public void Render(CommandBuffer cmd, HDCamera camera, 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());
return;
}
else
{
#if ENABLE_RAYTRACING
HDRaytracingEnvironment rtEnvironement = m_RayTracingManager.CurrentEnvironment();
if (camera.frameSettings.IsEnabled(FrameSettingsField.RayTracing) && rtEnvironement != null && settings.rayTracing.value)
{
m_RaytracingAmbientOcclusion.RenderAO(camera, cmd, m_AmbientOcclusionTex, renderContext, frameCount);
}
else
#endif
{
Dispatch(cmd, camera, frameCount);
PostDispatchWork(cmd, camera);
}
}
}
void BuildLightCluster(CommandBuffer cmd, ComputeShader lightClusterCS, HDRaytracingEnvironment currentEnv)
{
using (new ProfilingSample(cmd, "Build Light Cluster", CustomSamplerId.RaytracingBuildCluster.GetSampler()))
{
var lightClusterSettings = VolumeManager.instance.stack.GetComponent <LightCluster>();
numLightsPerCell = lightClusterSettings.maxNumLightsPercell.value;
// Make sure the Cluster buffer has the right size
int bufferSize = 64 * 64 * 32 * (numLightsPerCell + 4);
if (m_LightCluster.count != bufferSize)
{
ResizeClusterBuffer(bufferSize);
}
// Grab the kernel
int lightClusterKernel = lightClusterCS.FindKernel(m_LightClusterKernelName);
// Inject all the parameters
cmd.SetComputeBufferParam(lightClusterCS, lightClusterKernel, HDShaderIDs._RaytracingLightCluster, m_LightCluster);
cmd.SetComputeVectorParam(lightClusterCS, HDShaderIDs._MinClusterPos, minClusterPos);
cmd.SetComputeVectorParam(lightClusterCS, HDShaderIDs._MaxClusterPos, maxClusterPos);
cmd.SetComputeVectorParam(lightClusterCS, _ClusterCellSize, clusterCellSize);
cmd.SetComputeFloatParam(lightClusterCS, HDShaderIDs._LightPerCellCount, HDShadowUtils.Asfloat(numLightsPerCell));
cmd.SetComputeBufferParam(lightClusterCS, lightClusterKernel, _LightVolumes, m_LightVolumeGPUArray);
cmd.SetComputeFloatParam(lightClusterCS, _LightVolumeCount, HDShadowUtils.Asfloat(totalLightCount));
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);
}
}
void BindRayTracedReflectionData(CommandBuffer cmd, HDCamera hdCamera, HDRaytracingEnvironment rtEnvironment, RayTracingShader reflectionShader, ScreenSpaceReflection settings, LightCluster lightClusterSettings)
{
// Grab the acceleration structures and the light cluster to use
RayTracingAccelerationStructure accelerationStructure = m_RayTracingManager.RequestAccelerationStructure(rtEnvironment.reflLayerMask);
HDRaytracingLightCluster lightCluster = m_RayTracingManager.RequestLightCluster(rtEnvironment.reflLayerMask);
BlueNoise blueNoise = m_RayTracingManager.GetBlueNoiseManager();
// Define the shader pass to use for the reflection pass
cmd.SetRayTracingShaderPass(reflectionShader, "IndirectDXR");
// Set the acceleration structure for the pass
cmd.SetRayTracingAccelerationStructure(reflectionShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Global reflection parameters
cmd.SetRayTracingFloatParams(reflectionShader, HDShaderIDs._RaytracingIntensityClamp, settings.clampValue.value);
cmd.SetRayTracingFloatParams(reflectionShader, HDShaderIDs._RaytracingReflectionMinSmoothness, settings.minSmoothness.value);
cmd.SetRayTracingIntParams(reflectionShader, HDShaderIDs._RaytracingIncludeSky, settings.reflectSky.value ? 1 : 0);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironment.rayBias);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayMaxLength, settings.rayLength.value);
cmd.SetRayTracingIntParams(reflectionShader, HDShaderIDs._RaytracingNumSamples, settings.sampleCount.value);
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)m_FrameCount % 8;
cmd.SetRayTracingIntParam(reflectionShader, HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Inject the ray-tracing sampling data
blueNoise.BindDitheredRNGData8SPP(cmd);
// Set the data for the ray generation
cmd.SetRayTracingTextureParam(reflectionShader, HDShaderIDs._SsrLightingTextureRW, m_ReflIntermediateTexture0);
cmd.SetRayTracingTextureParam(reflectionShader, HDShaderIDs._SsrHitPointTexture, m_ReflIntermediateTexture1);
cmd.SetRayTracingTextureParam(reflectionShader, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(reflectionShader, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
// Set ray count tex
cmd.SetRayTracingIntParam(reflectionShader, HDShaderIDs._RayCountEnabled, m_RayTracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRayTracingTextureParam(reflectionShader, HDShaderIDs._RayCountTexture, m_RayTracingManager.rayCountManager.GetRayCountTexture());
// Compute the pixel spread value
float pixelSpreadAngle = Mathf.Atan(2.0f * Mathf.Tan(hdCamera.camera.fieldOfView * Mathf.PI / 360.0f) / Mathf.Min(hdCamera.actualWidth, hdCamera.actualHeight));
cmd.SetGlobalFloat(HDShaderIDs._RaytracingPixelSpreadAngle, pixelSpreadAngle);
// Bind the lightLoop data
lightCluster.BindLightClusterData(cmd);
// Note: Just in case, we rebind the directional light data (in case they were not)
cmd.SetGlobalBuffer(HDShaderIDs._DirectionalLightDatas, m_LightLoopLightData.directionalLightData);
cmd.SetGlobalInt(HDShaderIDs._DirectionalLightCount, m_lightList.directionalLights.Count);
// Evaluate the clear coat mask texture based on the lit shader mode
RenderTargetIdentifier clearCoatMaskTexture = hdCamera.frameSettings.litShaderMode == LitShaderMode.Deferred ? m_GbufferManager.GetBuffersRTI()[2] : TextureXR.GetBlackTexture();
cmd.SetRayTracingTextureParam(reflectionShader, HDShaderIDs._SsrClearCoatMaskTexture, clearCoatMaskTexture);
// Set the number of bounces for reflections
cmd.SetGlobalInt(HDShaderIDs._RaytracingMaxRecursion, settings.bounceCount.value);
}
public bool ValidIndirectDiffuseState(HDCamera hdCamera)
{
// First thing to check is: Do we have a valid ray-tracing environment?
HDRaytracingEnvironment rtEnvironment = m_RayTracingManager.CurrentEnvironment();
var settings = VolumeManager.instance.stack.GetComponent <GlobalIllumination>();
return(!(!hdCamera.frameSettings.IsEnabled(FrameSettingsField.RayTracing) || rtEnvironment == null || !settings.enableRayTracing.value));
}
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();
}
}
// This function finds which sub-scenes 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.lights);
// It doesn't need RAS update anymore
currentSubScene.needUpdate = false;
}
}
}
public void UnregisterEnvironment(HDRaytracingEnvironment targetEnvironment)
{
if (m_Environments.Contains(targetEnvironment))
{
// Add this graph
m_Environments.Remove(targetEnvironment);
m_DirtyEnvironment = true;
// Now that a new environment has been removed, we need to update
UpdateEnvironmentSubScenes();
}
}
public void EvaluateLightClusters(CommandBuffer cmd, HDCamera hdCamera, HDRayTracingLights rayTracingLights)
{
// Grab the current ray-tracing environment, if no environment available stop right away
HDRaytracingEnvironment currentEnv = m_RaytracingManager.CurrentEnvironment();
ComputeShader lightClusterCS = m_RenderPipelineRayTracingResources.lightClusterBuildCS;
// If there is no lights to process or no environment not the shader is missing
if (currentEnv == null || (rayTracingLights.hdLightArray.Count == 0 && rayTracingLights.reflectionProbeArray.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(rayTracingLights);
// Evaluate the volume of the cluster
EvaluateClusterVolume(currentEnv, hdCamera);
// Cull the lights within the evaluated cluster range
CullLights(cmd, lightClusterCS);
// Build the light Cluster
BuildLightCluster(cmd, lightClusterCS, currentEnv);
// Build the light data
BuildLightData(cmd, hdCamera, rayTracingLights.hdLightArray);
// Build the light data
BuildEnvLightData(cmd, hdCamera, rayTracingLights);
// Generate the debug view
EvaluateClusterDebugView(cmd, hdCamera, currentEnv);
}
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;
}
// Grab the kernel
int m_LightClusterDebugKernel = lightClusterDebugCS.FindKernel("DebugLightCluster");
// Inject all the parameters to the debug compute
cmd.SetComputeBufferParam(lightClusterDebugCS, m_LightClusterDebugKernel, HDShaderIDs._RaytracingLightCluster, m_LightCluster);
cmd.SetComputeVectorParam(lightClusterDebugCS, HDShaderIDs._MinClusterPos, minClusterPos);
cmd.SetComputeVectorParam(lightClusterDebugCS, HDShaderIDs._MaxClusterPos, maxClusterPos);
cmd.SetComputeVectorParam(lightClusterDebugCS, _ClusterCellSize, clusterCellSize);
cmd.SetComputeFloatParam(lightClusterDebugCS, HDShaderIDs._LightPerCellCount, HDShadowUtils.Asfloat(numLightsPerCell));
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);
}
void RenderReflectionsT2(HDCamera hdCamera, CommandBuffer cmd, RTHandle outputTexture, ScriptableRenderContext renderContext, int frameCount)
{
// Fetch the shaders that we will be using
HDRaytracingEnvironment rtEnvironment = m_RayTracingManager.CurrentEnvironment();
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);
// Only use the shader variant that has multi bounce if the bounce count > 1
CoreUtils.SetKeyword(cmd, "MULTI_BOUNCE_INDIRECT", settings.bounceCount.value > 1);
// We are not in the diffuse only case
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTING_ONLY", false);
// Run the computation
cmd.DispatchRays(reflectionShader, m_RayGenIntegrationName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
// Disable multi-bounce
CoreUtils.SetKeyword(cmd, "MULTI_BOUNCE_INDIRECT", false);
using (new ProfilingSample(cmd, "Filter Reflection", CustomSamplerId.RaytracingFilterReflection.GetSampler()))
{
if (settings.denoise.value)
{
// Grab the history buffer
RTHandle reflectionHistory = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedReflection)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedReflection, ReflectionHistoryBufferAllocatorFunction, 1);
HDSimpleDenoiser simpleDenoiser = m_RayTracingManager.GetSimpleDenoiser();
simpleDenoiser.DenoiseBuffer(cmd, hdCamera, m_ReflIntermediateTexture0, reflectionHistory, outputTexture, settings.denoiserRadius.value, singleChannel: false);
}
else
{
HDUtils.BlitCameraTexture(cmd, m_ReflIntermediateTexture0, outputTexture);
}
}
}
public void EvaluateLightClusters(CommandBuffer cmd, HDCamera hdCamera, HDRayTracingLights rayTracingLights)
{
// Grab the current ray-tracing environment, if no environment available stop right away
HDRaytracingEnvironment currentEnv = m_RaytracingManager.CurrentEnvironment();
ComputeShader lightClusterCS = m_RenderPipelineRayTracingResources.lightClusterBuildCS;
// If there is no lights to process or no environment not the shader is missing
if (currentEnv == null || (rayTracingLights.hdLightArray.Count == 0 && rayTracingLights.reflectionProbeArray.Count == 0))
{
InvalidateCluster();
return;
}
// Build the Light volumes
BuildGPULightVolumes(rayTracingLights);
// If no valid light were found, invalidate the cluster and leave
if (totalLightCount == 0)
{
InvalidateCluster();
return;
}
// Evaluate the volume of the cluster
EvaluateClusterVolume(currentEnv, hdCamera);
// Cull the lights within the evaluated cluster range
CullLights(cmd, lightClusterCS);
// Build the light Cluster
BuildLightCluster(cmd, lightClusterCS, currentEnv);
// Build the light data
BuildLightData(cmd, hdCamera, rayTracingLights.hdLightArray);
// Build the light data
BuildEnvLightData(cmd, hdCamera, rayTracingLights);
// Generate the debug view
EvaluateClusterDebugView(cmd, hdCamera, currentEnv);
}
public void RenderIndirectDiffuseT2(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, int frameCount)
{
// First thing to check is: Do we have a valid ray-tracing environment?
