public void InitSSSBuffers(GBufferManager gbufferManager, RenderPipelineSettings settings)
{
// TODO: For MSAA, at least initially, we can only support Jimenez, because we can't create MSAA + UAV render targets.
if (settings.supportForwardOnly)
{
// In case of full forward we must allocate the render target for forward SSS (or reuse one already existing)
// TODO: Provide a way to reuse a render target
m_ColorMRTs[0] = RTHandles.Alloc(Vector2.one, filterMode: FilterMode.Point, colorFormat: RenderTextureFormat.ARGB32, sRGB: true, name: "SSSBuffer");
m_ExternalBuffer[0] = false;
}
else
{
// In case of deferred, we must be in sync with SubsurfaceScattering.hlsl and lit.hlsl files and setup the correct buffers
m_ColorMRTs[0] = gbufferManager.GetBuffer(0); // Note: This buffer must be sRGB (which is the case with Lit.shader)
m_ExternalBuffer[0] = true;
}
if (ShaderConfig.k_UseDisneySSS == 0 || NeedTemporarySubsurfaceBuffer())
{
// Caution: must be same format as m_CameraSssDiffuseLightingBuffer
m_CameraFilteringBuffer = RTHandles.Alloc(Vector2.one, filterMode: FilterMode.Point, colorFormat: RenderTextureFormat.RGB111110Float, sRGB: false, enableRandomWrite: true, enableMSAA: true, name: "SSSCameraFiltering"); // Enable UAV
}
// We use 8x8 tiles in order to match the native GCN HTile as closely as possible.
m_HTile = RTHandles.Alloc(size => new Vector2Int((size.x + 7) / 8, (size.y + 7) / 8), filterMode: FilterMode.Point, colorFormat: RenderTextureFormat.R8, sRGB: false, enableRandomWrite: true, name: "SSSHtile"); // Enable UAV
}
public void InitNormalBuffers(GBufferManager gbufferManager, RenderPipelineSettings settings)
{
if (settings.supportOnlyForward)
{
// In case of full forward we must allocate the render target for normal buffer (or reuse one already existing)
// TODO: Provide a way to reuse a render target
m_ColorMRTs[0] = RTHandles.Alloc(Vector2.one, filterMode: FilterMode.Point, colorFormat: RenderTextureFormat.ARGB32, sRGB: false, name: "NormalBuffer");
m_ExternalBuffer[0] = false;
}
else
{
// In case of deferred, we must be in sync with NormalBuffer.hlsl and lit.hlsl files and setup the correct buffers
m_ColorMRTs[0] = gbufferManager.GetBuffer(1); // Normal + Roughness is GBuffer(1)
m_ExternalBuffer[0] = 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 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 RenderAreaShadows(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, uint frameCount)
{
// NOTE: Here we cannot clear the area shadow texture because it is a texture array. So we need to bind it and make sure no material will try to read it in the shaders
BindShadowTexture(cmd);
// Let's check all the resources and states to see if we should render the effect
HDRaytracingEnvironment rtEnvironement = m_RaytracingManager.CurrentEnvironment();
RaytracingShader shadowRaytrace = m_PipelineAsset.renderPipelineResources.shaders.areaShadowsRaytracingRT;
ComputeShader shadowsCompute = m_PipelineAsset.renderPipelineResources.shaders.areaShadowRaytracingCS;
ComputeShader shadowFilter = m_PipelineAsset.renderPipelineResources.shaders.areaShadowFilterCS;
// Make sure everything is valid
bool invalidState = rtEnvironement == null || rtEnvironement.raytracedShadows == false ||
hdCamera.frameSettings.litShaderMode != LitShaderMode.Deferred ||
shadowRaytrace == null || shadowsCompute == null || shadowFilter == null ||
m_PipelineResources.textures.owenScrambledTex == null || m_PipelineResources.textures.scramblingTex == null;
// If invalid state or ray-tracing acceleration structure, we stop right away
if (invalidState)
{
return(false);
}
// Grab the TAA history buffers (SN/UN and Analytic value)
RTHandleSystem.RTHandle areaShadowHistoryArray = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedAreaShadow)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedAreaShadow, AreaShadowHistoryBufferAllocatorFunction, 1);
RTHandleSystem.RTHandle areaAnalyticHistoryArray = hdCamera.GetCurrentFrameRT((int)HDCameraFrameHistoryType.RaytracedAreaAnalytic)
?? hdCamera.AllocHistoryFrameRT((int)HDCameraFrameHistoryType.RaytracedAreaAnalytic, AreaAnalyticHistoryBufferAllocatorFunction, 1);
// Grab the acceleration structure for the target camera
RaytracingAccelerationStructure accelerationStructure = m_RaytracingManager.RequestAccelerationStructure(rtEnvironement.shadowLayerMask);
// Define the shader pass to use for the reflection pass
cmd.SetRaytracingShaderPass(shadowRaytrace, "VisibilityDXR");
