public void Render(CommandBuffer cmd, HDCamera camera, SharedRTManager sharedRTManager, ScriptableRenderContext renderContext, int frameCount)
{
var settings = VolumeManager.instance.stack.GetComponent <AmbientOcclusion>();
if (!IsActive(camera, settings))
{
// No AO applied - neutral is black, see the comment in the shaders
cmd.SetGlobalTexture(HDShaderIDs._AmbientOcclusionTexture, TextureXR.GetBlackTexture());
cmd.SetGlobalVector(HDShaderIDs._AmbientOcclusionParam, Vector4.zero);
return;
}
else
{
#if ENABLE_RAYTRACING
HDRaytracingEnvironment rtEnvironement = m_RayTracingManager.CurrentEnvironment();
if (rtEnvironement != null && settings.enableRaytracing.value)
{
m_RaytracingAmbientOcclusion.RenderAO(camera, cmd, m_AmbientOcclusionTex, renderContext, frameCount);
}
else
#endif
{
Dispatch(cmd, camera, sharedRTManager, frameCount);
PostDispatchWork(cmd, camera, sharedRTManager);
}
}
}
void EvaluateClusterVolume(HDRaytracingEnvironment currentEnv, HDCamera hdCamera, int numLights)
{
clusterCenter = hdCamera.camera.gameObject.transform.position;
minClusterPos.Set(float.MaxValue, float.MaxValue, float.MaxValue);
maxClusterPos.Set(-float.MaxValue, -float.MaxValue, -float.MaxValue);
for (int lightIdx = 0; lightIdx < numLights; ++lightIdx)
{
minClusterPos.x = Mathf.Min(m_LightVolumesCPUArray[lightIdx].position.x - m_LightVolumesCPUArray[lightIdx].range, minClusterPos.x);
minClusterPos.y = Mathf.Min(m_LightVolumesCPUArray[lightIdx].position.y - m_LightVolumesCPUArray[lightIdx].range, minClusterPos.y);
minClusterPos.z = Mathf.Min(m_LightVolumesCPUArray[lightIdx].position.z - m_LightVolumesCPUArray[lightIdx].range, minClusterPos.z);
maxClusterPos.x = Mathf.Max(m_LightVolumesCPUArray[lightIdx].position.x + m_LightVolumesCPUArray[lightIdx].range, maxClusterPos.x);
maxClusterPos.y = Mathf.Max(m_LightVolumesCPUArray[lightIdx].position.y + m_LightVolumesCPUArray[lightIdx].range, maxClusterPos.y);
maxClusterPos.z = Mathf.Max(m_LightVolumesCPUArray[lightIdx].position.z + m_LightVolumesCPUArray[lightIdx].range, maxClusterPos.z);
}
minClusterPos.x = minClusterPos.x < clusterCenter.x - currentEnv.cameraClusterRange ? clusterCenter.x - currentEnv.cameraClusterRange : minClusterPos.x;
minClusterPos.y = minClusterPos.y < clusterCenter.y - currentEnv.cameraClusterRange ? clusterCenter.y - currentEnv.cameraClusterRange : minClusterPos.y;
minClusterPos.z = minClusterPos.z < clusterCenter.z - currentEnv.cameraClusterRange ? clusterCenter.z - currentEnv.cameraClusterRange : minClusterPos.z;
maxClusterPos.x = maxClusterPos.x > clusterCenter.x + currentEnv.cameraClusterRange ? clusterCenter.x + currentEnv.cameraClusterRange : maxClusterPos.x;
maxClusterPos.y = maxClusterPos.y > clusterCenter.y + currentEnv.cameraClusterRange ? clusterCenter.y + currentEnv.cameraClusterRange : maxClusterPos.y;
maxClusterPos.z = maxClusterPos.z > clusterCenter.z + currentEnv.cameraClusterRange ? clusterCenter.z + currentEnv.cameraClusterRange : maxClusterPos.z;
// Compute the cell size per dimension
clusterCellSize = (maxClusterPos - minClusterPos);
clusterCellSize.x /= 64.0f;
clusterCellSize.y /= 64.0f;
clusterCellSize.z /= 32.0f;
// Compute the bounds of the cluster volume3
clusterCenter = (maxClusterPos + minClusterPos) / 2.0f;
clusterDimension = (maxClusterPos - minClusterPos);
}
void BuildLightCluster(CommandBuffer cmd, ComputeShader lightClusterCS, HDRaytracingEnvironment currentEnv, int numLights)
{
using (new ProfilingSample(cmd, "Build Light Cluster", CustomSamplerId.RaytracingBuildCluster.GetSampler()))
{
// Make sure the Cluster buffer has the right size
int bufferSize = 64 * 64 * 32 * (currentEnv.maxNumLightsPercell + 3);
if (m_LightCluster.count != bufferSize)
{
ResizeClusterBuffer(bufferSize);
}
// Grab the kernel
int lightClusterKernel = lightClusterCS.FindKernel(m_LightClusterKernelName);
// Inject all the parameters
cmd.SetComputeBufferParam(lightClusterCS, lightClusterKernel, _RaytracingLightCluster, m_LightCluster);
cmd.SetComputeVectorParam(lightClusterCS, _MinClusterPos, minClusterPos);
cmd.SetComputeVectorParam(lightClusterCS, _MaxClusterPos, maxClusterPos);
cmd.SetComputeVectorParam(lightClusterCS, _ClusterCellSize, clusterCellSize);
cmd.SetComputeFloatParam(lightClusterCS, _LightPerCellCount, HDShadowUtils.Asfloat(currentEnv.maxNumLightsPercell));
cmd.SetComputeBufferParam(lightClusterCS, lightClusterKernel, _LightVolumes, m_LightVolumeGPUArray);
cmd.SetComputeFloatParam(lightClusterCS, _LightVolumeCount, HDShadowUtils.Asfloat(numLights));
cmd.SetComputeBufferParam(lightClusterCS, lightClusterKernel, _RaytracingLightCullResult, m_LightCullResult);
// Dispatch a compute
int numGroupsX = 8;
int numGroupsY = 8;
int numGroupsZ = 4;
cmd.DispatchCompute(lightClusterCS, lightClusterKernel, numGroupsX, numGroupsY, numGroupsZ);
}
}
public void RegisterEnvironment(HDRaytracingEnvironment targetEnvironment)
{
if (!m_Environments.Contains(targetEnvironment))
{
m_Environments.Add(targetEnvironment);
m_DirtyEnvironment = true;
}
}
public void UnregisterEnvironment(HDRaytracingEnvironment targetEnvironment)
{
if (m_Environments.Contains(targetEnvironment))
{
// Add this graph
m_Environments.Remove(targetEnvironment);
m_DirtyEnvironment = true;
}
}
public bool ValidIndirectDiffuseState()
{
// First thing to check is: Do we have a valid ray-tracing environment?
HDRaytracingEnvironment rtEnvironement = m_RaytracingManager.CurrentEnvironment();
RaytracingShader indirectDiffuseShader = m_PipelineAsset.renderPipelineResources.shaders.indirectDiffuseRaytracing;
return(!(rtEnvironement == null || !rtEnvironement.raytracedIndirectDiffuse ||
indirectDiffuseShader == null ||
m_PipelineResources.textures.owenScrambledTex == null || m_PipelineResources.textures.scramblingTex == null));
}
public bool ValidIndirectDiffuseState()
{
// First thing to check is: Do we have a valid ray-tracing environment?
HDRaytracingEnvironment rtEnvironment = m_RaytracingManager.CurrentEnvironment();
RayTracingShader indirectDiffuseShader = m_PipelineAsset.renderPipelineRayTracingResources.indirectDiffuseRaytracing;
var settings = VolumeManager.instance.stack.GetComponent <GlobalIllumination>();
return(!(rtEnvironment == null || !settings.enableRayTracing.value ||
indirectDiffuseShader == null ||
m_PipelineResources.textures.owenScrambledTex == null || m_PipelineResources.textures.scramblingTex == null));
}
public void RegisterEnvironment(HDRaytracingEnvironment targetEnvironment)
{
if (!m_Environments.Contains(targetEnvironment))
{
// Add this env to the list of environments
m_Environments.Add(targetEnvironment);
m_DirtyEnvironment = true;
// Now that a new environment has been set, we need to update
UpdateEnvironmentSubScenes();
}
}
public void UnregisterEnvironment(HDRaytracingEnvironment targetEnvironment)
{
if (m_Environments.Contains(targetEnvironment))
{
// Add this graph
m_Environments.Remove(targetEnvironment);
m_DirtyEnvironment = true;
// Now that a new environement has been removed, we need to update
UpdateEnvironmentSubScenes();
}
}
// This function finds which subscenes are going to be used for the camera and computes their light clusters
public void UpdateCameraData(CommandBuffer cmd, HDCamera hdCamera)
{
// Set all the acceleration structures that are currently allocated to not updated
foreach (var subScene in m_SubScenes)
{
subScene.Value.needUpdate = false;
}
// Grab the current environment
HDRaytracingEnvironment rtEnv = CurrentEnvironment();
if (rtEnv == null)
{
return;
}
// If Reflection is on flag its light cluster
// if (rtEnv.raytracedReflections)
{
HDRayTracingSubScene currentSubScene = RequestSubScene(rtEnv.reflLayerMask);
currentSubScene.needUpdate = true;
}
// If Primary Visibility is on flag its light cluster
// if (rtEnv.raytracedObjects)
{
HDRayTracingSubScene currentSubScene = RequestSubScene(rtEnv.raytracedLayerMask);
currentSubScene.needUpdate = true;
}
// If indirect diffuse is on flag its light cluster
// if (rtEnv.raytracedIndirectDiffuse)
{
HDRayTracingSubScene currentSubScene = RequestSubScene(rtEnv.indirectDiffuseLayerMask);
currentSubScene.needUpdate = true;
}
// Let's go through all the sub-scenes that are flagged needUpdate and update their light clusters
foreach (var subScene in m_SubScenes)
{
HDRayTracingSubScene currentSubScene = subScene.Value;
// If it need update, go through it
if (currentSubScene.needUpdate)
{
// Evaluate the light cluster
currentSubScene.lightCluster.EvaluateLightClusters(cmd, hdCamera, currentSubScene.hdLightArray);
// It doesn't need RAS update anymore
currentSubScene.needUpdate = false;
}
}
}
public void Render(CommandBuffer cmd, HDCamera camera, SharedRTManager sharedRTManager, ScriptableRenderContext renderContext, uint frameCount)
{
#if ENABLE_RAYTRACING
HDRaytracingEnvironment rtEnvironement = m_RayTracingManager.CurrentEnvironment();
if (rtEnvironement != null && rtEnvironement.raytracedAO)
{
m_RaytracingAmbientOcclusion.RenderAO(camera, cmd, m_AmbientOcclusionTex, renderContext, frameCount);
}
else
#endif
{
Dispatch(cmd, camera, sharedRTManager);
PostDispatchWork(cmd, camera, sharedRTManager);
}
}
public void RenderReflectionsT2(HDCamera hdCamera, CommandBuffer cmd, RTHandleSystem.RTHandle outputTexture, ScriptableRenderContext renderContext, int frameCount)
{
// First thing to check is: Do we have a valid ray-tracing environment?