HDRaytracingEnvironment rtEnvironment = m_RayTracingManager.CurrentEnvironment();
var settings = VolumeManager.instance.stack.GetComponent <GlobalIllumination>();
// Shaders that are used
RayTracingShader indirectDiffuseRT = m_Asset.renderPipelineRayTracingResources.indirectDiffuseRaytracingRT;
var lightClusterSettings = VolumeManager.instance.stack.GetComponent <LightCluster>();
BindRayTracedIndirectDiffuseData(cmd, hdCamera, rtEnvironment, indirectDiffuseRT, settings, lightClusterSettings);
// Compute the actual resolution that is needed base on the quality
int widthResolution = hdCamera.actualWidth;
int heightResolution = hdCamera.actualHeight;
// Only use the shader variant that has multi bounce if the bounce count > 1
CoreUtils.SetKeyword(cmd, "MULTI_BOUNCE_INDIRECT", settings.numBounces.value > 1);
// Run the computation
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTING_ONLY", true);
cmd.DispatchRays(indirectDiffuseRT, m_RayGenIndirectDiffuseIntegrationName, (uint)widthResolution, (uint)heightResolution, 1);
// Disable the keywords we do not need anymore
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTING_ONLY", false);
CoreUtils.SetKeyword(cmd, "MULTI_BOUNCE_INDIRECT", false);
if (settings.enableFilter.value)
{
// Grab the history buffer
RTHandle indirectDiffuseHistory = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedIndirectDiffuse)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedIndirectDiffuse, IndirectDiffuseHistoryBufferAllocatorFunction, 1);
HDSimpleDenoiser simpleDenoiser = m_RayTracingManager.GetSimpleDenoiser();
simpleDenoiser.DenoiseBuffer(cmd, hdCamera, m_IDIntermediateBuffer0, indirectDiffuseHistory, m_IDIntermediateBuffer1, settings.filterRadius.value, singleChannel: false);
HDUtils.BlitCameraTexture(cmd, m_IDIntermediateBuffer1, m_IDIntermediateBuffer0);
}
}
// 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);
}
}
void EvaluateClusterVolume(HDRaytracingEnvironment currentEnv, HDCamera hdCamera)
{
var settings = VolumeManager.instance.stack.GetComponent <LightCluster>();
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 < totalLightCount; ++lightIdx)
{
minClusterPos.x = Mathf.Min(m_LightVolumesCPUArray[lightIdx].position.x - m_LightVolumesCPUArray[lightIdx].range.x, minClusterPos.x);
minClusterPos.y = Mathf.Min(m_LightVolumesCPUArray[lightIdx].position.y - m_LightVolumesCPUArray[lightIdx].range.y, minClusterPos.y);
minClusterPos.z = Mathf.Min(m_LightVolumesCPUArray[lightIdx].position.z - m_LightVolumesCPUArray[lightIdx].range.z, minClusterPos.z);
maxClusterPos.x = Mathf.Max(m_LightVolumesCPUArray[lightIdx].position.x + m_LightVolumesCPUArray[lightIdx].range.x, maxClusterPos.x);
maxClusterPos.y = Mathf.Max(m_LightVolumesCPUArray[lightIdx].position.y + m_LightVolumesCPUArray[lightIdx].range.y, maxClusterPos.y);
maxClusterPos.z = Mathf.Max(m_LightVolumesCPUArray[lightIdx].position.z + m_LightVolumesCPUArray[lightIdx].range.z, maxClusterPos.z);
}
minClusterPos.x = minClusterPos.x < clusterCenter.x - settings.cameraClusterRange.value ? clusterCenter.x - settings.cameraClusterRange.value : minClusterPos.x;
minClusterPos.y = minClusterPos.y < clusterCenter.y - settings.cameraClusterRange.value ? clusterCenter.y - settings.cameraClusterRange.value : minClusterPos.y;
minClusterPos.z = minClusterPos.z < clusterCenter.z - settings.cameraClusterRange.value ? clusterCenter.z - settings.cameraClusterRange.value : minClusterPos.z;
maxClusterPos.x = maxClusterPos.x > clusterCenter.x + settings.cameraClusterRange.value ? clusterCenter.x + settings.cameraClusterRange.value : maxClusterPos.x;
maxClusterPos.y = maxClusterPos.y > clusterCenter.y + settings.cameraClusterRange.value ? clusterCenter.y + settings.cameraClusterRange.value : maxClusterPos.y;
maxClusterPos.z = maxClusterPos.z > clusterCenter.z + settings.cameraClusterRange.value ? clusterCenter.z + settings.cameraClusterRange.value : 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);
}
public void RenderIndirectDiffuseT2(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, int frameCount)
{
// First thing to check is: Do we have a valid ray-tracing environment?
HDRaytracingEnvironment rtEnvironment = m_RayTracingManager.CurrentEnvironment();
var settings = VolumeManager.instance.stack.GetComponent <GlobalIllumination>();
// Shaders that are used
RayTracingShader indirectDiffuseRT = m_Asset.renderPipelineRayTracingResources.indirectDiffuseRaytracingRT;
var lightClusterSettings = VolumeManager.instance.stack.GetComponent <LightCluster>();
BindRayTracedIndirectDiffuseData(cmd, hdCamera, rtEnvironment, indirectDiffuseRT, settings, lightClusterSettings);
// Compute the actual resolution that is needed base on the quality
int widthResolution = hdCamera.actualWidth;
int heightResolution = hdCamera.actualHeight;
// Only use the shader variant that has multi bounce if the bounce count > 1
CoreUtils.SetKeyword(cmd, "MULTI_BOUNCE_INDIRECT", settings.bounceCount.value > 1);
// Run the computation
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTING_ONLY", true);
cmd.DispatchRays(indirectDiffuseRT, m_RayGenIndirectDiffuseIntegrationName, (uint)widthResolution, (uint)heightResolution, 1);
// Disable the keywords we do not need anymore
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTING_ONLY", false);
CoreUtils.SetKeyword(cmd, "MULTI_BOUNCE_INDIRECT", false);
using (new ProfilingSample(cmd, "Filter Indirect Diffuse", CustomSamplerId.RaytracingFilterIndirectDiffuse.GetSampler()))
{
if (settings.denoise.value)
{
DenoiseIndirectDiffuseBuffer(hdCamera, cmd, settings);
}
}
}
bool RenderLightScreenSpaceShadows(HDCamera hdCamera, CommandBuffer cmd)
{
// Fetch the ray tracing environment
HDRaytracingEnvironment rtEnvironment = m_RayTracingManager.CurrentEnvironment();
// If invalid state, we stop right away
if (!hdCamera.frameSettings.IsEnabled(FrameSettingsField.RayTracing) || rtEnvironment == null)
{
return(false);
}
// Grab the history buffer
RTHandle shadowHistoryArray = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedShadow)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedShadow, ShadowHistoryBufferAllocatorFunction, 1);
// Grab the acceleration structure for the target camera
RayTracingAccelerationStructure accelerationStructure = m_RayTracingManager.RequestAccelerationStructure(rtEnvironment.shadowLayerMask);
// Set the acceleration structure for the pass
cmd.SetRayTracingAccelerationStructure(m_ScreenSpaceShadowsRT, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Define the shader pass to use for the reflection pass
cmd.SetRayTracingShaderPass(m_ScreenSpaceShadowsRT, "VisibilityDXR");
// Inject the ray-tracing sampling data
m_BlueNoise.BindDitheredRNGData8SPP(cmd);
// Compute and inject the frame data
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)m_FrameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironment.rayBias);
using (new ProfilingSample(cmd, "Ray Traced Shadows", CustomSamplerId.RaytracingShadowIntegration.GetSampler()))
{
// Loop through all the potential screen space light shadows
for (int lightIdx = 0; lightIdx < m_ScreenSpaceShadowIndex; ++lightIdx)
{
// This matches the directional light
if (!m_CurrentScreenSpaceShadowData[lightIdx].valid)
{
continue;
}
// Fetch the light data and additional light data
LightData currentLight = m_lightList.lights[m_CurrentScreenSpaceShadowData[lightIdx].lightDataIndex];
HDAdditionalLightData currentAdditionalLightData = m_CurrentScreenSpaceShadowData[lightIdx].additionalLightData;
// Trigger the right algorithm based on the light type
switch (currentLight.lightType)
{
case GPULightType.Rectangle:
{
RenderAreaScreenSpaceShadow(cmd, hdCamera, rtEnvironment, currentLight, currentAdditionalLightData, m_CurrentScreenSpaceShadowData[lightIdx].lightDataIndex, shadowHistoryArray);
}
break;
case GPULightType.Point:
{
RenderPunctualScreenSpaceShadow(cmd, hdCamera, rtEnvironment, currentLight, currentAdditionalLightData, m_CurrentScreenSpaceShadowData[lightIdx].lightDataIndex, shadowHistoryArray);
}
break;
}
}
}
return(true);
}
public void BindRayTracedIndirectDiffuseData(CommandBuffer cmd, HDCamera hdCamera, HDRaytracingEnvironment rtEnvironment, RayTracingShader indirectDiffuseShader, GlobalIllumination settings, LightCluster lightClusterSettings)
{
// Grab the acceleration structures and the light cluster to use
RayTracingAccelerationStructure accelerationStructure = m_RayTracingManager.RequestAccelerationStructure(rtEnvironment.indirectDiffuseLayerMask);
HDRaytracingLightCluster lightCluster = m_RayTracingManager.RequestLightCluster(rtEnvironment.indirectDiffuseLayerMask);
// Define the shader pass to use for the indirect diffuse pass
cmd.SetRayTracingShaderPass(indirectDiffuseShader, "IndirectDXR");
// Set the acceleration structure for the pass
cmd.SetRayTracingAccelerationStructure(indirectDiffuseShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
cmd.SetGlobalTexture(HDShaderIDs._OwenScrambledRGTexture, m_Asset.renderPipelineResources.textures.owenScrambledRGBATex);
