public bool RenderIndirectDiffuse(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, int frameCount)
{
// Bind the indirect diffuse texture
BindIndirectDiffuseTexture(cmd);
// First thing to check is: Do we have a valid ray-tracing environment?
HDRaytracingEnvironment rtEnvironment = m_RaytracingManager.CurrentEnvironment();
RayTracingShader indirectDiffuseShader = m_PipelineAsset.renderPipelineRayTracingResources.indirectDiffuseRaytracing;
ComputeShader indirectDiffuseAccumulation = m_PipelineAsset.renderPipelineRayTracingResources.indirectDiffuseAccumulation;
var settings = VolumeManager.instance.stack.GetComponent <GlobalIllumination>();
var lightClusterSettings = VolumeManager.instance.stack.GetComponent <LightCluster>();
bool invalidState = rtEnvironment == null || !settings.enableRayTracing.value ||
indirectDiffuseShader == null || indirectDiffuseAccumulation == null ||
m_PipelineResources.textures.owenScrambledTex == null || m_PipelineResources.textures.scramblingTex == null;
// If no acceleration structure available, end it now
if (invalidState)
{
return(false);
}
// Grab the acceleration structures and the light cluster to use
RayTracingAccelerationStructure accelerationStructure = m_RaytracingManager.RequestAccelerationStructure(rtEnvironment.indirectDiffuseLayerMask);
HDRaytracingLightCluster lightCluster = m_RaytracingManager.RequestLightCluster(rtEnvironment.indirectDiffuseLayerMask);
// Compute the actual resolution that is needed base on the quality
string targetRayGen = m_RayGenIndirectDiffuseName;
// Define the shader pass to use for the indirect diffuse pass
cmd.SetRayTracingShaderPass(indirectDiffuseShader, "IndirectDXR");
// Set the acceleration structure for the pass
cmd.SetRayTracingAccelerationStructure(indirectDiffuseShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._OwenScrambledTexture, m_PipelineResources.textures.owenScrambledTex);
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironment.rayBias);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayMaxLength, settings.rayLength.value);
cmd.SetRayTracingIntParams(indirectDiffuseShader, HDShaderIDs._RaytracingNumSamples, settings.numSamples.value);
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)frameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Set the data for the ray generation
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._IndirectDiffuseTextureRW, m_IndirectDiffuseTexture);
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
// Set the indirect diffuse parameters
cmd.SetRayTracingFloatParams(indirectDiffuseShader, HDShaderIDs._RaytracingIntensityClamp, settings.clampValue.value);
// Set ray count texture
cmd.SetRayTracingIntParam(indirectDiffuseShader, HDShaderIDs._RayCountEnabled, m_RaytracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._RayCountTexture, m_RaytracingManager.rayCountManager.rayCountTexture);
// Compute the pixel spread value
float pixelSpreadAngle = Mathf.Atan(2.0f * Mathf.Tan(hdCamera.camera.fieldOfView * Mathf.PI / 360.0f) / Mathf.Min(hdCamera.actualWidth, hdCamera.actualHeight));
cmd.SetRayTracingFloatParam(indirectDiffuseShader, HDShaderIDs._RaytracingPixelSpreadAngle, pixelSpreadAngle);
// LightLoop data
cmd.SetGlobalBuffer(HDShaderIDs._RaytracingLightCluster, lightCluster.GetCluster());
cmd.SetGlobalBuffer(HDShaderIDs._LightDatasRT, lightCluster.GetLightDatas());
cmd.SetGlobalVector(HDShaderIDs._MinClusterPos, lightCluster.GetMinClusterPos());
cmd.SetGlobalVector(HDShaderIDs._MaxClusterPos, lightCluster.GetMaxClusterPos());
cmd.SetGlobalInt(HDShaderIDs._LightPerCellCount, lightClusterSettings.maxNumLightsPercell.value);
cmd.SetGlobalInt(HDShaderIDs._PunctualLightCountRT, lightCluster.GetPunctualLightCount());
cmd.SetGlobalInt(HDShaderIDs._AreaLightCountRT, lightCluster.GetAreaLightCount());
// Set the data for the ray miss
cmd.SetRayTracingTextureParam(indirectDiffuseShader, HDShaderIDs._SkyTexture, m_SkyManager.skyReflection);
// Compute the actual resolution that is needed base on the quality
int widthResolution = hdCamera.actualWidth;
int heightResolution = hdCamera.actualHeight;
// Run the computation
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTING_ONLY", true);
cmd.DispatchRays(indirectDiffuseShader, targetRayGen, (uint)widthResolution, (uint)heightResolution, 1);
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTING_ONLY", false);
if (settings.enableFilter.value)
{
// Grab the history buffer
RTHandleSystem.RTHandle indirectDiffuseHistory = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedIndirectDiffuse)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedIndirectDiffuse, IndirectDiffuseHistoryBufferAllocatorFunction, 1);
HDSimpleDenoiser simpleDenoiser = m_RaytracingManager.GetSimpleDenoiser();
simpleDenoiser.DenoiseBuffer(cmd, hdCamera, m_IndirectDiffuseTexture, indirectDiffuseHistory, m_DenoiseBuffer0, settings.filterRadius.value, singleChannel: false);
HDUtils.BlitCameraTexture(cmd, m_DenoiseBuffer0, m_IndirectDiffuseTexture);
}
// If we are in deferred mode, we need to make sure to add the indirect diffuse (that we intentionally ignored during the GBuffer pass)
// Note that this discards the texture/object ambient occlusion. But we consider that okay given that the ray traced indirect diffuse
// is a physically correct evaluation of that quantity
if (hdCamera.frameSettings.litShaderMode == LitShaderMode.Deferred)
{
int indirectDiffuseKernel = indirectDiffuseAccumulation.FindKernel("IndirectDiffuseAccumulation");
// Bind the source texture
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, indirectDiffuseKernel, HDShaderIDs._IndirectDiffuseTexture, m_IndirectDiffuseTexture);
// Bind the output texture
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, indirectDiffuseKernel, HDShaderIDs._GBufferTexture[0], m_GBufferManager.GetBuffer(0));
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, indirectDiffuseKernel, HDShaderIDs._GBufferTexture[3], m_GBufferManager.GetBuffer(3));
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesX = (widthResolution + (areaTileSize - 1)) / areaTileSize;
int numTilesY = (heightResolution + (areaTileSize - 1)) / areaTileSize;
// Add the indirect diffuse to the GBuffer
cmd.DispatchCompute(indirectDiffuseAccumulation, indirectDiffuseKernel, numTilesX, numTilesY, 1);
}
(RenderPipelineManager.currentPipeline as HDRenderPipeline).PushFullScreenDebugTexture(hdCamera, cmd, m_IndirectDiffuseTexture, FullScreenDebugMode.IndirectDiffuse);
return(true);
}
public bool RenderIndirectDiffuse(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, uint frameCount)
{
// Bind the indirect diffuse texture
BindIndirectDiffuseTexture(cmd);
// First thing to check is: Do we have a valid ray-tracing environment?