HDRaytracingEnvironment rtEnvironment = m_RayTracingManager.CurrentEnvironment();
// If no acceleration structure available, end it now
if (rtEnvironment == null)
{
return;
}
// 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>();
// Bind all the required data for ray tracing
BindRayTracedReflectionData(cmd, hdCamera, rtEnvironment, reflectionShader, settings, lightClusterSettings);
// Force to disable specular lighting
cmd.SetGlobalInt(HDShaderIDs._EnableSpecularLighting, 0);
// Run the computation
cmd.DispatchRays(reflectionShader, m_RayGenIntegrationName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
// Restore the previous state of specular lighting
cmd.SetGlobalInt(HDShaderIDs._EnableSpecularLighting, hdCamera.frameSettings.IsEnabled(FrameSettingsField.SpecularLighting) ? 1 : 0);
using (new ProfilingSample(cmd, "Filter Reflection", CustomSamplerId.RaytracingFilterReflection.GetSampler()))
{
if (settings.enableFilter.value)
{
// Grab the history buffer
RTHandleSystem.RTHandle reflectionHistory = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedReflection)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedReflection, ReflectionHistoryBufferAllocatorFunction, 1);
HDSimpleDenoiser simpleDenoiser = m_RayTracingManager.GetSimpleDenoiser();
simpleDenoiser.DenoiseBuffer(cmd, hdCamera, m_ReflIntermediateTexture0, reflectionHistory, outputTexture, settings.filterRadius.value, singleChannel: false);
}
else
{
HDUtils.BlitCameraTexture(cmd, m_ReflIntermediateTexture0, outputTexture);
}
}
}
void EvaluateClusterDebugView(CommandBuffer cmd, HDCamera hdCamera, HDRaytracingEnvironment currentEnv)
{
ComputeShader lightClusterDebugCS = m_RenderPipelineRayTracingResources.lightClusterDebugCS;
if (lightClusterDebugCS == null)
{
return;
}
Texture2D gradientTexture = m_RenderPipelineResources.textures.colorGradient;
if (gradientTexture == null)
{
return;
}
var settings = VolumeManager.instance.stack.GetComponent <LightCluster>();
// Grab the kernel
int m_LightClusterDebugKernel = lightClusterDebugCS.FindKernel("DebugLightCluster");
// Inject all the parameters to the debug compute
cmd.SetComputeBufferParam(lightClusterDebugCS, m_LightClusterDebugKernel, _RaytracingLightCluster, m_LightCluster);
cmd.SetComputeVectorParam(lightClusterDebugCS, _MinClusterPos, minClusterPos);
cmd.SetComputeVectorParam(lightClusterDebugCS, _MaxClusterPos, maxClusterPos);
cmd.SetComputeVectorParam(lightClusterDebugCS, _ClusterCellSize, clusterCellSize);
cmd.SetComputeFloatParam(lightClusterDebugCS, _LightPerCellCount, HDShadowUtils.Asfloat(settings.maxNumLightsPercell.value));
cmd.SetComputeTextureParam(lightClusterDebugCS, m_LightClusterDebugKernel, _DebugColorGradientTexture, gradientTexture);
cmd.SetComputeTextureParam(lightClusterDebugCS, m_LightClusterDebugKernel, HDShaderIDs._CameraDepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
// Target output texture
cmd.SetComputeTextureParam(lightClusterDebugCS, m_LightClusterDebugKernel, _DebutLightClusterTexture, m_DebugLightClusterTexture);
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
// Dispatch the compute
int lightVolumesTileSize = 8;
int numTilesX = (texWidth + (lightVolumesTileSize - 1)) / lightVolumesTileSize;
int numTilesY = (texHeight + (lightVolumesTileSize - 1)) / lightVolumesTileSize;
cmd.DispatchCompute(lightClusterDebugCS, m_LightClusterDebugKernel, numTilesX, numTilesY, 1);
}
public void EvaluateLightClusters(CommandBuffer cmd, HDCamera hdCamera, List <HDAdditionalLightData> lightArray)
{
// Grab the current ray-tracing environment, if no environment available stop right away
HDRaytracingEnvironment currentEnv = m_RaytracingManager.CurrentEnvironment();
ComputeShader lightClusterCS = m_RenderPipelineResources.shaders.lightClusterBuildCS;
// If there is no area light to process or no environment not the shader is missing
if (currentEnv == null || lightClusterCS == null || lightArray.Count == 0)
{
// Invalidate the cluster's bounds so that we never access the buffer
minClusterPos.Set(float.MaxValue, float.MaxValue, float.MaxValue);
maxClusterPos.Set(-float.MaxValue, -float.MaxValue, -float.MaxValue);
punctualLightCount = 0;
areaLightCount = 0;
// Make sure the buffer is at least of size 1
if (m_LightCluster.count != 1)
{
ResizeClusterBuffer(1);
}
return;
}
// Build the Light volumes
BuildGPULightVolumes(lightArray);
// Evaluate the volume of the cluster
EvaluateClusterVolume(currentEnv, hdCamera, lightArray.Count);
// Cull the lights within the evaluated cluster range
CullLights(cmd, lightClusterCS, lightArray.Count);
// Build the light Cluster
BuildLightCluster(cmd, lightClusterCS, currentEnv, lightArray.Count);
// Build the light data
BuildLightData(cmd, hdCamera, lightArray);
// Generate the debug view
EvaluateClusterDebugView(cmd, hdCamera, currentEnv);
}
public void EvaluateLightClusters(CommandBuffer cmd, HDCamera hdCamera, List <HDAdditionalLightData> lightArray)
{
// If there is no area light to process, nothing to do here
if (lightArray.Count == 0)
{
return;
}
// Grab the current ray-tracing environment, if no environment available stop right away
HDRaytracingEnvironment currentEnv = m_RaytracingManager.CurrentEnvironment();
if (currentEnv == null)
{
return;
}
ComputeShader lightClusterCS = m_RenderPipelineResources.shaders.lightClusterBuildCS;
if (lightClusterCS == null)
{
return;
}
// Build the Light volumes
BuildGPULightVolumes(lightArray);
// Evaluate the volume of the cluster
EvaluateClusterVolume(currentEnv, hdCamera, lightArray.Count);
// Cull the lights within the evaluated cluster range
CullLights(cmd, lightClusterCS, lightArray.Count);
// Build the light Cluster
BuildLightCluster(cmd, lightClusterCS, currentEnv, lightArray.Count);
// Build the light data
BuildLightData(cmd, hdCamera, lightArray);
// Generate the debug view
EvaluateClusterDebugView(cmd, hdCamera, currentEnv);
}
// This function is to be called when the layers used for an effect have changed. It is called either through the inspector or using the scripting API
public void UpdateEnvironmentSubScenes()
{
// Grab the current environment
HDRaytracingEnvironment rtEnv = CurrentEnvironment();
// We do not have any current environment, we need to clear all the subscenes we have and leave.
if (rtEnv == null)
{
foreach (var subScene in m_SubScenes)
{
// Destroy the sub-scene to remove
HDRayTracingSubScene currentSubscene = subScene.Value;
DestroySubSceneStructure(ref currentSubscene);
}
m_SubScenes.Clear();
return;
}
// Update the references for the sub-scenes
UpdateEffectSubScene(rtEnv.aoLayerMask.value, 0);
UpdateEffectSubScene(rtEnv.reflLayerMask.value, 1);
UpdateEffectSubScene(rtEnv.shadowLayerMask.value, 2);
UpdateEffectSubScene(rtEnv.raytracedLayerMask.value, 3);
UpdateEffectSubScene(rtEnv.indirectDiffuseLayerMask.value, 4);
// Let's now go through all the sub-scenes and delete the ones that are not referenced by anyone
var nonReferencedSubScenes = m_SubScenes.Where(x => x.Value.references == 0).ToArray();
foreach (var subScene in nonReferencedSubScenes)
{
// Destroy the sub-scene to remove
HDRayTracingSubScene currentSubscene = subScene.Value;
DestroySubSceneStructure(ref currentSubscene);
// Remove it from the array
m_SubScenes.Remove(subScene.Key);
}
}
public bool RenderAreaShadows(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, uint frameCount)
{
// NOTE: Here we cannot clear the area shadow texture because it is a texture array. So we need to bind it and make sure no material will try to read it in the shaders
BindShadowTexture(cmd);
// Let's check all the resources and states to see if we should render the effect
HDRaytracingEnvironment rtEnvironement = m_RaytracingManager.CurrentEnvironment();
RaytracingShader shadowRaytrace = m_PipelineAsset.renderPipelineResources.shaders.areaShadowsRaytracingRT;
ComputeShader shadowsCompute = m_PipelineAsset.renderPipelineResources.shaders.areaShadowRaytracingCS;
ComputeShader shadowFilter = m_PipelineAsset.renderPipelineResources.shaders.areaShadowFilterCS;
// Make sure everything is valid
bool invalidState = rtEnvironement == null || rtEnvironement.raytracedShadows == false ||
hdCamera.frameSettings.litShaderMode != LitShaderMode.Deferred ||
shadowRaytrace == null || shadowsCompute == null || shadowFilter == null ||
m_PipelineResources.textures.owenScrambledTex == null || m_PipelineResources.textures.scramblingTex == null;
// If invalid state or ray-tracing acceleration structure, we stop right away
if (invalidState)
{
return(false);
}
// Grab the TAA history buffers (SN/UN and Analytic value)
RTHandleSystem.RTHandle areaShadowHistoryArray = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedAreaShadow)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedAreaShadow, AreaShadowHistoryBufferAllocatorFunction, 1);
RTHandleSystem.RTHandle areaAnalyticHistoryArray = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedAreaAnalytic)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedAreaAnalytic, AreaAnalyticHistoryBufferAllocatorFunction, 1);
// Grab the acceleration structure for the target camera
RaytracingAccelerationStructure accelerationStructure = m_RaytracingManager.RequestAccelerationStructure(rtEnvironement.shadowLayerMask);
// Define the shader pass to use for the reflection pass
cmd.SetRaytracingShaderPass(shadowRaytrace, "VisibilityDXR");
// Set the acceleration structure for the pass
cmd.SetRaytracingAccelerationStructure(shadowRaytrace, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
cmd.SetGlobalTexture(HDShaderIDs._OwenScrambledTexture, m_PipelineResources.textures.owenScrambledTex);
cmd.SetGlobalTexture(HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)frameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Grab the Filtering Kernels
int copyTAAHistoryKernel = shadowFilter.FindKernel("AreaShadowCopyTAAHistory");
int applyTAAKernel = shadowFilter.FindKernel("AreaShadowApplyTAA");
int updateAnalyticHistory = shadowFilter.FindKernel("AreaAnalyticHistoryUpdate");
int estimateNoiseKernel = shadowFilter.FindKernel("AreaShadowEstimateNoise");
int firstDenoiseKernel = shadowFilter.FindKernel("AreaShadowDenoiseFirstPass");
int secondDenoiseKernel = shadowFilter.FindKernel("AreaShadowDenoiseSecondPass");
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesX = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesY = (texHeight + (areaTileSize - 1)) / areaTileSize;
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironement.rayBias);
int numLights = m_LightLoop.m_lightList.lights.Count;
for (int lightIdx = 0; lightIdx < numLights; ++lightIdx)
{
// If this is not a rectangular area light or it won't have shadows, skip it
if (m_LightLoop.m_lightList.lights[lightIdx].lightType != GPULightType.Rectangle || m_LightLoop.m_lightList.lights[lightIdx].rayTracedAreaShadowIndex == -1)
{
continue;
}
using (new ProfilingSample(cmd, "Raytrace Area Shadow", CustomSamplerId.RaytracingShadowIntegration.GetSampler()))
{
LightData currentLight = m_LightLoop.m_lightList.lights[lightIdx];
// We need to build the world to area light matrix
worldToLocalArea.SetColumn(0, currentLight.right);
worldToLocalArea.SetColumn(1, currentLight.up);
worldToLocalArea.SetColumn(2, currentLight.forward);
// Compensate the relative rendering if active
Vector3 lightPositionWS = currentLight.positionRWS;
if (ShaderConfig.s_CameraRelativeRendering != 0)
{
lightPositionWS += hdCamera.camera.transform.position;
}
worldToLocalArea.SetColumn(3, lightPositionWS);
worldToLocalArea.m33 = 1.0f;
worldToLocalArea = worldToLocalArea.inverse;
// We have noticed from extensive profiling that ray-trace shaders are not as effective for running per-pixel computation. In order to reduce that,
// we do a first prepass that compute the analytic term and probability and generates the first integration sample
if (rtEnvironement.splitIntegration)
{
int shadowComputeKernel = shadowsCompute.FindKernel("RaytracingAreaShadowPrepass");
// This pass evaluates the analytic value and the generates and outputs the first sample
cmd.SetComputeBufferParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._LightDatas, m_LightLoop.lightDatas);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingTargetAreaLight, lightIdx);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingNumSamples, rtEnvironement.shadowNumSamples);
cmd.SetComputeMatrixParam(shadowsCompute, HDShaderIDs._RaytracingAreaWorldToLocal, worldToLocalArea);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[0], m_GbufferManager.GetBuffer(0));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[1], m_GbufferManager.GetBuffer(1));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[2], m_GbufferManager.GetBuffer(2));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[3], m_GbufferManager.GetBuffer(3));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._AreaCookieTextures, m_LightLoop.areaLightCookieManager.GetTexCache());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedAreaShadowIntegration, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedAreaShadowSample, m_DenoiseBuffer1);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracingDistanceBuffer, m_RaytracingDistanceBuffer);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.DispatchCompute(shadowsCompute, shadowComputeKernel, numTilesX, numTilesY, 1);
// This pass will use the previously generated sample and add it to the integration buffer
cmd.SetRaytracingBufferParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._LightDatas, m_LightLoop.lightDatas);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._RaytracedAreaShadowSample, m_DenoiseBuffer1);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._RaytracedAreaShadowIntegration, m_DenoiseBuffer0);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._RaytracingDistanceBuffer, m_RaytracingDistanceBuffer);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.DispatchRays(shadowRaytrace, m_RayGenShadowSingleName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