cmd.SetGlobalTexture(HDShaderIDs._OwenScrambledTexture, m_Asset.renderPipelineResources.textures.owenScrambled256Tex);
cmd.SetGlobalTexture(HDShaderIDs._ScramblingTexture, m_Asset.renderPipelineResources.textures.scramblingTex);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironment.rayBias);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayMaxLength, settings.rayLength.value);
cmd.SetRayTracingIntParams(indirectDiffuseShader, HDShaderIDs._RaytracingNumSamples, settings.numSamples.value);
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)m_FrameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Set the data for the ray generation
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._IndirectDiffuseTextureRW, m_IDIntermediateBuffer0);
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._IndirectDiffuseHitPointTextureRW, m_IDIntermediateBuffer1);
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
// Set the indirect diffuse parameters
cmd.SetRayTracingFloatParams(indirectDiffuseShader, HDShaderIDs._RaytracingIntensityClamp, settings.clampValue.value);
// Set ray count texture
cmd.SetRayTracingIntParam(indirectDiffuseShader, HDShaderIDs._RayCountEnabled, m_RayTracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._RayCountTexture, m_RayTracingManager.rayCountManager.rayCountTexture);
// Compute the pixel spread value
float pixelSpreadAngle = Mathf.Atan(2.0f * Mathf.Tan(hdCamera.camera.fieldOfView * Mathf.PI / 360.0f) / Mathf.Min(hdCamera.actualWidth, hdCamera.actualHeight));
cmd.SetRayTracingFloatParam(indirectDiffuseShader, HDShaderIDs._RaytracingPixelSpreadAngle, pixelSpreadAngle);
// LightLoop data
lightCluster.BindLightClusterData(cmd);
// Set the data for the ray miss
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._SkyTexture, m_SkyManager.skyReflection);
// Set the number of bounces to 1
cmd.SetGlobalInt(HDShaderIDs._RaytracingMaxRecursion, settings.numBounces.value);
}
void RenderDirectionalLightScreenSpaceShadow(CommandBuffer cmd, HDCamera hdCamera, int frameCount)
{
// Render directional screen space shadow if required
if (m_CurrentSunLightAdditionalLightData != null && m_CurrentSunLightAdditionalLightData.WillRenderScreenSpaceShadow())
{
#if ENABLE_RAYTRACING
// If the shadow is flagged as ray traced, we need to evaluate it completely
if (hdCamera.frameSettings.IsEnabled(FrameSettingsField.RayTracing) && m_CurrentSunLightAdditionalLightData.WillRenderRayTracedShadow())
{
HDRaytracingEnvironment rtEnvironment = m_RayTracingManager.CurrentEnvironment();
ComputeShader shadowsCompute = m_Asset.renderPipelineRayTracingResources.shadowRaytracingCS;
RayTracingShader shadowRayTrace = m_Asset.renderPipelineRayTracingResources.shadowRaytracingRT;
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesX = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesY = (texHeight + (areaTileSize - 1)) / areaTileSize;
int shadowComputeKernel = shadowsCompute.FindKernel("ClearShadowTexture");
cmd.SetComputeBufferParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._LightDatas, m_LightLoopLightData.lightData);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedDirectionalShadowIntegration, m_DenoiseBuffer0);
cmd.DispatchCompute(shadowsCompute, shadowComputeKernel, numTilesX, numTilesY, 1);
cmd.SetGlobalTexture(HDShaderIDs._OwenScrambledRGTexture, m_Asset.renderPipelineResources.textures.owenScrambledRGBATex);
cmd.SetGlobalTexture(HDShaderIDs._OwenScrambledTexture, m_Asset.renderPipelineResources.textures.owenScrambled256Tex);
cmd.SetGlobalTexture(HDShaderIDs._ScramblingTexture, m_Asset.renderPipelineResources.textures.scramblingTex);
for (int i = 0; i < m_CurrentSunLightAdditionalLightData.numRayTracingSamples; ++i)
{
shadowComputeKernel = shadowsCompute.FindKernel("RaytracingDirectionalShadowSample");
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)frameCount % 8;
// This pass evaluates the analytic value and the generates and outputs the first sample
cmd.SetComputeBufferParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._LightDatas, m_LightLoopLightData.lightData);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingFrameIndex, frameIndex);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingNumSamples, m_CurrentSunLightAdditionalLightData.numRayTracingSamples);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingSampleIndex, i);
cmd.SetComputeMatrixParam(shadowsCompute, HDShaderIDs._RaytracingAreaWorldToLocal, worldToLocalArea);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedDirectionalShadowIntegration, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetComputeFloatParam(shadowsCompute, HDShaderIDs._DirectionalLightAngle, m_CurrentSunLightAdditionalLightData.sunLightConeAngle);
cmd.DispatchCompute(shadowsCompute, shadowComputeKernel, numTilesX, numTilesY, 1);
// Grab the acceleration structure for the target camera
RayTracingAccelerationStructure accelerationStructure = m_RayTracingManager.RequestAccelerationStructure(rtEnvironment.shadowLayerMask);
// Define the shader pass to use for the reflection pass
cmd.SetRayTracingShaderPass(shadowRayTrace, "VisibilityDXR");
// Set the acceleration structure for the pass
cmd.SetRayTracingAccelerationStructure(shadowRayTrace, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// This pass will use the previously generated sample and add it to the integration buffer
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RaytracedDirectionalShadowIntegration, m_DenoiseBuffer0);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetRayTracingFloatParam(shadowRayTrace, HDShaderIDs._DirectionalLightAngle, m_CurrentSunLightAdditionalLightData.sunLightConeAngle);
cmd.SetRayTracingIntParam(shadowRayTrace, HDShaderIDs._RaytracingNumSamples, 1);
cmd.DispatchRays(shadowRayTrace, m_RayGenDirectionalShadowSingleName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
}
RTHandle shadowHistoryArray = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedShadow)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedShadow, ShadowHistoryBufferAllocatorFunction, 1);
// Apply the simple denoiser (if required)
if (m_CurrentSunLightAdditionalLightData.filterTracedShadow)
{
HDSimpleDenoiser simpleDenoiser = m_RayTracingManager.GetSimpleDenoiser();
simpleDenoiser.DenoiseBuffer(cmd, hdCamera, m_DenoiseBuffer0, shadowHistoryArray, m_DenoiseBuffer1, m_CurrentSunLightAdditionalLightData.filterSizeTraced, singleChannel: true, slotIndex: m_CurrentSunLightDirectionalLightData.screenSpaceShadowIndex);
}
else
{
HDUtils.BlitCameraTexture(cmd, m_DenoiseBuffer0, m_DenoiseBuffer1);
}
shadowComputeKernel = shadowsCompute.FindKernel("OutputShadowTexture");
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedDirectionalShadowIntegration, m_DenoiseBuffer1);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._ScreenSpaceShadowsTextureRW, m_ScreenSpaceShadowTextureArray);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingShadowSlot, m_CurrentSunLightDirectionalLightData.screenSpaceShadowIndex);
cmd.DispatchCompute(shadowsCompute, shadowComputeKernel, numTilesX, numTilesY, 1);
}
else
#endif
{
// If it is screen space but not ray traced, then we can rely on the shadow map
CoreUtils.SetRenderTarget(cmd, m_ScreenSpaceShadowTextureArray, depthSlice: m_CurrentSunLightDirectionalLightData.screenSpaceShadowIndex);
HDUtils.DrawFullScreen(cmd, s_ScreenSpaceShadowsMat, m_ScreenSpaceShadowTextureArray);
}
}
}
public void RenderReflectionsT1(HDCamera hdCamera, CommandBuffer cmd, RTHandle outputTexture, ScriptableRenderContext renderContext, int frameCount)
{
// Fetch the required resources
HDRaytracingEnvironment rtEnvironment = m_RayTracingManager.CurrentEnvironment();
BlueNoise blueNoise = m_RayTracingManager.GetBlueNoiseManager();
RayTracingShader reflectionShaderRT = m_Asset.renderPipelineRayTracingResources.reflectionRaytracingRT;
ComputeShader reflectionShaderCS = m_Asset.renderPipelineRayTracingResources.reflectionRaytracingCS;
ComputeShader reflectionFilter = m_Asset.renderPipelineRayTracingResources.reflectionBilateralFilterCS;
// Fetch all the settings
var settings = VolumeManager.instance.stack.GetComponent <ScreenSpaceReflection>();
LightCluster lightClusterSettings = VolumeManager.instance.stack.GetComponent <LightCluster>();
if (settings.deferredMode.value)
{
// Fetch the new sample kernel
int currentKernel = reflectionShaderCS.FindKernel(settings.fullResolution.value ? "RaytracingReflectionsFullRes" : "RaytracingReflectionsHalfRes");
// Inject the ray-tracing sampling data
blueNoise.BindDitheredRNGData8SPP(cmd);
// Bind all the required textures
cmd.SetComputeTextureParam(reflectionShaderCS, currentKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(reflectionShaderCS, currentKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
RenderTargetIdentifier clearCoatMaskTexture = hdCamera.frameSettings.litShaderMode == LitShaderMode.Deferred ? m_GbufferManager.GetBuffersRTI()[2] : TextureXR.GetBlackTexture();