HDRaytracingEnvironment rtEnvironement = m_RaytracingManager.CurrentEnvironment();
RaytracingShader indirectDiffuseShader = m_PipelineAsset.renderPipelineResources.shaders.indirectDiffuseRaytracing;
ComputeShader indirectDiffuseAccumulation = m_PipelineAsset.renderPipelineResources.shaders.indirectDiffuseAccumulation;
bool invalidState = rtEnvironement == null || !rtEnvironement.raytracedIndirectDiffuse ||
indirectDiffuseShader == null || indirectDiffuseAccumulation == null ||
m_PipelineResources.textures.owenScrambledTex == null || m_PipelineResources.textures.scramblingTex == null;
// If no acceleration structure available, end it now
if (!ValidIndirectDiffuseState())
{
return(false);
}
// Grab the acceleration structures and the light cluster to use
RaytracingAccelerationStructure accelerationStructure = m_RaytracingManager.RequestAccelerationStructure(rtEnvironement.indirectDiffuseLayerMask);
HDRaytracingLightCluster lightCluster = m_RaytracingManager.RequestLightCluster(rtEnvironement.indirectDiffuseLayerMask);
// Compute the actual resolution that is needed base on the quality
string targetRayGen = m_RayGenIndirectDiffuseName;
// Define the shader pass to use for the indirect diffuse pass
cmd.SetRaytracingShaderPass(indirectDiffuseShader, "IndirectDXR");
// Set the acceleration structure for the pass
cmd.SetRaytracingAccelerationStructure(indirectDiffuseShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
cmd.SetRaytracingTextureParam(indirectDiffuseShader, targetRayGen, HDShaderIDs._OwenScrambledTexture, m_PipelineResources.textures.owenScrambledTex);
cmd.SetRaytracingTextureParam(indirectDiffuseShader, targetRayGen, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironement.rayBias);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayMaxLength, rtEnvironement.indirectDiffuseRayLength);
cmd.SetRaytracingIntParams(indirectDiffuseShader, HDShaderIDs._RaytracingNumSamples, rtEnvironement.indirectDiffuseNumSamples);
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)frameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Set the data for the ray generation
cmd.SetRaytracingTextureParam(indirectDiffuseShader, targetRayGen, HDShaderIDs._IndirectDiffuseTextureRW, m_IndirectDiffuseTexture);
cmd.SetRaytracingTextureParam(indirectDiffuseShader, targetRayGen, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRaytracingTextureParam(indirectDiffuseShader, targetRayGen, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
// Set the indirect diffuse parameters
cmd.SetRaytracingFloatParams(indirectDiffuseShader, HDShaderIDs._RaytracingIntensityClamp, rtEnvironement.indirectDiffuseClampValue);
// Set ray count tex
cmd.SetRaytracingIntParam(indirectDiffuseShader, HDShaderIDs._RayCountEnabled, m_RaytracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRaytracingTextureParam(indirectDiffuseShader, targetRayGen, HDShaderIDs._RayCountTexture, m_RaytracingManager.rayCountManager.rayCountTexture);
// Compute the pixel spread value
float pixelSpreadAngle = Mathf.Atan(2.0f * Mathf.Tan(hdCamera.camera.fieldOfView * Mathf.PI / 360.0f) / Mathf.Min(hdCamera.actualWidth, hdCamera.actualHeight));
cmd.SetRaytracingFloatParam(indirectDiffuseShader, HDShaderIDs._RaytracingPixelSpreadAngle, pixelSpreadAngle);
// LightLoop data
cmd.SetGlobalBuffer(HDShaderIDs._RaytracingLightCluster, lightCluster.GetCluster());
cmd.SetGlobalBuffer(HDShaderIDs._LightDatasRT, lightCluster.GetLightDatas());
cmd.SetGlobalVector(HDShaderIDs._MinClusterPos, lightCluster.GetMinClusterPos());
cmd.SetGlobalVector(HDShaderIDs._MaxClusterPos, lightCluster.GetMaxClusterPos());
cmd.SetGlobalInt(HDShaderIDs._LightPerCellCount, rtEnvironement.maxNumLightsPercell);
cmd.SetGlobalInt(HDShaderIDs._PunctualLightCountRT, lightCluster.GetPunctualLightCount());
cmd.SetGlobalInt(HDShaderIDs._AreaLightCountRT, lightCluster.GetAreaLightCount());
// Set the data for the ray miss
cmd.SetRaytracingTextureParam(indirectDiffuseShader, m_MissShaderName, HDShaderIDs._SkyTexture, m_SkyManager.skyReflection);
// Compute the actual resolution that is needed base on the quality
int widthResolution = hdCamera.actualWidth;
int heightResolution = hdCamera.actualHeight;
// Run the calculus
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTING_ONLY", true);
cmd.DispatchRays(indirectDiffuseShader, targetRayGen, (uint)widthResolution, (uint)heightResolution, 1);
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTING_ONLY", false);
switch (rtEnvironement.indirectDiffuseFilterMode)
{
case HDRaytracingEnvironment.IndirectDiffuseFilterMode.SpatioTemporal:
{
// Grab the history buffer
RTHandleSystem.RTHandle indirectDiffuseHistory = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedIndirectDiffuse)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedIndirectDiffuse, IndirectDiffuseHistoryBufferAllocatorFunction, 1);
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesX = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesY = (texHeight + (areaTileSize - 1)) / areaTileSize;
int m_KernelFilter = indirectDiffuseAccumulation.FindKernel("RaytracingIndirectDiffuseTAA");
// Compute the combined TAA frame
var historyScale = new Vector2(hdCamera.actualWidth / (float)indirectDiffuseHistory.rt.width, hdCamera.actualHeight / (float)indirectDiffuseHistory.rt.height);
cmd.SetComputeVectorParam(indirectDiffuseAccumulation, HDShaderIDs._ScreenToTargetScaleHistory, historyScale);
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, m_KernelFilter, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, m_KernelFilter, HDShaderIDs._DenoiseInputTexture, m_IndirectDiffuseTexture);