// Let's do the following samples (if any)
for (int sampleIndex = 1; sampleIndex < rtEnvironement.shadowNumSamples; ++sampleIndex)
{
shadowComputeKernel = shadowsCompute.FindKernel("RaytracingAreaShadowNewSample");
// This pass generates a new sample based on the initial pre-pass
cmd.SetComputeBufferParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._LightDatas, m_LightLoop.lightDatas);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingTargetAreaLight, lightIdx);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingNumSamples, rtEnvironement.shadowNumSamples);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingSampleIndex, sampleIndex);
cmd.SetComputeMatrixParam(shadowsCompute, HDShaderIDs._RaytracingAreaWorldToLocal, worldToLocalArea);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[0], m_GbufferManager.GetBuffer(0));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[1], m_GbufferManager.GetBuffer(1));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[2], m_GbufferManager.GetBuffer(2));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[3], m_GbufferManager.GetBuffer(3));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._AreaCookieTextures, m_LightLoop.areaLightCookieManager.GetTexCache());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedAreaShadowIntegration, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedAreaShadowSample, m_DenoiseBuffer1);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracingDistanceBuffer, m_RaytracingDistanceBuffer);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.DispatchCompute(shadowsCompute, shadowComputeKernel, numTilesX, numTilesY, 1);
// This pass will use the previously generated sample and add it to the integration buffer
cmd.SetRaytracingBufferParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._LightDatas, m_LightLoop.lightDatas);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._RaytracedAreaShadowSample, m_DenoiseBuffer1);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._RaytracedAreaShadowIntegration, m_DenoiseBuffer0);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._RaytracingDistanceBuffer, m_RaytracingDistanceBuffer);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.DispatchRays(shadowRaytrace, m_RayGenShadowSingleName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
}
}
else
{
// This pass generates the analytic value and will do the full integration
cmd.SetRaytracingBufferParam(shadowRaytrace, m_RayGenShaderName, HDShaderIDs._LightDatas, m_LightLoop.lightDatas);
cmd.SetRaytracingIntParam(shadowRaytrace, HDShaderIDs._RaytracingTargetAreaLight, lightIdx);
cmd.SetRaytracingIntParam(shadowRaytrace, HDShaderIDs._RaytracingNumSamples, rtEnvironement.shadowNumSamples);
cmd.SetRaytracingMatrixParam(shadowRaytrace, HDShaderIDs._RaytracingAreaWorldToLocal, worldToLocalArea);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShaderName, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShaderName, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShaderName, HDShaderIDs._GBufferTexture[0], m_GbufferManager.GetBuffer(0));
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShaderName, HDShaderIDs._GBufferTexture[1], m_GbufferManager.GetBuffer(1));
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShaderName, HDShaderIDs._GBufferTexture[2], m_GbufferManager.GetBuffer(2));
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShaderName, HDShaderIDs._GBufferTexture[3], m_GbufferManager.GetBuffer(3));
cmd.SetRaytracingIntParam(shadowRaytrace, HDShaderIDs._RayCountEnabled, m_RaytracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShaderName, HDShaderIDs._RayCountTexture, m_RaytracingManager.rayCountManager.rayCountTexture);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShaderName, HDShaderIDs._AreaCookieTextures, m_LightLoop.areaLightCookieManager.GetTexCache());
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShaderName, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShaderName, HDShaderIDs._RaytracedAreaShadowIntegration, m_DenoiseBuffer0);
cmd.DispatchRays(shadowRaytrace, m_RayGenShaderName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
}
}
using (new ProfilingSample(cmd, "Combine Area Shadow", CustomSamplerId.RaytracingShadowCombination.GetSampler()))
{
// Global parameters
cmd.SetComputeIntParam(shadowFilter, HDShaderIDs._RaytracingDenoiseRadius, rtEnvironement.shadowFilterRadius);
cmd.SetComputeIntParam(shadowFilter, HDShaderIDs._RaytracingShadowSlot, m_LightLoop.m_lightList.lights[lightIdx].rayTracedAreaShadowIndex);
// Given that we can't read and write into the same buffer, we store the current frame value and the history in the denoisebuffer1
cmd.SetComputeTextureParam(shadowFilter, copyTAAHistoryKernel, HDShaderIDs._AreaShadowHistoryRW, areaShadowHistoryArray);
cmd.SetComputeTextureParam(shadowFilter, copyTAAHistoryKernel, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(shadowFilter, copyTAAHistoryKernel, HDShaderIDs._DenoiseOutputTextureRW, m_DenoiseBuffer1);
cmd.DispatchCompute(shadowFilter, copyTAAHistoryKernel, numTilesX, numTilesY, 1);
// Apply a vectorized temporal filtering pass and store it back in the denoisebuffer0 with the analytic value in the third channel
var historyScale = new Vector2(hdCamera.actualWidth / (float)areaShadowHistoryArray.rt.width, hdCamera.actualHeight / (float)areaShadowHistoryArray.rt.height);
cmd.SetComputeVectorParam(shadowFilter, HDShaderIDs._ScreenToTargetScaleHistory, historyScale);
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._AnalyticHistoryBuffer, areaAnalyticHistoryArray);
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer1);
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._DenoiseOutputTextureRW, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._AreaShadowHistoryRW, areaShadowHistoryArray);
cmd.DispatchCompute(shadowFilter, applyTAAKernel, numTilesX, numTilesY, 1);
// Now that we do not need it anymore, update the anyltic history
cmd.SetComputeTextureParam(shadowFilter, updateAnalyticHistory, HDShaderIDs._AnalyticHistoryBuffer, areaAnalyticHistoryArray);
cmd.SetComputeTextureParam(shadowFilter, updateAnalyticHistory, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.DispatchCompute(shadowFilter, updateAnalyticHistory, numTilesX, numTilesY, 1);
if (rtEnvironement.shadowFilterRadius > 0)
{
// Inject parameters for noise estimation
cmd.SetComputeTextureParam(shadowFilter, estimateNoiseKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowFilter, estimateNoiseKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowFilter, estimateNoiseKernel, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
// Noise estimation pre-pass
cmd.SetComputeTextureParam(shadowFilter, estimateNoiseKernel, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(shadowFilter, estimateNoiseKernel, HDShaderIDs._DenoiseOutputTextureRW, m_DenoiseBuffer1);
cmd.DispatchCompute(shadowFilter, estimateNoiseKernel, numTilesX, numTilesY, 1);
// Reinject parameters for denoising
cmd.SetComputeTextureParam(shadowFilter, firstDenoiseKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowFilter, firstDenoiseKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowFilter, firstDenoiseKernel, HDShaderIDs._AreaShadowTextureRW, m_AreaShadowTextureArray);
// First denoising pass
cmd.SetComputeTextureParam(shadowFilter, firstDenoiseKernel, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer1);
cmd.SetComputeTextureParam(shadowFilter, firstDenoiseKernel, HDShaderIDs._DenoiseOutputTextureRW, m_DenoiseBuffer0);
cmd.DispatchCompute(shadowFilter, firstDenoiseKernel, numTilesX, numTilesY, 1);
}
// Reinject parameters for denoising
cmd.SetComputeTextureParam(shadowFilter, secondDenoiseKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowFilter, secondDenoiseKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowFilter, secondDenoiseKernel, HDShaderIDs._AreaShadowTextureRW, m_AreaShadowTextureArray);
// Second (and final) denoising pass
cmd.SetComputeTextureParam(shadowFilter, secondDenoiseKernel, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer0);
cmd.DispatchCompute(shadowFilter, secondDenoiseKernel, numTilesX, numTilesY, 1);
}
}
// If this is the right debug mode and we have at least one light, write the first shadow to the denoise texture
HDRenderPipeline hdrp = (RenderPipelineManager.currentPipeline as HDRenderPipeline);
if (FullScreenDebugMode.RaytracedAreaShadow == hdrp.m_CurrentDebugDisplaySettings.data.fullScreenDebugMode && numLights > 0)
{
int targetKernel = shadowFilter.FindKernel("WriteShadowTextureDebug");
cmd.SetComputeIntParam(shadowFilter, HDShaderIDs._RaytracingShadowSlot, 0);
cmd.SetComputeTextureParam(shadowFilter, targetKernel, HDShaderIDs._AreaShadowTextureRW, m_AreaShadowTextureArray);
cmd.SetComputeTextureParam(shadowFilter, targetKernel, HDShaderIDs._DenoiseOutputTextureRW, m_DenoiseBuffer0);
cmd.DispatchCompute(shadowFilter, targetKernel, numTilesX, numTilesY, 1);
hdrp.PushFullScreenDebugTexture(hdCamera, cmd, m_DenoiseBuffer0, FullScreenDebugMode.RaytracedAreaShadow);
}
return(true);
}
public void Render(HDCamera hdCamera, CommandBuffer cmd, RTHandleSystem.RTHandle outputTexture, ScriptableRenderContext renderContext, CullingResults cull)
{
// First thing to check is: Do we have a valid ray-tracing environment?
HDRaytracingEnvironment rtEnvironement = m_RaytracingManager.CurrentEnvironment();
LightLoop lightLoop = m_RaytracingManager.GetLightLoop();
RaytracingShader forwardShader = m_PipelineAsset.renderPipelineResources.shaders.forwardRaytracing;
Shader raytracingMask = m_PipelineAsset.renderPipelineResources.shaders.raytracingFlagMask;
// Check the validity of the state before computing the effect
bool invalidState = rtEnvironement == null || !rtEnvironement.raytracedObjects ||
forwardShader == null || raytracingMask == null ||
m_PipelineResources.textures.owenScrambledTex == null || m_PipelineResources.textures.scramblingTex == null;
// If any resource or game-object is missing We stop right away
if (invalidState)
{
return;
}
// Grab the acceleration structure and the list of HD lights for the target camera
RaytracingAccelerationStructure accelerationStructure = m_RaytracingManager.RequestAccelerationStructure(rtEnvironement.raytracedLayerMask);
HDRaytracingLightCluster lightCluster = m_RaytracingManager.RequestLightCluster(rtEnvironement.raytracedLayerMask);
if (m_RaytracingFlagMaterial == null)
{
m_RaytracingFlagMaterial = CoreUtils.CreateEngineMaterial(raytracingMask);
}
// Before going into raytracing, we need to flag which pixels needs to be raytracing
EvaluateRaytracingMask(cull, hdCamera, cmd, renderContext);
// 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, m_RayGenShaderName, HDShaderIDs._OwenScrambledTexture, m_PipelineResources.textures.owenScrambledTex);
cmd.SetRaytracingTextureParam(forwardShader, m_RayGenShaderName, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironement.rayBias);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayMaxLength, rtEnvironement.raytracingRayLength);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingMaxRecursion, rtEnvironement.rayMaxDepth);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingCameraNearPlane, hdCamera.camera.nearClipPlane);
// Set the data for the ray generation
cmd.SetRaytracingTextureParam(forwardShader, m_RayGenShaderName, HDShaderIDs._RaytracingFlagMask, m_RaytracingFlagTarget);
cmd.SetRaytracingTextureParam(forwardShader, m_RayGenShaderName, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRaytracingTextureParam(forwardShader, m_RayGenShaderName, HDShaderIDs._CameraColorTextureRW, outputTexture);
// Compute an approximate pixel spread angle value (in radians)
float pixelSpreadAngle = hdCamera.camera.fieldOfView * (Mathf.PI / 180.0f) / Mathf.Min(hdCamera.actualWidth, hdCamera.actualHeight);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingPixelSpreadAngle, pixelSpreadAngle);
// 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, rtEnvironement.maxNumLightsPercell);
cmd.SetGlobalInt(HDShaderIDs._PunctualLightCountRT, lightCluster.GetPunctualLightCount());
cmd.SetGlobalInt(HDShaderIDs._AreaLightCountRT, lightCluster.GetAreaLightCount());
// Note: Just in case, we rebind the directional light data (in case they were not)
cmd.SetGlobalBuffer(HDShaderIDs._DirectionalLightDatas, lightLoop.directionalLightDatas);
cmd.SetGlobalInt(HDShaderIDs._DirectionalLightCount, lightLoop.m_lightList.directionalLights.Count);
// Set the data for the ray miss
cmd.SetRaytracingTextureParam(forwardShader, m_MissShaderName, HDShaderIDs._SkyTexture, m_SkyManager.skyReflection);
// If this is the right debug mode and we have at least one light, write the first shadow to the denoise texture
HDRenderPipeline hdrp = (RenderPipelineManager.currentPipeline as HDRenderPipeline);
cmd.SetRaytracingTextureParam(forwardShader, m_RayGenShaderName, HDShaderIDs._RaytracingPrimaryDebug, m_DebugRaytracingTexture);
hdrp.PushFullScreenDebugTexture(hdCamera, cmd, m_DebugRaytracingTexture, FullScreenDebugMode.PrimaryVisibility);
// Run the calculus
cmd.DispatchRays(forwardShader, m_RayGenShaderName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
}
public bool RenderIndirectDiffuse(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, uint frameCount)
{
// Bind the indirect diffuse texture
BindIndirectDiffuseTexture(cmd);
// First thing to check is: Do we have a valid ray-tracing environment?
