GetBuffersRTI()[2] : TextureXR.GetBlackTexture();
cmd.SetRayTracingTextureParam(reflectionShader, HDShaderIDs._SsrClearCoatMaskTexture, clearCoatMaskTexture);
// Set the number of bounces for reflections
cmd.SetGlobalInt(HDShaderIDs._RaytracingMaxRecursion, settings.bounceCount.value);
}
internal int RayTracingFrameIndex(HDCamera hdCamera)
{
#if UNITY_HDRP_DXR_TESTS_DEFINE
if (Application.isPlaying)
{
return(0);
}
else
#endif
return(hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)m_FrameCount % 8);
}
void BindRayTracedIndirectDiffuseData(CommandBuffer cmd, HDCamera hdCamera
, RayTracingShader indirectDiffuseShader
, GlobalIllumination settings, LightCluster lightClusterSettings, RayTracingSettings rtSettings
, RTHandle outputLightingBuffer, RTHandle outputHitPointBuffer)
{
// Grab the acceleration structures and the light cluster to use
RayTracingAccelerationStructure accelerationStructure = RequestAccelerationStructure();
HDRaytracingLightCluster lightCluster = RequestLightCluster();
BlueNoise blueNoise = GetBlueNoiseManager();
// Define the shader pass to use for the indirect diffuse pass
cmd.SetRayTracingShaderPass(indirectDiffuseShader, "IndirectDXR");
// Set the acceleration structure for the pass
cmd.SetRayTracingAccelerationStructure(indirectDiffuseShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
blueNoise.BindDitheredRNGData8SPP(cmd);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtSettings.rayBias.value);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayMaxLength, settings.rayLength.value);
cmd.SetRayTracingIntParams(indirectDiffuseShader, HDShaderIDs._RaytracingNumSamples, settings.sampleCount.value);
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)m_FrameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Set the data for the ray generation
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._IndirectDiffuseTextureRW, outputLightingBuffer);
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._IndirectDiffuseHitPointTextureRW, outputHitPointBuffer);
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
// Set the indirect diffuse parameters
cmd.SetRayTracingFloatParams(indirectDiffuseShader, HDShaderIDs._RaytracingIntensityClamp, settings.clampValue.value);
// Set ray count texture
RayCountManager rayCountManager = GetRayCountManager();
cmd.SetRayTracingIntParam(indirectDiffuseShader, HDShaderIDs._RayCountEnabled, rayCountManager.RayCountIsEnabled());
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._RayCountTexture, rayCountManager.GetRayCountTexture());
// Compute the pixel spread value
cmd.SetRayTracingFloatParam(indirectDiffuseShader, HDShaderIDs._RaytracingPixelSpreadAngle, GetPixelSpreadAngle(hdCamera.camera.fieldOfView, hdCamera.actualWidth, hdCamera.actualHeight));
// LightLoop data
lightCluster.BindLightClusterData(cmd);
// Set the data for the ray miss
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._SkyTexture, m_SkyManager.GetSkyReflection(hdCamera));
// Set the number of bounces to 1
cmd.SetGlobalInt(HDShaderIDs._RaytracingMaxRecursion, settings.bounceCount.value);
}
public void BindRayTracedIndirectDiffuseData(CommandBuffer cmd, HDCamera hdCamera, HDRaytracingEnvironment rtEnvironment, RayTracingShader indirectDiffuseShader, GlobalIllumination settings, LightCluster lightClusterSettings)
{
// Grab the acceleration structures and the light cluster to use
RayTracingAccelerationStructure accelerationStructure = m_RayTracingManager.RequestAccelerationStructure(rtEnvironment.indirectDiffuseLayerMask);
HDRaytracingLightCluster lightCluster = m_RayTracingManager.RequestLightCluster(rtEnvironment.indirectDiffuseLayerMask);
// Define the shader pass to use for the indirect diffuse pass
cmd.SetRayTracingShaderPass(indirectDiffuseShader, "IndirectDXR");
// Set the acceleration structure for the pass
cmd.SetRayTracingAccelerationStructure(indirectDiffuseShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
cmd.SetGlobalTexture(HDShaderIDs._OwenScrambledRGTexture, m_Asset.renderPipelineResources.textures.owenScrambledRGBATex);
cmd.SetGlobalTexture(HDShaderIDs._OwenScrambledTexture, m_Asset.renderPipelineResources.textures.owenScrambled256Tex);
cmd.SetGlobalTexture(HDShaderIDs._ScramblingTexture, m_Asset.renderPipelineResources.textures.scramblingTex);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironment.rayBias);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayMaxLength, settings.rayLength.value);
cmd.SetRayTracingIntParams(indirectDiffuseShader, HDShaderIDs._RaytracingNumSamples, settings.numSamples.value);
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)m_FrameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Set the data for the ray generation
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._IndirectDiffuseTextureRW, m_IDIntermediateBuffer0);
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._IndirectDiffuseHitPointTextureRW, m_IDIntermediateBuffer1);
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
// Set the indirect diffuse parameters
cmd.SetRayTracingFloatParams(indirectDiffuseShader, HDShaderIDs._RaytracingIntensityClamp, settings.clampValue.value);
// Set ray count texture
cmd.SetRayTracingIntParam(indirectDiffuseShader, HDShaderIDs._RayCountEnabled, m_RayTracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._RayCountTexture, m_RayTracingManager.rayCountManager.rayCountTexture);
// Compute the pixel spread value
float pixelSpreadAngle = Mathf.Atan(2.0f * Mathf.Tan(hdCamera.camera.fieldOfView * Mathf.PI / 360.0f) / Mathf.Min(hdCamera.actualWidth, hdCamera.actualHeight));
cmd.SetRayTracingFloatParam(indirectDiffuseShader, HDShaderIDs._RaytracingPixelSpreadAngle, pixelSpreadAngle);
// LightLoop data
lightCluster.BindLightClusterData(cmd);
// Set the data for the ray miss
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._SkyTexture, m_SkyManager.skyReflection);
// Set the number of bounces to 1
cmd.SetGlobalInt(HDShaderIDs._RaytracingMaxRecursion, settings.numBounces.value);
}
public void RenderAO(HDCamera hdCamera, CommandBuffer cmd, RTHandle outputTexture, ScriptableRenderContext renderContext, int frameCount)
{
// Let's check all the resources
HDRaytracingEnvironment rtEnvironment = m_RaytracingManager.CurrentEnvironment();
BlueNoise blueNoise = m_RaytracingManager.GetBlueNoiseManager();
// Check if the state is valid for evaluating ambient occlusion
bool invalidState = rtEnvironment == null;
// If any of the previous requirements is missing, the effect is not requested or no acceleration structure, set the default one and leave right away
if (invalidState)
{
SetDefaultAmbientOcclusionTexture(cmd);