// Set the acceleration structure for the pass
cmd.SetRaytracingAccelerationStructure(shadowRaytrace, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
cmd.SetGlobalTexture(HDShaderIDs._OwenScrambledTexture, m_PipelineResources.textures.owenScrambledTex);
cmd.SetGlobalTexture(HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)frameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Grab the Filtering Kernels
int copyTAAHistoryKernel = shadowFilter.FindKernel("AreaShadowCopyTAAHistory");
int applyTAAKernel = shadowFilter.FindKernel("AreaShadowApplyTAA");
int updateAnalyticHistory = shadowFilter.FindKernel("AreaAnalyticHistoryUpdate");
int estimateNoiseKernel = shadowFilter.FindKernel("AreaShadowEstimateNoise");
int firstDenoiseKernel = shadowFilter.FindKernel("AreaShadowDenoiseFirstPass");
int secondDenoiseKernel = shadowFilter.FindKernel("AreaShadowDenoiseSecondPass");
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesX = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesY = (texHeight + (areaTileSize - 1)) / areaTileSize;
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironement.rayBias);
int numLights = m_LightLoop.m_lightList.lights.Count;
for (int lightIdx = 0; lightIdx < numLights; ++lightIdx)
{
// If this is not a rectangular area light or it won't have shadows, skip it
if (m_LightLoop.m_lightList.lights[lightIdx].lightType != GPULightType.Rectangle || m_LightLoop.m_lightList.lights[lightIdx].rayTracedAreaShadowIndex == -1)
{
continue;
}
using (new ProfilingSample(cmd, "Raytrace Area Shadow", CustomSamplerId.RaytracingShadowIntegration.GetSampler()))
{
LightData currentLight = m_LightLoop.m_lightList.lights[lightIdx];
// We need to build the world to area light matrix
worldToLocalArea.SetColumn(0, currentLight.right);
worldToLocalArea.SetColumn(1, currentLight.up);
worldToLocalArea.SetColumn(2, currentLight.forward);
// Compensate the relative rendering if active
Vector3 lightPositionWS = currentLight.positionRWS;
if (ShaderConfig.s_CameraRelativeRendering != 0)
{
lightPositionWS += hdCamera.camera.transform.position;
}
worldToLocalArea.SetColumn(3, lightPositionWS);
worldToLocalArea.m33 = 1.0f;
worldToLocalArea = worldToLocalArea.inverse;
// We have noticed from extensive profiling that ray-trace shaders are not as effective for running per-pixel computation. In order to reduce that,
// we do a first prepass that compute the analytic term and probability and generates the first integration sample
if (rtEnvironement.splitIntegration)
{
int shadowComputeKernel = shadowsCompute.FindKernel("RaytracingAreaShadowPrepass");
// This pass evaluates the analytic value and the generates and outputs the first sample
cmd.SetComputeBufferParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._LightDatas, m_LightLoop.lightDatas);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingTargetAreaLight, lightIdx);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingNumSamples, rtEnvironement.shadowNumSamples);
cmd.SetComputeMatrixParam(shadowsCompute, HDShaderIDs._RaytracingAreaWorldToLocal, worldToLocalArea);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[0], m_GbufferManager.GetBuffer(0));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[1], m_GbufferManager.GetBuffer(1));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[2], m_GbufferManager.GetBuffer(2));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[3], m_GbufferManager.GetBuffer(3));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._AreaCookieTextures, m_LightLoop.areaLightCookieManager.GetTexCache());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedAreaShadowIntegration, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedAreaShadowSample, m_DenoiseBuffer1);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracingDistanceBuffer, m_RaytracingDistanceBuffer);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.DispatchCompute(shadowsCompute, shadowComputeKernel, numTilesX, numTilesY, 1);
// This pass will use the previously generated sample and add it to the integration buffer
cmd.SetRaytracingBufferParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._LightDatas, m_LightLoop.lightDatas);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._RaytracedAreaShadowSample, m_DenoiseBuffer1);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._RaytracedAreaShadowIntegration, m_DenoiseBuffer0);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._RaytracingDistanceBuffer, m_RaytracingDistanceBuffer);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.DispatchRays(shadowRaytrace, m_RayGenShadowSingleName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