HDRaytracingEnvironment rtEnvironement = m_RaytracingManager.CurrentEnvironment();
RaytracingShader indirectDiffuseShader = m_PipelineAsset.renderPipelineResources.shaders.indirectDiffuseRaytracing;
ComputeShader indirectDiffuseAccumulation = m_PipelineAsset.renderPipelineResources.shaders.indirectDiffuseAccumulation;
bool invalidState = rtEnvironement == null || !rtEnvironement.raytracedIndirectDiffuse ||
indirectDiffuseShader == null || indirectDiffuseAccumulation == null ||
m_PipelineResources.textures.owenScrambledTex == null || m_PipelineResources.textures.scramblingTex == null;
// If no acceleration structure available, end it now
if (!ValidIndirectDiffuseState())
{
return(false);
}
// Grab the acceleration structures and the light cluster to use
RaytracingAccelerationStructure accelerationStructure = m_RaytracingManager.RequestAccelerationStructure(rtEnvironement.indirectDiffuseLayerMask);
HDRaytracingLightCluster lightCluster = m_RaytracingManager.RequestLightCluster(rtEnvironement.indirectDiffuseLayerMask);
// Compute the actual resolution that is needed base on the quality
string targetRayGen = m_RayGenIndirectDiffuseName;
// Define the shader pass to use for the indirect diffuse pass
cmd.SetRaytracingShaderPass(indirectDiffuseShader, "IndirectDXR");
// Set the acceleration structure for the pass
cmd.SetRaytracingAccelerationStructure(indirectDiffuseShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
cmd.SetRaytracingTextureParam(indirectDiffuseShader, targetRayGen, HDShaderIDs._OwenScrambledTexture, m_PipelineResources.textures.owenScrambledTex);
cmd.SetRaytracingTextureParam(indirectDiffuseShader, targetRayGen, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironement.rayBias);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayMaxLength, rtEnvironement.indirectDiffuseRayLength);
cmd.SetRaytracingIntParams(indirectDiffuseShader, HDShaderIDs._RaytracingNumSamples, rtEnvironement.indirectDiffuseNumSamples);
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)frameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Set the data for the ray generation
cmd.SetRaytracingTextureParam(indirectDiffuseShader, targetRayGen, HDShaderIDs._IndirectDiffuseTextureRW, m_IndirectDiffuseTexture);
cmd.SetRaytracingTextureParam(indirectDiffuseShader, targetRayGen, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRaytracingTextureParam(indirectDiffuseShader, targetRayGen, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
// Set the indirect diffuse parameters
cmd.SetRaytracingFloatParams(indirectDiffuseShader, HDShaderIDs._RaytracingIntensityClamp, rtEnvironement.indirectDiffuseClampValue);
// Set ray count tex
cmd.SetRaytracingIntParam(indirectDiffuseShader, HDShaderIDs._RayCountEnabled, m_RaytracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRaytracingTextureParam(indirectDiffuseShader, targetRayGen, HDShaderIDs._RayCountTexture, m_RaytracingManager.rayCountManager.rayCountTexture);
// Compute the pixel spread value
float pixelSpreadAngle = Mathf.Atan(2.0f * Mathf.Tan(hdCamera.camera.fieldOfView * Mathf.PI / 360.0f) / Mathf.Min(hdCamera.actualWidth, hdCamera.actualHeight));
cmd.SetRaytracingFloatParam(indirectDiffuseShader, HDShaderIDs._RaytracingPixelSpreadAngle, pixelSpreadAngle);
// LightLoop data
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, rtEnvironement.maxNumLightsPercell);
cmd.SetGlobalInt(HDShaderIDs._PunctualLightCountRT, lightCluster.GetPunctualLightCount());
cmd.SetGlobalInt(HDShaderIDs._AreaLightCountRT, lightCluster.GetAreaLightCount());
// Set the data for the ray miss
cmd.SetRaytracingTextureParam(indirectDiffuseShader, m_MissShaderName, HDShaderIDs._SkyTexture, m_SkyManager.skyReflection);
// Compute the actual resolution that is needed base on the quality
int widthResolution = hdCamera.actualWidth;
int heightResolution = hdCamera.actualHeight;
// Run the calculus
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTING_ONLY", true);
cmd.DispatchRays(indirectDiffuseShader, targetRayGen, (uint)widthResolution, (uint)heightResolution, 1);
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTING_ONLY", false);
switch (rtEnvironement.indirectDiffuseFilterMode)
{
case HDRaytracingEnvironment.IndirectDiffuseFilterMode.SpatioTemporal:
{
// Grab the history buffer
RTHandleSystem.RTHandle indirectDiffuseHistory = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedIndirectDiffuse)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedIndirectDiffuse, IndirectDiffuseHistoryBufferAllocatorFunction, 1);
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesX = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesY = (texHeight + (areaTileSize - 1)) / areaTileSize;
int m_KernelFilter = indirectDiffuseAccumulation.FindKernel("RaytracingIndirectDiffuseTAA");
// Compute the combined TAA frame
var historyScale = new Vector2(hdCamera.actualWidth / (float)indirectDiffuseHistory.rt.width, hdCamera.actualHeight / (float)indirectDiffuseHistory.rt.height);
cmd.SetComputeVectorParam(indirectDiffuseAccumulation, HDShaderIDs._ScreenToTargetScaleHistory, historyScale);
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, m_KernelFilter, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, m_KernelFilter, HDShaderIDs._DenoiseInputTexture, m_IndirectDiffuseTexture);
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, m_KernelFilter, HDShaderIDs._DenoiseOutputTextureRW, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, m_KernelFilter, HDShaderIDs._IndirectDiffuseHistorybufferRW, indirectDiffuseHistory);
cmd.DispatchCompute(indirectDiffuseAccumulation, m_KernelFilter, numTilesX, numTilesY, 1);
// Output the new history
HDUtils.BlitCameraTexture(cmd, hdCamera, m_DenoiseBuffer0, indirectDiffuseHistory);
m_KernelFilter = indirectDiffuseAccumulation.FindKernel("IndirectDiffuseFilterH");
// Horizontal pass of the bilateral filter
cmd.SetComputeIntParam(indirectDiffuseAccumulation, HDShaderIDs._RaytracingDenoiseRadius, rtEnvironement.indirectDiffuseFilterRadius);
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, m_KernelFilter, HDShaderIDs._DenoiseInputTexture, indirectDiffuseHistory);
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, m_KernelFilter, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, m_KernelFilter, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, m_KernelFilter, HDShaderIDs._DenoiseOutputTextureRW, m_DenoiseBuffer0);
cmd.DispatchCompute(indirectDiffuseAccumulation, m_KernelFilter, numTilesX, numTilesY, 1);
m_KernelFilter = indirectDiffuseAccumulation.FindKernel("IndirectDiffuseFilterV");
// Horizontal pass of the bilateral filter
cmd.SetComputeIntParam(indirectDiffuseAccumulation, HDShaderIDs._RaytracingDenoiseRadius, rtEnvironement.indirectDiffuseFilterRadius);
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, m_KernelFilter, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, m_KernelFilter, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, m_KernelFilter, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, m_KernelFilter, HDShaderIDs._DenoiseOutputTextureRW, m_IndirectDiffuseTexture);
cmd.DispatchCompute(indirectDiffuseAccumulation, m_KernelFilter, numTilesX, numTilesY, 1);
}
break;
}
// If we are in deferred mode, we need to make sure to add the indirect diffuse (that we intentionally ignored during the gbuffer pass)
// Note that this discards the texture/object ambient occlusion. But we consider that okay given that the raytraced indirect diffuse
// is a physically correct evaluation of that quantity
if (hdCamera.frameSettings.litShaderMode == LitShaderMode.Deferred)
{
int indirectDiffuseKernel = indirectDiffuseAccumulation.FindKernel("IndirectDiffuseAccumulation");
// Bind the source texture
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, indirectDiffuseKernel, HDShaderIDs._IndirectDiffuseTexture, m_IndirectDiffuseTexture);
// Bind the output texture
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, indirectDiffuseKernel, HDShaderIDs._GBufferTexture[0], m_GBufferManager.GetBuffer(0));
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, indirectDiffuseKernel, HDShaderIDs._GBufferTexture[3], m_GBufferManager.GetBuffer(3));
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesX = (widthResolution + (areaTileSize - 1)) / areaTileSize;
int numTilesY = (heightResolution + (areaTileSize - 1)) / areaTileSize;
// Add the indirect diffuse to the gbuffer
cmd.DispatchCompute(indirectDiffuseAccumulation, indirectDiffuseKernel, numTilesX, numTilesY, 1);
}
return(true);
}
public void RenderAO(HDCamera hdCamera, CommandBuffer cmd, RTHandleSystem.RTHandle outputTexture, ScriptableRenderContext renderContext, uint frameCount)
{
// Let's check all the resources
HDRaytracingEnvironment rtEnvironement = m_RaytracingManager.CurrentEnvironment();
BlueNoise blueNoise = m_RaytracingManager.GetBlueNoiseManager();
ComputeShader bilateralFilter = m_PipelineResources.shaders.jointBilateralFilterCS;
RaytracingShader aoShader = m_PipelineResources.shaders.aoRaytracing;
bool missingResources = rtEnvironement == null || blueNoise == null || bilateralFilter == null || aoShader == null ||
m_PipelineResources.textures.owenScrambledTex == null || m_PipelineResources.textures.scramblingTex == null;
// Try to grab the acceleration structure for the target camera
RaytracingAccelerationStructure accelerationStructure = m_RaytracingManager.RequestAccelerationStructure(hdCamera);
// If a resource is missing, the effect is not requested or no acceleration structure, set the default one and leave right away
if (missingResources || !hdCamera.frameSettings.IsEnabled(FrameSettingsField.SSAO) || accelerationStructure == null)
{
SetDefaultAmbientOcclusionTexture(cmd);
return;
}
// 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-tracing sampling data
cmd.SetRaytracingTextureParam(aoShader, m_RayGenShaderName, HDShaderIDs._OwenScrambledTexture, m_PipelineResources.textures.owenScrambledTex);
cmd.SetRaytracingTextureParam(aoShader, m_RayGenShaderName, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
// Inject the ray generation data
cmd.SetRaytracingFloatParams(aoShader, HDShaderIDs._RaytracingRayBias, rtEnvironement.rayBias);
cmd.SetRaytracingFloatParams(aoShader, HDShaderIDs._RaytracingRayMaxLength, rtEnvironement.aoRayLength);
cmd.SetRaytracingIntParams(aoShader, HDShaderIDs._RaytracingNumSamples, rtEnvironement.aoNumSamples);
// Set the data for the ray generation
cmd.SetRaytracingTextureParam(aoShader, m_RayGenShaderName, HDShaderIDs._RaytracingHitDistanceTexture, m_HitDistanceBuffer);
cmd.SetRaytracingTextureParam(aoShader, m_RayGenShaderName, HDShaderIDs._RaytracingVSNormalTexture, m_ViewSpaceNormalBuffer);
cmd.SetRaytracingTextureParam(aoShader, m_RayGenShaderName, HDShaderIDs._AmbientOcclusionTextureRW, m_IntermediateBuffer);
cmd.SetRaytracingTextureParam(aoShader, m_RayGenShaderName, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRaytracingTextureParam(aoShader, m_RayGenShaderName, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)frameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Value used to scale the ao intensity
cmd.SetRaytracingFloatParam(aoShader, HDShaderIDs._RaytracingAOIntensity, VolumeManager.instance.stack.GetComponent <AmbientOcclusion>().intensity.value);
cmd.SetRaytracingIntParam(aoShader, HDShaderIDs._RayCountEnabled, m_RaytracingManager.rayCountManager.rayCountEnabled);
cmd.SetRaytracingTextureParam(aoShader, m_RayGenShaderName, HDShaderIDs._RayCountTexture, m_RaytracingManager.rayCountManager.rayCountTex);
// Run the calculus
cmd.DispatchRays(aoShader, m_RayGenShaderName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
using (new ProfilingSample(cmd, "Filter Reflection", CustomSamplerId.RaytracingAmbientOcclusion.GetSampler()))
{
switch (rtEnvironement.aoFilterMode)
{
case HDRaytracingEnvironment.AOFilterMode.Nvidia:
{
cmd.DenoiseAmbientOcclusionTexture(m_IntermediateBuffer, m_HitDistanceBuffer, m_SharedRTManager.GetDepthStencilBuffer(), m_ViewSpaceNormalBuffer, outputTexture, hdCamera.viewMatrix, hdCamera.projMatrix, (uint)rtEnvironement.maxFilterWidthInPixels, rtEnvironement.filterRadiusInMeters, rtEnvironement.normalSharpness, 1.0f, 0.0f);
}
break;
case HDRaytracingEnvironment.AOFilterMode.Bilateral:
{
m_KernelFilter = bilateralFilter.FindKernel("JointBilateralFilter");
// Inject all the parameters for the compute
cmd.SetComputeIntParam(bilateralFilter, _DenoiseRadius, rtEnvironement.aoBilateralRadius);
cmd.SetComputeFloatParam(bilateralFilter, _GaussianSigma, rtEnvironement.aoBilateralSigma);
cmd.SetComputeTextureParam(bilateralFilter, m_KernelFilter, "_SourceTexture", m_IntermediateBuffer);
cmd.SetComputeTextureParam(bilateralFilter, m_KernelFilter, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(bilateralFilter, m_KernelFilter, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
// Set the output slot
cmd.SetComputeTextureParam(bilateralFilter, m_KernelFilter, "_OutputTexture", outputTexture);
// Texture dimensions
int texWidth = outputTexture.rt.width;
int texHeight = outputTexture.rt.width;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesX = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesY = (texHeight + (areaTileSize - 1)) / areaTileSize;
// Compute the texture
cmd.DispatchCompute(bilateralFilter, m_KernelFilter, numTilesX, numTilesY, 1);
}
break;
case HDRaytracingEnvironment.AOFilterMode.None:
{
HDUtils.BlitCameraTexture(cmd, hdCamera, m_IntermediateBuffer, outputTexture);
}
break;
}
}
// 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 RenderAO(HDCamera hdCamera, CommandBuffer cmd, RTHandleSystem.RTHandle outputTexture, ScriptableRenderContext renderContext, uint frameCount)
{
// Let's check all the resources
HDRaytracingEnvironment rtEnvironement = m_RaytracingManager.CurrentEnvironment();
ComputeShader aoFilter = m_PipelineResources.shaders.raytracingAOFilterCS;
RaytracingShader aoShader = m_PipelineResources.shaders.aoRaytracing;
var aoSettings = VolumeManager.instance.stack.GetComponent <AmbientOcclusion>();
// Check if the state is valid for evaluating ambient occlusion
bool invalidState = rtEnvironement == null ||
aoFilter == null || aoShader == null ||
m_PipelineResources.textures.owenScrambledTex == null || m_PipelineResources.textures.scramblingTex == null ||
!(hdCamera.frameSettings.IsEnabled(FrameSettingsField.SSAO) && aoSettings.intensity.value > 0f);
// If any of the previous requirements is missing, the effect is not requested or no acceleration structure, set the default one and leave right away
if (invalidState)
{
SetDefaultAmbientOcclusionTexture(cmd);
return;
}
// Grab the acceleration structure for the target camera
RaytracingAccelerationStructure accelerationStructure = m_RaytracingManager.RequestAccelerationStructure(rtEnvironement.aoLayerMask);
// Define the shader pass to use for the reflection pass
cmd.SetRaytracingShaderPass(aoShader, "VisibilityDXR");
// Set the acceleration structure for the pass
cmd.SetRaytracingAccelerationStructure(aoShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
cmd.SetRaytracingTextureParam(aoShader, m_RayGenShaderName, HDShaderIDs._OwenScrambledTexture, m_PipelineResources.textures.owenScrambledTex);
cmd.SetRaytracingTextureParam(aoShader, m_RayGenShaderName, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
// Inject the ray generation data
cmd.SetRaytracingFloatParams(aoShader, HDShaderIDs._RaytracingRayBias, rtEnvironement.rayBias);
cmd.SetRaytracingFloatParams(aoShader, HDShaderIDs._RaytracingRayMaxLength, rtEnvironement.aoRayLength);
cmd.SetRaytracingIntParams(aoShader, HDShaderIDs._RaytracingNumSamples, rtEnvironement.aoNumSamples);