return;
}
RayTracingShader aoShader = m_PipelineRayTracingResources.aoRaytracing;
var aoSettings = VolumeManager.instance.stack.GetComponent <AmbientOcclusion>();
// Grab the acceleration structure for the target camera
RayTracingAccelerationStructure accelerationStructure = m_RaytracingManager.RequestAccelerationStructure(rtEnvironment.aoLayerMask);
// Define the shader pass to use for the reflection pass
cmd.SetRayTracingShaderPass(aoShader, "VisibilityDXR");
// Set the acceleration structure for the pass
cmd.SetRayTracingAccelerationStructure(aoShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray generation data
cmd.SetRayTracingFloatParams(aoShader, HDShaderIDs._RaytracingRayBias, rtEnvironment.rayBias);
cmd.SetRayTracingFloatParams(aoShader, HDShaderIDs._RaytracingRayMaxLength, aoSettings.rayLength.value);
cmd.SetRayTracingIntParams(aoShader, HDShaderIDs._RaytracingNumSamples, aoSettings.sampleCount.value);
// Set the data for the ray generation
cmd.SetRayTracingTextureParam(aoShader, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(aoShader, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)frameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Inject the ray-tracing sampling data
blueNoise.BindDitheredRNGData8SPP(cmd);
// Value used to scale the ao intensity
cmd.SetRayTracingFloatParam(aoShader, HDShaderIDs._RaytracingAOIntensity, aoSettings.intensity.value);
cmd.SetRayTracingIntParam(aoShader, HDShaderIDs._RayCountEnabled, m_RaytracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRayTracingTextureParam(aoShader, HDShaderIDs._RayCountTexture, m_RaytracingManager.rayCountManager.GetRayCountTexture());
// Set the output textures
cmd.SetRayTracingTextureParam(aoShader, HDShaderIDs._AmbientOcclusionTextureRW, m_AOIntermediateBuffer0);
// Run the computation
cmd.DispatchRays(aoShader, m_RayGenShaderName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, (uint)hdCamera.viewCount);
using (new ProfilingSample(cmd, "Filter Ambient Occlusion", CustomSamplerId.RaytracingAmbientOcclusion.GetSampler()))
{
if (aoSettings.denoise.value)
{
// Grab the history buffer
RTHandle ambientOcclusionHistory = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedAmbientOcclusion)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedAmbientOcclusion, AmbientOcclusionHistoryBufferAllocatorFunction, 1);
// Apply the temporal denoiser
HDTemporalFilter temporalFilter = m_RaytracingManager.GetTemporalFilter();
temporalFilter.DenoiseBuffer(cmd, hdCamera, m_AOIntermediateBuffer0, ambientOcclusionHistory, m_AOIntermediateBuffer1);
// Apply the diffuse denoiser
HDDiffuseDenoiser diffuseDenoiser = m_RaytracingManager.GetDiffuseDenoiser();
diffuseDenoiser.DenoiseBuffer(cmd, hdCamera, m_AOIntermediateBuffer1, outputTexture, aoSettings.denoiserRadius.value);
}
else
{
HDUtils.BlitCameraTexture(cmd, m_AOIntermediateBuffer0, outputTexture);
}
}
// Bind the textures and the params
cmd.SetGlobalTexture(HDShaderIDs._AmbientOcclusionTexture, outputTexture);
cmd.SetGlobalVector(HDShaderIDs._AmbientOcclusionParam, new Vector4(0f, 0f, 0f, VolumeManager.instance.stack.GetComponent <AmbientOcclusion>().directLightingStrength.value));
// TODO: All the push-debug stuff should be centralized somewhere
(RenderPipelineManager.currentPipeline as HDRenderPipeline).PushFullScreenDebugTexture(hdCamera, cmd, outputTexture, FullScreenDebugMode.SSAO);
}
public void RenderReflectionsT1(HDCamera hdCamera, CommandBuffer cmd, RTHandle outputTexture, ScriptableRenderContext renderContext, int frameCount)
{
// Fetch the required resources
BlueNoise blueNoise = GetBlueNoiseManager();
RayTracingShader reflectionShaderRT = m_Asset.renderPipelineRayTracingResources.reflectionRaytracingRT;
ComputeShader reflectionShaderCS = m_Asset.renderPipelineRayTracingResources.reflectionRaytracingCS;
ComputeShader reflectionFilter = m_Asset.renderPipelineRayTracingResources.reflectionBilateralFilterCS;
// Fetch all the settings
var settings = VolumeManager.instance.stack.GetComponent <ScreenSpaceReflection>();
LightCluster lightClusterSettings = VolumeManager.instance.stack.GetComponent <LightCluster>();
RayTracingSettings rtSettings = VolumeManager.instance.stack.GetComponent <RayTracingSettings>();
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesXHR = 0, numTilesYHR = 0;
int currentKernel = 0;
RenderTargetIdentifier clearCoatMaskTexture;
using (new ProfilingSample(cmd, "Ray Traced Reflection", CustomSamplerId.RaytracingIntegrateReflection.GetSampler()))
{
if (settings.deferredMode.value)
{
// Fetch the new sample kernel
currentKernel = reflectionShaderCS.FindKernel(settings.fullResolution.value ? "RaytracingReflectionsFullRes" : "RaytracingReflectionsHalfRes");
// Inject the ray-tracing sampling data
blueNoise.BindDitheredRNGData8SPP(cmd);
// Bind all the required textures
cmd.SetComputeTextureParam(reflectionShaderCS, currentKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(reflectionShaderCS, currentKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
clearCoatMaskTexture = hdCamera.frameSettings.litShaderMode == LitShaderMode.Deferred ? m_GbufferManager.GetBuffersRTI()[2] : TextureXR.GetBlackTexture();
cmd.SetComputeTextureParam(reflectionShaderCS, currentKernel, HDShaderIDs._SsrClearCoatMaskTexture, clearCoatMaskTexture);
// Bind all the required scalars
cmd.SetComputeFloatParam(reflectionShaderCS, HDShaderIDs._RaytracingIntensityClamp, settings.clampValue.value);
cmd.SetComputeFloatParam(reflectionShaderCS, HDShaderIDs._RaytracingReflectionMinSmoothness, settings.minSmoothness.value);
cmd.SetComputeIntParam(reflectionShaderCS, HDShaderIDs._RaytracingIncludeSky, settings.reflectSky.value ? 1 : 0);
// Bind the sampling data
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)m_FrameCount % 8;
cmd.SetComputeIntParam(reflectionShaderCS, HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Bind the output buffers
cmd.SetComputeTextureParam(reflectionShaderCS, currentKernel, HDShaderIDs._RaytracingDirectionBuffer, m_ReflIntermediateTexture1);
if (settings.fullResolution.value)
{
// Evaluate the dispatch parameters
numTilesXHR = (texWidth + (areaTileSize - 1)) / areaTileSize;
numTilesYHR = (texHeight + (areaTileSize - 1)) / areaTileSize;
}
else
{
// Evaluate the dispatch parameters
numTilesXHR = (texWidth / 2 + (areaTileSize - 1)) / areaTileSize;
numTilesYHR = (texHeight / 2 + (areaTileSize - 1)) / areaTileSize;
}
// Compute the directions
cmd.DispatchCompute(reflectionShaderCS, currentKernel, numTilesXHR, numTilesYHR, hdCamera.viewCount);
// Prepare the components for the deferred lighting
