DeferredLightingRTParameters PrepareIndirectDiffuseDeferredLightingRTParameters(HDCamera hdCamera)
{
DeferredLightingRTParameters deferredParameters = new DeferredLightingRTParameters();
// Fetch the GI volume component
var settings = hdCamera.volumeStack.GetComponent <GlobalIllumination>();
RayTracingSettings rTSettings = hdCamera.volumeStack.GetComponent <RayTracingSettings>();
// Make sure the binning buffer has the right size
CheckBinningBuffersSize(hdCamera);
// Generic attributes
deferredParameters.rayBinning = true;
deferredParameters.layerMask.value = (int)RayTracingRendererFlag.GlobalIllumination;
deferredParameters.diffuseLightingOnly = true;
deferredParameters.halfResolution = !settings.fullResolution;
deferredParameters.rayCountType = (int)RayCountValues.DiffuseGI_Deferred;
deferredParameters.lodBias = settings.textureLodBias.value;
// Ray marching
deferredParameters.mixedTracing = settings.tracing.value == RayCastingMode.Mixed && hdCamera.frameSettings.litShaderMode == LitShaderMode.Deferred;
deferredParameters.raySteps = settings.maxMixedRaySteps;
deferredParameters.nearClipPlane = hdCamera.camera.nearClipPlane;
deferredParameters.farClipPlane = hdCamera.camera.farClipPlane;
// Camera data
deferredParameters.width = hdCamera.actualWidth;
deferredParameters.height = hdCamera.actualHeight;
deferredParameters.viewCount = hdCamera.viewCount;
// Compute buffers
deferredParameters.rayBinResult = m_RayBinResult;
deferredParameters.rayBinSizeResult = m_RayBinSizeResult;
deferredParameters.accelerationStructure = RequestAccelerationStructure();
deferredParameters.lightCluster = RequestLightCluster();
deferredParameters.mipChainBuffer = m_DepthBufferMipChainInfo.GetOffsetBufferData(m_DepthPyramidMipLevelOffsetsBuffer);
// Shaders
deferredParameters.rayMarchingCS = m_GlobalSettings.renderPipelineRayTracingResources.rayMarchingCS;
deferredParameters.gBufferRaytracingRT = m_GlobalSettings.renderPipelineRayTracingResources.gBufferRaytracingRT;
deferredParameters.deferredRaytracingCS = m_GlobalSettings.renderPipelineRayTracingResources.deferredRaytracingCS;
deferredParameters.rayBinningCS = m_GlobalSettings.renderPipelineRayTracingResources.rayBinningCS;
// XRTODO: add ray binning support for single-pass
if (deferredParameters.viewCount > 1 && deferredParameters.rayBinning)
{
deferredParameters.rayBinning = false;
}
// Make a copy of the previous values that were defined in the CB
deferredParameters.raytracingCB = m_ShaderVariablesRayTracingCB;
// Override the ones we need to
deferredParameters.raytracingCB._RaytracingRayMaxLength = settings.rayLength;
deferredParameters.raytracingCB._RaytracingIntensityClamp = settings.clampValue;
deferredParameters.raytracingCB._RaytracingIncludeSky = 1;
deferredParameters.raytracingCB._RaytracingPreExposition = 1;
deferredParameters.raytracingCB._RayTracingDiffuseLightingOnly = 1;
return(deferredParameters);
}
RTShadowDirectionalTraceParameters PrepareRTShadowDirectionalTraceParameters(HDCamera hdCamera, HDAdditionalLightData additionalLightData)
{
RTShadowDirectionalTraceParameters rtsdtParams = new RTShadowDirectionalTraceParameters();
RayTracingSettings rayTracingSettings = hdCamera.volumeStack.GetComponent <RayTracingSettings>();
// Set the camera parameters
rtsdtParams.texWidth = hdCamera.actualWidth;
rtsdtParams.texHeight = hdCamera.actualHeight;
rtsdtParams.viewCount = hdCamera.viewCount;
// Evaluation parameters
rtsdtParams.softShadow = additionalLightData.angularDiameter > 0.0 ? true : false;
// If the surface is infinitively small, we force it to one sample.
rtsdtParams.numShadowSamples = rtsdtParams.softShadow ? additionalLightData.numRayTracingSamples : 1;
rtsdtParams.colorShadow = m_CurrentSunLightAdditionalLightData.colorShadow;
rtsdtParams.maxShadowLength = rayTracingSettings.directionalShadowRayLength.value;
// Kernels
rtsdtParams.clearShadowKernel = m_ClearShadowTexture;
rtsdtParams.directionalShadowSample = m_RaytracingDirectionalShadowSample;
// Grab the acceleration structure for the target camera
rtsdtParams.accelerationStructure = RequestAccelerationStructure();
rtsdtParams.screenSpaceShadowCS = m_ScreenSpaceShadowsCS;
rtsdtParams.screenSpaceShadowRT = m_ScreenSpaceShadowsRT;
rtsdtParams.shaderVariablesRayTracingCB = m_ShaderVariablesRayTracingCB;
BlueNoise blueNoise = GetBlueNoiseManager();
rtsdtParams.ditheredTextureSet = blueNoise.DitheredTextureSet8SPP();
return(rtsdtParams);
}
void RenderReflectionsQuality(HDCamera hdCamera, CommandBuffer cmd, RTHandle outputTexture, ScriptableRenderContext renderContext, int frameCount)
{
// Fetch the shaders that we will be using
ComputeShader reflectionFilter = m_Asset.renderPipelineRayTracingResources.reflectionBilateralFilterCS;
RayTracingShader reflectionShader = m_Asset.renderPipelineRayTracingResources.reflectionRaytracingRT;
// Request the buffers we shall be using
RTHandle intermediateBuffer0 = GetRayTracingBuffer(InternalRayTracingBuffers.RGBA0);
RTHandle intermediateBuffer1 = GetRayTracingBuffer(InternalRayTracingBuffers.RGBA1);
var settings = hdCamera.volumeStack.GetComponent <ScreenSpaceReflection>();
LightCluster lightClusterSettings = hdCamera.volumeStack.GetComponent <LightCluster>();
RayTracingSettings rtSettings = hdCamera.volumeStack.GetComponent <RayTracingSettings>();
using (new ProfilingScope(cmd, ProfilingSampler.Get(HDProfileId.RaytracingIntegrateReflection)))
{
// Bind all the required data for ray tracing
BindRayTracedReflectionData(cmd, hdCamera, reflectionShader, settings, lightClusterSettings, rtSettings, intermediateBuffer0, intermediateBuffer1);
// Only use the shader variant that has multi bounce if the bounce count > 1
CoreUtils.SetKeyword(cmd, "MULTI_BOUNCE_INDIRECT", settings.bounceCount.value > 1);
// We are not in the diffuse only case
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTING_ONLY", false);
// Run the computation
cmd.DispatchRays(reflectionShader, m_RayGenIntegrationName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, (uint)hdCamera.viewCount);
// Disable multi-bounce
CoreUtils.SetKeyword(cmd, "MULTI_BOUNCE_INDIRECT", false);
}
using (new ProfilingScope(cmd, ProfilingSampler.Get(HDProfileId.RaytracingFilterReflection)))
{
if (settings.denoise.value)
{
// Grab the history buffer
RTHandle reflectionHistory = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedReflection)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedReflection, ReflectionHistoryBufferAllocatorFunction, 1);
float historyValidity = 1.0f;
#if UNITY_HDRP_DXR_TESTS_DEFINE
if (Application.isPlaying)
{
historyValidity = 0.0f;
}
else
#endif
// We need to check if something invalidated the history buffers
historyValidity *= ValidRayTracingHistory(hdCamera) ? 1.0f : 0.0f;
HDReflectionDenoiser reflectionDenoiser = GetReflectionDenoiser();
reflectionDenoiser.DenoiseBuffer(cmd, hdCamera, settings.denoiserRadius.value, intermediateBuffer0, reflectionHistory, outputTexture, historyValidity: historyValidity);
}
else
{
HDUtils.BlitCameraTexture(cmd, intermediateBuffer0, outputTexture);
}
}
}
public void RenderIndirectDiffuseT2(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, int frameCount)
{
// First thing to check is: Do we have a valid ray-tracing environment?