// Set the data for the ray generation
cmd.SetRaytracingTextureParam(aoShader, m_RayGenShaderName, HDShaderIDs._RaytracingHitDistanceTexture, m_HitDistanceBuffer);
cmd.SetRaytracingTextureParam(aoShader, m_RayGenShaderName, HDShaderIDs._RaytracingVSNormalTexture, m_ViewSpaceNormalBuffer);
cmd.SetRaytracingTextureParam(aoShader, m_RayGenShaderName, HDShaderIDs._AmbientOcclusionTextureRW, m_IntermediateBuffer);
cmd.SetRaytracingTextureParam(aoShader, m_RayGenShaderName, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRaytracingTextureParam(aoShader, m_RayGenShaderName, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)frameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Value used to scale the ao intensity
cmd.SetRaytracingFloatParam(aoShader, HDShaderIDs._RaytracingAOIntensity, aoSettings.intensity.value);
cmd.SetRaytracingIntParam(aoShader, HDShaderIDs._RayCountEnabled, m_RaytracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRaytracingTextureParam(aoShader, m_RayGenShaderName, HDShaderIDs._RayCountTexture, m_RaytracingManager.rayCountManager.rayCountTexture);
// Run the calculus
cmd.DispatchRays(aoShader, m_RayGenShaderName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
using (new ProfilingSample(cmd, "Filter Reflection", CustomSamplerId.RaytracingAmbientOcclusion.GetSampler()))
{
switch (rtEnvironement.aoFilterMode)
{
case HDRaytracingEnvironment.AOFilterMode.Nvidia:
{
cmd.DenoiseAmbientOcclusionTexture(m_IntermediateBuffer, m_HitDistanceBuffer, m_SharedRTManager.GetDepthStencilBuffer(), m_ViewSpaceNormalBuffer, outputTexture, hdCamera.viewMatrix, hdCamera.projMatrix, (uint)rtEnvironement.maxFilterWidthInPixels, rtEnvironement.filterRadiusInMeters, rtEnvironement.normalSharpness, 1.0f, 0.0f);
}
break;
case HDRaytracingEnvironment.AOFilterMode.SpatioTemporal:
{
m_KernelFilter = aoFilter.FindKernel("AOCopyTAAHistory");
// Grab the history buffer
RTHandleSystem.RTHandle ambientOcclusionHistory = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedAmbientOcclusion)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedAmbientOcclusion, AmbientOcclusionHistoryBufferAllocatorFunction, 1);
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesX = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesY = (texHeight + (areaTileSize - 1)) / areaTileSize;
// Given that we can't read and write into the same buffer, we store the current frame value and the history in the denoisebuffer1
cmd.SetComputeTextureParam(aoFilter, m_KernelFilter, HDShaderIDs._AOHistorybufferRW, ambientOcclusionHistory);
cmd.SetComputeTextureParam(aoFilter, m_KernelFilter, HDShaderIDs._DenoiseInputTexture, m_IntermediateBuffer);
cmd.SetComputeTextureParam(aoFilter, m_KernelFilter, HDShaderIDs._DenoiseOutputTextureRW, m_ViewSpaceNormalBuffer);
cmd.DispatchCompute(aoFilter, m_KernelFilter, numTilesX, numTilesY, 1);
m_KernelFilter = aoFilter.FindKernel("AOApplyTAA");
// Apply a vectorized temporal filtering pass and store it back in the denoisebuffer0 with the analytic value in the third channel
var historyScale = new Vector2(hdCamera.actualWidth / (float)ambientOcclusionHistory.rt.width, hdCamera.actualHeight / (float)ambientOcclusionHistory.rt.height);
cmd.SetComputeVectorParam(aoFilter, HDShaderIDs._ScreenToTargetScaleHistory, historyScale);
cmd.SetComputeTextureParam(aoFilter, m_KernelFilter, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(aoFilter, m_KernelFilter, HDShaderIDs._DenoiseInputTexture, m_ViewSpaceNormalBuffer);
cmd.SetComputeTextureParam(aoFilter, m_KernelFilter, HDShaderIDs._DenoiseOutputTextureRW, m_IntermediateBuffer);
cmd.SetComputeTextureParam(aoFilter, m_KernelFilter, HDShaderIDs._AOHistorybufferRW, ambientOcclusionHistory);
cmd.DispatchCompute(aoFilter, m_KernelFilter, numTilesX, numTilesY, 1);
m_KernelFilter = aoFilter.FindKernel("AOBilateralFilterH");
// Horizontal pass of the bilateral filter
cmd.SetComputeIntParam(aoFilter, HDShaderIDs._RaytracingDenoiseRadius, rtEnvironement.aoBilateralRadius);
cmd.SetComputeTextureParam(aoFilter, m_KernelFilter, HDShaderIDs._DenoiseInputTexture, m_IntermediateBuffer);
cmd.SetComputeTextureParam(aoFilter, m_KernelFilter, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(aoFilter, m_KernelFilter, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(aoFilter, m_KernelFilter, HDShaderIDs._DenoiseOutputTextureRW, m_ViewSpaceNormalBuffer);
cmd.DispatchCompute(aoFilter, m_KernelFilter, numTilesX, numTilesY, 1);
m_KernelFilter = aoFilter.FindKernel("AOBilateralFilterV");
// Horizontal pass of the bilateral filter
cmd.SetComputeIntParam(aoFilter, HDShaderIDs._RaytracingDenoiseRadius, rtEnvironement.aoBilateralRadius);
cmd.SetComputeTextureParam(aoFilter, m_KernelFilter, HDShaderIDs._DenoiseInputTexture, m_ViewSpaceNormalBuffer);
cmd.SetComputeTextureParam(aoFilter, m_KernelFilter, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(aoFilter, m_KernelFilter, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(aoFilter, m_KernelFilter, HDShaderIDs._DenoiseOutputTextureRW, outputTexture);
cmd.DispatchCompute(aoFilter, m_KernelFilter, numTilesX, numTilesY, 1);
}
break;
case HDRaytracingEnvironment.AOFilterMode.None:
{
HDUtils.BlitCameraTexture(cmd, hdCamera, m_IntermediateBuffer, outputTexture);
}
break;
}
}
// 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 bool RenderIndirectDiffuse(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, uint frameCount)
{
// Bind the indirect diffuse texture
BindIndirectDiffuseTexture(cmd);
// First thing to check is: Do we have a valid ray-tracing environment?
HDRaytracingEnvironment rtEnvironement = m_RaytracingManager.CurrentEnvironment();
RaytracingShader indirectDiffuseShader = m_PipelineAsset.renderPipelineResources.shaders.indirectDiffuseRaytracing;
bool invalidState = rtEnvironement == null || !rtEnvironement.raytracedIndirectDiffuse ||
indirectDiffuseShader == null ||
m_PipelineResources.textures.owenScrambledTex == null || m_PipelineResources.textures.scramblingTex == null;
// If no acceleration structure available, end it now
if (invalidState)
{
return(false);
}
// Grab the acceleration structures and the light cluster to use
RaytracingAccelerationStructure accelerationStructure = m_RaytracingManager.RequestAccelerationStructure(rtEnvironement.indirectDiffuseLayerMask);
HDRaytracingLightCluster lightCluster = m_RaytracingManager.RequestLightCluster(rtEnvironement.indirectDiffuseLayerMask);
// Compute the actual resolution that is needed base on the quality
string targetRayGen = m_RayGenIndirectDiffuseName;
// Define the shader pass to use for the indirect diffuse pass
cmd.SetRaytracingShaderPass(indirectDiffuseShader, "IndirectDXR");
// Set the acceleration structure for the pass
cmd.SetRaytracingAccelerationStructure(indirectDiffuseShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
cmd.SetRaytracingTextureParam(indirectDiffuseShader, targetRayGen, HDShaderIDs._OwenScrambledTexture, m_PipelineResources.textures.owenScrambledTex);
cmd.SetRaytracingTextureParam(indirectDiffuseShader, targetRayGen, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironement.rayBias);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayMaxLength, rtEnvironement.indirectDiffuseRayLength);
cmd.SetRaytracingIntParams(indirectDiffuseShader, HDShaderIDs._RaytracingNumSamples, rtEnvironement.indirectDiffuseNumSamples);
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)frameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Set the data for the ray generation
cmd.SetRaytracingTextureParam(indirectDiffuseShader, targetRayGen, HDShaderIDs._IndirectDiffuseTextureRW, m_IndirectDiffuseTexture);
cmd.SetRaytracingTextureParam(indirectDiffuseShader, targetRayGen, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRaytracingTextureParam(indirectDiffuseShader, targetRayGen, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
// Set the indirect diffuse parameters
cmd.SetRaytracingFloatParams(indirectDiffuseShader, HDShaderIDs._RaytracingIntensityClamp, rtEnvironement.indirectDiffuseClampValue);
// Set ray count tex
cmd.SetRaytracingIntParam(indirectDiffuseShader, HDShaderIDs._RayCountEnabled, m_RaytracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRaytracingTextureParam(indirectDiffuseShader, targetRayGen, HDShaderIDs._RayCountTexture, m_RaytracingManager.rayCountManager.rayCountTexture);
// Compute the pixel spread value
float pixelSpreadAngle = Mathf.Atan(2.0f * Mathf.Tan(hdCamera.camera.fieldOfView * Mathf.PI / 360.0f) / Mathf.Min(hdCamera.actualWidth, hdCamera.actualHeight));
cmd.SetRaytracingFloatParam(indirectDiffuseShader, HDShaderIDs._RaytracingPixelSpreadAngle, pixelSpreadAngle);
// LightLoop data
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, rtEnvironement.maxNumLightsPercell);
cmd.SetGlobalInt(HDShaderIDs._PunctualLightCountRT, lightCluster.GetPunctualLightCount());
cmd.SetGlobalInt(HDShaderIDs._AreaLightCountRT, lightCluster.GetAreaLightCount());
// Set the data for the ray miss
cmd.SetRaytracingTextureParam(indirectDiffuseShader, m_MissShaderName, HDShaderIDs._SkyTexture, m_SkyManager.skyReflection);
// Compute the actual resolution that is needed base on the quality
uint widthResolution = (uint)hdCamera.actualWidth;
uint heightResolution = (uint)hdCamera.actualHeight;
// Run the calculus
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTNG_ONLY", true);
cmd.DispatchRays(indirectDiffuseShader, targetRayGen, widthResolution, heightResolution, 1);
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTNG_ONLY", false);
return(true);
}
public bool RenderIndirectDiffuse(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, int frameCount)
{
// Bind the indirect diffuse texture
BindIndirectDiffuseTexture(cmd);
// First thing to check is: Do we have a valid ray-tracing environment?
HDRaytracingEnvironment rtEnvironment = m_RaytracingManager.CurrentEnvironment();
RayTracingShader indirectDiffuseShader = m_PipelineAsset.renderPipelineRayTracingResources.indirectDiffuseRaytracing;
ComputeShader indirectDiffuseAccumulation = m_PipelineAsset.renderPipelineRayTracingResources.indirectDiffuseAccumulation;
var settings = VolumeManager.instance.stack.GetComponent <GlobalIllumination>();
var lightClusterSettings = VolumeManager.instance.stack.GetComponent <LightCluster>();
bool invalidState = rtEnvironment == null || !settings.enableRayTracing.value ||
indirectDiffuseShader == null || indirectDiffuseAccumulation == null ||
m_PipelineResources.textures.owenScrambledTex == null || m_PipelineResources.textures.scramblingTex == null;
// If no acceleration structure available, end it now
if (invalidState)
{
return(false);
}
// Grab the acceleration structures and the light cluster to use
RayTracingAccelerationStructure accelerationStructure = m_RaytracingManager.RequestAccelerationStructure(rtEnvironment.indirectDiffuseLayerMask);
HDRaytracingLightCluster lightCluster = m_RaytracingManager.RequestLightCluster(rtEnvironment.indirectDiffuseLayerMask);
// Compute the actual resolution that is needed base on the quality
string targetRayGen = m_RayGenIndirectDiffuseName;
// Define the shader pass to use for the indirect diffuse pass
cmd.SetRayTracingShaderPass(indirectDiffuseShader, "IndirectDXR");
// Set the acceleration structure for the pass
cmd.SetRayTracingAccelerationStructure(indirectDiffuseShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._OwenScrambledTexture, m_PipelineResources.textures.owenScrambledTex);
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironment.rayBias);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayMaxLength, settings.rayLength.value);
cmd.SetRayTracingIntParams(indirectDiffuseShader, HDShaderIDs._RaytracingNumSamples, settings.numSamples.value);
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)frameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Set the data for the ray generation
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._IndirectDiffuseTextureRW, m_IndirectDiffuseTexture);
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
// Set the indirect diffuse parameters
cmd.SetRayTracingFloatParams(indirectDiffuseShader, HDShaderIDs._RaytracingIntensityClamp, settings.clampValue.value);
// Set ray count texture
cmd.SetRayTracingIntParam(indirectDiffuseShader, HDShaderIDs._RayCountEnabled, m_RaytracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._RayCountTexture, m_RaytracingManager.rayCountManager.rayCountTexture);
// Compute the pixel spread value
float pixelSpreadAngle = Mathf.Atan(2.0f * Mathf.Tan(hdCamera.camera.fieldOfView * Mathf.PI / 360.0f) / Mathf.Min(hdCamera.actualWidth, hdCamera.actualHeight));
cmd.SetRayTracingFloatParam(indirectDiffuseShader, HDShaderIDs._RaytracingPixelSpreadAngle, pixelSpreadAngle);
// LightLoop data
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(indirectDiffuseShader, HDShaderIDs._SkyTexture, m_SkyManager.skyReflection);
// Compute the actual resolution that is needed base on the quality
int widthResolution = hdCamera.actualWidth;
int heightResolution = hdCamera.actualHeight;
// Run the computation
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTING_ONLY", true);
cmd.DispatchRays(indirectDiffuseShader, targetRayGen, (uint)widthResolution, (uint)heightResolution, 1);
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTING_ONLY", false);
if (settings.enableFilter.value)
{
// Grab the history buffer
RTHandleSystem.RTHandle indirectDiffuseHistory = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedIndirectDiffuse)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedIndirectDiffuse, IndirectDiffuseHistoryBufferAllocatorFunction, 1);
HDSimpleDenoiser simpleDenoiser = m_RaytracingManager.GetSimpleDenoiser();
simpleDenoiser.DenoiseBuffer(cmd, hdCamera, m_IndirectDiffuseTexture, indirectDiffuseHistory, m_DenoiseBuffer0, settings.filterRadius.value, singleChannel: false);
HDUtils.BlitCameraTexture(cmd, m_DenoiseBuffer0, m_IndirectDiffuseTexture);
}
// If we are in deferred mode, we need to make sure to add the indirect diffuse (that we intentionally ignored during the GBuffer pass)
// Note that this discards the texture/object ambient occlusion. But we consider that okay given that the ray traced indirect diffuse
// is a physically correct evaluation of that quantity
if (hdCamera.frameSettings.litShaderMode == LitShaderMode.Deferred)
{
int indirectDiffuseKernel = indirectDiffuseAccumulation.FindKernel("IndirectDiffuseAccumulation");
// Bind the source texture
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, indirectDiffuseKernel, HDShaderIDs._IndirectDiffuseTexture, m_IndirectDiffuseTexture);
// Bind the output texture
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, indirectDiffuseKernel, HDShaderIDs._GBufferTexture[0], m_GBufferManager.GetBuffer(0));
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, indirectDiffuseKernel, HDShaderIDs._GBufferTexture[3], m_GBufferManager.GetBuffer(3));
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesX = (widthResolution + (areaTileSize - 1)) / areaTileSize;
int numTilesY = (heightResolution + (areaTileSize - 1)) / areaTileSize;
// Add the indirect diffuse to the GBuffer
cmd.DispatchCompute(indirectDiffuseAccumulation, indirectDiffuseKernel, numTilesX, numTilesY, 1);
}
(RenderPipelineManager.currentPipeline as HDRenderPipeline).PushFullScreenDebugTexture(hdCamera, cmd, m_IndirectDiffuseTexture, FullScreenDebugMode.IndirectDiffuse);
return(true);
}
public void RenderReflections(HDCamera hdCamera, CommandBuffer cmd, RTHandleSystem.RTHandle outputTexture, ScriptableRenderContext renderContext, uint frameCount)
{
// First thing to check is: Do we have a valid ray-tracing environment?