// Let's do the following samples (if any)
for (int sampleIndex = 1; sampleIndex < rtEnvironement.shadowNumSamples; ++sampleIndex)
{
shadowComputeKernel = shadowsCompute.FindKernel("RaytracingAreaShadowNewSample");
// This pass generates a new sample based on the initial pre-pass
cmd.SetComputeBufferParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._LightDatas, m_LightLoop.lightDatas);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingTargetAreaLight, lightIdx);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingNumSamples, rtEnvironement.shadowNumSamples);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingSampleIndex, sampleIndex);
cmd.SetComputeMatrixParam(shadowsCompute, HDShaderIDs._RaytracingAreaWorldToLocal, worldToLocalArea);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[0], m_GbufferManager.GetBuffer(0));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[1], m_GbufferManager.GetBuffer(1));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[2], m_GbufferManager.GetBuffer(2));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[3], m_GbufferManager.GetBuffer(3));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._AreaCookieTextures, m_LightLoop.areaLightCookieManager.GetTexCache());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedAreaShadowIntegration, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedAreaShadowSample, m_DenoiseBuffer1);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracingDistanceBuffer, m_RaytracingDistanceBuffer);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.DispatchCompute(shadowsCompute, shadowComputeKernel, numTilesX, numTilesY, 1);
// This pass will use the previously generated sample and add it to the integration buffer
cmd.SetRaytracingBufferParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._LightDatas, m_LightLoop.lightDatas);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._RaytracedAreaShadowSample, m_DenoiseBuffer1);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._RaytracedAreaShadowIntegration, m_DenoiseBuffer0);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._RaytracingDistanceBuffer, m_RaytracingDistanceBuffer);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShadowSingleName, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.DispatchRays(shadowRaytrace, m_RayGenShadowSingleName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
}
}
else
{
// This pass generates the analytic value and will do the full integration
cmd.SetRaytracingBufferParam(shadowRaytrace, m_RayGenShaderName, HDShaderIDs._LightDatas, m_LightLoop.lightDatas);
cmd.SetRaytracingIntParam(shadowRaytrace, HDShaderIDs._RaytracingTargetAreaLight, lightIdx);
cmd.SetRaytracingIntParam(shadowRaytrace, HDShaderIDs._RaytracingNumSamples, rtEnvironement.shadowNumSamples);
cmd.SetRaytracingMatrixParam(shadowRaytrace, HDShaderIDs._RaytracingAreaWorldToLocal, worldToLocalArea);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShaderName, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShaderName, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShaderName, HDShaderIDs._GBufferTexture[0], m_GbufferManager.GetBuffer(0));
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShaderName, HDShaderIDs._GBufferTexture[1], m_GbufferManager.GetBuffer(1));
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShaderName, HDShaderIDs._GBufferTexture[2], m_GbufferManager.GetBuffer(2));
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShaderName, HDShaderIDs._GBufferTexture[3], m_GbufferManager.GetBuffer(3));
cmd.SetRaytracingIntParam(shadowRaytrace, HDShaderIDs._RayCountEnabled, m_RaytracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShaderName, HDShaderIDs._RayCountTexture, m_RaytracingManager.rayCountManager.rayCountTexture);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShaderName, HDShaderIDs._AreaCookieTextures, m_LightLoop.areaLightCookieManager.GetTexCache());
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShaderName, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.SetRaytracingTextureParam(shadowRaytrace, m_RayGenShaderName, HDShaderIDs._RaytracedAreaShadowIntegration, m_DenoiseBuffer0);
cmd.DispatchRays(shadowRaytrace, m_RayGenShaderName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