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, m_KernelFilter, HDShaderIDs._DenoiseOutputTextureRW, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, m_KernelFilter, HDShaderIDs._IndirectDiffuseHistorybufferRW, indirectDiffuseHistory);
cmd.DispatchCompute(indirectDiffuseAccumulation, m_KernelFilter, numTilesX, numTilesY, 1);
// Output the new history
HDUtils.BlitCameraTexture(cmd, hdCamera, m_DenoiseBuffer0, indirectDiffuseHistory);
m_KernelFilter = indirectDiffuseAccumulation.FindKernel("IndirectDiffuseFilterH");
// Horizontal pass of the bilateral filter
cmd.SetComputeIntParam(indirectDiffuseAccumulation, HDShaderIDs._RaytracingDenoiseRadius, rtEnvironement.indirectDiffuseFilterRadius);
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, m_KernelFilter, HDShaderIDs._DenoiseInputTexture, indirectDiffuseHistory);
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, m_KernelFilter, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, m_KernelFilter, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, m_KernelFilter, HDShaderIDs._DenoiseOutputTextureRW, m_DenoiseBuffer0);
cmd.DispatchCompute(indirectDiffuseAccumulation, m_KernelFilter, numTilesX, numTilesY, 1);
m_KernelFilter = indirectDiffuseAccumulation.FindKernel("IndirectDiffuseFilterV");
// Horizontal pass of the bilateral filter
cmd.SetComputeIntParam(indirectDiffuseAccumulation, HDShaderIDs._RaytracingDenoiseRadius, rtEnvironement.indirectDiffuseFilterRadius);
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, m_KernelFilter, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, m_KernelFilter, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, m_KernelFilter, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, m_KernelFilter, HDShaderIDs._DenoiseOutputTextureRW, m_IndirectDiffuseTexture);
cmd.DispatchCompute(indirectDiffuseAccumulation, m_KernelFilter, numTilesX, numTilesY, 1);
}
break;
}
// If we are in deferred mode, we need to make sure to add the indirect diffuse (that we intentionally ignored during the gbuffer pass)
// Note that this discards the texture/object ambient occlusion. But we consider that okay given that the raytraced indirect diffuse
// is a physically correct evaluation of that quantity
if (hdCamera.frameSettings.litShaderMode == LitShaderMode.Deferred)
{
int indirectDiffuseKernel = indirectDiffuseAccumulation.FindKernel("IndirectDiffuseAccumulation");
// Bind the source texture
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, indirectDiffuseKernel, HDShaderIDs._IndirectDiffuseTexture, m_IndirectDiffuseTexture);
// Bind the output texture
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, indirectDiffuseKernel, HDShaderIDs._GBufferTexture[0], m_GBufferManager.GetBuffer(0));
cmd.SetComputeTextureParam(indirectDiffuseAccumulation, indirectDiffuseKernel, HDShaderIDs._GBufferTexture[3], m_GBufferManager.GetBuffer(3));
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesX = (widthResolution + (areaTileSize - 1)) / areaTileSize;
int numTilesY = (heightResolution + (areaTileSize - 1)) / areaTileSize;
// Add the indirect diffuse to the gbuffer
cmd.DispatchCompute(indirectDiffuseAccumulation, indirectDiffuseKernel, numTilesX, numTilesY, 1);
}
return(true);
}
public void RenderReflections(HDCamera hdCamera, CommandBuffer cmd, RTHandleSystem.RTHandle outputTexture, ScriptableRenderContext renderContext, uint frameCount)
{
// First thing to check is: Do we have a valid ray-tracing environment?
HDRaytracingEnvironment rtEnvironement = m_RaytracingManager.CurrentEnvironment();
BlueNoise blueNoise = m_RaytracingManager.GetBlueNoiseManager();
ComputeShader bilateralFilter = m_PipelineAsset.renderPipelineResources.shaders.reflectionBilateralFilterCS;
RaytracingShader reflectionShader = m_PipelineAsset.renderPipelineResources.shaders.reflectionRaytracing;
bool missingResources = rtEnvironement == null || blueNoise == null || bilateralFilter == null || reflectionShader == null ||
m_PipelineResources.textures.owenScrambledTex == null || m_PipelineResources.textures.scramblingTex == null;
// Try to grab the acceleration structure and the list of HD lights for the target camera
RaytracingAccelerationStructure accelerationStructure = m_RaytracingManager.RequestAccelerationStructure(hdCamera);
HDRaytracingLightCluster lightCluster = m_RaytracingManager.RequestLightCluster(hdCamera);
// If no acceleration structure available, end it now
if (accelerationStructure == null || lightCluster == null || missingResources)
{
return;
}
// Compute the actual resolution that is needed base on the quality
string targetRayGen = "";
switch (rtEnvironement.reflQualityMode)
{
case HDRaytracingEnvironment.ReflectionsQuality.QuarterRes:
{
targetRayGen = m_RayGenHalfResName;
};
break;
case HDRaytracingEnvironment.ReflectionsQuality.Integration:
{
targetRayGen = m_RayGenIntegrationName;
};
break;
}
// Define the shader pass to use for the reflection pass
cmd.SetRaytracingShaderPass(reflectionShader, "ReflectionDXR");
// Set the acceleration structure for the pass
cmd.SetRaytracingAccelerationStructure(reflectionShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._OwenScrambledTexture, m_PipelineResources.textures.owenScrambledTex);
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
// Global reflection parameters
cmd.SetRaytracingFloatParams(reflectionShader, HDShaderIDs._RaytracingIntensityClamp, rtEnvironement.reflClampValue);
cmd.SetRaytracingFloatParams(reflectionShader, HDShaderIDs._RaytracingReflectionMinSmoothness, rtEnvironement.reflMinSmoothness);
cmd.SetRaytracingFloatParams(reflectionShader, HDShaderIDs._RaytracingReflectionMaxDistance, rtEnvironement.reflBlendDistance);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironement.rayBias);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayMaxLength, rtEnvironement.reflRayLength);