GlobalIllumination giSettings = VolumeManager.instance.stack.GetComponent <GlobalIllumination>();
LightCluster lightClusterSettings = VolumeManager.instance.stack.GetComponent <LightCluster>();
RayTracingSettings rtSettings = VolumeManager.instance.stack.GetComponent <RayTracingSettings>();
// Shaders that are used
RayTracingShader indirectDiffuseRT = m_Asset.renderPipelineRayTracingResources.indirectDiffuseRaytracingRT;
BindRayTracedIndirectDiffuseData(cmd, hdCamera, indirectDiffuseRT, giSettings, lightClusterSettings, rtSettings);
// Compute the actual resolution that is needed base on the quality
int widthResolution = hdCamera.actualWidth;
int heightResolution = hdCamera.actualHeight;
// Only use the shader variant that has multi bounce if the bounce count > 1
CoreUtils.SetKeyword(cmd, "MULTI_BOUNCE_INDIRECT", giSettings.bounceCount.value > 1);
// Run the computation
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTING_ONLY", true);
cmd.DispatchRays(indirectDiffuseRT, m_RayGenIndirectDiffuseIntegrationName, (uint)widthResolution, (uint)heightResolution, (uint)hdCamera.viewCount);
// Disable the keywords we do not need anymore
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTING_ONLY", false);
CoreUtils.SetKeyword(cmd, "MULTI_BOUNCE_INDIRECT", false);
using (new ProfilingSample(cmd, "Filter Indirect Diffuse", CustomSamplerId.RaytracingFilterIndirectDiffuse.GetSampler()))
{
if (giSettings.denoise.value)
{
DenoiseIndirectDiffuseBuffer(hdCamera, cmd, giSettings);
}
}
}
DeferredLightingRTParameters PrepareReflectionDeferredLightingRTParameters(HDCamera hdCamera, bool fullResolution, bool transparent)
{
DeferredLightingRTParameters deferredParameters = new DeferredLightingRTParameters();
// Fetch the GI volume component
var settings = hdCamera.volumeStack.GetComponent <ScreenSpaceReflection>();
RayTracingSettings rTSettings = hdCamera.volumeStack.GetComponent <RayTracingSettings>();
// Make sure the binning buffer has the right size
CheckBinningBuffersSize(hdCamera);
// Generic attributes
deferredParameters.rayBinning = true;
deferredParameters.layerMask.value = (int)RayTracingRendererFlag.Reflection;
deferredParameters.diffuseLightingOnly = false;
deferredParameters.halfResolution = !fullResolution;
deferredParameters.rayCountType = (int)RayCountValues.ReflectionDeferred;
deferredParameters.lodBias = settings.textureLodBias.value;
deferredParameters.rayMiss = (int)(settings.rayMiss.value);
deferredParameters.lastBounceFallbackHierarchy = (int)(settings.lastBounceFallbackHierarchy.value);
// Ray Marching parameters
deferredParameters.mixedTracing = (settings.tracing.value == RayCastingMode.Mixed && hdCamera.frameSettings.litShaderMode == LitShaderMode.Deferred) && !transparent;
deferredParameters.raySteps = settings.rayMaxIterationsRT;
deferredParameters.nearClipPlane = hdCamera.camera.nearClipPlane;
deferredParameters.farClipPlane = hdCamera.camera.farClipPlane;
// Camera data
deferredParameters.width = hdCamera.actualWidth;
deferredParameters.height = hdCamera.actualHeight;
deferredParameters.viewCount = hdCamera.viewCount;
// Compute buffers
deferredParameters.rayBinResult = m_RayBinResult;
deferredParameters.rayBinSizeResult = m_RayBinSizeResult;
deferredParameters.accelerationStructure = RequestAccelerationStructure(hdCamera);
deferredParameters.lightCluster = RequestLightCluster();
deferredParameters.mipChainBuffer = hdCamera.depthBufferMipChainInfo.GetOffsetBufferData(m_DepthPyramidMipLevelOffsetsBuffer);
// Shaders
deferredParameters.rayMarchingCS = m_GlobalSettings.renderPipelineRayTracingResources.rayMarchingCS;
deferredParameters.gBufferRaytracingRT = m_GlobalSettings.renderPipelineRayTracingResources.gBufferRaytracingRT;
deferredParameters.deferredRaytracingCS = m_GlobalSettings.renderPipelineRayTracingResources.deferredRaytracingCS;
deferredParameters.rayBinningCS = m_GlobalSettings.renderPipelineRayTracingResources.rayBinningCS;
// Make a copy of the previous values that were defined in the CB
deferredParameters.raytracingCB = m_ShaderVariablesRayTracingCB;
// Override the ones we need to
deferredParameters.raytracingCB._RaytracingRayMaxLength = settings.rayLength;
deferredParameters.raytracingCB._RaytracingIntensityClamp = settings.clampValue;
deferredParameters.raytracingCB._RaytracingPreExposition = 0;
deferredParameters.raytracingCB._RayTracingDiffuseLightingOnly = 0;
deferredParameters.raytracingCB._RayTracingRayMissFallbackHierarchy = deferredParameters.rayMiss;
deferredParameters.raytracingCB._RayTracingLastBounceFallbackHierarchy = deferredParameters.lastBounceFallbackHierarchy;
return(deferredParameters);
}
DeferredLightingRTParameters PrepareReflectionDeferredLightingRTParameters(HDCamera hdCamera)
{
DeferredLightingRTParameters deferredParameters = new DeferredLightingRTParameters();
// Fetch the GI volume component
var settings = hdCamera.volumeStack.GetComponent <ScreenSpaceReflection>();
RayTracingSettings rTSettings = hdCamera.volumeStack.GetComponent <RayTracingSettings>();
// Make sure the binning buffer has the right size
CheckBinningBuffersSize(hdCamera);
// Generic attributes
deferredParameters.rayBinning = true;
deferredParameters.layerMask.value = (int)RayTracingRendererFlag.Reflection;
deferredParameters.diffuseLightingOnly = false;
deferredParameters.halfResolution = !settings.fullResolution;
deferredParameters.rayCountType = (int)RayCountValues.ReflectionDeferred;
deferredParameters.lodBias = settings.textureLodBias.value;
// Camera data
deferredParameters.width = hdCamera.actualWidth;
deferredParameters.height = hdCamera.actualHeight;
deferredParameters.viewCount = hdCamera.viewCount;
// Compute buffers
deferredParameters.rayBinResult = m_RayBinResult;
deferredParameters.rayBinSizeResult = m_RayBinSizeResult;
deferredParameters.accelerationStructure = RequestAccelerationStructure();
deferredParameters.lightCluster = RequestLightCluster();
// Shaders
deferredParameters.gBufferRaytracingRT = m_GlobalSettings.renderPipelineRayTracingResources.gBufferRaytracingRT;
deferredParameters.deferredRaytracingCS = m_GlobalSettings.renderPipelineRayTracingResources.deferredRaytracingCS;
deferredParameters.rayBinningCS = m_GlobalSettings.renderPipelineRayTracingResources.rayBinningCS;
// XRTODO: add ray binning support for single-pass
if (deferredParameters.viewCount > 1 && deferredParameters.rayBinning)
{
deferredParameters.rayBinning = false;
}
// Make a copy of the previous values that were defined in the CB
deferredParameters.raytracingCB = m_ShaderVariablesRayTracingCB;
// Override the ones we need to
deferredParameters.raytracingCB._RaytracingRayMaxLength = settings.rayLength;
deferredParameters.raytracingCB._RaytracingIntensityClamp = settings.clampValue;
deferredParameters.raytracingCB._RaytracingIncludeSky = settings.reflectSky.value ? 1 : 0;
deferredParameters.raytracingCB._RaytracingPreExposition = 0;
deferredParameters.raytracingCB._RayTracingDiffuseLightingOnly = 0;
return(deferredParameters);
}
DeferredLightingRTParameters PrepareIndirectDiffuseDeferredLightingRTParameters(HDCamera hdCamera)
{
DeferredLightingRTParameters deferredParameters = new DeferredLightingRTParameters();
// Fetch the GI volume component
var settings = hdCamera.volumeStack.GetComponent <GlobalIllumination>();
RayTracingSettings rTSettings = hdCamera.volumeStack.GetComponent <RayTracingSettings>();
// Make sure the binning buffer has the right size
CheckBinningBuffersSize(hdCamera);
// Generic attributes
deferredParameters.rayBinning = true;
deferredParameters.layerMask.value = (int)RayTracingRendererFlag.GlobalIllumination;
deferredParameters.diffuseLightingOnly = true;
deferredParameters.halfResolution = false;
deferredParameters.rayCountType = (int)RayCountValues.DiffuseGI_Deferred;
// Camera data
deferredParameters.width = hdCamera.actualWidth;
deferredParameters.height = hdCamera.actualHeight;
deferredParameters.viewCount = hdCamera.viewCount;
// Compute buffers
deferredParameters.rayBinResult = m_RayBinResult;
deferredParameters.rayBinSizeResult = m_RayBinSizeResult;
deferredParameters.accelerationStructure = RequestAccelerationStructure();
deferredParameters.lightCluster = RequestLightCluster();
// Shaders
deferredParameters.gBufferRaytracingRT = m_Asset.renderPipelineRayTracingResources.gBufferRaytracingRT;
deferredParameters.deferredRaytracingCS = m_Asset.renderPipelineRayTracingResources.deferredRaytracingCS;
deferredParameters.rayBinningCS = m_Asset.renderPipelineRayTracingResources.rayBinningCS;
// XRTODO: add ray binning support for single-pass
if (deferredParameters.viewCount > 1 && deferredParameters.rayBinning)
{
deferredParameters.rayBinning = false;
Debug.LogWarning("Ray binning is not supported with XR single-pass rendering!");
}
deferredParameters.globalCB = m_ShaderVariablesRayTracingCB;
deferredParameters.globalCB._RaytracingIntensityClamp = settings.clampValue.value;
deferredParameters.globalCB._RaytracingPreExposition = 1;
deferredParameters.globalCB._RaytracingDiffuseRay = 1;
deferredParameters.globalCB._RaytracingIncludeSky = 1;
deferredParameters.globalCB._RaytracingRayMaxLength = settings.rayLength.value;
deferredParameters.globalCB._RayTracingDiffuseLightingOnly = deferredParameters.diffuseLightingOnly ? 1 : 0;
return(deferredParameters);
}
DeferredLightingRTParameters PrepareIndirectDiffuseDeferredLightingRTParameters(HDCamera hdCamera)
{
DeferredLightingRTParameters deferredParameters = new DeferredLightingRTParameters();
// Fetch the GI volume component