}
}
using (new ProfilingSample(cmd, "Combine Area Shadow", CustomSamplerId.RaytracingShadowCombination.GetSampler()))
{
// Global parameters
cmd.SetComputeIntParam(shadowFilter, HDShaderIDs._RaytracingDenoiseRadius, rtEnvironement.shadowFilterRadius);
cmd.SetComputeIntParam(shadowFilter, HDShaderIDs._RaytracingShadowSlot, m_LightLoop.m_lightList.lights[lightIdx].rayTracedAreaShadowIndex);
// Given that we can't read and write into the same buffer, we store the current frame value and the history in the denoisebuffer1
cmd.SetComputeTextureParam(shadowFilter, copyTAAHistoryKernel, HDShaderIDs._AreaShadowHistoryRW, areaShadowHistoryArray);
cmd.SetComputeTextureParam(shadowFilter, copyTAAHistoryKernel, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(shadowFilter, copyTAAHistoryKernel, HDShaderIDs._DenoiseOutputTextureRW, m_DenoiseBuffer1);
cmd.DispatchCompute(shadowFilter, copyTAAHistoryKernel, numTilesX, numTilesY, 1);
// Apply a vectorized temporal filtering pass and store it back in the denoisebuffer0 with the analytic value in the third channel
var historyScale = new Vector2(hdCamera.actualWidth / (float)areaShadowHistoryArray.rt.width, hdCamera.actualHeight / (float)areaShadowHistoryArray.rt.height);
cmd.SetComputeVectorParam(shadowFilter, HDShaderIDs._ScreenToTargetScaleHistory, historyScale);
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._AnalyticHistoryBuffer, areaAnalyticHistoryArray);
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer1);
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._DenoiseOutputTextureRW, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._AreaShadowHistoryRW, areaShadowHistoryArray);
cmd.DispatchCompute(shadowFilter, applyTAAKernel, numTilesX, numTilesY, 1);
// Now that we do not need it anymore, update the anyltic history
cmd.SetComputeTextureParam(shadowFilter, updateAnalyticHistory, HDShaderIDs._AnalyticHistoryBuffer, areaAnalyticHistoryArray);
cmd.SetComputeTextureParam(shadowFilter, updateAnalyticHistory, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.DispatchCompute(shadowFilter, updateAnalyticHistory, numTilesX, numTilesY, 1);
if (rtEnvironement.shadowFilterRadius > 0)
{
// Inject parameters for noise estimation
cmd.SetComputeTextureParam(shadowFilter, estimateNoiseKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowFilter, estimateNoiseKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowFilter, estimateNoiseKernel, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
// Noise estimation pre-pass
cmd.SetComputeTextureParam(shadowFilter, estimateNoiseKernel, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(shadowFilter, estimateNoiseKernel, HDShaderIDs._DenoiseOutputTextureRW, m_DenoiseBuffer1);
cmd.DispatchCompute(shadowFilter, estimateNoiseKernel, numTilesX, numTilesY, 1);
// Reinject parameters for denoising
cmd.SetComputeTextureParam(shadowFilter, firstDenoiseKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowFilter, firstDenoiseKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowFilter, firstDenoiseKernel, HDShaderIDs._AreaShadowTextureRW, m_AreaShadowTextureArray);
// First denoising pass
cmd.SetComputeTextureParam(shadowFilter, firstDenoiseKernel, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer1);
cmd.SetComputeTextureParam(shadowFilter, firstDenoiseKernel, HDShaderIDs._DenoiseOutputTextureRW, m_DenoiseBuffer0);
cmd.DispatchCompute(shadowFilter, firstDenoiseKernel, numTilesX, numTilesY, 1);
}
// Reinject parameters for denoising
cmd.SetComputeTextureParam(shadowFilter, secondDenoiseKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowFilter, secondDenoiseKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowFilter, secondDenoiseKernel, HDShaderIDs._AreaShadowTextureRW, m_AreaShadowTextureArray);
// Second (and final) denoising pass
cmd.SetComputeTextureParam(shadowFilter, secondDenoiseKernel, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer0);
cmd.DispatchCompute(shadowFilter, secondDenoiseKernel, numTilesX, numTilesY, 1);
}
}
// If this is the right debug mode and we have at least one light, write the first shadow to the denoise texture
HDRenderPipeline hdrp = (RenderPipelineManager.currentPipeline as HDRenderPipeline);
if (FullScreenDebugMode.RaytracedAreaShadow == hdrp.m_CurrentDebugDisplaySettings.data.fullScreenDebugMode && numLights > 0)
{
int targetKernel = shadowFilter.FindKernel("WriteShadowTextureDebug");