HDRaytracingEnvironment rtEnvironement = m_RaytracingManager.CurrentEnvironment();
BlueNoise blueNoise = m_RaytracingManager.GetBlueNoiseManager();
ComputeShader bilateralFilter = m_PipelineAsset.renderPipelineResources.shaders.reflectionBilateralFilterCS;
RaytracingShader reflectionShader = m_PipelineAsset.renderPipelineResources.shaders.reflectionRaytracing;
bool missingResources = rtEnvironement == null || blueNoise == null || bilateralFilter == null || reflectionShader == null ||
m_PipelineResources.textures.owenScrambledTex == null || m_PipelineResources.textures.scramblingTex == null;
// Try to grab the acceleration structure and the list of HD lights for the target camera
RaytracingAccelerationStructure accelerationStructure = m_RaytracingManager.RequestAccelerationStructure(hdCamera);
HDRaytracingLightCluster lightCluster = m_RaytracingManager.RequestLightCluster(hdCamera);
// If no acceleration structure available, end it now
if (accelerationStructure == null || lightCluster == null || missingResources)
{
return;
}
// Compute the actual resolution that is needed base on the quality
string targetRayGen = "";
switch (rtEnvironement.reflQualityMode)
{
case HDRaytracingEnvironment.ReflectionsQuality.QuarterRes:
{
targetRayGen = m_RayGenHalfResName;
};
break;
case HDRaytracingEnvironment.ReflectionsQuality.Integration:
{
targetRayGen = m_RayGenIntegrationName;
};
break;
}
// Define the shader pass to use for the reflection pass
cmd.SetRaytracingShaderPass(reflectionShader, "ReflectionDXR");
// Set the acceleration structure for the pass
cmd.SetRaytracingAccelerationStructure(reflectionShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._OwenScrambledTexture, m_PipelineResources.textures.owenScrambledTex);
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
// Global reflection parameters
cmd.SetRaytracingFloatParams(reflectionShader, HDShaderIDs._RaytracingIntensityClamp, rtEnvironement.reflClampValue);
cmd.SetRaytracingFloatParams(reflectionShader, HDShaderIDs._RaytracingReflectionMinSmoothness, rtEnvironement.reflMinSmoothness);
cmd.SetRaytracingFloatParams(reflectionShader, HDShaderIDs._RaytracingReflectionMaxDistance, rtEnvironement.reflBlendDistance);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironement.rayBias);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayMaxLength, rtEnvironement.reflRayLength);
cmd.SetRaytracingIntParams(reflectionShader, HDShaderIDs._RaytracingNumSamples, rtEnvironement.reflNumMaxSamples);
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)frameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Set the data for the ray generation
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._SsrLightingTextureRW, m_LightingTexture);
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._SsrHitPointTexture, m_HitPdfTexture);
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
// Set ray count tex
cmd.SetRaytracingIntParam(reflectionShader, HDShaderIDs._RayCountEnabled, m_RaytracingManager.rayCountManager.rayCountEnabled);
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._RayCountTexture, m_RaytracingManager.rayCountManager.rayCountTex);
// Compute the pixel spread value
float pixelSpreadAngle = Mathf.Atan(2.0f * Mathf.Tan(hdCamera.camera.fieldOfView * Mathf.PI / 360.0f) / Mathf.Min(hdCamera.actualWidth, hdCamera.actualHeight));
cmd.SetRaytracingFloatParam(reflectionShader, HDShaderIDs._RaytracingPixelSpreadAngle, pixelSpreadAngle);
// 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, rtEnvironement.maxNumLightsPercell);
cmd.SetGlobalInt(HDShaderIDs._PunctualLightCountRT, lightCluster.GetPunctualLightCount());
cmd.SetGlobalInt(HDShaderIDs._AreaLightCountRT, lightCluster.GetAreaLightCount());
// Set the data for the ray miss
cmd.SetRaytracingTextureParam(reflectionShader, m_MissShaderName, HDShaderIDs._SkyTexture, m_SkyManager.skyReflection);
// Compute the actual resolution that is needed base on the quality
uint widthResolution = 1, heightResolution = 1;
switch (rtEnvironement.reflQualityMode)
{
case HDRaytracingEnvironment.ReflectionsQuality.QuarterRes:
{
widthResolution = (uint)hdCamera.actualWidth / 2;
heightResolution = (uint)hdCamera.actualHeight / 2;
};
break;
case HDRaytracingEnvironment.ReflectionsQuality.Integration:
{
widthResolution = (uint)hdCamera.actualWidth;
heightResolution = (uint)hdCamera.actualHeight;
};
break;
}
// Run the calculus
cmd.DispatchRays(reflectionShader, targetRayGen, widthResolution, heightResolution, 1);
using (new ProfilingSample(cmd, "Filter Reflection", CustomSamplerId.RaytracingFilterReflection.GetSampler()))
{
switch (rtEnvironement.reflQualityMode)
{
case HDRaytracingEnvironment.ReflectionsQuality.QuarterRes:
{
// Fetch the right filter to use
int currentKernel = bilateralFilter.FindKernel("RaytracingReflectionFilter");
// Inject all the parameters for the compute
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, HDShaderIDs._SsrLightingTextureRW, m_LightingTexture);
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, HDShaderIDs._SsrHitPointTexture, m_HitPdfTexture);
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, "_NoiseTexture", blueNoise.textureArray16RGB);
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, "_VarianceTexture", m_VarianceBuffer);
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, "_MinColorRangeTexture", m_MinBoundBuffer);
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, "_MaxColorRangeTexture", m_MaxBoundBuffer);
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, "_RaytracingReflectionTexture", outputTexture);
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
cmd.SetComputeIntParam(bilateralFilter, HDShaderIDs._SpatialFilterRadius, rtEnvironement.reflSpatialFilterRadius);
// Texture dimensions
int texWidth = outputTexture.rt.width;
int texHeight = outputTexture.rt.width;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesXHR = (texWidth / 2 + (areaTileSize - 1)) / areaTileSize;
int numTilesYHR = (texHeight / 2 + (areaTileSize - 1)) / areaTileSize;
// Compute the texture
cmd.DispatchCompute(bilateralFilter, currentKernel, numTilesXHR, numTilesYHR, 1);
int numTilesXFR = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesYFR = (texHeight + (areaTileSize - 1)) / areaTileSize;
RTHandleSystem.RTHandle history = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedReflection)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedReflection, ReflectionHistoryBufferAllocatorFunction, 1);
// Fetch the right filter to use
currentKernel = bilateralFilter.FindKernel("TemporalAccumulationFilter");
cmd.SetComputeFloatParam(bilateralFilter, HDShaderIDs._TemporalAccumuationWeight, rtEnvironement.reflTemporalAccumulationWeight);
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, HDShaderIDs._AccumulatedFrameTexture, history);
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, HDShaderIDs._CurrentFrameTexture, outputTexture);
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, "_MinColorRangeTexture", m_MinBoundBuffer);
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, "_MaxColorRangeTexture", m_MaxBoundBuffer);
cmd.DispatchCompute(bilateralFilter, currentKernel, numTilesXFR, numTilesYFR, 1);
}
break;
case HDRaytracingEnvironment.ReflectionsQuality.Integration:
{
HDUtils.BlitCameraTexture(cmd, hdCamera, m_LightingTexture, outputTexture);
}
break;
}
}
}
public void RenderAO(HDCamera hdCamera, CommandBuffer cmd, RTHandleSystem.RTHandle outputTexture, ScriptableRenderContext renderContext, int frameCount)
{
// Let's check all the resources
HDRaytracingEnvironment rtEnvironment = m_RaytracingManager.CurrentEnvironment();
RayTracingShader aoShader = m_PipelineRayTracingResources.aoRaytracing;
var aoSettings = VolumeManager.instance.stack.GetComponent <AmbientOcclusion>();
// Check if the state is valid for evaluating ambient occlusion
bool invalidState = rtEnvironment == null ||
aoShader == null ||
m_PipelineResources.textures.owenScrambledTex == null || m_PipelineResources.textures.scramblingTex == null;
// If any of the previous requirements is missing, the effect is not requested or no acceleration structure, set the default one and leave right away
if (invalidState)
{
SetDefaultAmbientOcclusionTexture(cmd);
return;
}
// Grab the acceleration structure for the target camera
RayTracingAccelerationStructure accelerationStructure = m_RaytracingManager.RequestAccelerationStructure(rtEnvironment.aoLayerMask);
// Define the shader pass to use for the reflection pass
cmd.SetRayTracingShaderPass(aoShader, "VisibilityDXR");
// Set the acceleration structure for the pass
cmd.SetRayTracingAccelerationStructure(aoShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
cmd.SetRayTracingTextureParam(aoShader, HDShaderIDs._OwenScrambledTexture, m_PipelineResources.textures.owenScrambledTex);
cmd.SetRayTracingTextureParam(aoShader, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
// Inject the ray generation data
cmd.SetRayTracingFloatParams(aoShader, HDShaderIDs._RaytracingRayBias, rtEnvironment.rayBias);
cmd.SetRayTracingFloatParams(aoShader, HDShaderIDs._RaytracingRayMaxLength, aoSettings.rayLength.value);
cmd.SetRayTracingIntParams(aoShader, HDShaderIDs._RaytracingNumSamples, aoSettings.numSamples.value);
// Set the data for the ray generation
cmd.SetRayTracingTextureParam(aoShader, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(aoShader, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)frameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Value used to scale the ao intensity
cmd.SetRayTracingFloatParam(aoShader, HDShaderIDs._RaytracingAOIntensity, aoSettings.intensity.value);
cmd.SetRayTracingIntParam(aoShader, HDShaderIDs._RayCountEnabled, m_RaytracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRayTracingTextureParam(aoShader, HDShaderIDs._RayCountTexture, m_RaytracingManager.rayCountManager.rayCountTexture);
// Set the output textures
cmd.SetRayTracingTextureParam(aoShader, HDShaderIDs._AmbientOcclusionTextureRW, m_IntermediateBuffer);
cmd.SetRayTracingTextureParam(aoShader, HDShaderIDs._RaytracingVSNormalTexture, m_ViewSpaceNormalBuffer);
// Run the computation
cmd.DispatchRays(aoShader, m_RayGenShaderName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
using (new ProfilingSample(cmd, "Filter Reflection", CustomSamplerId.RaytracingAmbientOcclusion.GetSampler()))
{
if (aoSettings.enableFilter.value)
{
// Grab the history buffer
RTHandleSystem.RTHandle ambientOcclusionHistory = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedAmbientOcclusion)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedAmbientOcclusion, AmbientOcclusionHistoryBufferAllocatorFunction, 1);
// Apply the simple denoiser
HDSimpleDenoiser simpleDenoiser = m_RaytracingManager.GetSimpleDenoiser();
simpleDenoiser.DenoiseBuffer(cmd, hdCamera, m_IntermediateBuffer, ambientOcclusionHistory, outputTexture, aoSettings.filterRadius.value);
}
else
{
HDUtils.BlitCameraTexture(cmd, m_IntermediateBuffer, 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 RenderDirectionalLightScreenSpaceShadow(CommandBuffer cmd, HDCamera hdCamera, int frameCount)
{
// Render directional screen space shadow if required
if (m_CurrentSunLightAdditionalLightData != null && m_CurrentSunLightAdditionalLightData.WillRenderScreenSpaceShadow())
{
#if ENABLE_RAYTRACING
// If the shadow is flagged as ray traced, we need to evaluate it completely
if (m_CurrentSunLightAdditionalLightData.WillRenderRayTracedShadow())
{
HDRaytracingEnvironment rtEnvironment = m_RayTracingManager.CurrentEnvironment();
ComputeShader shadowsCompute = m_Asset.renderPipelineRayTracingResources.shadowRaytracingCS;
RayTracingShader shadowRayTrace = m_Asset.renderPipelineRayTracingResources.shadowRaytracingRT;
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesX = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesY = (texHeight + (areaTileSize - 1)) / areaTileSize;
int shadowComputeKernel = shadowsCompute.FindKernel("ClearShadowTexture");
cmd.SetComputeBufferParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._LightDatas, m_LightLoopLightData.lightData);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedDirectionalShadowIntegration, m_DenoiseBuffer0);