DeferredLightingRTParameters deferredParamters = PrepareReflectionDeferredLightingRTParameters(hdCamera);
DeferredLightingRTResources deferredResources = PrepareDeferredLightingRTResources(hdCamera, m_ReflIntermediateTexture1, m_ReflIntermediateTexture0);
// Evaluate the deferred lighting
RenderRaytracingDeferredLighting(cmd, deferredParamters, deferredResources);
}
else
{
// Bind all the required data for ray tracing
BindRayTracedReflectionData(cmd, hdCamera, reflectionShaderRT, settings, lightClusterSettings, rtSettings);
// Run the computation
if (settings.fullResolution.value)
{
cmd.DispatchRays(reflectionShaderRT, m_RayGenReflectionFullResName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, (uint)hdCamera.viewCount);
}
else
{
// Run the computation
cmd.DispatchRays(reflectionShaderRT, m_RayGenReflectionHalfResName, (uint)(hdCamera.actualWidth / 2), (uint)(hdCamera.actualHeight / 2), (uint)hdCamera.viewCount);
}
}
// Fetch the right filter to use
if (settings.fullResolution.value)
{
currentKernel = reflectionFilter.FindKernel("ReflectionIntegrationUpscaleFullRes");
}
else
{
currentKernel = reflectionFilter.FindKernel("ReflectionIntegrationUpscaleHalfRes");
}
// Inject all the parameters for the compute
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._SsrLightingTextureRW, m_ReflIntermediateTexture0);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._SsrHitPointTexture, m_ReflIntermediateTexture1);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._BlueNoiseTexture, blueNoise.textureArray16RGB);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, "_RaytracingReflectionTexture", outputTexture);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._ScramblingTexture, m_Asset.renderPipelineResources.textures.scramblingTex);
cmd.SetComputeIntParam(reflectionFilter, HDShaderIDs._SpatialFilterRadius, settings.upscaleRadius.value);
cmd.SetComputeIntParam(reflectionFilter, HDShaderIDs._RaytracingDenoiseRadius, settings.denoise.value ? settings.denoiserRadius.value : 0);
cmd.SetComputeFloatParam(reflectionFilter, HDShaderIDs._RaytracingReflectionMinSmoothness, settings.minSmoothness.value);
numTilesXHR = (texWidth + (areaTileSize - 1)) / areaTileSize;
numTilesYHR = (texHeight + (areaTileSize - 1)) / areaTileSize;
// Bind the right texture for clear coat support
clearCoatMaskTexture = hdCamera.frameSettings.litShaderMode == LitShaderMode.Deferred ? m_GbufferManager.GetBuffersRTI()[2] : TextureXR.GetBlackTexture();
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._SsrClearCoatMaskTexture, clearCoatMaskTexture);
// Compute the texture
cmd.DispatchCompute(reflectionFilter, currentKernel, numTilesXHR, numTilesYHR, hdCamera.viewCount);
}
using (new ProfilingSample(cmd, "Filter Reflection", CustomSamplerId.RaytracingFilterReflection.GetSampler()))
{
if (settings.denoise.value)
{
// Grab the history buffer
RTHandle reflectionHistory = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedReflection)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedReflection, ReflectionHistoryBufferAllocatorFunction, 1);
HDSimpleDenoiser simpleDenoiser = GetSimpleDenoiser();
simpleDenoiser.DenoiseBuffer(cmd, hdCamera, outputTexture, reflectionHistory, m_ReflIntermediateTexture0, settings.denoiserRadius.value, singleChannel: false);
HDUtils.BlitCameraTexture(cmd, m_ReflIntermediateTexture0, outputTexture);
}
}
}
public void RenderIndirectDiffuseT1(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, int frameCount)
{
// Fetch the required resources
HDRaytracingEnvironment rtEnvironment = m_RayTracingManager.CurrentEnvironment();
var settings = VolumeManager.instance.stack.GetComponent <GlobalIllumination>();
BlueNoise blueNoise = m_RayTracingManager.GetBlueNoiseManager();
// Fetch all the settings
LightCluster lightClusterSettings = VolumeManager.instance.stack.GetComponent <LightCluster>();
if (settings.deferredMode.value)
{
ComputeShader indirectDiffuseCS = m_Asset.renderPipelineRayTracingResources.indirectDiffuseRaytracingCS;
// Fetch the new sample kernel
int currentKernel = indirectDiffuseCS.FindKernel("RaytracingIndirectDiffuseFullRes");
// Bind all the required textures
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._OwenScrambledRGTexture, m_Asset.renderPipelineResources.textures.owenScrambledRGBATex);
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._OwenScrambledTexture, m_Asset.renderPipelineResources.textures.owenScrambled256Tex);
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._ScramblingTexture, m_Asset.renderPipelineResources.textures.scramblingTex);
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
// Bind all the required scalars
cmd.SetComputeFloatParam(indirectDiffuseCS, HDShaderIDs._RaytracingIntensityClamp, settings.clampValue.value);
// Bind the sampling data
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)m_FrameCount % 8;
cmd.SetComputeIntParam(indirectDiffuseCS, HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Bind the output buffers
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesXHR = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesYHR = (texHeight + (areaTileSize - 1)) / areaTileSize;
// Compute the directions
cmd.DispatchCompute(indirectDiffuseCS, currentKernel, numTilesXHR, numTilesYHR, 1);
// Prepare the components for the deferred lighting
DeferredLightingRTParameters deferredParamters = PrepareIndirectDiffuseDeferredLightingRTParameters(hdCamera, rtEnvironment);
DeferredLightingRTResources deferredResources = PrepareDeferredLightingRTResources(m_RaytracingDirectionBuffer, m_IDIntermediateBuffer0);
// Evaluate the deferred lighting
RenderRaytracingDeferredLighting(cmd, deferredParamters, deferredResources);
}
else
{
RayTracingShader indirectDiffuseRT = m_Asset.renderPipelineRayTracingResources.indirectDiffuseRaytracingRT;
BindRayTracedIndirectDiffuseData(cmd, hdCamera, rtEnvironment, indirectDiffuseRT, settings, lightClusterSettings);
// Set the data for the ray miss
cmd.SetRayTracingTextureParam(indirectDiffuseRT, HDShaderIDs._SkyTexture, m_SkyManager.skyReflection);
// Run the computation
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTING_ONLY", true);
CoreUtils.SetKeyword(cmd, "MULTI_BOUNCE_INDIRECT", false);
// Run the computation
cmd.DispatchRays(indirectDiffuseRT, m_RayGenIndirectDiffuseFullResName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTING_ONLY", false);
}
using (new ProfilingSample(cmd, "Filter Indirect Diffuse", CustomSamplerId.RaytracingFilterIndirectDiffuse.GetSampler()))
{
if (settings.enableFilter.value)
{
// Grab the history buffer