var settings = VolumeManager.instance.stack.GetComponent <GlobalIllumination>();
RayTracingSettings rTSettings = VolumeManager.instance.stack.GetComponent <RayTracingSettings>();
// Make sure the binning buffer has the right size
CheckBinningBuffersSize(hdCamera);
// Generic attributes
deferredParameters.rayBinning = settings.rayBinning.value;
deferredParameters.layerMask.value = (int)RayTracingRendererFlag.GlobalIllumination;
deferredParameters.rayBias = rTSettings.rayBias.value;
deferredParameters.maxRayLength = settings.rayLength.value;
deferredParameters.clampValue = settings.clampValue.value;
deferredParameters.includeSky = true;
deferredParameters.diffuseLightingOnly = true;
deferredParameters.halfResolution = false;
deferredParameters.rayCountFlag = m_RayCountManager.RayCountIsEnabled();
deferredParameters.rayCountType = (int)RayCountValues.DiffuseGI_Deferred;
deferredParameters.preExpose = true;
// Camera data
deferredParameters.width = hdCamera.actualWidth;
deferredParameters.height = hdCamera.actualHeight;
deferredParameters.viewCount = hdCamera.viewCount;
deferredParameters.fov = hdCamera.camera.fieldOfView;
// Compute buffers
deferredParameters.rayBinResult = m_RayBinResult;
deferredParameters.rayBinSizeResult = m_RayBinSizeResult;
deferredParameters.accelerationStructure = RequestAccelerationStructure();
deferredParameters.lightCluster = RequestLightCluster();
// Shaders
deferredParameters.gBufferRaytracingRT = m_Asset.renderPipelineRayTracingResources.gBufferRaytracingRT;
deferredParameters.deferredRaytracingCS = m_Asset.renderPipelineRayTracingResources.deferredRaytracingCS;
deferredParameters.rayBinningCS = m_Asset.renderPipelineRayTracingResources.rayBinningCS;
// XRTODO: add ray binning support for single-pass
if (deferredParameters.viewCount > 1 && deferredParameters.rayBinning)
{
deferredParameters.rayBinning = false;
Debug.LogWarning("Ray binning is not supported with XR single-pass rendering!");
}
return(deferredParameters);
}
internal void ResetMaterialDirtiness(HDCamera hdCamera)
{
RayTracingSettings rtSettings = hdCamera.volumeStack.GetComponent <RayTracingSettings>();
#if UNITY_EDITOR
if (rtSettings.buildMode.value == RTASBuildMode.Automatic || hdCamera.camera.cameraType == CameraType.SceneView)
#else
if (rtSettings.buildMode.value == RTASBuildMode.Automatic)
#endif
{
m_RTASManager.materialsDirty = false;
}
else
{
hdCamera.materialsDirty = false;
}
}
internal bool GetTransformDirtiness(HDCamera hdCamera)
{
RayTracingSettings rtSettings = hdCamera.volumeStack.GetComponent <RayTracingSettings>();
#if UNITY_EDITOR
if (rtSettings.buildMode.value == RTASBuildMode.Automatic || hdCamera.camera.cameraType == CameraType.SceneView)
#else
if (rtSettings.buildMode.value == RTASBuildMode.Automatic)
#endif
{
return(m_RTASManager.transformsDirty);
}
else
{
return(hdCamera.transformsDirty);
}
}
void RenderReflectionsT2(HDCamera hdCamera, CommandBuffer cmd, RTHandle outputTexture, ScriptableRenderContext renderContext, int frameCount)
{
// Fetch the shaders that we will be using
ComputeShader reflectionFilter = m_Asset.renderPipelineRayTracingResources.reflectionBilateralFilterCS;
RayTracingShader reflectionShader = m_Asset.renderPipelineRayTracingResources.reflectionRaytracingRT;
var settings = VolumeManager.instance.stack.GetComponent <ScreenSpaceReflection>();
LightCluster lightClusterSettings = VolumeManager.instance.stack.GetComponent <LightCluster>();
RayTracingSettings rtSettings = VolumeManager.instance.stack.GetComponent <RayTracingSettings>();
using (new ProfilingSample(cmd, "Ray Traced Reflection", CustomSamplerId.RaytracingIntegrateReflection.GetSampler()))
{
// Bind all the required data for ray tracing
BindRayTracedReflectionData(cmd, hdCamera, reflectionShader, settings, lightClusterSettings, rtSettings);
// Only use the shader variant that has multi bounce if the bounce count > 1
CoreUtils.SetKeyword(cmd, "MULTI_BOUNCE_INDIRECT", settings.bounceCount.value > 1);
// We are not in the diffuse only case
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTING_ONLY", false);
// Run the computation
cmd.DispatchRays(reflectionShader, m_RayGenIntegrationName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, (uint)hdCamera.viewCount);
// Disable multi-bounce
CoreUtils.SetKeyword(cmd, "MULTI_BOUNCE_INDIRECT", false);
}
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, m_ReflIntermediateTexture0, reflectionHistory, outputTexture, settings.denoiserRadius.value, singleChannel: false);
}
else
{
HDUtils.BlitCameraTexture(cmd, m_ReflIntermediateTexture0, outputTexture);
}
}
}
internal RayTracingAccelerationStructure RequestAccelerationStructure(HDCamera hdCamera)
{
if (m_ValidRayTracingState)
{
RayTracingSettings rtSettings = hdCamera.volumeStack.GetComponent <RayTracingSettings>();
#if UNITY_EDITOR
if (rtSettings.buildMode.value == RTASBuildMode.Automatic || hdCamera.camera.cameraType == CameraType.SceneView)
#else
if (rtSettings.buildMode.value == RTASBuildMode.Automatic)
#endif
{ return(m_RTASManager.rtas); }
else
{
return(hdCamera.rayTracingAccelerationStructure);
}
}
return(null);
}
void RenderIndirectDiffuseQuality(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, int frameCount)
{
// First thing to check is: Do we have a valid ray-tracing environment?
GlobalIllumination giSettings = hdCamera.volumeStack.GetComponent <GlobalIllumination>();
LightCluster lightClusterSettings = hdCamera.volumeStack.GetComponent <LightCluster>();
RayTracingSettings rtSettings = hdCamera.volumeStack.GetComponent <RayTracingSettings>();
// Shaders that are used
RayTracingShader indirectDiffuseRT = m_Asset.renderPipelineRayTracingResources.indirectDiffuseRaytracingRT;
// Request the intermediate texture we will be using
RTHandle intermediateBuffer1 = GetRayTracingBuffer(InternalRayTracingBuffers.RGBA1);
// Bind all the parameters for ray tracing
BindRayTracedIndirectDiffuseData(cmd, hdCamera, indirectDiffuseRT, giSettings, lightClusterSettings, rtSettings, m_IndirectDiffuseBuffer, intermediateBuffer1);
// Compute the actual resolution that is needed base on the quality
int widthResolution = hdCamera.actualWidth;
int heightResolution = hdCamera.actualHeight;
// Only use the shader variant that has multi bounce if the bounce count > 1
CoreUtils.SetKeyword(cmd, "MULTI_BOUNCE_INDIRECT", giSettings.bounceCount.value > 1);
// Run the computation
cmd.SetGlobalInt(HDShaderIDs._RayTracingDiffuseLightingOnly, 1);
cmd.DispatchRays(indirectDiffuseRT, m_RayGenIndirectDiffuseIntegrationName, (uint)widthResolution, (uint)heightResolution, (uint)hdCamera.viewCount);
// Disable the keywords we do not need anymore
CoreUtils.SetKeyword(cmd, "MULTI_BOUNCE_INDIRECT", false);
using (new ProfilingScope(cmd, ProfilingSampler.Get(HDProfileId.RaytracingFilterIndirectDiffuse)))
{
if (giSettings.denoise.value)
{
DenoiseIndirectDiffuseBuffer(hdCamera, cmd, giSettings);
}
}
}
void RenderSubsurfaceScattering(HDCamera hdCamera, CommandBuffer cmd, RTHandle colorBufferRT,
RTHandle diffuseBufferRT, RTHandle depthStencilBufferRT, RTHandle depthTextureRT)
{
if (!hdCamera.frameSettings.IsEnabled(FrameSettingsField.SubsurfaceScattering))
{
return;
}
BuildCoarseStencilAndResolveIfNeeded(hdCamera, cmd);
var settings = hdCamera.volumeStack.GetComponent <SubSurfaceScattering>();
// If ray tracing is enabled for the camera, if the volume override is active and if the RAS is built, we want to do ray traced SSS
if (hdCamera.frameSettings.IsEnabled(FrameSettingsField.RayTracing) && settings.rayTracing.value && GetRayTracingState())
{
using (new ProfilingScope(cmd, ProfilingSampler.Get(HDProfileId.SubsurfaceScattering)))
{
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesXHR = (hdCamera.actualWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesYHR = (hdCamera.actualHeight + (areaTileSize - 1)) / areaTileSize;
// Clear the integration texture first
cmd.SetComputeTextureParam(m_ScreenSpaceShadowsCS, m_ClearShadowTexture, HDShaderIDs._RaytracedShadowIntegration, diffuseBufferRT);
cmd.DispatchCompute(m_ScreenSpaceShadowsCS, m_ClearShadowTexture, numTilesXHR, numTilesYHR, hdCamera.viewCount);
// Fetch the volume overrides that we shall be using
RayTracingShader subSurfaceShader = m_Asset.renderPipelineRayTracingResources.subSurfaceRayTracing;
RayTracingSettings rayTracingSettings = hdCamera.volumeStack.GetComponent <RayTracingSettings>();
ComputeShader deferredRayTracing = m_Asset.renderPipelineRayTracingResources.deferredRaytracingCS;
// Fetch all the intermediate buffers that we need
RTHandle intermediateBuffer0 = GetRayTracingBuffer(InternalRayTracingBuffers.RGBA0);
RTHandle intermediateBuffer1 = GetRayTracingBuffer(InternalRayTracingBuffers.RGBA1);
RTHandle intermediateBuffer2 = GetRayTracingBuffer(InternalRayTracingBuffers.RGBA2);
RTHandle intermediateBuffer3 = GetRayTracingBuffer(InternalRayTracingBuffers.RGBA3);
RTHandle directionBuffer = GetRayTracingBuffer(InternalRayTracingBuffers.Direction);
// Grab the acceleration structure for the target camera
RayTracingAccelerationStructure accelerationStructure = RequestAccelerationStructure();
// Define the shader pass to use for the reflection pass
cmd.SetRayTracingShaderPass(subSurfaceShader, "SubSurfaceDXR");
// Set the acceleration structure for the pass
cmd.SetRayTracingAccelerationStructure(subSurfaceShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
BlueNoise blueNoise = GetBlueNoiseManager();
blueNoise.BindDitheredRNGData8SPP(cmd);
// For every sample that we need to process