cmd.SetRaytracingIntParams(reflectionShader, HDShaderIDs._RaytracingNumSamples, rtEnvironement.reflNumMaxSamples);
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)frameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Set the data for the ray generation
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._SsrLightingTextureRW, m_LightingTexture);
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._SsrHitPointTexture, m_HitPdfTexture);
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
// Set ray count tex
cmd.SetRaytracingIntParam(reflectionShader, HDShaderIDs._RayCountEnabled, m_RaytracingManager.rayCountManager.rayCountEnabled);
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._RayCountTexture, m_RaytracingManager.rayCountManager.rayCountTex);
// Compute the pixel spread value
float pixelSpreadAngle = Mathf.Atan(2.0f * Mathf.Tan(hdCamera.camera.fieldOfView * Mathf.PI / 360.0f) / Mathf.Min(hdCamera.actualWidth, hdCamera.actualHeight));
cmd.SetRaytracingFloatParam(reflectionShader, HDShaderIDs._RaytracingPixelSpreadAngle, pixelSpreadAngle);
// LightLoop data
cmd.SetGlobalBuffer(HDShaderIDs._RaytracingLightCluster, lightCluster.GetCluster());
cmd.SetGlobalBuffer(HDShaderIDs._LightDatasRT, lightCluster.GetLightDatas());
cmd.SetGlobalVector(HDShaderIDs._MinClusterPos, lightCluster.GetMinClusterPos());
cmd.SetGlobalVector(HDShaderIDs._MaxClusterPos, lightCluster.GetMaxClusterPos());
cmd.SetGlobalInt(HDShaderIDs._LightPerCellCount, rtEnvironement.maxNumLightsPercell);
cmd.SetGlobalInt(HDShaderIDs._PunctualLightCountRT, lightCluster.GetPunctualLightCount());
cmd.SetGlobalInt(HDShaderIDs._AreaLightCountRT, lightCluster.GetAreaLightCount());
// Set the data for the ray miss
cmd.SetRaytracingTextureParam(reflectionShader, m_MissShaderName, HDShaderIDs._SkyTexture, m_SkyManager.skyReflection);
// Compute the actual resolution that is needed base on the quality
uint widthResolution = 1, heightResolution = 1;
switch (rtEnvironement.reflQualityMode)
{
case HDRaytracingEnvironment.ReflectionsQuality.QuarterRes:
{
widthResolution = (uint)hdCamera.actualWidth / 2;
heightResolution = (uint)hdCamera.actualHeight / 2;
};
break;
case HDRaytracingEnvironment.ReflectionsQuality.Integration:
{
widthResolution = (uint)hdCamera.actualWidth;
heightResolution = (uint)hdCamera.actualHeight;
};
break;
}
// Run the calculus
cmd.DispatchRays(reflectionShader, targetRayGen, widthResolution, heightResolution, 1);
using (new ProfilingSample(cmd, "Filter Reflection", CustomSamplerId.RaytracingFilterReflection.GetSampler()))
{
switch (rtEnvironement.reflQualityMode)
{
case HDRaytracingEnvironment.ReflectionsQuality.QuarterRes:
{
// Fetch the right filter to use
int currentKernel = bilateralFilter.FindKernel("RaytracingReflectionFilter");
// Inject all the parameters for the compute
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, HDShaderIDs._SsrLightingTextureRW, m_LightingTexture);
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, HDShaderIDs._SsrHitPointTexture, m_HitPdfTexture);
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, "_NoiseTexture", blueNoise.textureArray16RGB);
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, "_VarianceTexture", m_VarianceBuffer);
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, "_MinColorRangeTexture", m_MinBoundBuffer);
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, "_MaxColorRangeTexture", m_MaxBoundBuffer);
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, "_RaytracingReflectionTexture", outputTexture);
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
cmd.SetComputeIntParam(bilateralFilter, HDShaderIDs._SpatialFilterRadius, rtEnvironement.reflSpatialFilterRadius);
// Texture dimensions
int texWidth = outputTexture.rt.width;
int texHeight = outputTexture.rt.width;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesXHR = (texWidth / 2 + (areaTileSize - 1)) / areaTileSize;
int numTilesYHR = (texHeight / 2 + (areaTileSize - 1)) / areaTileSize;
// Compute the texture
cmd.DispatchCompute(bilateralFilter, currentKernel, numTilesXHR, numTilesYHR, 1);
int numTilesXFR = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesYFR = (texHeight + (areaTileSize - 1)) / areaTileSize;
RTHandleSystem.RTHandle history = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedReflection)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedReflection, ReflectionHistoryBufferAllocatorFunction, 1);
// Fetch the right filter to use
currentKernel = bilateralFilter.FindKernel("TemporalAccumulationFilter");
cmd.SetComputeFloatParam(bilateralFilter, HDShaderIDs._TemporalAccumuationWeight, rtEnvironement.reflTemporalAccumulationWeight);
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, HDShaderIDs._AccumulatedFrameTexture, history);
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, HDShaderIDs._CurrentFrameTexture, outputTexture);
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, "_MinColorRangeTexture", m_MinBoundBuffer);
cmd.SetComputeTextureParam(bilateralFilter, currentKernel, "_MaxColorRangeTexture", m_MaxBoundBuffer);
cmd.DispatchCompute(bilateralFilter, currentKernel, numTilesXFR, numTilesYFR, 1);
}
break;
case HDRaytracingEnvironment.ReflectionsQuality.Integration:
{
HDUtils.BlitCameraTexture(cmd, hdCamera, m_LightingTexture, outputTexture);
}
break;
}
}
}
public void Render(HDCamera hdCamera, CommandBuffer cmd, RTHandleSystem.RTHandle outputTexture, ScriptableRenderContext renderContext, CullingResults cull)
{
// First thing to check is: Do we have a valid ray-tracing environment?