RTHandle indirectDiffuseHistory = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedIndirectDiffuse)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedIndirectDiffuse, IndirectDiffuseHistoryBufferAllocatorFunction, 1);
HDSimpleDenoiser simpleDenoiser = m_RayTracingManager.GetSimpleDenoiser();
simpleDenoiser.DenoiseBuffer(cmd, hdCamera, m_IDIntermediateBuffer0, indirectDiffuseHistory, m_IDIntermediateBuffer1, settings.filterRadius.value, singleChannel: false);
HDUtils.BlitCameraTexture(cmd, m_IDIntermediateBuffer1, m_IDIntermediateBuffer0);
}
}
}
public void RenderIndirectDiffuseT1(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, int frameCount)
{
// Fetch the required resources
var settings = VolumeManager.instance.stack.GetComponent <GlobalIllumination>();
BlueNoise blueNoise = GetBlueNoiseManager();
// Fetch all the settings
LightCluster lightClusterSettings = VolumeManager.instance.stack.GetComponent <LightCluster>();
RayTracingSettings rtSettings = VolumeManager.instance.stack.GetComponent <RayTracingSettings>();
ComputeShader indirectDiffuseCS = m_Asset.renderPipelineRayTracingResources.indirectDiffuseRaytracingCS;
using (new ProfilingSample(cmd, "Ray Trace Indirect Diffuse", CustomSamplerId.RaytracingIntegrateIndirectDiffuse.GetSampler()))
{
if (settings.deferredMode.value)
{
// Fetch the new sample kernel
int currentKernel = indirectDiffuseCS.FindKernel(settings.fullResolution.value ? "RaytracingIndirectDiffuseFullRes" : "RaytracingIndirectDiffuseHalfRes");
// Inject the ray-tracing sampling data
blueNoise.BindDitheredRNGData8SPP(cmd);
// Bind all the required textures
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
// Bind all the required scalars
cmd.SetComputeFloatParam(indirectDiffuseCS, HDShaderIDs._RaytracingIntensityClamp, settings.clampValue.value);
// Bind the sampling data
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)m_FrameCount % 8;
cmd.SetComputeIntParam(indirectDiffuseCS, HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Bind the output buffers
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesXHR = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesYHR = (texHeight + (areaTileSize - 1)) / areaTileSize;
// Compute the directions
cmd.DispatchCompute(indirectDiffuseCS, currentKernel, numTilesXHR, numTilesYHR, hdCamera.viewCount);
// Prepare the components for the deferred lighting
DeferredLightingRTParameters deferredParamters = PrepareIndirectDiffuseDeferredLightingRTParameters(hdCamera);
DeferredLightingRTResources deferredResources = PrepareDeferredLightingRTResources(hdCamera, m_RaytracingDirectionBuffer, m_IDIntermediateBuffer0);
// Evaluate the deferred lighting
RenderRaytracingDeferredLighting(cmd, deferredParamters, deferredResources);
}
else
{
RayTracingShader indirectDiffuseRT = m_Asset.renderPipelineRayTracingResources.indirectDiffuseRaytracingRT;
BindRayTracedIndirectDiffuseData(cmd, hdCamera, indirectDiffuseRT, settings, lightClusterSettings, rtSettings);
// Run the computation
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTING_ONLY", true);
CoreUtils.SetKeyword(cmd, "MULTI_BOUNCE_INDIRECT", false);
// Run the computation
cmd.DispatchRays(indirectDiffuseRT, m_RayGenIndirectDiffuseFullResName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, (uint)hdCamera.viewCount);
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTING_ONLY", false);
}
}
using (new ProfilingSample(cmd, "Filter Indirect Diffuse", CustomSamplerId.RaytracingFilterIndirectDiffuse.GetSampler()))
{
// Fetch the right filter to use
int currentKernel = indirectDiffuseCS.FindKernel(settings.fullResolution.value ? "IndirectDiffuseIntegrationUpscaleFullRes" : "IndirectDiffuseIntegrationUpscaleHalfRes");
// Inject all the parameters for the compute
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._IndirectDiffuseTexture, m_IDIntermediateBuffer0);
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._BlueNoiseTexture, blueNoise.textureArray16RGB);
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._UpscaledIndirectDiffuseTextureRW, m_IDIntermediateBuffer1);
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._ScramblingTexture, m_Asset.renderPipelineResources.textures.scramblingTex);
cmd.SetComputeIntParam(indirectDiffuseCS, HDShaderIDs._SpatialFilterRadius, settings.upscaleRadius.value);
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesXHR = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesYHR = (texHeight + (areaTileSize - 1)) / areaTileSize;
// Compute the texture
cmd.DispatchCompute(indirectDiffuseCS, currentKernel, numTilesXHR, numTilesYHR, hdCamera.viewCount);
// Copy the data back to the right buffer
HDUtils.BlitCameraTexture(cmd, m_IDIntermediateBuffer1, m_IDIntermediateBuffer0);
// Denoise if required
if (settings.denoise.value)
{
DenoiseIndirectDiffuseBuffer(hdCamera, cmd, settings);
}
}
}
bool RenderAreaShadows(HDCamera hdCamera, CommandBuffer cmd, int frameCount)
{
// Let's check all the resources and states to see if we should render the effect
HDRaytracingEnvironment rtEnvironment = m_RayTracingManager.CurrentEnvironment();
// Make sure everything is valid
bool invalidState = !hdCamera.frameSettings.IsEnabled(FrameSettingsField.RayTracing) ||
rtEnvironment == null ||
hdCamera.frameSettings.litShaderMode != LitShaderMode.Deferred;
// If invalid state or ray-tracing acceleration structure, we stop right away
if (invalidState)
{
return(false);
}
RayTracingShader shadowRayTrace = m_Asset.renderPipelineRayTracingResources.shadowRaytracingRT;
ComputeShader shadowsCompute = m_Asset.renderPipelineRayTracingResources.shadowRaytracingCS;
ComputeShader shadowFilter = m_Asset.renderPipelineRayTracingResources.shadowFilterCS;
// Grab the TAA history buffers (SN/UN and Analytic value)
RTHandle shadowHistoryArray = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedShadow)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedShadow, ShadowHistoryBufferAllocatorFunction, 1);
RTHandle areaAnalyticHistoryArray = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedAreaAnalytic)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedAreaAnalytic, AreaAnalyticHistoryBufferAllocatorFunction, 1);
// Grab the acceleration structure for the target camera
RayTracingAccelerationStructure accelerationStructure = m_RayTracingManager.RequestAccelerationStructure(rtEnvironment.shadowLayerMask);
// Define the shader pass to use for the reflection pass
cmd.SetRayTracingShaderPass(shadowRayTrace, "VisibilityDXR");
// Set the acceleration structure for the pass
cmd.SetRayTracingAccelerationStructure(shadowRayTrace, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
cmd.SetGlobalTexture(HDShaderIDs._OwenScrambledRGTexture, m_Asset.renderPipelineResources.textures.owenScrambledRGBATex);