for (int sampleIndex = 0; sampleIndex < settings.sampleCount.value; ++sampleIndex)
{
// Inject the ray generation data
cmd.SetRayTracingFloatParams(subSurfaceShader, HDShaderIDs._RaytracingRayBias, rayTracingSettings.rayBias.value);
cmd.SetRayTracingIntParams(subSurfaceShader, HDShaderIDs._RaytracingNumSamples, settings.sampleCount.value);
cmd.SetRayTracingIntParams(subSurfaceShader, HDShaderIDs._RaytracingSampleIndex, sampleIndex);
int frameIndex = RayTracingFrameIndex(hdCamera);
cmd.SetRayTracingIntParam(subSurfaceShader, HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Bind the textures for ray generation
cmd.SetRayTracingTextureParam(subSurfaceShader, HDShaderIDs._DepthTexture, sharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(subSurfaceShader, HDShaderIDs._NormalBufferTexture, sharedRTManager.GetNormalBuffer());
cmd.SetRayTracingTextureParam(subSurfaceShader, HDShaderIDs._SSSBufferTexture, m_SSSColor);
cmd.SetGlobalTexture(HDShaderIDs._StencilTexture, sharedRTManager.GetDepthStencilBuffer(), RenderTextureSubElement.Stencil);
// Set the output textures
cmd.SetRayTracingTextureParam(subSurfaceShader, HDShaderIDs._ThroughputTextureRW, intermediateBuffer0);
cmd.SetRayTracingTextureParam(subSurfaceShader, HDShaderIDs._NormalTextureRW, intermediateBuffer1);
cmd.SetRayTracingTextureParam(subSurfaceShader, HDShaderIDs._PositionTextureRW, intermediateBuffer2);
cmd.SetRayTracingTextureParam(subSurfaceShader, HDShaderIDs._DiffuseLightingTextureRW, intermediateBuffer3);
cmd.SetRayTracingTextureParam(subSurfaceShader, HDShaderIDs._DirectionTextureRW, directionBuffer);
// Run the computation
cmd.DispatchRays(subSurfaceShader, m_RayGenSubSurfaceShaderName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, (uint)hdCamera.viewCount);
// Now let's do the deferred shading pass on the samples
// TODO: Do this only once in the init pass
int currentKernel = deferredRayTracing.FindKernel("RaytracingDiffuseDeferred");
// Bind the lightLoop data
HDRaytracingLightCluster lightCluster = RequestLightCluster();
lightCluster.BindLightClusterData(cmd);
// Bind the input textures
cmd.SetComputeTextureParam(deferredRayTracing, currentKernel, HDShaderIDs._DepthTexture, sharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(deferredRayTracing, currentKernel, HDShaderIDs._ThroughputTextureRW, intermediateBuffer0);
cmd.SetComputeTextureParam(deferredRayTracing, currentKernel, HDShaderIDs._NormalTextureRW, intermediateBuffer1);
cmd.SetComputeTextureParam(deferredRayTracing, currentKernel, HDShaderIDs._PositionTextureRW, intermediateBuffer2);
cmd.SetComputeTextureParam(deferredRayTracing, currentKernel, HDShaderIDs._DirectionTextureRW, directionBuffer);
cmd.SetComputeTextureParam(deferredRayTracing, currentKernel, HDShaderIDs._DiffuseLightingTextureRW, intermediateBuffer3);
// Bind the output texture (it is used for accumulation read and write)
cmd.SetComputeTextureParam(deferredRayTracing, currentKernel, HDShaderIDs._RaytracingLitBufferRW, diffuseBufferRT);
// Compute the Lighting
cmd.DispatchCompute(deferredRayTracing, currentKernel, numTilesXHR, numTilesYHR, hdCamera.viewCount);
}
// Grab the history buffer
RTHandle subsurfaceHistory = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RayTracedSubSurface)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RayTracedSubSurface, SubSurfaceHistoryBufferAllocatorFunction, 1);
// Check if we need to invalidate the history
float historyValidity = 1.0f;
#if UNITY_HDRP_DXR_TESTS_DEFINE
if (Application.isPlaying)
{
historyValidity = 0.0f;
}
else
#endif
// We need to check if something invalidated the history buffers
historyValidity *= ValidRayTracingHistory(hdCamera) ? 1.0f : 0.0f;
// Apply temporal filtering to the buffer
HDTemporalFilter temporalFilter = GetTemporalFilter();
temporalFilter.DenoiseBuffer(cmd, hdCamera, diffuseBufferRT, subsurfaceHistory, intermediateBuffer0, singleChannel: false, historyValidity: historyValidity);
// Push this version of the texture for debug
PushFullScreenDebugTexture(hdCamera, cmd, intermediateBuffer0, FullScreenDebugMode.RayTracedSubSurface);
// Combine it with the rest of the lighting
m_CombineLightingPass.SetTexture(HDShaderIDs._IrradianceSource, intermediateBuffer0);
HDUtils.DrawFullScreen(cmd, m_CombineLightingPass, colorBufferRT, depthStencilBufferRT, shaderPassId: 1);
}
}
else
{
using (new ProfilingScope(cmd, ProfilingSampler.Get(HDProfileId.SubsurfaceScattering)))
{
var parameters = PrepareSubsurfaceScatteringParameters(hdCamera);
var resources = new SubsurfaceScatteringResources();
resources.colorBuffer = colorBufferRT;
resources.diffuseBuffer = diffuseBufferRT;
resources.depthStencilBuffer = depthStencilBufferRT;
resources.depthTexture = depthTextureRT;
resources.cameraFilteringBuffer = m_SSSCameraFilteringBuffer;
resources.coarseStencilBuffer = parameters.coarseStencilBuffer;
resources.sssBuffer = m_SSSColor;
// For Jimenez we always need an extra buffer, for Disney it depends on platform
if (parameters.needTemporaryBuffer)
{
// Clear the SSS filtering target
using (new ProfilingScope(cmd, ProfilingSampler.Get(HDProfileId.ClearSSSFilteringTarget)))
{
CoreUtils.SetRenderTarget(cmd, m_SSSCameraFilteringBuffer, ClearFlag.Color, Color.clear);
}
}
RenderSubsurfaceScattering(parameters, resources, cmd);
}
}
}
void RaytracingRecursiveRender(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, CullingResults cull)
{
// First thing to check is: Do we have a valid ray-tracing environment?
RecursiveRendering recursiveSettings = hdCamera.volumeStack.GetComponent <RecursiveRendering>();
// Check the validity of the state before computing the effect
bool invalidState = !hdCamera.frameSettings.IsEnabled(FrameSettingsField.RayTracing) ||
!recursiveSettings.enable.value;
// If any resource or game-object is missing We stop right away
if (invalidState)
{
return;
}
RayTracingShader forwardShader = m_Asset.renderPipelineRayTracingResources.forwardRaytracing;
Shader raytracingMask = m_Asset.renderPipelineRayTracingResources.raytracingFlagMask;
LightCluster lightClusterSettings = hdCamera.volumeStack.GetComponent <LightCluster>();
RayTracingSettings rtSettings = hdCamera.volumeStack.GetComponent <RayTracingSettings>();
// Grab the acceleration structure and the list of HD lights for the target camera
RayTracingAccelerationStructure accelerationStructure = RequestAccelerationStructure();
HDRaytracingLightCluster lightCluster = RequestLightCluster();
// Fecth the temporary buffers we shall be using
RTHandle flagBuffer = GetRayTracingBuffer(InternalRayTracingBuffers.R0);
if (m_RaytracingFlagMaterial == null)
{
m_RaytracingFlagMaterial = CoreUtils.CreateEngineMaterial(raytracingMask);
}
// Before going into ray tracing, we need to flag which pixels needs to be raytracing
EvaluateRaytracingMask(cull, hdCamera, cmd, renderContext, flagBuffer);
// Define the shader pass to use for the reflection pass
cmd.SetRayTracingShaderPass(forwardShader, "ForwardDXR");
// Set the acceleration structure for the pass
cmd.SetRayTracingAccelerationStructure(forwardShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
cmd.SetRayTracingTextureParam(forwardShader, HDShaderIDs._OwenScrambledTexture, m_Asset.renderPipelineResources.textures.owenScrambledRGBATex);
cmd.SetRayTracingTextureParam(forwardShader, HDShaderIDs._ScramblingTexture, m_Asset.renderPipelineResources.textures.scramblingTex);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtSettings.rayBias.value);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayMaxLength, recursiveSettings.rayLength.value);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingMaxRecursion, recursiveSettings.maxDepth.value);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingCameraNearPlane, hdCamera.camera.nearClipPlane);
// Set the data for the ray generation
cmd.SetRayTracingTextureParam(forwardShader, HDShaderIDs._RaytracingFlagMask, flagBuffer);
cmd.SetRayTracingTextureParam(forwardShader, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(forwardShader, HDShaderIDs._CameraColorTextureRW, m_CameraColorBuffer);
// Set ray count texture
RayCountManager rayCountManager = GetRayCountManager();
cmd.SetRayTracingIntParam(forwardShader, HDShaderIDs._RayCountEnabled, rayCountManager.RayCountIsEnabled());
cmd.SetRayTracingTextureParam(forwardShader, HDShaderIDs._RayCountTexture, rayCountManager.GetRayCountTexture());
// Compute an approximate pixel spread angle value (in radians)
cmd.SetGlobalFloat(HDShaderIDs._RaytracingPixelSpreadAngle, GetPixelSpreadAngle(hdCamera.camera.fieldOfView, hdCamera.actualWidth, hdCamera.actualHeight));
// 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);
// Set the data for the ray miss
cmd.SetRayTracingTextureParam(forwardShader, HDShaderIDs._SkyTexture, m_SkyManager.GetSkyReflection(hdCamera));
// If this is the right debug mode and we have at least one light, write the first shadow to the de-noised texture
RTHandle debugBuffer = GetRayTracingBuffer(InternalRayTracingBuffers.RGBA0);
cmd.SetRayTracingTextureParam(forwardShader, HDShaderIDs._RaytracingPrimaryDebug, debugBuffer);
// Run the computation
cmd.DispatchRays(forwardShader, m_RayGenShaderName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, (uint)hdCamera.viewCount);
HDRenderPipeline hdrp = (RenderPipelineManager.currentPipeline as HDRenderPipeline);
hdrp.PushFullScreenDebugTexture(hdCamera, cmd, debugBuffer, FullScreenDebugMode.RecursiveRayTracing);
}