HDRaytracingEnvironment rtEnvironement = m_RaytracingManager.CurrentEnvironment();
BlueNoise blueNoise = m_RaytracingManager.GetBlueNoiseManager();
RaytracingShader forwardShader = m_PipelineAsset.renderPipelineResources.shaders.forwardRaytracing;
Shader raytracingMask = m_PipelineAsset.renderPipelineResources.shaders.raytracingFlagMask;
// Try to grab the acceleration structure and the list of HD lights for the target camera
RaytracingAccelerationStructure accelerationStructure = m_RaytracingManager.RequestAccelerationStructure(hdCamera);
HDRaytracingLightCluster lightCluster = m_RaytracingManager.RequestLightCluster(hdCamera);
bool missingResources = rtEnvironement == null || blueNoise == null || forwardShader == null || raytracingMask == null || accelerationStructure == null ||
lightCluster == null || m_PipelineResources.textures.owenScrambledTex == null || m_PipelineResources.textures.scramblingTex == null;
// If any resource or game-object is missing We stop right away
if (missingResources || !rtEnvironement.raytracedObjects)
{
return;
}
if (m_RaytracingFlagMaterial == null)
{
m_RaytracingFlagMaterial = CoreUtils.CreateEngineMaterial(raytracingMask);
}
// Before going into raytracing, we need to flag which pixels needs to be raytracing
EvaluateRaytracingMask(cull, hdCamera, cmd, renderContext);
// Define the shader pass to use for the reflection pass
cmd.SetRaytracingShaderPass(forwardShader, "ForwardDXR");
// Set the acceleration structure for the pass
cmd.SetRaytracingAccelerationStructure(forwardShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
cmd.SetRaytracingTextureParam(forwardShader, m_RayGenShaderName, HDShaderIDs._OwenScrambledTexture, m_PipelineResources.textures.owenScrambledTex);
cmd.SetRaytracingTextureParam(forwardShader, m_RayGenShaderName, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironement.rayBias);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayMaxLength, rtEnvironement.raytracingRayLength);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingMaxRecursion, rtEnvironement.rayMaxDepth);
// Set the data for the ray generation
cmd.SetRaytracingTextureParam(forwardShader, m_RayGenShaderName, HDShaderIDs._RaytracingFlagMask, m_RaytracingFlagTarget);
cmd.SetRaytracingTextureParam(forwardShader, m_RayGenShaderName, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRaytracingTextureParam(forwardShader, m_RayGenShaderName, HDShaderIDs._CameraColorTextureRW, outputTexture);
// Compute the pixel spread value
float pixelSpreadAngle = Mathf.Atan(2.0f * Mathf.Tan(hdCamera.camera.fieldOfView * Mathf.PI / 360.0f) / Mathf.Min(hdCamera.actualWidth, hdCamera.actualHeight));
cmd.SetRaytracingFloatParam(forwardShader, HDShaderIDs._PixelSpreadAngle, pixelSpreadAngle);
// Set the light cluster data if available
{
// LightLoop data
cmd.SetGlobalBuffer(HDShaderIDs._RaytracingLightCluster, lightCluster.GetCluster());
cmd.SetGlobalBuffer(HDShaderIDs._LightDatasRT, lightCluster.GetLightDatas());
cmd.SetGlobalVector(HDShaderIDs._MinClusterPos, lightCluster.GetMinClusterPos());
cmd.SetGlobalVector(HDShaderIDs._MaxClusterPos, lightCluster.GetMaxClusterPos());
cmd.SetGlobalInt(HDShaderIDs._LightPerCellCount, rtEnvironement.maxNumLightsPercell);
cmd.SetGlobalInt(HDShaderIDs._PunctualLightCountRT, lightCluster.GetPunctualLightCount());
cmd.SetGlobalInt(HDShaderIDs._AreaLightCountRT, lightCluster.GetAreaLightCount());
}
// Set the data for the ray miss
cmd.SetRaytracingTextureParam(forwardShader, m_MissShaderName, HDShaderIDs._SkyTexture, m_SkyManager.skyReflection);
// Run the calculus
cmd.DispatchRays(forwardShader, m_RayGenShaderName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
}
public void RenderReflections(HDCamera hdCamera, CommandBuffer cmd, RTHandleSystem.RTHandle outputTexture, ScriptableRenderContext renderContext, uint frameCount)
{
// First thing to check is: Do we have a valid ray-tracing environment?
HDRaytracingEnvironment rtEnvironement = m_RaytracingManager.CurrentEnvironment();
LightLoop lightLoop = m_RaytracingManager.GetLightLoop();
BlueNoise blueNoise = m_RaytracingManager.GetBlueNoiseManager();
ComputeShader reflectionFilter = m_PipelineAsset.renderPipelineResources.shaders.reflectionBilateralFilterCS;
RaytracingShader reflectionShader = m_PipelineAsset.renderPipelineResources.shaders.reflectionRaytracing;
bool invalidState = rtEnvironement == null || blueNoise == null ||
reflectionFilter == null || reflectionShader == null ||
m_PipelineResources.textures.owenScrambledTex == null || m_PipelineResources.textures.scramblingTex == null;
// If no acceleration structure available, end it now
if (invalidState)
{
return;
}
// Grab the acceleration structures and the light cluster to use
RaytracingAccelerationStructure accelerationStructure = m_RaytracingManager.RequestAccelerationStructure(rtEnvironement.reflLayerMask);
HDRaytracingLightCluster lightCluster = m_RaytracingManager.RequestLightCluster(rtEnvironement.reflLayerMask);
// Compute the actual resolution that is needed base on the quality
string targetRayGen = "";
switch (rtEnvironement.reflQualityMode)
{
case HDRaytracingEnvironment.ReflectionsQuality.QuarterRes:
{
targetRayGen = m_RayGenHalfResName;
};
break;
case HDRaytracingEnvironment.ReflectionsQuality.Integration:
{
targetRayGen = m_RayGenIntegrationName;
};
break;
}
// Define the shader pass to use for the reflection pass
cmd.SetRaytracingShaderPass(reflectionShader, "IndirectDXR");
// Set the acceleration structure for the pass
cmd.SetRaytracingAccelerationStructure(reflectionShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._OwenScrambledTexture, m_PipelineResources.textures.owenScrambledTex);
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
// Global reflection parameters
cmd.SetRaytracingFloatParams(reflectionShader, HDShaderIDs._RaytracingIntensityClamp, rtEnvironement.reflClampValue);
cmd.SetRaytracingFloatParams(reflectionShader, HDShaderIDs._RaytracingReflectionMinSmoothness, rtEnvironement.reflMinSmoothness);
cmd.SetRaytracingFloatParams(reflectionShader, HDShaderIDs._RaytracingReflectionMaxDistance, rtEnvironement.reflBlendDistance);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironement.rayBias);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayMaxLength, rtEnvironement.reflRayLength);
cmd.SetRaytracingIntParams(reflectionShader, HDShaderIDs._RaytracingNumSamples, rtEnvironement.reflNumMaxSamples);
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)frameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Set the data for the ray generation
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._SsrLightingTextureRW, m_LightingTexture);
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._SsrHitPointTexture, m_HitPdfTexture);
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
// Set ray count tex