cmd.SetComputeTextureParam(reflectionShaderCS, currentKernel, HDShaderIDs._SsrClearCoatMaskTexture, clearCoatMaskTexture);
// Bind all the required scalars
cmd.SetComputeFloatParam(reflectionShaderCS, HDShaderIDs._RaytracingIntensityClamp, settings.clampValue.value);
cmd.SetComputeFloatParam(reflectionShaderCS, HDShaderIDs._RaytracingReflectionMinSmoothness, settings.minSmoothness.value);
cmd.SetComputeIntParam(reflectionShaderCS, HDShaderIDs._RaytracingIncludeSky, settings.reflectSky.value ? 1 : 0);
// Bind the sampling data
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)m_FrameCount % 8;
cmd.SetComputeIntParam(reflectionShaderCS, HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Bind the output buffers
cmd.SetComputeTextureParam(reflectionShaderCS, currentKernel, HDShaderIDs._RaytracingDirectionBuffer, m_ReflIntermediateTexture1);
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
if (settings.fullResolution.value)
{
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesXHR = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesYHR = (texHeight + (areaTileSize - 1)) / areaTileSize;
// Compute the directions
cmd.DispatchCompute(reflectionShaderCS, currentKernel, numTilesXHR, numTilesYHR, 1);
}
else
{
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesXHR = (texWidth / 2 + (areaTileSize - 1)) / areaTileSize;
int numTilesYHR = (texHeight / 2 + (areaTileSize - 1)) / areaTileSize;
// Compute the directions
cmd.DispatchCompute(reflectionShaderCS, currentKernel, numTilesXHR, numTilesYHR, 1);
}
// Prepare the components for the deferred lighting
DeferredLightingRTParameters deferredParamters = PrepareReflectionDeferredLightingRTParameters(hdCamera, rtEnvironment);
DeferredLightingRTResources deferredResources = PrepareDeferredLightingRTResources(m_ReflIntermediateTexture1, m_ReflIntermediateTexture0);
// Evaluate the deferred lighting
RenderRaytracingDeferredLighting(cmd, deferredParamters, deferredResources);
}
else
{
// Bind all the required data for ray tracing
BindRayTracedReflectionData(cmd, hdCamera, rtEnvironment, reflectionShaderRT, settings, lightClusterSettings);
// Run the computation
if (settings.fullResolution.value)
{
cmd.DispatchRays(reflectionShaderRT, m_RayGenReflectionFullResName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
}
else
{
// Run the computation
cmd.DispatchRays(reflectionShaderRT, m_RayGenReflectionHalfResName, (uint)(hdCamera.actualWidth / 2), (uint)(hdCamera.actualHeight / 2), 1);
}
}
using (new ProfilingSample(cmd, "Filter Reflection", CustomSamplerId.RaytracingFilterReflection.GetSampler()))
{
// Fetch the right filter to use
int currentKernel = 0;
if (settings.fullResolution.value)
{
currentKernel = reflectionFilter.FindKernel("ReflectionIntegrationUpscaleFullRes");
}
else
{
currentKernel = reflectionFilter.FindKernel("ReflectionIntegrationUpscaleHalfRes");
}
// Inject all the parameters for the compute
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._SsrLightingTextureRW, m_ReflIntermediateTexture0);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._SsrHitPointTexture, m_ReflIntermediateTexture1);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._BlueNoiseTexture, blueNoise.textureArray16RGB);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, "_RaytracingReflectionTexture", outputTexture);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._ScramblingTexture, m_Asset.renderPipelineResources.textures.scramblingTex);
cmd.SetComputeIntParam(reflectionFilter, HDShaderIDs._SpatialFilterRadius, settings.upscaleRadius.value);
cmd.SetComputeIntParam(reflectionFilter, HDShaderIDs._RaytracingDenoiseRadius, settings.denoise.value ? settings.denoiserRadius.value : 0);
cmd.SetComputeFloatParam(reflectionFilter, HDShaderIDs._RaytracingReflectionMinSmoothness, settings.minSmoothness.value);
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesXHR = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesYHR = (texHeight + (areaTileSize - 1)) / areaTileSize;
// Bind the right texture for clear coat support
RenderTargetIdentifier clearCoatMaskTexture = hdCamera.frameSettings.litShaderMode == LitShaderMode.Deferred ? m_GbufferManager.GetBuffersRTI()[2] : TextureXR.GetBlackTexture();
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._SsrClearCoatMaskTexture, clearCoatMaskTexture);
// Compute the texture
cmd.DispatchCompute(reflectionFilter, currentKernel, numTilesXHR, numTilesYHR, 1);
using (new ProfilingSample(cmd, "Filter Reflection", CustomSamplerId.RaytracingFilterReflection.GetSampler()))
{
if (settings.denoise.value)
{
// Grab the history buffer
RTHandle reflectionHistory = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedReflection)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedReflection, ReflectionHistoryBufferAllocatorFunction, 1);
HDSimpleDenoiser simpleDenoiser = m_RayTracingManager.GetSimpleDenoiser();
simpleDenoiser.DenoiseBuffer(cmd, hdCamera, outputTexture, reflectionHistory, m_ReflIntermediateTexture0, settings.denoiserRadius.value, singleChannel: false);
HDUtils.BlitCameraTexture(cmd, m_ReflIntermediateTexture0, outputTexture);
}
}
}
}
public void RaytracingRecursiveRender(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, CullingResults cull)
{
// First thing to check is: Do we have a valid ray-tracing environment?
HDRaytracingEnvironment rtEnvironment = m_RayTracingManager.CurrentEnvironment();
RecursiveRendering recursiveSettings = VolumeManager.instance.stack.GetComponent <RecursiveRendering>();
// Check the validity of the state before computing the effect
bool invalidState = !hdCamera.frameSettings.IsEnabled(FrameSettingsField.RayTracing) ||
rtEnvironment == null ||
!recursiveSettings.enable.value ||
m_Asset.currentPlatformRenderPipelineSettings.supportedRaytracingTier == RenderPipelineSettings.RaytracingTier.Tier1;
// If any resource or game-object is missing We stop right away
if (invalidState)
{
return;
}
HDRenderPipeline renderPipeline = m_RayTracingManager.GetRenderPipeline();
RayTracingShader forwardShader = m_Asset.renderPipelineRayTracingResources.forwardRaytracing;
Shader raytracingMask = m_Asset.renderPipelineRayTracingResources.raytracingFlagMask;
LightCluster lightClusterSettings = VolumeManager.instance.stack.GetComponent <LightCluster>();
// Grab the acceleration structure and the list of HD lights for the target camera
RayTracingAccelerationStructure accelerationStructure = m_RayTracingManager.RequestAccelerationStructure(rtEnvironment.raytracedLayerMask);
HDRaytracingLightCluster lightCluster = m_RayTracingManager.RequestLightCluster(rtEnvironment.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, HDShaderIDs._OwenScrambledTexture, m_Asset.renderPipelineResources.textures.owenScrambledRGBATex);
cmd.SetRayTracingTextureParam(forwardShader, HDShaderIDs._ScramblingTexture, m_Asset.renderPipelineResources.textures.scramblingTex);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironment.rayBias);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayMaxLength, recursiveSettings.rayLength.value);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingMaxRecursion, recursiveSettings.maxDepth.value);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingCameraNearPlane, hdCamera.camera.nearClipPlane);
// Set the data for the ray generation
cmd.SetRayTracingTextureParam(forwardShader, HDShaderIDs._RaytracingFlagMask, m_RaytracingFlagTarget);
cmd.SetRayTracingTextureParam(forwardShader, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(forwardShader, HDShaderIDs._CameraColorTextureRW, m_CameraColorBuffer);
// Set ray count texture
cmd.SetRayTracingIntParam(forwardShader, HDShaderIDs._RayCountEnabled, m_RayTracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRayTracingTextureParam(forwardShader, HDShaderIDs._RayCountTexture, m_RayTracingManager.rayCountManager.GetRayCountTexture());
// 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, lightClusterSettings.maxNumLightsPercell.value);
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, renderPipeline.m_LightLoopLightData.directionalLightData);
cmd.SetGlobalInt(HDShaderIDs._DirectionalLightCount, renderPipeline.m_lightList.directionalLights.Count);
// Set the data for the ray miss
cmd.SetRayTracingTextureParam(forwardShader, 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 de-noised texture
HDRenderPipeline hdrp = (RenderPipelineManager.currentPipeline as HDRenderPipeline);
cmd.SetRayTracingTextureParam(forwardShader, HDShaderIDs._RaytracingPrimaryDebug, m_DebugRaytracingTexture);
hdrp.PushFullScreenDebugTexture(hdCamera, cmd, m_DebugRaytracingTexture, FullScreenDebugMode.RecursiveTracing);
// Run the computation
cmd.DispatchRays(forwardShader, m_RayGenShaderName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
}
public void PathTracingRender(HDCamera hdCamera, CommandBuffer cmd, RTHandle outputTexture, ScriptableRenderContext renderContext, int frameCount)
{
// First thing to check is: Do we have a valid ray-tracing environment?