cmd.SetGlobalTexture(HDShaderIDs._OwenScrambledTexture, m_Asset.renderPipelineResources.textures.owenScrambled256Tex);
cmd.SetGlobalTexture(HDShaderIDs._ScramblingTexture, m_Asset.renderPipelineResources.textures.scramblingTex);
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)frameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Temporal Filtering kernels
int applyTAAKernel = shadowFilter.FindKernel("AreaShadowApplyTAA");
int updateAnalyticHistory = shadowFilter.FindKernel("AreaAnalyticHistoryCopy");
int updateShadowHistory = shadowFilter.FindKernel("AreaShadowHistoryCopy");
// Spatial Filtering kernels
int estimateNoiseKernel = shadowFilter.FindKernel("AreaShadowEstimateNoise");
int firstDenoiseKernel = shadowFilter.FindKernel("AreaShadowDenoiseFirstPass");
int secondDenoiseKernel = shadowFilter.FindKernel("AreaShadowDenoiseSecondPass");
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesX = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesY = (texHeight + (areaTileSize - 1)) / areaTileSize;
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironment.rayBias);
int numLights = m_lightList.lights.Count;
for (int lightIdx = 0; lightIdx < numLights; ++lightIdx)
{
// If this is not a rectangular area light or it won't have shadows, skip it
if (m_lightList.lights[lightIdx].lightType != GPULightType.Rectangle || m_lightList.lights[lightIdx].screenSpaceShadowIndex == -1)
{
continue;
}
LightData currentLight = m_lightList.lights[lightIdx];
HDAdditionalLightData currentAdditionalLightData = GetCurrentRayTracedShadow(currentLight.screenSpaceShadowIndex);
using (new ProfilingSample(cmd, "Ray Traced Area Shadow", CustomSamplerId.RaytracingShadowIntegration.GetSampler()))
{
// We need to build the world to area light matrix
worldToLocalArea.SetColumn(0, currentLight.right);
worldToLocalArea.SetColumn(1, currentLight.up);
worldToLocalArea.SetColumn(2, currentLight.forward);
// Compensate the relative rendering if active
Vector3 lightPositionWS = currentLight.positionRWS;
if (ShaderConfig.s_CameraRelativeRendering != 0)
{
lightPositionWS += hdCamera.camera.transform.position;
}
worldToLocalArea.SetColumn(3, lightPositionWS);
worldToLocalArea.m33 = 1.0f;
worldToLocalArea = worldToLocalArea.inverse;
// We have noticed from extensive profiling that ray-trace shaders are not as effective for running per-pixel computation. In order to reduce that,
// we do a first prepass that compute the analytic term and probability and generates the first integration sample
if (true)
{
int shadowComputeKernel = shadowsCompute.FindKernel("RaytracingAreaShadowPrepass");
// This pass evaluates the analytic value and the generates and outputs the first sample
cmd.SetComputeBufferParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._LightDatas, m_LightLoopLightData.lightData);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingTargetAreaLight, lightIdx);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingNumSamples, currentAdditionalLightData.numRayTracingSamples);
cmd.SetComputeMatrixParam(shadowsCompute, HDShaderIDs._RaytracingAreaWorldToLocal, worldToLocalArea);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[0], m_GbufferManager.GetBuffer(0));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[1], m_GbufferManager.GetBuffer(1));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[2], m_GbufferManager.GetBuffer(2));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[3], m_GbufferManager.GetBuffer(3));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._AreaCookieTextures, m_TextureCaches.areaLightCookieManager.GetTexCache());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedAreaShadowIntegration, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedAreaShadowSample, m_DenoiseBuffer1);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracingDistanceBuffer, m_RaytracingDistanceBuffer);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.DispatchCompute(shadowsCompute, shadowComputeKernel, numTilesX, numTilesY, 1);
// This pass will use the previously generated sample and add it to the integration buffer
cmd.SetRayTracingBufferParam(shadowRayTrace, HDShaderIDs._LightDatas, m_LightLoopLightData.lightData);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RaytracedAreaShadowSample, m_DenoiseBuffer1);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RaytracedAreaShadowIntegration, m_DenoiseBuffer0);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RaytracingDistanceBuffer, m_RaytracingDistanceBuffer);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.DispatchRays(shadowRayTrace, m_RayGenAreaShadowSingleName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
// Let's do the following samples (if any)
for (int sampleIndex = 1; sampleIndex < currentAdditionalLightData.numRayTracingSamples; ++sampleIndex)
{
shadowComputeKernel = shadowsCompute.FindKernel("RaytracingAreaShadowNewSample");
// This pass generates a new sample based on the initial pre-pass
cmd.SetComputeBufferParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._LightDatas, m_LightLoopLightData.lightData);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingTargetAreaLight, lightIdx);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingNumSamples, currentAdditionalLightData.numRayTracingSamples);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingSampleIndex, sampleIndex);
cmd.SetComputeMatrixParam(shadowsCompute, HDShaderIDs._RaytracingAreaWorldToLocal, worldToLocalArea);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[0], m_GbufferManager.GetBuffer(0));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[1], m_GbufferManager.GetBuffer(1));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[2], m_GbufferManager.GetBuffer(2));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[3], m_GbufferManager.GetBuffer(3));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._AreaCookieTextures, m_TextureCaches.areaLightCookieManager.GetTexCache());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedAreaShadowIntegration, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedAreaShadowSample, m_DenoiseBuffer1);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracingDistanceBuffer, m_RaytracingDistanceBuffer);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.DispatchCompute(shadowsCompute, shadowComputeKernel, numTilesX, numTilesY, 1);
// This pass will use the previously generated sample and add it to the integration buffer