void BindRayTracedReflectionData(CommandBuffer cmd, HDCamera hdCamera, RayTracingShader reflectionShader, ScreenSpaceReflection settings, LightCluster lightClusterSettings, RayTracingSettings rtSettings)
{
// 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 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, rtSettings.rayBias.value);
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
RayCountManager rayCountManager = GetRayCountManager();
cmd.SetRayTracingIntParam(reflectionShader, HDShaderIDs._RayCountEnabled, rayCountManager.RayCountIsEnabled());
cmd.SetRayTracingTextureParam(reflectionShader, HDShaderIDs._RayCountTexture, rayCountManager.GetRayCountTexture());
// Compute the pixel spread value
cmd.SetGlobalFloat(HDShaderIDs._RaytracingPixelSpreadAngle, GetPixelSpreadAngle(hdCamera.camera.fieldOfView, hdCamera.actualWidth, hdCamera.actualHeight));
// 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);
// Set the data for the ray miss
cmd.SetRayTracingTextureParam(reflectionShader, HDShaderIDs._SkyTexture, m_SkyManager.GetSkyReflection(hdCamera));
}
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 RenderAO(HDCamera hdCamera, CommandBuffer cmd, RTHandle outputTexture, ScriptableRenderContext renderContext, int frameCount)
{
// 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 (!m_RenderPipeline.GetRayTracingState())
{
SetDefaultAmbientOcclusionTexture(cmd);
return;
}
RayTracingShader aoShader = m_PipelineRayTracingResources.aoRaytracing;
var aoSettings = VolumeManager.instance.stack.GetComponent <AmbientOcclusion>();
RayTracingSettings rayTracingSettings = VolumeManager.instance.stack.GetComponent <RayTracingSettings>();
using (new ProfilingSample(cmd, "Ray Trace Ambient Occlusion", CustomSamplerId.RaytracingAmbientOcclusion.GetSampler()))
{
// Grab the acceleration structure for the target camera
RayTracingAccelerationStructure accelerationStructure = m_RenderPipeline.RequestAccelerationStructure();
// 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, rayTracingSettings.rayBias.value);
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_RenderPipeline.sharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(aoShader, HDShaderIDs._NormalBufferTexture, m_RenderPipeline.sharedRTManager.GetNormalBuffer());
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)frameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Inject the ray-tracing sampling data
BlueNoise blueNoise = m_RenderPipeline.GetBlueNoiseManager();
blueNoise.BindDitheredRNGData8SPP(cmd);
// Value used to scale the ao intensity
cmd.SetRayTracingFloatParam(aoShader, HDShaderIDs._RaytracingAOIntensity, aoSettings.intensity.value);
RayCountManager rayCountManager = m_RenderPipeline.GetRayCountManager();
cmd.SetRayTracingIntParam(aoShader, HDShaderIDs._RayCountEnabled, rayCountManager.RayCountIsEnabled());
cmd.SetRayTracingTextureParam(aoShader, HDShaderIDs._RayCountTexture, 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_RenderPipeline.GetTemporalFilter();
temporalFilter.DenoiseBuffer(cmd, hdCamera, m_AOIntermediateBuffer0, ambientOcclusionHistory, m_AOIntermediateBuffer1);
// Apply the diffuse denoiser
HDDiffuseDenoiser diffuseDenoiser = m_RenderPipeline.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 RenderPathTracing(HDCamera hdCamera, CommandBuffer cmd, RTHandle outputTexture, ScriptableRenderContext renderContext, int frameCount)
{
// First thing to check is: Do we have a valid ray-tracing environment?
RayTracingShader pathTracingShader = m_Asset.renderPipelineRayTracingResources.pathTracing;
PathTracing pathTracingSettings = VolumeManager.instance.stack.GetComponent <PathTracing>();
// Check the validity of the state before computing the effect
if (!pathTracingShader || !pathTracingSettings.enable.value)
{
return;
}
// Inject the ray-tracing sampling data
BlueNoise blueNoiseManager = GetBlueNoiseManager();
blueNoiseManager.BindDitheredRNGData256SPP(cmd);
// Grab the history buffer (hijack the reflections one)
RTHandle history = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.PathTracing)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.PathTracing, PathTracingHistoryBufferAllocatorFunction, 1);
// Grab the acceleration structure and the list of HD lights for the target camera
RayTracingAccelerationStructure accelerationStructure = RequestAccelerationStructure();
HDRaytracingLightCluster lightCluster = RequestLightCluster();
LightCluster lightClusterSettings = VolumeManager.instance.stack.GetComponent <LightCluster>();
RayTracingSettings rayTracingSettings = VolumeManager.instance.stack.GetComponent <RayTracingSettings>();
// Define the shader pass to use for the path tracing pass
cmd.SetRayTracingShaderPass(pathTracingShader, "PathTracingDXR");
// Set the acceleration structure for the pass
cmd.SetRayTracingAccelerationStructure(pathTracingShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
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, rayTracingSettings.rayBias.value);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingNumSamples, pathTracingSettings.maximumSamples.value);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingMinRecursion, pathTracingSettings.minimumDepth.value);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingMaxRecursion, pathTracingSettings.maximumDepth.value);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingIntensityClamp, pathTracingSettings.maximumIntensity.value);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingCameraNearPlane, hdCamera.camera.nearClipPlane);
// Set the data for the ray generation
//cmd.SetRayTracingTextureParam(pathTracingShader, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(pathTracingShader, HDShaderIDs._CameraColorTextureRW, outputTexture);
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameCount);
// Compute an approximate pixel spread angle value (in radians)
cmd.SetRayTracingFloatParam(pathTracingShader, HDShaderIDs._RaytracingPixelSpreadAngle, GetPixelSpreadAngle(hdCamera.camera.fieldOfView, hdCamera.actualWidth, hdCamera.actualHeight));
// LightLoop data
cmd.SetGlobalBuffer(HDShaderIDs._RaytracingLightCluster, lightCluster.GetCluster());
cmd.SetGlobalBuffer(HDShaderIDs._LightDatasRT, lightCluster.GetLightDatas());
cmd.SetGlobalVector(HDShaderIDs._MinClusterPos, lightCluster.GetMinClusterPos());
cmd.SetGlobalVector(HDShaderIDs._MaxClusterPos, lightCluster.GetMaxClusterPos());
cmd.SetGlobalInt(HDShaderIDs._LightPerCellCount, lightClusterSettings.maxNumLightsPercell.value);
cmd.SetGlobalInt(HDShaderIDs._PunctualLightCountRT, lightCluster.GetPunctualLightCount());
cmd.SetGlobalInt(HDShaderIDs._AreaLightCountRT, lightCluster.GetAreaLightCount());
// Set the data for the ray miss
cmd.SetRayTracingTextureParam(pathTracingShader, HDShaderIDs._SkyTexture, m_SkyManager.GetSkyReflection(hdCamera));
// Additional data for path tracing
cmd.SetRayTracingTextureParam(pathTracingShader, HDShaderIDs._AccumulatedFrameTexture, history);
cmd.SetRayTracingMatrixParam(pathTracingShader, HDShaderIDs._PixelCoordToViewDirWS, hdCamera.mainViewConstants.pixelCoordToViewDirWS);
// Run the computation
cmd.DispatchRays(pathTracingShader, m_PathTracingRayGenShaderName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
}
void RaytracingRecursiveRender(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, CullingResults cull)
{
if (!hdCamera.frameSettings.IsEnabled(FrameSettingsField.RayTracing))
{
return;
}
RecursiveRendering recursiveSettings = hdCamera.volumeStack.GetComponent <RecursiveRendering>();
if (!recursiveSettings.enable.value)
{
return;
}
// Recursive rendering works as follow:
// - Shader have a _RayTracing property
// When this property is setup to true, a RayTracingPrepass pass on the material is enabled (otherwise it is disabled)
// - Before prepass we render all object with a RayTracingPrepass pass enabled into the depth buffer for performance saving.
// Note that we will exclude from the rendering of DepthPrepass, GBuffer and Forward pass the raytraced objects but not from
// motion vector pass, so we can still benefit from motion vector. This is handled in VertMesh.hlsl (see below).
// However currently when rendering motion vector this will tag the stencil for deferred lighting, and thus could produce overshading.
// - After Transparent Depth pass we render all object with a RayTracingPrepass pass enabled into output a mask buffer (need to depth test but not to write depth)
// Note: we render two times: one to save performance and the other to write the mask, otherwise if we write the mask in the first pass it
// will not take into account the objects which could render on top of the raytracing one (If we want to do that we need to perform the pass after that
// the depth buffer is ready, which is after the Gbuffer pass, so we can't save performance).
// - During RaytracingRecursiveRender we perform a RayTracingRendering.raytrace call on all pixel tag in the mask
// It is require to exclude mesh from regular pass to save performance (for opaque) and get correct result (for transparent)
// For this we cull the mesh by setuping their position to NaN if _RayTracing is true and _EnableRecursiveRayTracing true.
// We use this method to avoid to have to deal with RenderQueue and it allow to dynamically disabled Recursive rendering
// and fallback to classic rasterize transparent this way. The code for the culling is in VertMesh()
// If raytracing is disable _EnableRecursiveRayTracing is set to false and no culling happen.
// Objects are still render in shadow and motion vector pass to keep their properties.