HDRaytracingEnvironment rtEnvironment = m_RayTracingManager.CurrentEnvironment();
HDRenderPipeline renderPipeline = m_RayTracingManager.GetRenderPipeline();
RayTracingShader pathTracingShader = m_Asset.renderPipelineRayTracingResources.pathTracing;
PathTracing pathTracingSettings = VolumeManager.instance.stack.GetComponent <PathTracing>();
LightCluster lightClusterSettings = VolumeManager.instance.stack.GetComponent <LightCluster>();
// Check the validity of the state before computing the effect
bool invalidState = rtEnvironment == null || !pathTracingSettings.enable.value || pathTracingShader == null ||
m_Asset.renderPipelineResources.textures.owenScrambled256Tex == null ||
m_Asset.renderPipelineResources.textures.scramblingTex == null;
// If any resource or game-object is missing We stop right away
if (invalidState)
{
return;
}
// Grab the history buffer (hijack the reflections one)
RTHandle history = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.PathTracing)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.PathTracing, PathTracingHistoryBufferAllocatorFunction, 1);
// Grab the acceleration structure and the list of HD lights for the target camera
RayTracingAccelerationStructure accelerationStructure = m_RayTracingManager.RequestAccelerationStructure(rtEnvironment.raytracedLayerMask);
HDRaytracingLightCluster lightCluster = m_RayTracingManager.RequestLightCluster(rtEnvironment.raytracedLayerMask);
// Define the shader pass to use for the path tracing pass
cmd.SetRayTracingShaderPass(pathTracingShader, "PathTracingDXR");
// Set the acceleration structure for the pass
cmd.SetRayTracingAccelerationStructure(pathTracingShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
cmd.SetGlobalTexture(HDShaderIDs._OwenScrambledTexture, m_Asset.renderPipelineResources.textures.owenScrambled256Tex);
cmd.SetGlobalTexture(HDShaderIDs._ScramblingTexture, m_Asset.renderPipelineResources.textures.scramblingTex);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironment.rayBias);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingNumSamples, pathTracingSettings.maxSamples.value);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingMinRecursion, pathTracingSettings.minDepth.value);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingMaxRecursion, pathTracingSettings.maxDepth.value);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingIntensityClamp, pathTracingSettings.maxIntensity.value);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingCameraNearPlane, hdCamera.camera.nearClipPlane);
// Set the data for the ray generation
//cmd.SetRayTracingTextureParam(pathTracingShader, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(pathTracingShader, HDShaderIDs._CameraColorTextureRW, outputTexture);
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameCount);
// Compute an approximate pixel spread angle value (in radians)
float pixelSpreadAngle = hdCamera.camera.fieldOfView * (Mathf.PI / 180.0f) / Mathf.Min(hdCamera.actualWidth, hdCamera.actualHeight);
cmd.SetRayTracingFloatParam(pathTracingShader, 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());
// Note: directional lights are not supported atm
//cmd.SetGlobalBuffer(HDShaderIDs._DirectionalLightDatas, renderPipeline.directionalLightDatas);
//cmd.SetGlobalInt(HDShaderIDs._DirectionalLightCount, renderPipeline.m_lightList.directionalLights.Count);
// Set the data for the ray miss
cmd.SetRayTracingTextureParam(pathTracingShader, HDShaderIDs._SkyTexture, m_SkyManager.skyReflection);
// Additional data for path tracing
cmd.SetRayTracingTextureParam(pathTracingShader, HDShaderIDs._AccumulatedFrameTexture, history);
cmd.SetRayTracingMatrixParam(pathTracingShader, HDShaderIDs._PixelCoordToViewDirWS, hdCamera.mainViewConstants.pixelCoordToViewDirWS);
// Run the computation
cmd.DispatchRays(pathTracingShader, m_PathTracingRayGenShaderName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
}
DeferredLightingRTParameters PrepareReflectionDeferredLightingRTParameters(HDCamera hdCamera, HDRaytracingEnvironment rtEnv)
{
DeferredLightingRTParameters deferredParameters = new DeferredLightingRTParameters();
// Fetch the GI volume component
var settings = VolumeManager.instance.stack.GetComponent <ScreenSpaceReflection>();
// Make sure the binning buffer has the right size
CheckBinningBuffersSize(hdCamera);
// Generic attributes
deferredParameters.rayBinning = settings.rayBinning.value;
deferredParameters.layerMask = rtEnv.reflLayerMask;
deferredParameters.maxRayLength = settings.rayLength.value;
deferredParameters.clampValue = settings.clampValue.value;
deferredParameters.includeSky = settings.reflectSky.value;
deferredParameters.diffuseLightingOnly = false;
deferredParameters.halfResolution = !settings.fullResolution.value;
deferredParameters.rtEnv = rtEnv;
deferredParameters.rayCountFlag = m_RayTracingManager.rayCountManager.RayCountIsEnabled();
deferredParameters.preExpose = false;
// Camera data
deferredParameters.width = hdCamera.actualWidth;
deferredParameters.height = hdCamera.actualHeight;
deferredParameters.viewCount = hdCamera.viewCount;
deferredParameters.fov = hdCamera.camera.fieldOfView;
// Compute buffers
deferredParameters.rayBinResult = m_RayBinResult;
deferredParameters.rayBinSizeResult = m_RayBinSizeResult;
deferredParameters.accelerationStructure = m_RayTracingManager.RequestAccelerationStructure(rtEnv.reflLayerMask);
deferredParameters.lightCluster = m_RayTracingManager.RequestLightCluster(rtEnv.reflLayerMask);
// Shaders
deferredParameters.gBufferRaytracingRT = m_Asset.renderPipelineRayTracingResources.gBufferRaytracingRT;
deferredParameters.deferredRaytracingCS = m_Asset.renderPipelineRayTracingResources.deferredRaytracingCS;
deferredParameters.rayBinningCS = m_Asset.renderPipelineRayTracingResources.rayBinningCS;
// XRTODO: add ray binning support for single-pass
if (deferredParameters.viewCount > 1 && deferredParameters.rayBinning)
{
deferredParameters.rayBinning = false;
Debug.LogWarning("Ray binning is not supported with XR single-pass rendering!");
}
return(deferredParameters);
}
bool RenderAreaShadows(HDCamera hdCamera, CommandBuffer cmd, int frameCount)
{
// Let's check all the resources and states to see if we should render the effect
HDRaytracingEnvironment rtEnvironment = m_RayTracingManager.CurrentEnvironment();
// Make sure everything is valid
bool invalidState = !hdCamera.frameSettings.IsEnabled(FrameSettingsField.RayTracing) ||
rtEnvironment == null ||
hdCamera.frameSettings.litShaderMode != LitShaderMode.Deferred;
// If invalid state or ray-tracing acceleration structure, we stop right away
if (invalidState)
{
return(false);
}
RayTracingShader shadowRayTrace = m_Asset.renderPipelineRayTracingResources.shadowRaytracingRT;
ComputeShader shadowsCompute = m_Asset.renderPipelineRayTracingResources.shadowRaytracingCS;
ComputeShader shadowFilter = m_Asset.renderPipelineRayTracingResources.shadowFilterCS;
// Grab the TAA history buffers (SN/UN and Analytic value)
RTHandle shadowHistoryArray = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedShadow)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedShadow, ShadowHistoryBufferAllocatorFunction, 1);
RTHandle areaAnalyticHistoryArray = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedAreaAnalytic)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedAreaAnalytic, AreaAnalyticHistoryBufferAllocatorFunction, 1);
// Grab the acceleration structure for the target camera
RayTracingAccelerationStructure accelerationStructure = m_RayTracingManager.RequestAccelerationStructure(rtEnvironment.shadowLayerMask);
// Define the shader pass to use for the reflection pass
cmd.SetRayTracingShaderPass(shadowRayTrace, "VisibilityDXR");
// Set the acceleration structure for the pass
cmd.SetRayTracingAccelerationStructure(shadowRayTrace, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
cmd.SetGlobalTexture(HDShaderIDs._OwenScrambledRGTexture, m_Asset.renderPipelineResources.textures.owenScrambledRGBATex);
cmd.SetGlobalTexture(HDShaderIDs._OwenScrambledTexture, m_Asset.renderPipelineResources.textures.owenScrambled256Tex);
cmd.SetGlobalTexture(HDShaderIDs._ScramblingTexture, m_Asset.renderPipelineResources.textures.scramblingTex);
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)frameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Temporal Filtering kernels
int applyTAAKernel = shadowFilter.FindKernel("AreaShadowApplyTAA");
int updateAnalyticHistory = shadowFilter.FindKernel("AreaAnalyticHistoryCopy");
int updateShadowHistory = shadowFilter.FindKernel("AreaShadowHistoryCopy");
// Spatial Filtering kernels
int estimateNoiseKernel = shadowFilter.FindKernel("AreaShadowEstimateNoise");
int firstDenoiseKernel = shadowFilter.FindKernel("AreaShadowDenoiseFirstPass");
int secondDenoiseKernel = shadowFilter.FindKernel("AreaShadowDenoiseSecondPass");
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesX = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesY = (texHeight + (areaTileSize - 1)) / areaTileSize;
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironment.rayBias);
int numLights = m_lightList.lights.Count;
for (int lightIdx = 0; lightIdx < numLights; ++lightIdx)
{
// If this is not a rectangular area light or it won't have shadows, skip it
if (m_lightList.lights[lightIdx].lightType != GPULightType.Rectangle || m_lightList.lights[lightIdx].screenSpaceShadowIndex == -1)
{
continue;
}
LightData currentLight = m_lightList.lights[lightIdx];
HDAdditionalLightData currentAdditionalLightData = GetCurrentRayTracedShadow(currentLight.screenSpaceShadowIndex);
using (new ProfilingSample(cmd, "Ray Traced Area Shadow", CustomSamplerId.RaytracingShadowIntegration.GetSampler()))
{
// We need to build the world to area light matrix
worldToLocalArea.SetColumn(0, currentLight.right);
worldToLocalArea.SetColumn(1, currentLight.up);