cmd.SetRayTracingBufferParam(shadowRayTrace, HDShaderIDs._LightDatas, m_LightLoopLightData.lightData);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RaytracedAreaShadowSample, m_DenoiseBuffer1);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RaytracedAreaShadowIntegration, m_DenoiseBuffer0);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RaytracingDistanceBuffer, m_RaytracingDistanceBuffer);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.DispatchRays(shadowRayTrace, m_RayGenAreaShadowSingleName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
}
}
else
{
// This pass generates the analytic value and will do the full integration
cmd.SetRayTracingBufferParam(shadowRayTrace, HDShaderIDs._LightDatas, m_LightLoopLightData.lightData);
cmd.SetRayTracingIntParam(shadowRayTrace, HDShaderIDs._RaytracingTargetAreaLight, lightIdx);
cmd.SetRayTracingIntParam(shadowRayTrace, HDShaderIDs._RaytracingNumSamples, currentAdditionalLightData.numRayTracingSamples);
cmd.SetRayTracingMatrixParam(shadowRayTrace, HDShaderIDs._RaytracingAreaWorldToLocal, worldToLocalArea);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._GBufferTexture[0], m_GbufferManager.GetBuffer(0));
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._GBufferTexture[1], m_GbufferManager.GetBuffer(1));
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._GBufferTexture[2], m_GbufferManager.GetBuffer(2));
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._GBufferTexture[3], m_GbufferManager.GetBuffer(3));
cmd.SetRayTracingIntParam(shadowRayTrace, HDShaderIDs._RayCountEnabled, m_RayTracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RayCountTexture, m_RayTracingManager.rayCountManager.rayCountTexture);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._AreaCookieTextures, m_TextureCaches.areaLightCookieManager.GetTexCache());
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RaytracedAreaShadowIntegration, m_DenoiseBuffer0);
cmd.DispatchRays(shadowRayTrace, m_RayGenAreaShadowName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
}
}
using (new ProfilingSample(cmd, "Combine Area Shadow", CustomSamplerId.RaytracingShadowCombination.GetSampler()))
{
// Global parameters
cmd.SetComputeIntParam(shadowFilter, HDShaderIDs._RaytracingDenoiseRadius, currentAdditionalLightData.filterSizeTraced);
cmd.SetComputeIntParam(shadowFilter, HDShaderIDs._RaytracingShadowSlot, m_lightList.lights[lightIdx].screenSpaceShadowIndex);
// Apply a vectorized temporal filtering pass and store it back in the denoisebuffer0 with the analytic value in the third channel
var historyScale = new Vector2(hdCamera.actualWidth / (float)shadowHistoryArray.rt.width, hdCamera.actualHeight / (float)shadowHistoryArray.rt.height);
cmd.SetComputeVectorParam(shadowFilter, HDShaderIDs._RTHandleScaleHistory, historyScale);
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._AreaShadowHistory, shadowHistoryArray);
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._AnalyticHistoryBuffer, areaAnalyticHistoryArray);
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._DenoiseOutputTextureRW, m_DenoiseBuffer1);
cmd.DispatchCompute(shadowFilter, applyTAAKernel, numTilesX, numTilesY, 1);
// Update the shadow history buffer
cmd.SetComputeTextureParam(shadowFilter, updateAnalyticHistory, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.SetComputeTextureParam(shadowFilter, updateAnalyticHistory, HDShaderIDs._AnalyticHistoryBuffer, areaAnalyticHistoryArray);
cmd.DispatchCompute(shadowFilter, updateAnalyticHistory, numTilesX, numTilesY, 1);
// Update the analytic history buffer
cmd.SetComputeTextureParam(shadowFilter, updateShadowHistory, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer1);
cmd.SetComputeTextureParam(shadowFilter, updateShadowHistory, HDShaderIDs._AreaShadowHistoryRW, shadowHistoryArray);
cmd.DispatchCompute(shadowFilter, updateShadowHistory, numTilesX, numTilesY, 1);
if (currentAdditionalLightData.filterSizeTraced > 0)
{
// Inject parameters for noise estimation
cmd.SetComputeTextureParam(shadowFilter, estimateNoiseKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowFilter, estimateNoiseKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowFilter, estimateNoiseKernel, HDShaderIDs._ScramblingTexture, m_Asset.renderPipelineResources.textures.scramblingTex);
// Noise estimation pre-pass
cmd.SetComputeTextureParam(shadowFilter, estimateNoiseKernel, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer1);
cmd.SetComputeTextureParam(shadowFilter, estimateNoiseKernel, HDShaderIDs._DenoiseOutputTextureRW, m_DenoiseBuffer0);
cmd.DispatchCompute(shadowFilter, estimateNoiseKernel, numTilesX, numTilesY, 1);
// Reinject parameters for denoising
cmd.SetComputeTextureParam(shadowFilter, firstDenoiseKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowFilter, firstDenoiseKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowFilter, firstDenoiseKernel, HDShaderIDs._ScreenSpaceShadowsTextureRW, m_ScreenSpaceShadowTextureArray);
// First denoising pass
cmd.SetComputeTextureParam(shadowFilter, firstDenoiseKernel, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(shadowFilter, firstDenoiseKernel, HDShaderIDs._DenoiseOutputTextureRW, m_DenoiseBuffer1);
cmd.DispatchCompute(shadowFilter, firstDenoiseKernel, numTilesX, numTilesY, 1);
}
// Re-inject parameters for denoising
cmd.SetComputeTextureParam(shadowFilter, secondDenoiseKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowFilter, secondDenoiseKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowFilter, secondDenoiseKernel, HDShaderIDs._ScreenSpaceShadowsTextureRW, m_ScreenSpaceShadowTextureArray);
// Second (and final) denoising pass
cmd.SetComputeTextureParam(shadowFilter, secondDenoiseKernel, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer1);
cmd.DispatchCompute(shadowFilter, secondDenoiseKernel, numTilesX, numTilesY, 1);
}
}
return(true);
}
void RenderDirectionalLightScreenSpaceShadow(CommandBuffer cmd, HDCamera hdCamera, int frameCount)
{
// Render directional screen space shadow if required
if (m_CurrentSunLightAdditionalLightData != null && m_CurrentSunLightAdditionalLightData.WillRenderScreenSpaceShadow())
{
#if ENABLE_RAYTRACING
// If the shadow is flagged as ray traced, we need to evaluate it completely
if (hdCamera.frameSettings.IsEnabled(FrameSettingsField.RayTracing) && m_CurrentSunLightAdditionalLightData.WillRenderRayTracedShadow())
{
HDRaytracingEnvironment rtEnvironment = m_RayTracingManager.CurrentEnvironment();
ComputeShader shadowsCompute = m_Asset.renderPipelineRayTracingResources.shadowRaytracingCS;
RayTracingShader shadowRayTrace = m_Asset.renderPipelineRayTracingResources.shadowRaytracingRT;
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesX = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesY = (texHeight + (areaTileSize - 1)) / areaTileSize;