cmd.SetRaytracingIntParam(reflectionShader, HDShaderIDs._RayCountEnabled, m_RaytracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._RayCountTexture, m_RaytracingManager.rayCountManager.rayCountTexture);
// Compute the pixel spread value
float pixelSpreadAngle = Mathf.Atan(2.0f * Mathf.Tan(hdCamera.camera.fieldOfView * Mathf.PI / 360.0f) / Mathf.Min(hdCamera.actualWidth, hdCamera.actualHeight));
cmd.SetRaytracingFloatParam(reflectionShader, HDShaderIDs._RaytracingPixelSpreadAngle, pixelSpreadAngle);
// LightLoop data
cmd.SetGlobalBuffer(HDShaderIDs._RaytracingLightCluster, lightCluster.GetCluster());
cmd.SetGlobalBuffer(HDShaderIDs._LightDatasRT, lightCluster.GetLightDatas());
cmd.SetGlobalVector(HDShaderIDs._MinClusterPos, lightCluster.GetMinClusterPos());
cmd.SetGlobalVector(HDShaderIDs._MaxClusterPos, lightCluster.GetMaxClusterPos());
cmd.SetGlobalInt(HDShaderIDs._LightPerCellCount, rtEnvironement.maxNumLightsPercell);
cmd.SetGlobalInt(HDShaderIDs._PunctualLightCountRT, lightCluster.GetPunctualLightCount());
cmd.SetGlobalInt(HDShaderIDs._AreaLightCountRT, lightCluster.GetAreaLightCount());
// Note: Just in case, we rebind the directional light data (in case they were not)
cmd.SetGlobalBuffer(HDShaderIDs._DirectionalLightDatas, lightLoop.directionalLightDatas);
cmd.SetGlobalInt(HDShaderIDs._DirectionalLightCount, lightLoop.m_lightList.directionalLights.Count);
// Evaluate the clear coat mask texture based on the lit shader mode
RenderTargetIdentifier clearCoatMaskTexture = hdCamera.frameSettings.litShaderMode == LitShaderMode.Deferred ? m_GbufferManager.GetBuffersRTI()[2] : Texture2D.blackTexture;
cmd.SetRaytracingTextureParam(reflectionShader, targetRayGen, HDShaderIDs._SsrClearCoatMaskTexture, clearCoatMaskTexture);
// Set the data for the ray miss
cmd.SetRaytracingTextureParam(reflectionShader, m_MissShaderName, HDShaderIDs._SkyTexture, m_SkyManager.skyReflection);
// Compute the actual resolution that is needed base on the quality
uint widthResolution = 1, heightResolution = 1;
switch (rtEnvironement.reflQualityMode)
{
case HDRaytracingEnvironment.ReflectionsQuality.QuarterRes:
{
widthResolution = (uint)hdCamera.actualWidth / 2;
heightResolution = (uint)hdCamera.actualHeight / 2;
};
break;
case HDRaytracingEnvironment.ReflectionsQuality.Integration:
{
widthResolution = (uint)hdCamera.actualWidth;
heightResolution = (uint)hdCamera.actualHeight;
};
break;
}
// Force to disable specular lighting
cmd.SetGlobalInt(HDShaderIDs._EnableSpecularLighting, 0);
// Run the calculus
cmd.DispatchRays(reflectionShader, targetRayGen, widthResolution, heightResolution, 1);
// Restore the previous state of specular lighting
cmd.SetGlobalInt(HDShaderIDs._EnableSpecularLighting, hdCamera.frameSettings.IsEnabled(FrameSettingsField.SpecularLighting) ? 1 : 0);
using (new ProfilingSample(cmd, "Filter Reflection", CustomSamplerId.RaytracingFilterReflection.GetSampler()))
{
switch (rtEnvironement.reflQualityMode)
{
case HDRaytracingEnvironment.ReflectionsQuality.QuarterRes:
{
// Fetch the right filter to use
int currentKernel = reflectionFilter.FindKernel("RaytracingReflectionFilter");
// Inject all the parameters for the compute
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._SsrLightingTextureRW, m_LightingTexture);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._SsrHitPointTexture, m_HitPdfTexture);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, "_NoiseTexture", blueNoise.textureArray16RGB);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, "_VarianceTexture", m_VarianceBuffer);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, "_MinColorRangeTexture", m_MinBoundBuffer);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, "_MaxColorRangeTexture", m_MaxBoundBuffer);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, "_RaytracingReflectionTexture", outputTexture);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
cmd.SetComputeIntParam(reflectionFilter, HDShaderIDs._SpatialFilterRadius, rtEnvironement.reflSpatialFilterRadius);
cmd.SetComputeFloatParam(reflectionFilter, HDShaderIDs._RaytracingReflectionMinSmoothness, rtEnvironement.reflMinSmoothness);
// Texture dimensions
int texWidth = outputTexture.rt.width;
int texHeight = outputTexture.rt.height;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesXHR = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesYHR = (texHeight + (areaTileSize - 1)) / areaTileSize;
// Bind the right texture for clear coat support
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._SsrClearCoatMaskTexture, clearCoatMaskTexture);
// Compute the texture
cmd.DispatchCompute(reflectionFilter, currentKernel, numTilesXHR, numTilesYHR, 1);
int numTilesXFR = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesYFR = (texHeight + (areaTileSize - 1)) / areaTileSize;
RTHandleSystem.RTHandle history = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedReflection)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedReflection, ReflectionHistoryBufferAllocatorFunction, 1);
// Fetch the right filter to use
currentKernel = reflectionFilter.FindKernel("TemporalAccumulationFilter");
cmd.SetComputeFloatParam(reflectionFilter, HDShaderIDs._TemporalAccumuationWeight, rtEnvironement.reflTemporalAccumulationWeight);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._AccumulatedFrameTexture, history);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, HDShaderIDs._CurrentFrameTexture, outputTexture);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, "_MinColorRangeTexture", m_MinBoundBuffer);
cmd.SetComputeTextureParam(reflectionFilter, currentKernel, "_MaxColorRangeTexture", m_MaxBoundBuffer);
cmd.DispatchCompute(reflectionFilter, currentKernel, numTilesXFR, numTilesYFR, 1);
}
break;
case HDRaytracingEnvironment.ReflectionsQuality.Integration:
{
switch (rtEnvironement.reflFilterMode)
{
case HDRaytracingEnvironment.ReflectionsFilterMode.SpatioTemporal:
{
// Grab the history buffer
RTHandleSystem.RTHandle reflectionHistory = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedReflection)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedReflection, ReflectionHistoryBufferAllocatorFunction, 1);
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesX = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesY = (texHeight + (areaTileSize - 1)) / areaTileSize;
int m_KernelFilter = reflectionFilter.FindKernel("RaytracingReflectionTAA");
// Compute the combined TAA frame
var historyScale = new Vector2(hdCamera.actualWidth / (float)reflectionHistory.rt.width, hdCamera.actualHeight / (float)reflectionHistory.rt.height);
cmd.SetComputeVectorParam(reflectionFilter, HDShaderIDs._ScreenToTargetScaleHistory, historyScale);
cmd.SetComputeTextureParam(reflectionFilter, m_KernelFilter, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(reflectionFilter, m_KernelFilter, HDShaderIDs._DenoiseInputTexture, m_LightingTexture);