// We render Recursive render object before transparent, so transparent object can be overlayed on top
// like lens flare on top of headlight. We write the depth, so it correctly z-test object behind as recursive rendering
// re-render everything (Mean we should also support fog and sky into it).
using (new ProfilingScope(cmd, ProfilingSampler.Get(HDProfileId.RayTracingRecursiveRendering)))
{
RayTracingShader forwardShader = m_Asset.renderPipelineRayTracingResources.forwardRaytracing;
LightCluster lightClusterSettings = hdCamera.volumeStack.GetComponent <LightCluster>();
RayTracingSettings rtSettings = hdCamera.volumeStack.GetComponent <RayTracingSettings>();
// Grab the acceleration structure and the list of HD lights for the target camera
RayTracingAccelerationStructure accelerationStructure = RequestAccelerationStructure();
HDRaytracingLightCluster lightCluster = RequestLightCluster();
// Define the shader pass to use for the reflection pass
cmd.SetRayTracingShaderPass(forwardShader, "ForwardDXR");
// Set the acceleration structure for the pass
cmd.SetRayTracingAccelerationStructure(forwardShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
cmd.SetRayTracingTextureParam(forwardShader, HDShaderIDs._OwenScrambledTexture, m_Asset.renderPipelineResources.textures.owenScrambledRGBATex);
cmd.SetRayTracingTextureParam(forwardShader, HDShaderIDs._ScramblingTexture, m_Asset.renderPipelineResources.textures.scramblingTex);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtSettings.rayBias.value);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayMaxLength, recursiveSettings.rayLength.value);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingMaxRecursion, recursiveSettings.maxDepth.value);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingCameraNearPlane, hdCamera.camera.nearClipPlane);
// Set the data for the ray generation
// Fecth the temporary buffers we shall be using
RTHandle flagBuffer = GetRayTracingBuffer(InternalRayTracingBuffers.R0);
cmd.SetRayTracingTextureParam(forwardShader, HDShaderIDs._RaytracingFlagMask, flagBuffer);
cmd.SetRayTracingTextureParam(forwardShader, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(forwardShader, HDShaderIDs._CameraColorTextureRW, m_CameraColorBuffer);
// Set ray count texture
RayCountManager rayCountManager = GetRayCountManager();
cmd.SetGlobalInt(HDShaderIDs._RayCountEnabled, rayCountManager.RayCountIsEnabled());
cmd.SetRayTracingTextureParam(forwardShader, HDShaderIDs._RayCountTexture, rayCountManager.GetRayCountTexture());
// Compute an approximate pixel spread angle value (in radians)
cmd.SetGlobalFloat(HDShaderIDs._RaytracingPixelSpreadAngle, GetPixelSpreadAngle(hdCamera.camera.fieldOfView, hdCamera.actualWidth, hdCamera.actualHeight));
// 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);
// Set the data for the ray miss
cmd.SetRayTracingTextureParam(forwardShader, HDShaderIDs._SkyTexture, m_SkyManager.GetSkyReflection(hdCamera));
// If this is the right debug mode and we have at least one light, write the first shadow to the de-noised texture
RTHandle debugBuffer = GetRayTracingBuffer(InternalRayTracingBuffers.RGBA0);
cmd.SetRayTracingTextureParam(forwardShader, HDShaderIDs._RaytracingPrimaryDebug, debugBuffer);
// Run the computation
cmd.DispatchRays(forwardShader, m_RayGenShaderName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, (uint)hdCamera.viewCount);
HDRenderPipeline hdrp = (RenderPipelineManager.currentPipeline as HDRenderPipeline);
hdrp.PushFullScreenDebugTexture(hdCamera, cmd, debugBuffer, FullScreenDebugMode.RecursiveRayTracing);
}
}
void RenderReflectionsPerformance(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;
RTHandle intermediateBuffer0 = GetRayTracingBuffer(InternalRayTracingBuffers.RGBA0);
RTHandle intermediateBuffer1 = GetRayTracingBuffer(InternalRayTracingBuffers.RGBA1);
// Fetch all the settings
var settings = hdCamera.volumeStack.GetComponent <ScreenSpaceReflection>();
LightCluster lightClusterSettings = hdCamera.volumeStack.GetComponent <LightCluster>();
RayTracingSettings rtSettings = hdCamera.volumeStack.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 ProfilingScope(cmd, ProfilingSampler.Get(HDProfileId.RaytracingIntegrateReflection)))
{
// 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);
cmd.SetComputeIntParam(reflectionShaderCS, HDShaderIDs._SsrStencilBit, (int)StencilUsage.TraceReflectionRay);
cmd.SetComputeTextureParam(reflectionShaderCS, currentKernel, HDShaderIDs._StencilTexture, m_SharedRTManager.GetDepthStencilBuffer(), 0, RenderTextureSubElement.Stencil);
// 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 = RayTracingFrameIndex(hdCamera);
cmd.SetComputeIntParam(reflectionShaderCS, HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Bind the output buffers
cmd.SetComputeTextureParam(reflectionShaderCS, currentKernel, HDShaderIDs._RaytracingDirectionBuffer, intermediateBuffer1);
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, intermediateBuffer1, intermediateBuffer0);
// Evaluate the deferred lighting
RenderRaytracingDeferredLighting(cmd, deferredParamters, deferredResources);
// 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, intermediateBuffer0);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._SsrHitPointTexture, intermediateBuffer1);
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);
cmd.SetComputeFloatParam(reflectionFilter, HDShaderIDs._RaytracingReflectionSmoothnessFadeStart, settings.smoothnessFadeStart.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 ProfilingScope(cmd, ProfilingSampler.Get(HDProfileId.RaytracingFilterReflection)))
{
if (settings.denoise.value)
{
// Grab the history buffer
RTHandle reflectionHistory = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedReflection)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedReflection, ReflectionHistoryBufferAllocatorFunction, 1);
float historyValidity = 1.0f;
#if UNITY_HDRP_DXR_TESTS_DEFINE
if (Application.isPlaying)
{
historyValidity = 0.0f;
}
else
#endif
// We need to check if something invalidated the history buffers
historyValidity *= ValidRayTracingHistory(hdCamera) ? 1.0f : 0.0f;
HDReflectionDenoiser reflectionDenoiser = GetReflectionDenoiser();
reflectionDenoiser.DenoiseBuffer(cmd, hdCamera, settings.denoiserRadius.value, outputTexture, reflectionHistory, intermediateBuffer0, historyValidity: historyValidity);
HDUtils.BlitCameraTexture(cmd, intermediateBuffer0, outputTexture);
}
}
}
internal void BuildRayTracingAccelerationStructure(HDCamera hdCamera)
{
// Resets the rtas manager
m_RTASManager.Reset();
// Resets the light lists
m_RayTracingLights.Reset();
// Reset all the flags
m_ValidRayTracingState = false;
m_ValidRayTracingCluster = false;
m_ValidRayTracingClusterCulling = false;
m_RayTracedShadowsRequired = false;
m_RayTracedContactShadowsRequired = false;
// If the camera does not have a ray tracing frame setting or it is a preview camera (due to the fact that the sphere does not exist as a game object we can't create the RTAS) we do not want to build a RTAS
if (!hdCamera.frameSettings.IsEnabled(FrameSettingsField.RayTracing))
{
return;
}
// Collect the lights
CollectLightsForRayTracing(hdCamera, ref m_RTASManager.transformsDirty);
// Evaluate the parameters of the effects
HDEffectsParameters effectParameters = EvaluateEffectsParameters(hdCamera, m_RayTracedShadowsRequired, m_RayTracedContactShadowsRequired);
if (!effectParameters.rayTracingRequired)
{
return;
}
// Grab the ray tracing settings
RayTracingSettings rtSettings = hdCamera.volumeStack.GetComponent <RayTracingSettings>();
#if UNITY_EDITOR
if (rtSettings.buildMode.value == RTASBuildMode.Automatic || hdCamera.camera.cameraType == CameraType.SceneView)
#else
if (rtSettings.buildMode.value == RTASBuildMode.Automatic)
#endif
{
// Cull the scene for the RTAS
RayTracingInstanceCullingResults cullingResults = m_RTASManager.Cull(hdCamera, effectParameters);
// Update the material dirtiness for the PT
if (effectParameters.pathTracing)
{
m_RTASManager.transformsDirty |= cullingResults.transformsChanged;
for (int i = 0; i < cullingResults.materialsCRC.Length; i++)
{
RayTracingInstanceMaterialCRC matCRC = cullingResults.materialsCRC[i];
m_RTASManager.materialsDirty |= UpdateMaterialCRC(matCRC.instanceID, matCRC.crc);
}
}
// Build the ray tracing acceleration structure
m_RTASManager.Build(hdCamera);
// tag the structures as valid
m_ValidRayTracingState = true;
}
else
{
// If the user fed a non null ray tracing acceleration structure, then we are all set.
if (hdCamera.rayTracingAccelerationStructure != null)
{
m_ValidRayTracingState = true;
}
}
}
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);
}
}
}
void RenderRayTracedDirectionalScreenSpaceShadow(RenderGraph renderGraph, HDCamera hdCamera,
TextureHandle depthBuffer, TextureHandle normalBuffer, TextureHandle motionVetorsBuffer, TextureHandle historyValidityBuffer,
TextureHandle rayCountTexture, TextureHandle screenSpaceShadowArray)
{
TextureHandle directionalShadow;
TextureHandle velocityBuffer;
TextureHandle distanceBuffer;
bool softShadows = m_CurrentSunLightAdditionalLightData.angularDiameter > 0.0 ? true : false;
using (var builder = renderGraph.AddRenderPass <RTSDirectionalTracePassData>("Directional RT Shadow", out var passData, ProfilingSampler.Get(HDProfileId.RaytracingDirectionalLightShadow)))
{
RayTracingSettings rayTracingSettings = hdCamera.volumeStack.GetComponent <RayTracingSettings>();
// Set the camera parameters
passData.texWidth = hdCamera.actualWidth;
passData.texHeight = hdCamera.actualHeight;
passData.viewCount = hdCamera.viewCount;
// Evaluation parameters
passData.softShadow = softShadows;
// If the surface is infinitively small, we force it to one sample.