int shadowComputeKernel = shadowsCompute.FindKernel("ClearShadowTexture");
cmd.SetComputeBufferParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._LightDatas, m_LightLoopLightData.lightData);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedDirectionalShadowIntegration, m_DenoiseBuffer0);
cmd.DispatchCompute(shadowsCompute, shadowComputeKernel, numTilesX, numTilesY, 1);
cmd.SetGlobalTexture(HDShaderIDs._OwenScrambledRGTexture, m_Asset.renderPipelineResources.textures.owenScrambledRGBATex);
cmd.SetGlobalTexture(HDShaderIDs._OwenScrambledTexture, m_Asset.renderPipelineResources.textures.owenScrambled256Tex);
cmd.SetGlobalTexture(HDShaderIDs._ScramblingTexture, m_Asset.renderPipelineResources.textures.scramblingTex);
for (int i = 0; i < m_CurrentSunLightAdditionalLightData.numRayTracingSamples; ++i)
{
shadowComputeKernel = shadowsCompute.FindKernel("RaytracingDirectionalShadowSample");
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)frameCount % 8;
// This pass evaluates the analytic value and the generates and outputs the first sample
cmd.SetComputeBufferParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._LightDatas, m_LightLoopLightData.lightData);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingFrameIndex, frameIndex);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingNumSamples, m_CurrentSunLightAdditionalLightData.numRayTracingSamples);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingSampleIndex, i);
cmd.SetComputeMatrixParam(shadowsCompute, HDShaderIDs._RaytracingAreaWorldToLocal, worldToLocalArea);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedDirectionalShadowIntegration, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetComputeFloatParam(shadowsCompute, HDShaderIDs._DirectionalLightAngle, m_CurrentSunLightAdditionalLightData.sunLightConeAngle);
cmd.DispatchCompute(shadowsCompute, shadowComputeKernel, numTilesX, numTilesY, 1);
// Grab the acceleration structure for the target camera
RayTracingAccelerationStructure accelerationStructure = m_RayTracingManager.RequestAccelerationStructure(rtEnvironment.shadowLayerMask);
// Define the shader pass to use for the reflection pass
cmd.SetRayTracingShaderPass(shadowRayTrace, "VisibilityDXR");
// Set the acceleration structure for the pass
cmd.SetRayTracingAccelerationStructure(shadowRayTrace, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// This pass will use the previously generated sample and add it to the integration buffer
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RaytracedDirectionalShadowIntegration, m_DenoiseBuffer0);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetRayTracingFloatParam(shadowRayTrace, HDShaderIDs._DirectionalLightAngle, m_CurrentSunLightAdditionalLightData.sunLightConeAngle);
cmd.SetRayTracingIntParam(shadowRayTrace, HDShaderIDs._RaytracingNumSamples, 1);
cmd.DispatchRays(shadowRayTrace, m_RayGenDirectionalShadowSingleName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
}
RTHandle shadowHistoryArray = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedShadow)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedShadow, ShadowHistoryBufferAllocatorFunction, 1);
// Apply the simple denoiser (if required)
if (m_CurrentSunLightAdditionalLightData.filterTracedShadow)
{
HDSimpleDenoiser simpleDenoiser = m_RayTracingManager.GetSimpleDenoiser();
simpleDenoiser.DenoiseBuffer(cmd, hdCamera, m_DenoiseBuffer0, shadowHistoryArray, m_DenoiseBuffer1, m_CurrentSunLightAdditionalLightData.filterSizeTraced, singleChannel: true, slotIndex: m_CurrentSunLightDirectionalLightData.screenSpaceShadowIndex);
}
else
{
HDUtils.BlitCameraTexture(cmd, m_DenoiseBuffer0, m_DenoiseBuffer1);
}
shadowComputeKernel = shadowsCompute.FindKernel("OutputShadowTexture");
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedDirectionalShadowIntegration, m_DenoiseBuffer1);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._ScreenSpaceShadowsTextureRW, m_ScreenSpaceShadowTextureArray);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingShadowSlot, m_CurrentSunLightDirectionalLightData.screenSpaceShadowIndex);
cmd.DispatchCompute(shadowsCompute, shadowComputeKernel, numTilesX, numTilesY, 1);
}
else
#endif
{
// If it is screen space but not ray traced, then we can rely on the shadow map
CoreUtils.SetRenderTarget(cmd, m_ScreenSpaceShadowTextureArray, depthSlice: m_CurrentSunLightDirectionalLightData.screenSpaceShadowIndex);
HDUtils.DrawFullScreen(cmd, s_ScreenSpaceShadowsMat, m_ScreenSpaceShadowTextureArray);
}
}
}
bool RenderLightScreenSpaceShadows(HDCamera hdCamera, CommandBuffer cmd)
{
// Fetch the ray tracing environment
HDRaytracingEnvironment rtEnvironment = m_RayTracingManager.CurrentEnvironment();
// If invalid state, we stop right away
if (!hdCamera.frameSettings.IsEnabled(FrameSettingsField.RayTracing) || rtEnvironment == null)
{
return(false);
}
// Grab the history buffer
RTHandle shadowHistoryArray = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedShadow)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedShadow, ShadowHistoryBufferAllocatorFunction, 1);
// Grab the acceleration structure for the target camera
RayTracingAccelerationStructure accelerationStructure = m_RayTracingManager.RequestAccelerationStructure(rtEnvironment.shadowLayerMask);
// Set the acceleration structure for the pass
cmd.SetRayTracingAccelerationStructure(m_ScreenSpaceShadowsRT, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Define the shader pass to use for the reflection pass
cmd.SetRayTracingShaderPass(m_ScreenSpaceShadowsRT, "VisibilityDXR");
// Inject the ray-tracing sampling data
m_BlueNoise.BindDitheredRNGData8SPP(cmd);
// Compute and inject the frame data
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)m_FrameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironment.rayBias);
using (new ProfilingSample(cmd, "Ray Traced Shadows", CustomSamplerId.RaytracingShadowIntegration.GetSampler()))
{
// Loop through all the potential screen space light shadows
for (int lightIdx = 0; lightIdx < m_ScreenSpaceShadowIndex; ++lightIdx)
{
// This matches the directional light
if (!m_CurrentScreenSpaceShadowData[lightIdx].valid)
{
continue;
}
// Fetch the light data and additional light data
LightData currentLight = m_lightList.lights[m_CurrentScreenSpaceShadowData[lightIdx].lightDataIndex];
HDAdditionalLightData currentAdditionalLightData = m_CurrentScreenSpaceShadowData[lightIdx].additionalLightData;
// Trigger the right algorithm based on the light type
switch (currentLight.lightType)
{
case GPULightType.Rectangle:
{