cmd.SetComputeTextureParam(reflectionFilter, m_KernelFilter, HDShaderIDs._DenoiseOutputTextureRW, m_HitPdfTexture);
cmd.SetComputeTextureParam(reflectionFilter, m_KernelFilter, HDShaderIDs._ReflectionHistorybufferRW, reflectionHistory);
cmd.DispatchCompute(reflectionFilter, m_KernelFilter, numTilesX, numTilesY, 1);
// Output the new history
HDUtils.BlitCameraTexture(cmd, hdCamera, m_HitPdfTexture, reflectionHistory);
m_KernelFilter = reflectionFilter.FindKernel("ReflBilateralFilterH");
// Horizontal pass of the bilateral filter
cmd.SetComputeIntParam(reflectionFilter, HDShaderIDs._RaytracingDenoiseRadius, rtEnvironement.reflFilterRadius);
cmd.SetComputeTextureParam(reflectionFilter, m_KernelFilter, HDShaderIDs._DenoiseInputTexture, reflectionHistory);
cmd.SetComputeTextureParam(reflectionFilter, m_KernelFilter, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(reflectionFilter, m_KernelFilter, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(reflectionFilter, m_KernelFilter, HDShaderIDs._DenoiseOutputTextureRW, m_HitPdfTexture);
cmd.DispatchCompute(reflectionFilter, m_KernelFilter, numTilesX, numTilesY, 1);
m_KernelFilter = reflectionFilter.FindKernel("ReflBilateralFilterV");
// Horizontal pass of the bilateral filter
cmd.SetComputeIntParam(reflectionFilter, HDShaderIDs._RaytracingDenoiseRadius, rtEnvironement.reflFilterRadius);
cmd.SetComputeTextureParam(reflectionFilter, m_KernelFilter, HDShaderIDs._DenoiseInputTexture, m_HitPdfTexture);
cmd.SetComputeTextureParam(reflectionFilter, m_KernelFilter, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(reflectionFilter, m_KernelFilter, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(reflectionFilter, m_KernelFilter, HDShaderIDs._DenoiseOutputTextureRW, outputTexture);
cmd.DispatchCompute(reflectionFilter, m_KernelFilter, numTilesX, numTilesY, 1);
}
break;
case HDRaytracingEnvironment.ReflectionsFilterMode.None:
{
HDUtils.BlitCameraTexture(cmd, hdCamera, m_LightingTexture, outputTexture);
}
break;
}
}
break;
}
}
}
public bool RenderIndirectDiffuse(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, uint frameCount)
{
// Bind the indirect diffuse texture
BindIndirectDiffuseTexture(cmd);
// First thing to check is: Do we have a valid ray-tracing environment?
HDRaytracingEnvironment rtEnvironement = m_RaytracingManager.CurrentEnvironment();
RaytracingShader indirectDiffuseShader = m_PipelineAsset.renderPipelineResources.shaders.indirectDiffuseRaytracing;
bool invalidState = rtEnvironement == null || !rtEnvironement.raytracedIndirectDiffuse ||
indirectDiffuseShader == null ||
m_PipelineResources.textures.owenScrambledTex == null || m_PipelineResources.textures.scramblingTex == null;
// If no acceleration structure available, end it now
if (invalidState)
{
return(false);
}
// Grab the acceleration structures and the light cluster to use
RaytracingAccelerationStructure accelerationStructure = m_RaytracingManager.RequestAccelerationStructure(rtEnvironement.indirectDiffuseLayerMask);
HDRaytracingLightCluster lightCluster = m_RaytracingManager.RequestLightCluster(rtEnvironement.indirectDiffuseLayerMask);
// Compute the actual resolution that is needed base on the quality
string targetRayGen = m_RayGenIndirectDiffuseName;
// Define the shader pass to use for the indirect diffuse pass
cmd.SetRaytracingShaderPass(indirectDiffuseShader, "IndirectDXR");
// Set the acceleration structure for the pass
cmd.SetRaytracingAccelerationStructure(indirectDiffuseShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
cmd.SetRaytracingTextureParam(indirectDiffuseShader, targetRayGen, HDShaderIDs._OwenScrambledTexture, m_PipelineResources.textures.owenScrambledTex);
cmd.SetRaytracingTextureParam(indirectDiffuseShader, targetRayGen, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironement.rayBias);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayMaxLength, rtEnvironement.indirectDiffuseRayLength);
cmd.SetRaytracingIntParams(indirectDiffuseShader, HDShaderIDs._RaytracingNumSamples, rtEnvironement.indirectDiffuseNumSamples);
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)frameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Set the data for the ray generation
cmd.SetRaytracingTextureParam(indirectDiffuseShader, targetRayGen, HDShaderIDs._IndirectDiffuseTextureRW, m_IndirectDiffuseTexture);
cmd.SetRaytracingTextureParam(indirectDiffuseShader, targetRayGen, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRaytracingTextureParam(indirectDiffuseShader, targetRayGen, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
// Set the indirect diffuse parameters
cmd.SetRaytracingFloatParams(indirectDiffuseShader, HDShaderIDs._RaytracingIntensityClamp, rtEnvironement.indirectDiffuseClampValue);
// Set ray count tex
cmd.SetRaytracingIntParam(indirectDiffuseShader, HDShaderIDs._RayCountEnabled, m_RaytracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRaytracingTextureParam(indirectDiffuseShader, targetRayGen, HDShaderIDs._RayCountTexture, m_RaytracingManager.rayCountManager.rayCountTexture);
// Compute the pixel spread value
float pixelSpreadAngle = Mathf.Atan(2.0f * Mathf.Tan(hdCamera.camera.fieldOfView * Mathf.PI / 360.0f) / Mathf.Min(hdCamera.actualWidth, hdCamera.actualHeight));
cmd.SetRaytracingFloatParam(indirectDiffuseShader, HDShaderIDs._RaytracingPixelSpreadAngle, pixelSpreadAngle);
// LightLoop data
cmd.SetGlobalBuffer(HDShaderIDs._RaytracingLightCluster, lightCluster.GetCluster());
cmd.SetGlobalBuffer(HDShaderIDs._LightDatasRT, lightCluster.GetLightDatas());
cmd.SetGlobalVector(HDShaderIDs._MinClusterPos, lightCluster.GetMinClusterPos());
cmd.SetGlobalVector(HDShaderIDs._MaxClusterPos, lightCluster.GetMaxClusterPos());
cmd.SetGlobalInt(HDShaderIDs._LightPerCellCount, rtEnvironement.maxNumLightsPercell);
cmd.SetGlobalInt(HDShaderIDs._PunctualLightCountRT, lightCluster.GetPunctualLightCount());
cmd.SetGlobalInt(HDShaderIDs._AreaLightCountRT, lightCluster.GetAreaLightCount());
// Set the data for the ray miss
cmd.SetRaytracingTextureParam(indirectDiffuseShader, m_MissShaderName, HDShaderIDs._SkyTexture, m_SkyManager.skyReflection);
// Compute the actual resolution that is needed base on the quality
uint widthResolution = (uint)hdCamera.actualWidth;
uint heightResolution = (uint)hdCamera.actualHeight;
// Run the calculus
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTNG_ONLY", true);
cmd.DispatchRays(indirectDiffuseShader, targetRayGen, widthResolution, heightResolution, 1);
CoreUtils.SetKeyword(cmd, "DIFFUSE_LIGHTNG_ONLY", false);
return(true);
}
public void Render(HDCamera hdCamera, CommandBuffer cmd, RTHandleSystem.RTHandle outputTexture, ScriptableRenderContext renderContext, CullingResults cull)
{
// First thing to check is: Do we have a valid ray-tracing environment?