passData.numShadowSamples = passData.softShadow ? m_CurrentSunLightAdditionalLightData.numRayTracingSamples : 1;
passData.colorShadow = m_CurrentSunLightAdditionalLightData.colorShadow;
passData.maxShadowLength = rayTracingSettings.directionalShadowRayLength.value;
// Kernels
passData.clearShadowKernel = m_ClearShadowTexture;
passData.directionalShadowSample = m_RaytracingDirectionalShadowSample;
// Grab the acceleration structure for the target camera
passData.accelerationStructure = RequestAccelerationStructure(hdCamera);
passData.screenSpaceShadowCS = m_ScreenSpaceShadowsCS;
passData.screenSpaceShadowRT = m_ScreenSpaceShadowsRT;
passData.shaderVariablesRayTracingCB = m_ShaderVariablesRayTracingCB;
passData.ditheredTextureSet = GetBlueNoiseManager().DitheredTextureSet8SPP();
// Input Buffer
passData.depthStencilBuffer = builder.UseDepthBuffer(depthBuffer, DepthAccess.Read);
passData.normalBuffer = builder.ReadTexture(normalBuffer);
passData.directionBuffer = builder.CreateTransientTexture(new TextureDesc(Vector2.one, true, true)
{
colorFormat = GraphicsFormat.R16G16B16A16_SFloat, enableRandomWrite = true, name = "Direction Buffer"
});
// Debug buffers
passData.rayCountTexture = builder.ReadWriteTexture(rayCountTexture);
// Output Buffers
passData.velocityBuffer = builder.ReadWriteTexture(renderGraph.CreateTexture(new TextureDesc(Vector2.one, true, true)
{
colorFormat = GraphicsFormat.R8_SNorm, enableRandomWrite = true, clearBuffer = true, name = "Velocity Buffer"
}));
passData.distanceBuffer = builder.ReadWriteTexture(renderGraph.CreateTexture(new TextureDesc(Vector2.one, true, true)
{
colorFormat = GraphicsFormat.R32_SFloat, enableRandomWrite = true, clearBuffer = true, name = "Distance Buffer"
}));
passData.outputShadowBuffer = builder.ReadWriteTexture(renderGraph.CreateTexture(new TextureDesc(Vector2.one, true, true)
{
colorFormat = GraphicsFormat.R16G16B16A16_SFloat, enableRandomWrite = true, clearBuffer = true, name = "RT Directional Shadow"
}));
builder.SetRenderFunc(
(RTSDirectionalTracePassData data, RenderGraphContext ctx) =>
{
// Inject the ray-tracing sampling data
BlueNoise.BindDitheredTextureSet(ctx.cmd, data.ditheredTextureSet);
// Evaluate the dispatch parameters
int shadowTileSize = 8;
int numTilesX = (data.texWidth + (shadowTileSize - 1)) / shadowTileSize;
int numTilesY = (data.texHeight + (shadowTileSize - 1)) / shadowTileSize;
// Clear the integration texture
ctx.cmd.SetComputeTextureParam(data.screenSpaceShadowCS, data.clearShadowKernel, HDShaderIDs._RaytracedShadowIntegration, data.outputShadowBuffer);
ctx.cmd.DispatchCompute(data.screenSpaceShadowCS, data.clearShadowKernel, numTilesX, numTilesY, data.viewCount);
ctx.cmd.SetComputeTextureParam(data.screenSpaceShadowCS, data.clearShadowKernel, HDShaderIDs._RaytracedShadowIntegration, data.velocityBuffer);
ctx.cmd.DispatchCompute(data.screenSpaceShadowCS, data.clearShadowKernel, numTilesX, numTilesY, data.viewCount);
ctx.cmd.SetComputeTextureParam(data.screenSpaceShadowCS, data.clearShadowKernel, HDShaderIDs._RaytracedShadowIntegration, data.distanceBuffer);
ctx.cmd.DispatchCompute(data.screenSpaceShadowCS, data.clearShadowKernel, numTilesX, numTilesY, data.viewCount);
// Grab and bind the acceleration structure for the target camera
ctx.cmd.SetRayTracingAccelerationStructure(data.screenSpaceShadowRT, HDShaderIDs._RaytracingAccelerationStructureName, data.accelerationStructure);
// Make sure the right closest hit/any hit will be triggered by using the right multi compile
CoreUtils.SetKeyword(ctx.cmd, "TRANSPARENT_COLOR_SHADOW", data.colorShadow);
// Define which ray generation shaders we shall be using
string directionaLightShadowShader = data.colorShadow ? m_RayGenDirectionalColorShadowSingleName : m_RayGenDirectionalShadowSingleName;
// Loop through the samples of this frame
for (int sampleIdx = 0; sampleIdx < data.numShadowSamples; ++sampleIdx)
{
// Update global Constant Buffer
data.shaderVariablesRayTracingCB._RaytracingSampleIndex = sampleIdx;
data.shaderVariablesRayTracingCB._RaytracingNumSamples = data.numShadowSamples;
ConstantBuffer.PushGlobal(ctx.cmd, data.shaderVariablesRayTracingCB, HDShaderIDs._ShaderVariablesRaytracing);
// Input Buffer
ctx.cmd.SetComputeTextureParam(data.screenSpaceShadowCS, data.directionalShadowSample, HDShaderIDs._DepthTexture, data.depthStencilBuffer);
ctx.cmd.SetComputeTextureParam(data.screenSpaceShadowCS, data.directionalShadowSample, HDShaderIDs._NormalBufferTexture, data.normalBuffer);
// Output buffer
ctx.cmd.SetComputeTextureParam(data.screenSpaceShadowCS, data.directionalShadowSample, HDShaderIDs._RaytracingDirectionBuffer, data.directionBuffer);
// Generate a new direction
ctx.cmd.DispatchCompute(data.screenSpaceShadowCS, data.directionalShadowSample, numTilesX, numTilesY, data.viewCount);
// Define the shader pass to use for the shadow pass
ctx.cmd.SetRayTracingShaderPass(data.screenSpaceShadowRT, "VisibilityDXR");
// Input Uniforms
ctx.cmd.SetRayTracingFloatParam(data.screenSpaceShadowRT, HDShaderIDs._DirectionalMaxRayLength, data.maxShadowLength);
// Set ray count texture
ctx.cmd.SetRayTracingTextureParam(data.screenSpaceShadowRT, HDShaderIDs._RayCountTexture, data.rayCountTexture);
// Input buffers
ctx.cmd.SetRayTracingTextureParam(data.screenSpaceShadowRT, HDShaderIDs._DepthTexture, data.depthStencilBuffer);
ctx.cmd.SetRayTracingTextureParam(data.screenSpaceShadowRT, HDShaderIDs._NormalBufferTexture, data.normalBuffer);
ctx.cmd.SetRayTracingTextureParam(data.screenSpaceShadowRT, HDShaderIDs._RaytracingDirectionBuffer, data.directionBuffer);
// Output buffer
ctx.cmd.SetRayTracingTextureParam(data.screenSpaceShadowRT, data.colorShadow ? HDShaderIDs._RaytracedColorShadowIntegration : HDShaderIDs._RaytracedShadowIntegration, data.outputShadowBuffer);
ctx.cmd.SetRayTracingTextureParam(data.screenSpaceShadowRT, HDShaderIDs._VelocityBuffer, data.velocityBuffer);
ctx.cmd.SetRayTracingTextureParam(data.screenSpaceShadowRT, HDShaderIDs._RaytracingDistanceBufferRW, data.distanceBuffer);
// Evaluate the visibility
ctx.cmd.DispatchRays(data.screenSpaceShadowRT, directionaLightShadowShader, (uint)data.texWidth, (uint)data.texHeight, (uint)data.viewCount);
}
// Now that we are done with the ray tracing bit, disable the multi compile that was potentially enabled
CoreUtils.SetKeyword(ctx.cmd, "TRANSPARENT_COLOR_SHADOW", false);
});
directionalShadow = passData.outputShadowBuffer;
velocityBuffer = passData.velocityBuffer;
distanceBuffer = passData.distanceBuffer;
}
// If required, denoise the shadow
if (m_CurrentSunLightAdditionalLightData.filterTracedShadow && softShadows)
{
directionalShadow = DenoiseDirectionalScreenSpaceShadow(renderGraph, hdCamera,
depthBuffer, normalBuffer, motionVetorsBuffer, historyValidityBuffer,
directionalShadow, velocityBuffer, distanceBuffer);
}
int dirShadowIndex = m_CurrentSunLightDirectionalLightData.screenSpaceShadowIndex & (int)LightDefinitions.s_ScreenSpaceShadowIndexMask;
ScreenSpaceShadowType shadowType = m_CurrentSunLightAdditionalLightData.colorShadow ? ScreenSpaceShadowType.Color : ScreenSpaceShadowType.GrayScale;
// Write the result texture to the screen space shadow buffer
WriteScreenSpaceShadow(renderGraph, hdCamera, directionalShadow, screenSpaceShadowArray, dirShadowIndex, shadowType);
}
void RenderIndirectDiffusePerformance(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, int frameCount)
{
// Fetch the required resources
var settings = hdCamera.volumeStack.GetComponent <GlobalIllumination>();
BlueNoise blueNoise = GetBlueNoiseManager();
// Fetch all the settings
LightCluster lightClusterSettings = hdCamera.volumeStack.GetComponent <LightCluster>();
RayTracingSettings rtSettings = hdCamera.volumeStack.GetComponent <RayTracingSettings>();
ComputeShader indirectDiffuseCS = m_Asset.renderPipelineRayTracingResources.indirectDiffuseRaytracingCS;
// 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.RaytracingIntegrateIndirectDiffuse)))
{
// 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.SetGlobalFloat(HDShaderIDs._RaytracingIntensityClamp, settings.clampValue.value);
// Bind the sampling data
int frameIndex = RayTracingFrameIndex(hdCamera);
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Bind the output buffers
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._RaytracingDirectionBuffer, directionBuffer);
// 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, directionBuffer, m_IndirectDiffuseBuffer);
// Evaluate the deferred lighting
RenderRaytracingDeferredLighting(cmd, deferredParamters, deferredResources);