worldToLocalArea.SetColumn(2, currentLight.forward);
// Compensate the relative rendering if active
Vector3 lightPositionWS = currentLight.positionRWS;
if (ShaderConfig.s_CameraRelativeRendering != 0)
{
lightPositionWS += hdCamera.camera.transform.position;
}
worldToLocalArea.SetColumn(3, lightPositionWS);
worldToLocalArea.m33 = 1.0f;
worldToLocalArea = worldToLocalArea.inverse;
// We have noticed from extensive profiling that ray-trace shaders are not as effective for running per-pixel computation. In order to reduce that,
// we do a first prepass that compute the analytic term and probability and generates the first integration sample
if (true)
{
int shadowComputeKernel = shadowsCompute.FindKernel("RaytracingAreaShadowPrepass");
// This pass evaluates the analytic value and the generates and outputs the first sample
cmd.SetComputeBufferParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._LightDatas, m_LightLoopLightData.lightData);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingTargetAreaLight, lightIdx);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingNumSamples, currentAdditionalLightData.numRayTracingSamples);
cmd.SetComputeMatrixParam(shadowsCompute, HDShaderIDs._RaytracingAreaWorldToLocal, worldToLocalArea);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[0], m_GbufferManager.GetBuffer(0));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[1], m_GbufferManager.GetBuffer(1));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[2], m_GbufferManager.GetBuffer(2));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[3], m_GbufferManager.GetBuffer(3));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._AreaCookieTextures, m_TextureCaches.areaLightCookieManager.GetTexCache());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedAreaShadowIntegration, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedAreaShadowSample, m_DenoiseBuffer1);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracingDistanceBuffer, m_RaytracingDistanceBuffer);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.DispatchCompute(shadowsCompute, shadowComputeKernel, numTilesX, numTilesY, 1);
// This pass will use the previously generated sample and add it to the integration buffer
cmd.SetRayTracingBufferParam(shadowRayTrace, HDShaderIDs._LightDatas, m_LightLoopLightData.lightData);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RaytracedAreaShadowSample, m_DenoiseBuffer1);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RaytracedAreaShadowIntegration, m_DenoiseBuffer0);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RaytracingDistanceBuffer, m_RaytracingDistanceBuffer);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.DispatchRays(shadowRayTrace, m_RayGenAreaShadowSingleName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
// Let's do the following samples (if any)
for (int sampleIndex = 1; sampleIndex < currentAdditionalLightData.numRayTracingSamples; ++sampleIndex)
{
shadowComputeKernel = shadowsCompute.FindKernel("RaytracingAreaShadowNewSample");
// This pass generates a new sample based on the initial pre-pass
cmd.SetComputeBufferParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._LightDatas, m_LightLoopLightData.lightData);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingTargetAreaLight, lightIdx);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingNumSamples, currentAdditionalLightData.numRayTracingSamples);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingSampleIndex, sampleIndex);
cmd.SetComputeMatrixParam(shadowsCompute, HDShaderIDs._RaytracingAreaWorldToLocal, worldToLocalArea);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[0], m_GbufferManager.GetBuffer(0));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[1], m_GbufferManager.GetBuffer(1));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[2], m_GbufferManager.GetBuffer(2));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[3], m_GbufferManager.GetBuffer(3));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._AreaCookieTextures, m_TextureCaches.areaLightCookieManager.GetTexCache());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedAreaShadowIntegration, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedAreaShadowSample, m_DenoiseBuffer1);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracingDistanceBuffer, m_RaytracingDistanceBuffer);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.DispatchCompute(shadowsCompute, shadowComputeKernel, numTilesX, numTilesY, 1);
// This pass will use the previously generated sample and add it to the integration buffer
cmd.SetRayTracingBufferParam(shadowRayTrace, HDShaderIDs._LightDatas, m_LightLoopLightData.lightData);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RaytracedAreaShadowSample, m_DenoiseBuffer1);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RaytracedAreaShadowIntegration, m_DenoiseBuffer0);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RaytracingDistanceBuffer, m_RaytracingDistanceBuffer);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.DispatchRays(shadowRayTrace, m_RayGenAreaShadowSingleName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
}
}
else
{
// This pass generates the analytic value and will do the full integration
cmd.SetRayTracingBufferParam(shadowRayTrace, HDShaderIDs._LightDatas, m_LightLoopLightData.lightData);
cmd.SetRayTracingIntParam(shadowRayTrace, HDShaderIDs._RaytracingTargetAreaLight, lightIdx);
cmd.SetRayTracingIntParam(shadowRayTrace, HDShaderIDs._RaytracingNumSamples, currentAdditionalLightData.numRayTracingSamples);
cmd.SetRayTracingMatrixParam(shadowRayTrace, HDShaderIDs._RaytracingAreaWorldToLocal, worldToLocalArea);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._GBufferTexture[0], m_GbufferManager.GetBuffer(0));
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._GBufferTexture[1], m_GbufferManager.GetBuffer(1));
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._GBufferTexture[2], m_GbufferManager.GetBuffer(2));
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._GBufferTexture[3], m_GbufferManager.GetBuffer(3));
cmd.SetRayTracingIntParam(shadowRayTrace, HDShaderIDs._RayCountEnabled, m_RayTracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RayCountTexture, m_RayTracingManager.rayCountManager.rayCountTexture);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._AreaCookieTextures, m_TextureCaches.areaLightCookieManager.GetTexCache());
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.SetRayTracingTextureParam(shadowRayTrace, HDShaderIDs._RaytracedAreaShadowIntegration, m_DenoiseBuffer0);
cmd.DispatchRays(shadowRayTrace, m_RayGenAreaShadowName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
}
}
using (new ProfilingSample(cmd, "Combine Area Shadow", CustomSamplerId.RaytracingShadowCombination.GetSampler()))
{
// Global parameters
cmd.SetComputeIntParam(shadowFilter, HDShaderIDs._RaytracingDenoiseRadius, currentAdditionalLightData.filterSizeTraced);
cmd.SetComputeIntParam(shadowFilter, HDShaderIDs._RaytracingShadowSlot, m_lightList.lights[lightIdx].screenSpaceShadowIndex);
// Apply a vectorized temporal filtering pass and store it back in the denoisebuffer0 with the analytic value in the third channel
var historyScale = new Vector2(hdCamera.actualWidth / (float)shadowHistoryArray.rt.width, hdCamera.actualHeight / (float)shadowHistoryArray.rt.height);
cmd.SetComputeVectorParam(shadowFilter, HDShaderIDs._RTHandleScaleHistory, historyScale);
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._AreaShadowHistory, shadowHistoryArray);
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._AnalyticHistoryBuffer, areaAnalyticHistoryArray);
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._DenoiseOutputTextureRW, m_DenoiseBuffer1);
cmd.DispatchCompute(shadowFilter, applyTAAKernel, numTilesX, numTilesY, 1);
// Update the shadow history buffer
cmd.SetComputeTextureParam(shadowFilter, updateAnalyticHistory, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.SetComputeTextureParam(shadowFilter, updateAnalyticHistory, HDShaderIDs._AnalyticHistoryBuffer, areaAnalyticHistoryArray);
cmd.DispatchCompute(shadowFilter, updateAnalyticHistory, numTilesX, numTilesY, 1);
// Update the analytic history buffer
cmd.SetComputeTextureParam(shadowFilter, updateShadowHistory, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer1);
cmd.SetComputeTextureParam(shadowFilter, updateShadowHistory, HDShaderIDs._AreaShadowHistoryRW, shadowHistoryArray);
cmd.DispatchCompute(shadowFilter, updateShadowHistory, numTilesX, numTilesY, 1);
if (currentAdditionalLightData.filterSizeTraced > 0)
{
// Inject parameters for noise estimation
cmd.SetComputeTextureParam(shadowFilter, estimateNoiseKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowFilter, estimateNoiseKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowFilter, estimateNoiseKernel, HDShaderIDs._ScramblingTexture, m_Asset.renderPipelineResources.textures.scramblingTex);
// Noise estimation pre-pass
cmd.SetComputeTextureParam(shadowFilter, estimateNoiseKernel, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer1);
cmd.SetComputeTextureParam(shadowFilter, estimateNoiseKernel, HDShaderIDs._DenoiseOutputTextureRW, m_DenoiseBuffer0);
cmd.DispatchCompute(shadowFilter, estimateNoiseKernel, numTilesX, numTilesY, 1);
// Reinject parameters for denoising
cmd.SetComputeTextureParam(shadowFilter, firstDenoiseKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowFilter, firstDenoiseKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowFilter, firstDenoiseKernel, HDShaderIDs._ScreenSpaceShadowsTextureRW, m_ScreenSpaceShadowTextureArray);
// First denoising pass
cmd.SetComputeTextureParam(shadowFilter, firstDenoiseKernel, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(shadowFilter, firstDenoiseKernel, HDShaderIDs._DenoiseOutputTextureRW, m_DenoiseBuffer1);