HDRaytracingEnvironment rtEnvironement = m_RaytracingManager.CurrentEnvironment();
LightLoop lightLoop = m_RaytracingManager.GetLightLoop();
RaytracingShader forwardShader = m_PipelineAsset.renderPipelineResources.shaders.forwardRaytracing;
Shader raytracingMask = m_PipelineAsset.renderPipelineResources.shaders.raytracingFlagMask;
// Check the validity of the state before computing the effect
bool invalidState = rtEnvironement == null || !rtEnvironement.raytracedObjects ||
forwardShader == null || raytracingMask == null ||
m_PipelineResources.textures.owenScrambledTex == null || m_PipelineResources.textures.scramblingTex == null;
// If any resource or game-object is missing We stop right away
if (invalidState)
{
return;
}
// Grab the acceleration structure and the list of HD lights for the target camera
RaytracingAccelerationStructure accelerationStructure = m_RaytracingManager.RequestAccelerationStructure(rtEnvironement.raytracedLayerMask);
HDRaytracingLightCluster lightCluster = m_RaytracingManager.RequestLightCluster(rtEnvironement.raytracedLayerMask);
if (m_RaytracingFlagMaterial == null)
{
m_RaytracingFlagMaterial = CoreUtils.CreateEngineMaterial(raytracingMask);
}
// Before going into raytracing, we need to flag which pixels needs to be raytracing
EvaluateRaytracingMask(cull, hdCamera, cmd, renderContext);
// Define the shader pass to use for the reflection pass
cmd.SetRaytracingShaderPass(forwardShader, "ForwardDXR");
// Set the acceleration structure for the pass
cmd.SetRaytracingAccelerationStructure(forwardShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
cmd.SetRaytracingTextureParam(forwardShader, m_RayGenShaderName, HDShaderIDs._OwenScrambledTexture, m_PipelineResources.textures.owenScrambledTex);
cmd.SetRaytracingTextureParam(forwardShader, m_RayGenShaderName, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironement.rayBias);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayMaxLength, rtEnvironement.raytracingRayLength);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingMaxRecursion, rtEnvironement.rayMaxDepth);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingCameraNearPlane, hdCamera.camera.nearClipPlane);
// Set the data for the ray generation
cmd.SetRaytracingTextureParam(forwardShader, m_RayGenShaderName, HDShaderIDs._RaytracingFlagMask, m_RaytracingFlagTarget);
cmd.SetRaytracingTextureParam(forwardShader, m_RayGenShaderName, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRaytracingTextureParam(forwardShader, m_RayGenShaderName, HDShaderIDs._CameraColorTextureRW, outputTexture);
// Compute an approximate pixel spread angle value (in radians)
float pixelSpreadAngle = hdCamera.camera.fieldOfView * (Mathf.PI / 180.0f) / Mathf.Min(hdCamera.actualWidth, hdCamera.actualHeight);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingPixelSpreadAngle, pixelSpreadAngle);
// LightLoop data
cmd.SetGlobalBuffer(HDShaderIDs._RaytracingLightCluster, lightCluster.GetCluster());
cmd.SetGlobalBuffer(HDShaderIDs._LightDatasRT, lightCluster.GetLightDatas());
cmd.SetGlobalVector(HDShaderIDs._MinClusterPos, lightCluster.GetMinClusterPos());
cmd.SetGlobalVector(HDShaderIDs._MaxClusterPos, lightCluster.GetMaxClusterPos());
cmd.SetGlobalInt(HDShaderIDs._LightPerCellCount, rtEnvironement.maxNumLightsPercell);
cmd.SetGlobalInt(HDShaderIDs._PunctualLightCountRT, lightCluster.GetPunctualLightCount());
cmd.SetGlobalInt(HDShaderIDs._AreaLightCountRT, lightCluster.GetAreaLightCount());
// Note: Just in case, we rebind the directional light data (in case they were not)
cmd.SetGlobalBuffer(HDShaderIDs._DirectionalLightDatas, lightLoop.directionalLightDatas);
cmd.SetGlobalInt(HDShaderIDs._DirectionalLightCount, lightLoop.m_lightList.directionalLights.Count);
// Set the data for the ray miss
cmd.SetRaytracingTextureParam(forwardShader, m_MissShaderName, HDShaderIDs._SkyTexture, m_SkyManager.skyReflection);
// If this is the right debug mode and we have at least one light, write the first shadow to the denoise texture
HDRenderPipeline hdrp = (RenderPipelineManager.currentPipeline as HDRenderPipeline);
cmd.SetRaytracingTextureParam(forwardShader, m_RayGenShaderName, HDShaderIDs._RaytracingPrimaryDebug, m_DebugRaytracingTexture);
hdrp.PushFullScreenDebugTexture(hdCamera, cmd, m_DebugRaytracingTexture, FullScreenDebugMode.PrimaryVisibility);
// Run the calculus
cmd.DispatchRays(forwardShader, m_RayGenShaderName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
}