}
using (new ProfilingScope(cmd, ProfilingSampler.Get(HDProfileId.RaytracingFilterIndirectDiffuse)))
{
// 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_IndirectDiffuseBuffer);
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._RaytracingDirectionBuffer, directionBuffer);
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._BlueNoiseTexture, blueNoise.textureArray16RGB);
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._UpscaledIndirectDiffuseTextureRW, intermediateBuffer1);
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, intermediateBuffer1, m_IndirectDiffuseBuffer);
// Denoise if required
if (settings.denoise.value)
{
DenoiseIndirectDiffuseBuffer(hdCamera, cmd, settings);
}
}
}
void SetupCullingData(HDCamera hdCamera, bool pathTracingEnabled)
{
// Grab the ray tracing settings parameter
RayTracingSettings rtSettings = hdCamera.volumeStack.GetComponent <RayTracingSettings>();
switch (rtSettings.cullingMode.value)
{
case RTASCullingMode.ExtendedFrustum:
{
// We'll be using an extension
cullingConfig.flags = RayTracingInstanceCullingFlags.EnablePlaneCulling;
// Build the culling plane data
Vector3 camerPosWS = hdCamera.camera.transform.position;
Vector3 forward = hdCamera.camera.transform.forward;
Vector3 right = hdCamera.camera.transform.right;
Vector3 up = hdCamera.camera.transform.up;
float far, height, width;
far = hdCamera.camera.farClipPlane;
height = Mathf.Tan(Mathf.Deg2Rad * hdCamera.camera.fieldOfView * 0.5f) * far;
float horizontalFov = Camera.VerticalToHorizontalFieldOfView(hdCamera.camera.fieldOfView, hdCamera.camera.aspect);
width = Mathf.Tan(Mathf.Deg2Rad * horizontalFov * 0.5f) * far;
// Front plane
rtCullingPlaneArray[0].normal = -forward;
rtCullingPlaneArray[0].distance = -Vector3.Dot(camerPosWS + forward * far, -forward);
// Back plane
rtCullingPlaneArray[1].normal = forward;
rtCullingPlaneArray[1].distance = -Vector3.Dot(camerPosWS - forward * far, forward);
// Right plane
rtCullingPlaneArray[2].normal = -right;
rtCullingPlaneArray[2].distance = -Vector3.Dot(camerPosWS + right * width, -right);
// Left plane
rtCullingPlaneArray[3].normal = right;
rtCullingPlaneArray[3].distance = -Vector3.Dot(camerPosWS - right * width, right);
// Top plane
rtCullingPlaneArray[4].normal = -up;
rtCullingPlaneArray[4].distance = -Vector3.Dot(camerPosWS + up * height, -up);
// Bottom plane
rtCullingPlaneArray[5].normal = up;
rtCullingPlaneArray[5].distance = -Vector3.Dot(camerPosWS - up * height, up);
// Set the planes
cullingConfig.planes = rtCullingPlaneArray;
}
break;
case RTASCullingMode.Sphere:
{
// We use a sphere
cullingConfig.flags = RayTracingInstanceCullingFlags.EnableSphereCulling;
cullingConfig.sphereRadius = rtSettings.cullingDistance.value;
cullingConfig.sphereCenter = hdCamera.camera.transform.position;
}
break;
default:
{
// We explicitly want no culling.
cullingConfig.flags = RayTracingInstanceCullingFlags.None;
}
break;
}
// We want the LODs to match the rasterization and we want to exclude reflection probes
cullingConfig.flags |= RayTracingInstanceCullingFlags.EnableLODCulling | RayTracingInstanceCullingFlags.IgnoreReflectionProbes;
// Dirtiness need to be kept track of for the path tracing (when enabled)
if (pathTracingEnabled)
{
cullingConfig.flags |= RayTracingInstanceCullingFlags.ComputeMaterialsCRC;
}
}
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.SetGlobalInt(HDShaderIDs._RaytracingNumSamples, settings.sampleCount.value);
int frameIndex = RayTracingFrameIndex(hdCamera);
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.SetGlobalFloat(HDShaderIDs._RaytracingIntensityClamp, settings.clampValue.value);
// Set ray count texture
RayCountManager rayCountManager = GetRayCountManager();
cmd.SetGlobalInt(HDShaderIDs._RayCountEnabled, rayCountManager.RayCountIsEnabled());
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._RayCountTexture, rayCountManager.GetRayCountTexture());
// Compute the pixel spread value
cmd.SetGlobalFloat(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);
}
void RenderPathTracing(HDCamera hdCamera, CommandBuffer cmd, RTHandle outputTexture)
{
RayTracingShader pathTracingShader = m_Asset.renderPipelineRayTracingResources.pathTracing;
m_PathTracingSettings = hdCamera.volumeStack.GetComponent <PathTracing>();
// Check the validity of the state before moving on with the computation
if (!pathTracingShader || !m_PathTracingSettings.enable.value)
{
return;
}
CheckDirtiness(hdCamera);
// Inject the ray-tracing sampling data
BlueNoise blueNoiseManager = GetBlueNoiseManager();
blueNoiseManager.BindDitheredRNGData256SPP(cmd);
// Grab the acceleration structure and the list of HD lights for the target camera
RayTracingAccelerationStructure accelerationStructure = RequestAccelerationStructure();
HDRaytracingLightCluster lightCluster = RequestLightCluster();
LightCluster lightClusterSettings = hdCamera.volumeStack.GetComponent <LightCluster>();
RayTracingSettings rayTracingSettings = hdCamera.volumeStack.GetComponent <RayTracingSettings>();
if (!m_SubFrameManager.isRecording)
{
// If we are recording, the max iteration is set/overridden by the subframe manager, otherwise we read it from the path tracing volume
m_SubFrameManager.subFrameCount = (uint)m_PathTracingSettings.maximumSamples.value;
}
#if UNITY_HDRP_DXR_TESTS_DEFINE
if (Application.isPlaying)
{
m_SubFrameManager.subFrameCount = 1;
}
#endif
uint currentIteration = m_SubFrameManager.iteration;
if (currentIteration < m_SubFrameManager.subFrameCount)
{
// Define the shader pass to use for the path tracing pass
cmd.SetRayTracingShaderPass(pathTracingShader, "PathTracingDXR");
// Set the acceleration structure for the pass
cmd.SetRayTracingAccelerationStructure(pathTracingShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
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._RaytracingNumSamples, m_SubFrameManager.subFrameCount);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingMinRecursion, m_PathTracingSettings.minimumDepth.value);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingMaxRecursion, m_PathTracingSettings.maximumDepth.value);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingIntensityClamp, m_PathTracingSettings.maximumIntensity.value);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rayTracingSettings.rayBias.value);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingCameraNearPlane, hdCamera.camera.nearClipPlane);
// Set the data for the ray generation
cmd.SetGlobalInt(HDShaderIDs._RaytracingSampleIndex, (int)m_SubFrameManager.iteration);
// Compute an approximate pixel spread angle value (in radians)
cmd.SetGlobalFloat(HDShaderIDs._RaytracingPixelSpreadAngle, GetPixelSpreadAngle(hdCamera.camera.fieldOfView, hdCamera.actualWidth, hdCamera.actualHeight));
// LightLoop data
cmd.SetGlobalBuffer(HDShaderIDs._RaytracingLightCluster, lightCluster.GetCluster());
cmd.SetGlobalBuffer(HDShaderIDs._LightDatasRT, lightCluster.GetLightDatas());
cmd.SetGlobalVector(HDShaderIDs._MinClusterPos, lightCluster.GetMinClusterPos());
cmd.SetGlobalVector(HDShaderIDs._MaxClusterPos, lightCluster.GetMaxClusterPos());
cmd.SetGlobalInt(HDShaderIDs._LightPerCellCount, lightClusterSettings.maxNumLightsPercell.value);
cmd.SetGlobalInt(HDShaderIDs._PunctualLightCountRT, lightCluster.GetPunctualLightCount());
cmd.SetGlobalInt(HDShaderIDs._AreaLightCountRT, lightCluster.GetAreaLightCount());
// Set the data for the ray miss
cmd.SetRayTracingIntParam(pathTracingShader, HDShaderIDs._RaytracingCameraSkyEnabled, m_CameraSkyEnabled ? 1 : 0);
cmd.SetRayTracingVectorParam(pathTracingShader, HDShaderIDs._RaytracingCameraClearColor, hdCamera.backgroundColorHDR);
cmd.SetRayTracingTextureParam(pathTracingShader, HDShaderIDs._SkyTexture, m_SkyManager.GetSkyReflection(hdCamera));
// Additional data for path tracing
cmd.SetRayTracingTextureParam(pathTracingShader, HDShaderIDs._RadianceTexture, m_RadianceTexture);
cmd.SetRayTracingMatrixParam(pathTracingShader, HDShaderIDs._PixelCoordToViewDirWS, hdCamera.mainViewConstants.pixelCoordToViewDirWS);
cmd.SetRayTracingVectorParam(pathTracingShader, HDShaderIDs._PathTracedDoFConstants, ComputeDoFConstants(hdCamera, m_PathTracingSettings));
cmd.SetRayTracingVectorParam(pathTracingShader, HDShaderIDs._InvViewportScaleBias, HDUtils.ComputeInverseViewportScaleBias(hdCamera));
// Run the computation
cmd.DispatchRays(pathTracingShader, "RayGen", (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
}
RenderAccumulation(hdCamera, cmd, m_RadianceTexture, outputTexture, true);
}