RenderAreaScreenSpaceShadow(cmd, hdCamera, rtEnvironment, currentLight, currentAdditionalLightData, m_CurrentScreenSpaceShadowData[lightIdx].lightDataIndex, shadowHistoryArray);
}
break;
case GPULightType.Point:
{
RenderPunctualScreenSpaceShadow(cmd, hdCamera, rtEnvironment, currentLight, currentAdditionalLightData, m_CurrentScreenSpaceShadowData[lightIdx].lightDataIndex, shadowHistoryArray);
}
break;
}
}
}
return(true);
}
void RenderDirectionalLightScreenSpaceShadow(CommandBuffer cmd, HDCamera hdCamera)
{
// Render directional screen space shadow if required
if (m_CurrentSunLightAdditionalLightData != null && m_CurrentSunLightAdditionalLightData.WillRenderScreenSpaceShadow())
{
#if ENABLE_RAYTRACING
// Grab the ray tracing environment
HDRaytracingEnvironment rtEnvironment = m_RayTracingManager.CurrentEnvironment();
// If the shadow is flagged as ray traced, we need to evaluate it completely
if (rtEnvironment != null && hdCamera.frameSettings.IsEnabled(FrameSettingsField.RayTracing) &&
m_CurrentSunLightAdditionalLightData.WillRenderRayTracedShadow())
{
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesX = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesY = (texHeight + (areaTileSize - 1)) / areaTileSize;
// Clear the integration texture
cmd.SetComputeTextureParam(m_ScreenSpaceShadowsCS, m_ClearShadowTexture, HDShaderIDs._RaytracedDirectionalShadowIntegration, m_ShadowIntermediateBufferRGBA0);
cmd.DispatchCompute(m_ScreenSpaceShadowsCS, m_ClearShadowTexture, numTilesX, numTilesY, hdCamera.viewCount);
// Grab and bind the acceleration structure for the target camera
RayTracingAccelerationStructure accelerationStructure = m_RayTracingManager.RequestAccelerationStructure(rtEnvironment.shadowLayerMask);
cmd.SetRayTracingAccelerationStructure(m_ScreenSpaceShadowsRT, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
m_BlueNoise.BindDitheredRNGData8SPP(cmd);
// Compute the current frame index
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)m_FrameCount % 8;
cmd.SetComputeIntParam(m_ScreenSpaceShadowsCS, HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironment.rayBias);
// Loop through the samples of this frame
for (int sampleIdx = 0; sampleIdx < m_CurrentSunLightAdditionalLightData.numRayTracingSamples; ++sampleIdx)
{
// Bind the light & sampling data
cmd.SetComputeBufferParam(m_ScreenSpaceShadowsCS, m_RaytracingDirectionalShadowSample, HDShaderIDs._DirectionalLightDatas, m_LightLoopLightData.directionalLightData);
cmd.SetComputeIntParam(m_ScreenSpaceShadowsCS, HDShaderIDs._DirectionalShadowIndex, m_CurrentShadowSortedSunLightIndex);
cmd.SetComputeFloatParam(m_ScreenSpaceShadowsCS, HDShaderIDs._DirectionalLightAngle, m_CurrentSunLightAdditionalLightData.sunLightConeAngle);
cmd.SetComputeIntParam(m_ScreenSpaceShadowsCS, HDShaderIDs._RaytracingSampleIndex, sampleIdx);
cmd.SetComputeIntParam(m_ScreenSpaceShadowsCS, HDShaderIDs._RaytracingNumSamples, m_CurrentSunLightAdditionalLightData.numRayTracingSamples);
// Input Buffer
cmd.SetComputeTextureParam(m_ScreenSpaceShadowsCS, m_RaytracingDirectionalShadowSample, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(m_ScreenSpaceShadowsCS, m_RaytracingDirectionalShadowSample, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
// Output buffer
cmd.SetComputeTextureParam(m_ScreenSpaceShadowsCS, m_RaytracingDirectionalShadowSample, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
// Generate a new direction
cmd.DispatchCompute(m_ScreenSpaceShadowsCS, m_RaytracingDirectionalShadowSample, numTilesX, numTilesY, hdCamera.viewCount);
// Define the shader pass to use for the shadow pass
cmd.SetRayTracingShaderPass(m_ScreenSpaceShadowsRT, "VisibilityDXR");
// Set ray count texture
cmd.SetRayTracingIntParam(m_ScreenSpaceShadowsRT, HDShaderIDs._RayCountEnabled, m_RayTracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRayTracingTextureParam(m_ScreenSpaceShadowsRT, HDShaderIDs._RayCountTexture, m_RayTracingManager.rayCountManager.GetRayCountTexture());
// Input buffers
cmd.SetRayTracingTextureParam(m_ScreenSpaceShadowsRT, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(m_ScreenSpaceShadowsRT, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetRayTracingTextureParam(m_ScreenSpaceShadowsRT, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetRayTracingIntParam(m_ScreenSpaceShadowsRT, HDShaderIDs._RaytracingNumSamples, m_CurrentSunLightAdditionalLightData.numRayTracingSamples);
// Output buffer
cmd.SetRayTracingTextureParam(m_ScreenSpaceShadowsRT, HDShaderIDs._RaytracedDirectionalShadowIntegration, m_ShadowIntermediateBufferRGBA0);
// Evaluate the visibility
cmd.DispatchRays(m_ScreenSpaceShadowsRT, m_RayGenDirectionalShadowSingleName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, (uint)hdCamera.viewCount);
}
// Grab the history buffer for shadows
RTHandle shadowHistoryArray = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedShadow)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedShadow, ShadowHistoryBufferAllocatorFunction, 1);
// Apply the simple denoiser (if required)
if (m_CurrentSunLightAdditionalLightData.filterTracedShadow)
{
// Apply the temporal denoiser
HDTemporalFilter temporalFilter = m_RayTracingManager.GetTemporalFilter();
temporalFilter.DenoiseBuffer(cmd, hdCamera, m_ShadowIntermediateBufferRGBA0, shadowHistoryArray, m_ShadowIntermediateBufferRGBA1, singleChannel: true, slotIndex: m_CurrentSunLightDirectionalLightData.screenSpaceShadowIndex);
// Apply the spatial denoiser
HDSimpleDenoiser simpleDenoiser = m_RayTracingManager.GetSimpleDenoiser();
simpleDenoiser.DenoiseBufferNoHistory(cmd, hdCamera, m_ShadowIntermediateBufferRGBA1, m_ShadowIntermediateBufferRGBA0, m_CurrentSunLightAdditionalLightData.filterSizeTraced, singleChannel: true);
}
cmd.SetComputeTextureParam(m_ScreenSpaceShadowsCS, m_OutputShadowTextureKernel, HDShaderIDs._RaytracedDirectionalShadowIntegration, m_ShadowIntermediateBufferRGBA0);
cmd.SetComputeTextureParam(m_ScreenSpaceShadowsCS, m_OutputShadowTextureKernel, HDShaderIDs._ScreenSpaceShadowsTextureRW, m_ScreenSpaceShadowTextureArray);
cmd.SetComputeIntParam(m_ScreenSpaceShadowsCS, HDShaderIDs._RaytracingShadowSlot, m_CurrentSunLightDirectionalLightData.screenSpaceShadowIndex);
cmd.DispatchCompute(m_ScreenSpaceShadowsCS, m_OutputShadowTextureKernel, numTilesX, numTilesY, hdCamera.viewCount);
}
else
#endif
{
// If it is screen space but not ray traced, then we can rely on the shadow map
CoreUtils.SetRenderTarget(cmd, m_ScreenSpaceShadowTextureArray, depthSlice: m_CurrentSunLightDirectionalLightData.screenSpaceShadowIndex);
HDUtils.DrawFullScreen(cmd, s_ScreenSpaceShadowsMat, m_ScreenSpaceShadowTextureArray);
}
}
}