cmd.DispatchCompute(shadowsCompute, shadowComputeKernel, numTilesX, numTilesY, 1);
cmd.SetGlobalTexture(HDShaderIDs._OwenScrambledTexture, m_Asset.renderPipelineResources.textures.owenScrambledTex);
cmd.SetGlobalTexture(HDShaderIDs._ScramblingTexture, m_Asset.renderPipelineResources.textures.scramblingTex);
for (int i = 0; i < m_CurrentSunLightAdditionalLightData.numRayTracingSamples; ++i)
{
shadowComputeKernel = shadowsCompute.FindKernel("RaytracingDirectionalShadowSample");
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)frameCount % 8;
// This pass evaluates the analytic value and the generates and outputs the first sample
cmd.SetComputeBufferParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._LightDatas, m_LightLoopLightData.lightData);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingFrameIndex, frameIndex);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingNumSamples, m_CurrentSunLightAdditionalLightData.numRayTracingSamples);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingSampleIndex, i);
cmd.SetComputeMatrixParam(shadowsCompute, HDShaderIDs._RaytracingAreaWorldToLocal, worldToLocalArea);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedDirectionalShadowIntegration, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetComputeFloatParam(shadowsCompute, HDShaderIDs._DirectionalLightAngle, m_CurrentSunLightAdditionalLightData.sunLightConeAngle);
cmd.DispatchCompute(shadowsCompute, shadowComputeKernel, numTilesX, numTilesY, 1);
// Grab the acceleration structure for the target camera
RayTracingAccelerationStructure accelerationStructure = m_RayTracingManager.RequestAccelerationStructure(rtEnvironment.shadowLayerMask);
// Define the shader pass to use for the reflection pass
cmd.SetRayTracingShaderPass(shadowRayTrace, "VisibilityDXR");
// Set the acceleration structure for the pass
cmd.SetRayTracingAccelerationStructure(shadowRayTrace, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// This pass will use the previously generated sample and add it to the integration buffer
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RaytracedDirectionalShadowIntegration, m_DenoiseBuffer0);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetRayTracingFloatParam(shadowRayTrace, HDShaderIDs._DirectionalLightAngle, m_CurrentSunLightAdditionalLightData.sunLightConeAngle);
cmd.SetRayTracingIntParam(shadowRayTrace, HDShaderIDs._RaytracingNumSamples, 1);
cmd.DispatchRays(shadowRayTrace, m_RayGenDirectionalShadowSingleName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
}
RTHandleSystem.RTHandle shadowHistoryArray = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedShadow)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedShadow, ShadowHistoryBufferAllocatorFunction, 1);
// Apply the simple denoiser (if required)
if (m_CurrentSunLightAdditionalLightData.filterTracedShadow)
{
HDSimpleDenoiser simpleDenoiser = m_RayTracingManager.GetSimpleDenoiser();
simpleDenoiser.DenoiseBuffer(cmd, hdCamera, m_DenoiseBuffer0, shadowHistoryArray, m_DenoiseBuffer1, m_CurrentSunLightAdditionalLightData.filterSizeTraced, singleChannel: true, slotIndex: m_CurrentSunLightDirectionalLightData.screenSpaceShadowIndex);
}
else
{
HDUtils.BlitCameraTexture(cmd, m_DenoiseBuffer0, m_DenoiseBuffer1);
}
shadowComputeKernel = shadowsCompute.FindKernel("OutputShadowTexture");
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedDirectionalShadowIntegration, m_DenoiseBuffer1);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._ScreenSpaceShadowsTextureRW, m_ScreenSpaceShadowTextureArray);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingShadowSlot, m_CurrentSunLightDirectionalLightData.screenSpaceShadowIndex);
cmd.DispatchCompute(shadowsCompute, shadowComputeKernel, numTilesX, numTilesY, 1);
}
else
#endif
{
// If it is screen space but not ray traced, then we can rely on the shadow map
HDUtils.SetRenderTarget(cmd, m_ScreenSpaceShadowTextureArray, depthSlice: m_CurrentSunLightDirectionalLightData.screenSpaceShadowIndex);
HDUtils.DrawFullScreen(cmd, s_ScreenSpaceShadowsMat, m_ScreenSpaceShadowTextureArray);
}
}
}
// This function defines which acceleration structures are going to be used during the following frame
// and updates their RAS
public void UpdateFrameData()
{
// Set all the acceleration structures that are currently allocated to not updated
foreach (var subScene in m_SubScenes)
{
subScene.Value.needUpdate = false;
}
// Grab the current environment
HDRaytracingEnvironment rtEnv = CurrentEnvironment();
if (rtEnv == null)
{
return;
}
// If AO is on flag its RAS needUpdate
if (rtEnv.raytracedAO)
{
HDRayTracingSubScene currentSubScene = RequestSubScene(rtEnv.aoLayerMask);
currentSubScene.needUpdate = true;
}
// If Reflection is on flag its RAS needUpdate
if (rtEnv.raytracedReflections)
{
HDRayTracingSubScene currentSubScene = RequestSubScene(rtEnv.reflLayerMask);
currentSubScene.needUpdate = true;
}
// If Area Shadow is on flag its RAS needUpdate
if (rtEnv.raytracedShadows)
{
HDRayTracingSubScene currentSubScene = RequestSubScene(rtEnv.shadowLayerMask);
currentSubScene.needUpdate = true;
}
// If Primary Visibility is on flag its RAS needUpdate
if (rtEnv.raytracedObjects)
{
HDRayTracingSubScene currentSubScene = RequestSubScene(rtEnv.raytracedLayerMask);
currentSubScene.needUpdate = true;
}
// Let's go through all the sub-scenes that are flagged needUpdate and update their RAS
foreach (var subScene in m_SubScenes)
{
HDRayTracingSubScene currentSubScene = subScene.Value;
if (currentSubScene.accelerationStructure != null && currentSubScene.needUpdate)
{
for (var i = 0; i < currentSubScene.targetRenderers.Count; i++)
{
if (currentSubScene.targetRenderers[i] != null)
{
currentSubScene.accelerationStructure.UpdateInstanceTransform(currentSubScene.targetRenderers[i]);
}
}
currentSubScene.accelerationStructure.Update();
// It doesn't need RAS update anymore
currentSubScene.needUpdate = false;
}
}
}
public bool RenderAreaShadows(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, uint frameCount)
{
// NOTE: Here we cannot clear the area shadow texture because it is a texture array. So we need to bind it and make sure no material will try to read it in the shaders
BindShadowTexture(cmd);
// Let's check all the resources and states to see if we should render the effect
HDRaytracingEnvironment rtEnvironement = m_RaytracingManager.CurrentEnvironment();
RaytracingShader shadowsShader = m_PipelineAsset.renderPipelineResources.shaders.shadowsRaytracing;
ComputeShader bilateralFilter = m_PipelineAsset.renderPipelineResources.shaders.areaBillateralFilterCS;
bool invalidState = rtEnvironement == null || !rtEnvironement.raytracedShadows || hdCamera.frameSettings.litShaderMode != LitShaderMode.Deferred ||
shadowsShader == null || bilateralFilter == null ||
m_PipelineResources.textures.owenScrambledTex == null || m_PipelineResources.textures.scramblingTex == null;
// If invalid state or ray-tracing acceleration structure, we stop right away
if (invalidState)
{
return(false);
}
// Grab the acceleration structure for the target camera
RaytracingAccelerationStructure accelerationStructure = m_RaytracingManager.RequestAccelerationStructure(rtEnvironement.shadowLayerMask);
// Define the shader pass to use for the reflection pass
cmd.SetRaytracingShaderPass(shadowsShader, "VisibilityDXR");
// Set the acceleration structure for the pass
cmd.SetRaytracingAccelerationStructure(shadowsShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, HDShaderIDs._OwenScrambledTexture, m_PipelineResources.textures.owenScrambledTex);
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)frameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironement.rayBias);
int numLights = m_LightLoop.m_lightList.lights.Count;
for (int lightIdx = 0; lightIdx < numLights; ++lightIdx)
{
// If this is not a rectangular area light or it won't have shadows, skip it
if (m_LightLoop.m_lightList.lights[lightIdx].lightType != GPULightType.Rectangle || m_LightLoop.m_lightList.lights[lightIdx].rayTracedAreaShadowIndex == -1)
{
continue;
}
using (new ProfilingSample(cmd, "Raytrace Area Shadow", CustomSamplerId.RaytracingShadowIntegration.GetSampler()))
{
LightData currentLight = m_LightLoop.m_lightList.lights[lightIdx];
// We need to build the world to area light matrix
worldToLocalArea.SetColumn(0, currentLight.right);
worldToLocalArea.SetColumn(1, currentLight.up);
worldToLocalArea.SetColumn(2, currentLight.forward);
// Compensate the relative rendering if active
Vector3 lightPositionWS = currentLight.positionRWS;
if (ShaderConfig.s_CameraRelativeRendering != 0)
{
lightPositionWS += hdCamera.camera.transform.position;
}
worldToLocalArea.SetColumn(3, lightPositionWS);
worldToLocalArea.m33 = 1.0f;
worldToLocalArea = worldToLocalArea.inverse;
// Inject the light data
cmd.SetRaytracingBufferParam(shadowsShader, m_RayGenShaderName, HDShaderIDs._LightDatas, m_LightLoop.lightDatas);
cmd.SetRaytracingIntParam(shadowsShader, HDShaderIDs._RaytracingTargetAreaLight, lightIdx);
cmd.SetRaytracingIntParam(shadowsShader, HDShaderIDs._RaytracingNumSamples, rtEnvironement.shadowNumSamples);
cmd.SetRaytracingMatrixParam(shadowsShader, HDShaderIDs._RaytracingAreaWorldToLocal, worldToLocalArea);
// Set the data for the ray generation
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, HDShaderIDs._GBufferTexture[0], m_GbufferManager.GetBuffer(0));
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, HDShaderIDs._GBufferTexture[1], m_GbufferManager.GetBuffer(1));
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, HDShaderIDs._GBufferTexture[2], m_GbufferManager.GetBuffer(2));
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, HDShaderIDs._GBufferTexture[3], m_GbufferManager.GetBuffer(3));
cmd.SetRaytracingIntParam(shadowsShader, HDShaderIDs._RayCountEnabled, m_RaytracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, HDShaderIDs._RayCountTexture, m_RaytracingManager.rayCountManager.rayCountTexture);
// Set the output textures
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, _SNBuffer, m_SNBuffer);
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, _UNBuffer, m_UNBuffer);
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, _UBuffer, m_UBuffer);
// Bind the area cookie textures to the raytracing shader
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, HDShaderIDs._AreaCookieTextures, m_LightLoop.areaLightCookieManager.GetTexCache());
// Run the shadow evaluation
cmd.DispatchRays(shadowsShader, m_RayGenShaderName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
}
using (new ProfilingSample(cmd, "Combine Area Shadow", CustomSamplerId.RaytracingShadowCombination.GetSampler()))
{
// Fetch the filter kernel
m_KernelFilter = bilateralFilter.FindKernel("AreaBilateralShadow");
// Inject all the parameters for the compute
cmd.SetComputeTextureParam(bilateralFilter, m_KernelFilter, _SNBuffer, m_SNBuffer);
cmd.SetComputeTextureParam(bilateralFilter, m_KernelFilter, _UNBuffer, m_UNBuffer);
cmd.SetComputeTextureParam(bilateralFilter, m_KernelFilter, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(bilateralFilter, m_KernelFilter, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeIntParam(bilateralFilter, _DenoiseRadius, rtEnvironement.shadowFilterRadius);
cmd.SetComputeFloatParam(bilateralFilter, _GaussianSigma, rtEnvironement.shadowFilterSigma);
cmd.SetComputeIntParam(bilateralFilter, HDShaderIDs._RaytracingShadowSlot, m_LightLoop.m_lightList.lights[lightIdx].rayTracedAreaShadowIndex);
// Set the output slot
cmd.SetComputeTextureParam(bilateralFilter, m_KernelFilter, HDShaderIDs._AreaShadowTextureRW, m_AreaShadowTextureArray);
// Texture dimensions
int texWidth = m_AreaShadowTextureArray.rt.width;
int texHeight = m_AreaShadowTextureArray.rt.width;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesX = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesY = (texHeight + (areaTileSize - 1)) / areaTileSize;
// Compute the texture
cmd.DispatchCompute(bilateralFilter, m_KernelFilter, numTilesX, numTilesY, 1);
}
}
return(true);
}
public void RenderReflections(HDCamera hdCamera, CommandBuffer cmd, RTHandleSystem.RTHandle outputTexture, ScriptableRenderContext renderContext, uint frameCount)
{
// First thing to check is: Do we have a valid ray-tracing environment?