cmd.DispatchCompute(shadowFilter, firstDenoiseKernel, numTilesX, numTilesY, 1);
}
// Re-inject parameters for denoising
cmd.SetComputeTextureParam(shadowFilter, secondDenoiseKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowFilter, secondDenoiseKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowFilter, secondDenoiseKernel, HDShaderIDs._ScreenSpaceShadowsTextureRW, m_ScreenSpaceShadowTextureArray);
// Second (and final) denoising pass
cmd.SetComputeTextureParam(shadowFilter, secondDenoiseKernel, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer1);
cmd.DispatchCompute(shadowFilter, secondDenoiseKernel, numTilesX, numTilesY, 1);
}
}
return(true);
}
void RenderDirectionalLightScreenSpaceShadow(CommandBuffer cmd, HDCamera hdCamera)
{
// Render directional screen space shadow if required
if (m_CurrentSunLightAdditionalLightData != null && m_CurrentSunLightAdditionalLightData.WillRenderScreenSpaceShadow())
{
#if ENABLE_RAYTRACING
// Grab the ray tracing environment
HDRaytracingEnvironment rtEnvironment = m_RayTracingManager.CurrentEnvironment();
// If the shadow is flagged as ray traced, we need to evaluate it completely
if (rtEnvironment != null && hdCamera.frameSettings.IsEnabled(FrameSettingsField.RayTracing) &&
m_CurrentSunLightAdditionalLightData.WillRenderRayTracedShadow())
{
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesX = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesY = (texHeight + (areaTileSize - 1)) / areaTileSize;
// Clear the integration texture
cmd.SetComputeTextureParam(m_ScreenSpaceShadowsCS, m_ClearShadowTexture, HDShaderIDs._RaytracedDirectionalShadowIntegration, m_ShadowIntermediateBufferRGBA0);
cmd.DispatchCompute(m_ScreenSpaceShadowsCS, m_ClearShadowTexture, numTilesX, numTilesY, hdCamera.viewCount);
// Grab and bind the acceleration structure for the target camera
RayTracingAccelerationStructure accelerationStructure = m_RayTracingManager.RequestAccelerationStructure(rtEnvironment.shadowLayerMask);
cmd.SetRayTracingAccelerationStructure(m_ScreenSpaceShadowsRT, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
m_BlueNoise.BindDitheredRNGData8SPP(cmd);
// Compute the current frame index
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)m_FrameCount % 8;
cmd.SetComputeIntParam(m_ScreenSpaceShadowsCS, HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironment.rayBias);
// Loop through the samples of this frame
for (int sampleIdx = 0; sampleIdx < m_CurrentSunLightAdditionalLightData.numRayTracingSamples; ++sampleIdx)
{
// Bind the light & sampling data
cmd.SetComputeBufferParam(m_ScreenSpaceShadowsCS, m_RaytracingDirectionalShadowSample, HDShaderIDs._DirectionalLightDatas, m_LightLoopLightData.directionalLightData);
cmd.SetComputeIntParam(m_ScreenSpaceShadowsCS, HDShaderIDs._DirectionalShadowIndex, m_CurrentShadowSortedSunLightIndex);
cmd.SetComputeFloatParam(m_ScreenSpaceShadowsCS, HDShaderIDs._DirectionalLightAngle, m_CurrentSunLightAdditionalLightData.sunLightConeAngle);
cmd.SetComputeIntParam(m_ScreenSpaceShadowsCS, HDShaderIDs._RaytracingSampleIndex, sampleIdx);
cmd.SetComputeIntParam(m_ScreenSpaceShadowsCS, HDShaderIDs._RaytracingNumSamples, m_CurrentSunLightAdditionalLightData.numRayTracingSamples);
// Input Buffer
cmd.SetComputeTextureParam(m_ScreenSpaceShadowsCS, m_RaytracingDirectionalShadowSample, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(m_ScreenSpaceShadowsCS, m_RaytracingDirectionalShadowSample, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
// Output buffer
cmd.SetComputeTextureParam(m_ScreenSpaceShadowsCS, m_RaytracingDirectionalShadowSample, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
// Generate a new direction
cmd.DispatchCompute(m_ScreenSpaceShadowsCS, m_RaytracingDirectionalShadowSample, numTilesX, numTilesY, hdCamera.viewCount);
// Define the shader pass to use for the shadow pass
cmd.SetRayTracingShaderPass(m_ScreenSpaceShadowsRT, "VisibilityDXR");
// Set ray count texture
cmd.SetRayTracingIntParam(m_ScreenSpaceShadowsRT, HDShaderIDs._RayCountEnabled, m_RayTracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRayTracingTextureParam(m_ScreenSpaceShadowsRT, HDShaderIDs._RayCountTexture, m_RayTracingManager.rayCountManager.GetRayCountTexture());
// Input buffers
cmd.SetRayTracingTextureParam(m_ScreenSpaceShadowsRT, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(m_ScreenSpaceShadowsRT, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetRayTracingTextureParam(m_ScreenSpaceShadowsRT, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetRayTracingIntParam(m_ScreenSpaceShadowsRT, HDShaderIDs._RaytracingNumSamples, m_CurrentSunLightAdditionalLightData.numRayTracingSamples);
// Output buffer
cmd.SetRayTracingTextureParam(m_ScreenSpaceShadowsRT, HDShaderIDs._RaytracedDirectionalShadowIntegration, m_ShadowIntermediateBufferRGBA0);
// Evaluate the visibility
cmd.DispatchRays(m_ScreenSpaceShadowsRT, m_RayGenDirectionalShadowSingleName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, (uint)hdCamera.viewCount);
}
// Grab the history buffer for shadows
RTHandle shadowHistoryArray = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedShadow)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedShadow, ShadowHistoryBufferAllocatorFunction, 1);
// Apply the simple denoiser (if required)
if (m_CurrentSunLightAdditionalLightData.filterTracedShadow)
{
// Apply the temporal denoiser
HDTemporalFilter temporalFilter = m_RayTracingManager.GetTemporalFilter();
temporalFilter.DenoiseBuffer(cmd, hdCamera, m_ShadowIntermediateBufferRGBA0, shadowHistoryArray, m_ShadowIntermediateBufferRGBA1, singleChannel: true, slotIndex: m_CurrentSunLightDirectionalLightData.screenSpaceShadowIndex);
// Apply the spatial denoiser
HDSimpleDenoiser simpleDenoiser = m_RayTracingManager.GetSimpleDenoiser();
simpleDenoiser.DenoiseBufferNoHistory(cmd, hdCamera, m_ShadowIntermediateBufferRGBA1, m_ShadowIntermediateBufferRGBA0, m_CurrentSunLightAdditionalLightData.filterSizeTraced, singleChannel: true);
}
cmd.SetComputeTextureParam(m_ScreenSpaceShadowsCS, m_OutputShadowTextureKernel, HDShaderIDs._RaytracedDirectionalShadowIntegration, m_ShadowIntermediateBufferRGBA0);
cmd.SetComputeTextureParam(m_ScreenSpaceShadowsCS, m_OutputShadowTextureKernel, HDShaderIDs._ScreenSpaceShadowsTextureRW, m_ScreenSpaceShadowTextureArray);
cmd.SetComputeIntParam(m_ScreenSpaceShadowsCS, HDShaderIDs._RaytracingShadowSlot, m_CurrentSunLightDirectionalLightData.screenSpaceShadowIndex);
cmd.DispatchCompute(m_ScreenSpaceShadowsCS, m_OutputShadowTextureKernel, numTilesX, numTilesY, hdCamera.viewCount);
}
else
#endif
{
// If it is screen space but not ray traced, then we can rely on the shadow map
CoreUtils.SetRenderTarget(cmd, m_ScreenSpaceShadowTextureArray, depthSlice: m_CurrentSunLightDirectionalLightData.screenSpaceShadowIndex);
HDUtils.DrawFullScreen(cmd, s_ScreenSpaceShadowsMat, m_ScreenSpaceShadowTextureArray);
}
}
}
// 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;
}
// If indirect diffuse is on flag its RAS needUpdate
// 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 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;
}
}
}
DeferredLightingRTParameters PrepareIndirectDiffuseDeferredLightingRTParameters(HDCamera hdCamera, HDRaytracingEnvironment rtEnv)
{
DeferredLightingRTParameters deferredParameters = new DeferredLightingRTParameters();
// Fetch the GI volume component
var settings = VolumeManager.instance.stack.GetComponent <GlobalIllumination>();
// Make sure the binning buffer has the right size
CheckBinningBuffersSize(hdCamera);
// Generic attributes
deferredParameters.rayBinning = false;
deferredParameters.layerMask = rtEnv.indirectDiffuseLayerMask;
deferredParameters.maxRayLength = settings.rayLength.value;
deferredParameters.clampValue = settings.clampValue.value;
deferredParameters.includeSky = true;
deferredParameters.diffuseLightingOnly = true;
deferredParameters.halfResolution = false;
deferredParameters.rtEnv = rtEnv;
// Camera data
deferredParameters.width = hdCamera.actualWidth;
deferredParameters.height = hdCamera.actualHeight;
deferredParameters.fov = hdCamera.camera.fieldOfView;
// Compute buffers
deferredParameters.rayBinResult = m_RayBinResult;
deferredParameters.rayBinSizeResult = m_RayBinSizeResult;
deferredParameters.accelerationStructure = m_RayTracingManager.RequestAccelerationStructure(rtEnv.indirectDiffuseLayerMask);
deferredParameters.lightCluster = m_RayTracingManager.RequestLightCluster(rtEnv.indirectDiffuseLayerMask);
// Shaders
deferredParameters.gBufferRaytracingRT = m_Asset.renderPipelineRayTracingResources.gBufferRaytracingRT;
deferredParameters.deferredRaytracingCS = m_Asset.renderPipelineRayTracingResources.deferredRaytracingCS;
deferredParameters.rayBinningCS = m_Asset.renderPipelineRayTracingResources.rayBinningCS;
return(deferredParameters);
}
public void RenderIndirectDiffuseT1(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, int frameCount)
{
// Fetch the required resources
HDRaytracingEnvironment rtEnvironment = m_RayTracingManager.CurrentEnvironment();
var settings = VolumeManager.instance.stack.GetComponent <GlobalIllumination>();
BlueNoise blueNoise = m_RayTracingManager.GetBlueNoiseManager();
// Fetch all the settings
LightCluster lightClusterSettings = VolumeManager.instance.stack.GetComponent <LightCluster>();
if (settings.deferredMode.value)
{
ComputeShader indirectDiffuseCS = m_Asset.renderPipelineRayTracingResources.indirectDiffuseRaytracingCS;
// Fetch the new sample kernel
int currentKernel = indirectDiffuseCS.FindKernel("RaytracingIndirectDiffuseFullRes");
// Inject the ray-tracing sampling data
blueNoise.BindDitheredRNGData8SPP(cmd);
// Bind all the required textures
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
// Bind all the required scalars
cmd.SetComputeFloatParam(indirectDiffuseCS, HDShaderIDs._RaytracingIntensityClamp, settings.clampValue.value);
// Bind the sampling data
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)m_FrameCount % 8;
cmd.SetComputeIntParam(indirectDiffuseCS, HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Bind the output buffers
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesXHR = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesYHR = (texHeight + (areaTileSize - 1)) / areaTileSize;
// Compute the directions
cmd.DispatchCompute(indirectDiffuseCS, currentKernel, numTilesXHR, numTilesYHR, hdCamera.viewCount);
// Prepare the components for the deferred lighting
DeferredLightingRTParameters deferredParamters = PrepareIndirectDiffuseDeferredLightingRTParameters(hdCamera, rtEnvironment);
DeferredLightingRTResources deferredResources = PrepareDeferredLightingRTResources(m_RaytracingDirectionBuffer, m_IDIntermediateBuffer0);
// Evaluate the deferred lighting
RenderRaytracingDeferredLighting(cmd, deferredParamters, deferredResources);
}
else
{
RayTracingShader indirectDiffuseRT = m_Asset.renderPipelineRayTracingResources.indirectDiffuseRaytracingRT;
BindRayTracedIndirectDiffuseData(cmd, hdCamera, rtEnvironment, indirectDiffuseRT, settings, lightClusterSettings);
// Run the computation
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTING_ONLY", true);
CoreUtils.SetKeyword(cmd, "MULTI_BOUNCE_INDIRECT", false);
// Run the computation
cmd.DispatchRays(indirectDiffuseRT, m_RayGenIndirectDiffuseFullResName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, (uint)hdCamera.viewCount);
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTING_ONLY", false);
}
using (new ProfilingSample(cmd, "Filter Indirect Diffuse", CustomSamplerId.RaytracingFilterIndirectDiffuse.GetSampler()))
{
if (settings.denoise.value)
{
DenoiseIndirectDiffuseBuffer(hdCamera, cmd, settings);
}
}
}
public void RenderIndirectDiffuseT1(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, int frameCount)
{
// Fetch the required resources
HDRaytracingEnvironment rtEnvironment = m_RayTracingManager.CurrentEnvironment();
var settings = VolumeManager.instance.stack.GetComponent <GlobalIllumination>();
BlueNoise blueNoise = m_RayTracingManager.GetBlueNoiseManager();
// Fetch all the settings
LightCluster lightClusterSettings = VolumeManager.instance.stack.GetComponent <LightCluster>();
if (settings.deferredMode.value)
{
ComputeShader indirectDiffuseCS = m_Asset.renderPipelineRayTracingResources.indirectDiffuseRaytracingCS;
// Fetch the new sample kernel
int currentKernel = indirectDiffuseCS.FindKernel("RaytracingIndirectDiffuseFullRes");
// Bind all the required textures
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._OwenScrambledRGTexture, m_Asset.renderPipelineResources.textures.owenScrambledRGBATex);
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._OwenScrambledTexture, m_Asset.renderPipelineResources.textures.owenScrambled256Tex);
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._ScramblingTexture, m_Asset.renderPipelineResources.textures.scramblingTex);
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
// Bind all the required scalars
cmd.SetComputeFloatParam(indirectDiffuseCS, HDShaderIDs._RaytracingIntensityClamp, settings.clampValue.value);
// Bind the sampling data
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)m_FrameCount % 8;
cmd.SetComputeIntParam(indirectDiffuseCS, HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Bind the output buffers
cmd.SetComputeTextureParam(indirectDiffuseCS, currentKernel, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesXHR = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesYHR = (texHeight + (areaTileSize - 1)) / areaTileSize;
// Compute the directions
cmd.DispatchCompute(indirectDiffuseCS, currentKernel, numTilesXHR, numTilesYHR, 1);
// Prepare the components for the deferred lighting
DeferredLightingRTParameters deferredParamters = PrepareIndirectDiffuseDeferredLightingRTParameters(hdCamera, rtEnvironment);
DeferredLightingRTResources deferredResources = PrepareDeferredLightingRTResources(m_RaytracingDirectionBuffer, m_IDIntermediateBuffer0);
// Evaluate the deferred lighting
RenderRaytracingDeferredLighting(cmd, deferredParamters, deferredResources);
}
else
{
RayTracingShader indirectDiffuseRT = m_Asset.renderPipelineRayTracingResources.indirectDiffuseRaytracingRT;
BindRayTracedIndirectDiffuseData(cmd, hdCamera, rtEnvironment, indirectDiffuseRT, settings, lightClusterSettings);
// Set the data for the ray miss
cmd.SetRayTracingTextureParam(indirectDiffuseRT, HDShaderIDs._SkyTexture, m_SkyManager.skyReflection);
// Run the computation
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTING_ONLY", true);
CoreUtils.SetKeyword(cmd, "MULTI_BOUNCE_INDIRECT", false);
// Run the computation
cmd.DispatchRays(indirectDiffuseRT, m_RayGenIndirectDiffuseFullResName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTING_ONLY", false);
}
using (new ProfilingSample(cmd, "Filter Indirect Diffuse", CustomSamplerId.RaytracingFilterIndirectDiffuse.GetSampler()))
{
if (settings.enableFilter.value)
{
// Grab the history buffer
RTHandle indirectDiffuseHistory = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedIndirectDiffuse)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedIndirectDiffuse, IndirectDiffuseHistoryBufferAllocatorFunction, 1);
HDSimpleDenoiser simpleDenoiser = m_RayTracingManager.GetSimpleDenoiser();
simpleDenoiser.DenoiseBuffer(cmd, hdCamera, m_IDIntermediateBuffer0, indirectDiffuseHistory, m_IDIntermediateBuffer1, settings.filterRadius.value, singleChannel: false);
HDUtils.BlitCameraTexture(cmd, m_IDIntermediateBuffer1, m_IDIntermediateBuffer0);
}
}
}
public void RenderAO(HDCamera hdCamera, CommandBuffer cmd, RTHandle outputTexture, ScriptableRenderContext renderContext, int frameCount)
{
// Let's check all the resources
HDRaytracingEnvironment rtEnvironment = m_RaytracingManager.CurrentEnvironment();
BlueNoise blueNoise = m_RaytracingManager.GetBlueNoiseManager();
// Check if the state is valid for evaluating ambient occlusion
bool invalidState = rtEnvironment == null;
// If any of the previous requirements is missing, the effect is not requested or no acceleration structure, set the default one and leave right away
if (invalidState)
{
SetDefaultAmbientOcclusionTexture(cmd);
return;
}
RayTracingShader aoShader = m_PipelineRayTracingResources.aoRaytracing;
var aoSettings = VolumeManager.instance.stack.GetComponent <AmbientOcclusion>();
// Grab the acceleration structure for the target camera
RayTracingAccelerationStructure accelerationStructure = m_RaytracingManager.RequestAccelerationStructure(rtEnvironment.aoLayerMask);
// Define the shader pass to use for the reflection pass
cmd.SetRayTracingShaderPass(aoShader, "VisibilityDXR");
// Set the acceleration structure for the pass
cmd.SetRayTracingAccelerationStructure(aoShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray generation data
cmd.SetRayTracingFloatParams(aoShader, HDShaderIDs._RaytracingRayBias, rtEnvironment.rayBias);
cmd.SetRayTracingFloatParams(aoShader, HDShaderIDs._RaytracingRayMaxLength, aoSettings.rayLength.value);
cmd.SetRayTracingIntParams(aoShader, HDShaderIDs._RaytracingNumSamples, aoSettings.sampleCount.value);
// Set the data for the ray generation
cmd.SetRayTracingTextureParam(aoShader, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(aoShader, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)frameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Inject the ray-tracing sampling data
blueNoise.BindDitheredRNGData8SPP(cmd);
// Value used to scale the ao intensity
cmd.SetRayTracingFloatParam(aoShader, HDShaderIDs._RaytracingAOIntensity, aoSettings.intensity.value);
cmd.SetRayTracingIntParam(aoShader, HDShaderIDs._RayCountEnabled, m_RaytracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRayTracingTextureParam(aoShader, HDShaderIDs._RayCountTexture, m_RaytracingManager.rayCountManager.GetRayCountTexture());
// Set the output textures
cmd.SetRayTracingTextureParam(aoShader, HDShaderIDs._AmbientOcclusionTextureRW, m_AOIntermediateBuffer0);
// Run the computation
cmd.DispatchRays(aoShader, m_RayGenShaderName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, (uint)hdCamera.viewCount);
using (new ProfilingSample(cmd, "Filter Ambient Occlusion", CustomSamplerId.RaytracingAmbientOcclusion.GetSampler()))
{
if (aoSettings.denoise.value)
{
// Grab the history buffer
RTHandle ambientOcclusionHistory = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedAmbientOcclusion)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedAmbientOcclusion, AmbientOcclusionHistoryBufferAllocatorFunction, 1);
// Apply the temporal denoiser
HDTemporalFilter temporalFilter = m_RaytracingManager.GetTemporalFilter();
temporalFilter.DenoiseBuffer(cmd, hdCamera, m_AOIntermediateBuffer0, ambientOcclusionHistory, m_AOIntermediateBuffer1);
// Apply the diffuse denoiser
HDDiffuseDenoiser diffuseDenoiser = m_RaytracingManager.GetDiffuseDenoiser();
diffuseDenoiser.DenoiseBuffer(cmd, hdCamera, m_AOIntermediateBuffer1, outputTexture, aoSettings.denoiserRadius.value);
}
else
{
HDUtils.BlitCameraTexture(cmd, m_AOIntermediateBuffer0, outputTexture);
}
}
// Bind the textures and the params
cmd.SetGlobalTexture(HDShaderIDs._AmbientOcclusionTexture, outputTexture);
cmd.SetGlobalVector(HDShaderIDs._AmbientOcclusionParam, new Vector4(0f, 0f, 0f, VolumeManager.instance.stack.GetComponent <AmbientOcclusion>().directLightingStrength.value));
// TODO: All the push-debug stuff should be centralized somewhere
(RenderPipelineManager.currentPipeline as HDRenderPipeline).PushFullScreenDebugTexture(hdCamera, cmd, outputTexture, FullScreenDebugMode.SSAO);
}
void RenderAreaScreenSpaceShadow(CommandBuffer cmd, HDCamera hdCamera
, HDRaytracingEnvironment rtEnvironment, in LightData lightData, HDAdditionalLightData additionalLightData, int lightIndex