HDRaytracingEnvironment rtEnvironement = m_RaytracingManager.CurrentEnvironment();
LightLoop lightLoop = m_RaytracingManager.GetLightLoop();
BlueNoise blueNoise = m_RaytracingManager.GetBlueNoiseManager();
ComputeShader reflectionFilter = m_PipelineAsset.renderPipelineResources.shaders.reflectionBilateralFilterCS;
RaytracingShader reflectionShader = m_PipelineAsset.renderPipelineResources.shaders.reflectionRaytracing;
bool invalidState = rtEnvironement == null || blueNoise == null ||
reflectionFilter == null || reflectionShader == null ||
m_PipelineResources.textures.owenScrambledTex == null || m_PipelineResources.textures.scramblingTex == null;
// If no acceleration structure available, end it now
if (invalidState)
{
return;
}
// Grab the acceleration structures and the light cluster to use
RaytracingAccelerationStructure accelerationStructure = m_RaytracingManager.RequestAccelerationStructure(rtEnvironement.reflLayerMask);
HDRaytracingLightCluster lightCluster = m_RaytracingManager.RequestLightCluster(rtEnvironement.reflLayerMask);
// Compute the actual resolution that is needed base on the quality
string targetRayGen = "";
switch (rtEnvironement.reflQualityMode)
{
case HDRaytracingEnvironment.ReflectionsQuality.QuarterRes:
{
targetRayGen = m_RayGenHalfResName;
};
break;
case HDRaytracingEnvironment.ReflectionsQuality.Integration:
{
targetRayGen = m_RayGenIntegrationName;
};
break;
}
// 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);
// Inject the ray-tracing sampling data
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._OwenScrambledTexture, m_PipelineResources.textures.owenScrambledTex);
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
// Global reflection parameters
cmd.SetRaytracingFloatParams(reflectionShader, HDShaderIDs._RaytracingIntensityClamp, rtEnvironement.reflClampValue);
cmd.SetRaytracingFloatParams(reflectionShader, HDShaderIDs._RaytracingReflectionMinSmoothness, rtEnvironement.reflMinSmoothness);
cmd.SetRaytracingFloatParams(reflectionShader, HDShaderIDs._RaytracingReflectionMaxDistance, rtEnvironement.reflBlendDistance);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironement.rayBias);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayMaxLength, rtEnvironement.reflRayLength);
cmd.SetRaytracingIntParams(reflectionShader, HDShaderIDs._RaytracingNumSamples, rtEnvironement.reflNumMaxSamples);
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)frameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Set the data for the ray generation
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._SsrLightingTextureRW, m_LightingTexture);
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._SsrHitPointTexture, m_HitPdfTexture);
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
// Set ray count tex
cmd.SetRaytracingIntParam(reflectionShader, HDShaderIDs._RayCountEnabled, m_RaytracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._RayCountTexture, m_RaytracingManager.rayCountManager.rayCountTexture);
// Compute the pixel spread value
float pixelSpreadAngle = Mathf.Atan(2.0f * Mathf.Tan(hdCamera.camera.fieldOfView * Mathf.PI / 360.0f) / Mathf.Min(hdCamera.actualWidth, hdCamera.actualHeight));
cmd.SetRaytracingFloatParam(reflectionShader, HDShaderIDs._RaytracingPixelSpreadAngle, pixelSpreadAngle);
// 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, rtEnvironement.maxNumLightsPercell);
cmd.SetGlobalInt(HDShaderIDs._PunctualLightCountRT, lightCluster.GetPunctualLightCount());
cmd.SetGlobalInt(HDShaderIDs._AreaLightCountRT, lightCluster.GetAreaLightCount());
// Note: Just in case, we rebind the directional light data (in case they were not)
cmd.SetGlobalBuffer(HDShaderIDs._DirectionalLightDatas, lightLoop.directionalLightDatas);
cmd.SetGlobalInt(HDShaderIDs._DirectionalLightCount, lightLoop.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] : Texture2D.blackTexture;
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._SsrClearCoatMaskTexture, clearCoatMaskTexture);
// Set the data for the ray miss
cmd.SetRaytracingTextureParam(reflectionShader, m_MissShaderName, HDShaderIDs._SkyTexture, m_SkyManager.skyReflection);
// Compute the actual resolution that is needed base on the quality
uint widthResolution = 1, heightResolution = 1;
switch (rtEnvironement.reflQualityMode)
{
case HDRaytracingEnvironment.ReflectionsQuality.QuarterRes:
{
widthResolution = (uint)hdCamera.actualWidth / 2;
heightResolution = (uint)hdCamera.actualHeight / 2;
};
break;
case HDRaytracingEnvironment.ReflectionsQuality.Integration:
{
widthResolution = (uint)hdCamera.actualWidth;
heightResolution = (uint)hdCamera.actualHeight;
};
break;
}
// Force to disable specular lighting
cmd.SetGlobalInt(HDShaderIDs._EnableSpecularLighting, 0);
// Run the calculus
cmd.DispatchRays(reflectionShader, targetRayGen, widthResolution, heightResolution, 1);
// Restore the previous state of specular lighting
cmd.SetGlobalInt(HDShaderIDs._EnableSpecularLighting, hdCamera.frameSettings.IsEnabled(FrameSettingsField.SpecularLighting) ? 1 : 0);
using (new ProfilingSample(cmd, "Filter Reflection", CustomSamplerId.RaytracingFilterReflection.GetSampler()))
{
switch (rtEnvironement.reflQualityMode)
{
case HDRaytracingEnvironment.ReflectionsQuality.QuarterRes:
{
// Fetch the right filter to use
int currentKernel = reflectionFilter.FindKernel("RaytracingReflectionFilter");
// Inject all the parameters for the compute
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._SsrLightingTextureRW, m_LightingTexture);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._SsrHitPointTexture, m_HitPdfTexture);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, "_NoiseTexture", blueNoise.textureArray16RGB);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, "_VarianceTexture", m_VarianceBuffer);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, "_MinColorRangeTexture", m_MinBoundBuffer);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, "_MaxColorRangeTexture", m_MaxBoundBuffer);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, "_RaytracingReflectionTexture", outputTexture);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
cmd.SetComputeIntParam(reflectionFilter, HDShaderIDs._SpatialFilterRadius, rtEnvironement.reflSpatialFilterRadius);
cmd.SetComputeFloatParam(reflectionFilter, HDShaderIDs._RaytracingReflectionMinSmoothness, rtEnvironement.reflMinSmoothness);
// Texture dimensions
int texWidth = outputTexture.rt.width;
int texHeight = outputTexture.rt.height;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesXHR = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesYHR = (texHeight + (areaTileSize - 1)) / areaTileSize;
// Bind the right texture for clear coat support
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._SsrClearCoatMaskTexture, clearCoatMaskTexture);
// Compute the texture
cmd.DispatchCompute(reflectionFilter, currentKernel, numTilesXHR, numTilesYHR, 1);
int numTilesXFR = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesYFR = (texHeight + (areaTileSize - 1)) / areaTileSize;
RTHandleSystem.RTHandle history = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedReflection)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedReflection, ReflectionHistoryBufferAllocatorFunction, 1);
// Fetch the right filter to use
currentKernel = reflectionFilter.FindKernel("TemporalAccumulationFilter");
cmd.SetComputeFloatParam(reflectionFilter, HDShaderIDs._TemporalAccumuationWeight, rtEnvironement.reflTemporalAccumulationWeight);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._AccumulatedFrameTexture, history);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._CurrentFrameTexture, outputTexture);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, "_MinColorRangeTexture", m_MinBoundBuffer);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, "_MaxColorRangeTexture", m_MaxBoundBuffer);
cmd.DispatchCompute(reflectionFilter, currentKernel, numTilesXFR, numTilesYFR, 1);
}
break;
case HDRaytracingEnvironment.ReflectionsQuality.Integration:
{
switch (rtEnvironement.reflFilterMode)
{
case HDRaytracingEnvironment.ReflectionsFilterMode.SpatioTemporal:
{
// Grab the history buffer
RTHandleSystem.RTHandle reflectionHistory = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedReflection)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedReflection, ReflectionHistoryBufferAllocatorFunction, 1);
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesX = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesY = (texHeight + (areaTileSize - 1)) / areaTileSize;
int m_KernelFilter = reflectionFilter.FindKernel("RaytracingReflectionTAA");
// Compute the combined TAA frame
var historyScale = new Vector2(hdCamera.actualWidth / (float)reflectionHistory.rt.width, hdCamera.actualHeight / (float)reflectionHistory.rt.height);
cmd.SetComputeVectorParam(reflectionFilter, HDShaderIDs._ScreenToTargetScaleHistory, historyScale);
cmd.SetComputeTextureParam(reflectionFilter, m_KernelFilter, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(reflectionFilter, m_KernelFilter, HDShaderIDs._DenoiseInputTexture, m_LightingTexture);
cmd.SetComputeTextureParam(reflectionFilter, m_KernelFilter, HDShaderIDs._DenoiseOutputTextureRW, m_HitPdfTexture);
cmd.SetComputeTextureParam(reflectionFilter, m_KernelFilter, HDShaderIDs._ReflectionHistorybufferRW, reflectionHistory);
cmd.DispatchCompute(reflectionFilter, m_KernelFilter, numTilesX, numTilesY, 1);
// Output the new history
HDUtils.BlitCameraTexture(cmd, hdCamera, m_HitPdfTexture, reflectionHistory);
m_KernelFilter = reflectionFilter.FindKernel("ReflBilateralFilterH");
// Horizontal pass of the bilateral filter
cmd.SetComputeIntParam(reflectionFilter, HDShaderIDs._RaytracingDenoiseRadius, rtEnvironement.reflFilterRadius);
cmd.SetComputeTextureParam(reflectionFilter, m_KernelFilter, HDShaderIDs._DenoiseInputTexture, reflectionHistory);
cmd.SetComputeTextureParam(reflectionFilter, m_KernelFilter, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(reflectionFilter, m_KernelFilter, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(reflectionFilter, m_KernelFilter, HDShaderIDs._DenoiseOutputTextureRW, m_HitPdfTexture);
cmd.DispatchCompute(reflectionFilter, m_KernelFilter, numTilesX, numTilesY, 1);
m_KernelFilter = reflectionFilter.FindKernel("ReflBilateralFilterV");
// Horizontal pass of the bilateral filter
cmd.SetComputeIntParam(reflectionFilter, HDShaderIDs._RaytracingDenoiseRadius, rtEnvironement.reflFilterRadius);
cmd.SetComputeTextureParam(reflectionFilter, m_KernelFilter, HDShaderIDs._DenoiseInputTexture, m_HitPdfTexture);
cmd.SetComputeTextureParam(reflectionFilter, m_KernelFilter, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(reflectionFilter, m_KernelFilter, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(reflectionFilter, m_KernelFilter, HDShaderIDs._DenoiseOutputTextureRW, outputTexture);
cmd.DispatchCompute(reflectionFilter, m_KernelFilter, numTilesX, numTilesY, 1);
}
break;
case HDRaytracingEnvironment.ReflectionsFilterMode.None:
{
HDUtils.BlitCameraTexture(cmd, hdCamera, m_LightingTexture, outputTexture);
}
break;
}
}
break;
}
}
}
public void Render(HDCamera hdCamera, CommandBuffer cmd, RTHandleSystem.RTHandle outputTexture, ScriptableRenderContext renderContext, CullingResults cull)
{
// First thing to check is: Do we have a valid ray-tracing environment?
HDRaytracingEnvironment rtEnvironement = m_RaytracingManager.CurrentEnvironment();
BlueNoise blueNoise = m_RaytracingManager.GetBlueNoiseManager();
RaytracingShader forwardShader = m_PipelineAsset.renderPipelineResources.shaders.forwardRaytracing;
Shader raytracingMask = m_PipelineAsset.renderPipelineResources.shaders.raytracingFlagMask;
// Try to grab the acceleration structure and the list of HD lights for the target camera
RaytracingAccelerationStructure accelerationStructure = m_RaytracingManager.RequestAccelerationStructure(hdCamera);
HDRaytracingLightCluster lightCluster = m_RaytracingManager.RequestLightCluster(hdCamera);
bool missingResources = rtEnvironement == null || blueNoise == null || forwardShader == null || raytracingMask == null || accelerationStructure == null ||
lightCluster == null || m_PipelineResources.textures.owenScrambledTex == null || m_PipelineResources.textures.scramblingTex == null;
// If any resource or game-object is missing We stop right away
if (missingResources || !rtEnvironement.raytracedObjects)
{
return;
}
if (m_RaytracingFlagMaterial == null)
{
m_RaytracingFlagMaterial = CoreUtils.CreateEngineMaterial(raytracingMask);
}
// Before going into raytracing, we need to flag which pixels needs to be raytracing
EvaluateRaytracingMask(cull, hdCamera, cmd, renderContext);
// 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, m_RayGenShaderName, HDShaderIDs._OwenScrambledTexture, m_PipelineResources.textures.owenScrambledTex);
cmd.SetRaytracingTextureParam(forwardShader, m_RayGenShaderName, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironement.rayBias);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayMaxLength, rtEnvironement.raytracingRayLength);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingMaxRecursion, rtEnvironement.rayMaxDepth);
// Set the data for the ray generation
cmd.SetRaytracingTextureParam(forwardShader, m_RayGenShaderName, HDShaderIDs._RaytracingFlagMask, m_RaytracingFlagTarget);
cmd.SetRaytracingTextureParam(forwardShader, m_RayGenShaderName, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRaytracingTextureParam(forwardShader, m_RayGenShaderName, HDShaderIDs._CameraColorTextureRW, outputTexture);
// Compute the pixel spread value
float pixelSpreadAngle = Mathf.Atan(2.0f * Mathf.Tan(hdCamera.camera.fieldOfView * Mathf.PI / 360.0f) / Mathf.Min(hdCamera.actualWidth, hdCamera.actualHeight));
cmd.SetRaytracingFloatParam(forwardShader, HDShaderIDs._PixelSpreadAngle, pixelSpreadAngle);
// Set the light cluster data if available
{
// 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, rtEnvironement.maxNumLightsPercell);
cmd.SetGlobalInt(HDShaderIDs._PunctualLightCountRT, lightCluster.GetPunctualLightCount());
cmd.SetGlobalInt(HDShaderIDs._AreaLightCountRT, lightCluster.GetAreaLightCount());
}
// Set the data for the ray miss
cmd.SetRaytracingTextureParam(forwardShader, m_MissShaderName, HDShaderIDs._SkyTexture, m_SkyManager.skyReflection);
// Run the calculus
cmd.DispatchRays(forwardShader, m_RayGenShaderName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
}