cmd.SetComputeIntParam(shadowFilter, HDShaderIDs._RaytracingShadowSlot, 0);
cmd.SetComputeTextureParam(shadowFilter, targetKernel, HDShaderIDs._AreaShadowTextureRW, m_AreaShadowTextureArray);
cmd.SetComputeTextureParam(shadowFilter, targetKernel, HDShaderIDs._DenoiseOutputTextureRW, m_DenoiseBuffer0);
cmd.DispatchCompute(shadowFilter, targetKernel, numTilesX, numTilesY, 1);
hdrp.PushFullScreenDebugTexture(hdCamera, cmd, m_DenoiseBuffer0, FullScreenDebugMode.RaytracedAreaShadow);
}
return(true);
}
public bool RenderAreaShadows(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, uint frameCount)
{
// NOTE: Here we cannot clear the area shadow texture because it is a texture array. So we need to bind it and make sure no material will try to read it in the shaders
BindShadowTexture(cmd);
// Let's check all the resources and states to see if we should render the effect
HDRaytracingEnvironment rtEnvironement = m_RaytracingManager.CurrentEnvironment();
RaytracingShader shadowsShader = m_PipelineAsset.renderPipelineResources.shaders.shadowsRaytracing;
ComputeShader bilateralFilter = m_PipelineAsset.renderPipelineResources.shaders.areaBillateralFilterCS;
bool invalidState = rtEnvironement == null || !rtEnvironement.raytracedShadows || hdCamera.frameSettings.litShaderMode != LitShaderMode.Deferred ||
shadowsShader == null || bilateralFilter == null ||
m_PipelineResources.textures.owenScrambledTex == null || m_PipelineResources.textures.scramblingTex == null;
// If invalid state or ray-tracing acceleration structure, we stop right away
if (invalidState)
{
return(false);
}
// Grab the acceleration structure for the target camera
RaytracingAccelerationStructure accelerationStructure = m_RaytracingManager.RequestAccelerationStructure(rtEnvironement.shadowLayerMask);
// Define the shader pass to use for the reflection pass
cmd.SetRaytracingShaderPass(shadowsShader, "VisibilityDXR");
// Set the acceleration structure for the pass
cmd.SetRaytracingAccelerationStructure(shadowsShader, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, HDShaderIDs._OwenScrambledTexture, m_PipelineResources.textures.owenScrambledTex);
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
int frameIndex = hdCamera.IsTAAEnabled() ? hdCamera.taaFrameIndex : (int)frameCount % 8;
cmd.SetGlobalInt(HDShaderIDs._RaytracingFrameIndex, frameIndex);
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironement.rayBias);
int numLights = m_LightLoop.m_lightList.lights.Count;
for (int lightIdx = 0; lightIdx < numLights; ++lightIdx)
{
// If this is not a rectangular area light or it won't have shadows, skip it
if (m_LightLoop.m_lightList.lights[lightIdx].lightType != GPULightType.Rectangle || m_LightLoop.m_lightList.lights[lightIdx].rayTracedAreaShadowIndex == -1)
{
continue;
}
using (new ProfilingSample(cmd, "Raytrace Area Shadow", CustomSamplerId.RaytracingShadowIntegration.GetSampler()))
{
LightData currentLight = m_LightLoop.m_lightList.lights[lightIdx];
// We need to build the world to area light matrix
worldToLocalArea.SetColumn(0, currentLight.right);
worldToLocalArea.SetColumn(1, currentLight.up);
worldToLocalArea.SetColumn(2, currentLight.forward);
// Compensate the relative rendering if active
Vector3 lightPositionWS = currentLight.positionRWS;
if (ShaderConfig.s_CameraRelativeRendering != 0)
{
lightPositionWS += hdCamera.camera.transform.position;
}
worldToLocalArea.SetColumn(3, lightPositionWS);
worldToLocalArea.m33 = 1.0f;
worldToLocalArea = worldToLocalArea.inverse;
// Inject the light data
cmd.SetRaytracingBufferParam(shadowsShader, m_RayGenShaderName, HDShaderIDs._LightDatas, m_LightLoop.lightDatas);
cmd.SetRaytracingIntParam(shadowsShader, HDShaderIDs._RaytracingTargetAreaLight, lightIdx);
cmd.SetRaytracingIntParam(shadowsShader, HDShaderIDs._RaytracingNumSamples, rtEnvironement.shadowNumSamples);
cmd.SetRaytracingMatrixParam(shadowsShader, HDShaderIDs._RaytracingAreaWorldToLocal, worldToLocalArea);
// Set the data for the ray generation
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, HDShaderIDs._GBufferTexture[0], m_GbufferManager.GetBuffer(0));
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, HDShaderIDs._GBufferTexture[1], m_GbufferManager.GetBuffer(1));
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, HDShaderIDs._GBufferTexture[2], m_GbufferManager.GetBuffer(2));
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, HDShaderIDs._GBufferTexture[3], m_GbufferManager.GetBuffer(3));
cmd.SetRaytracingIntParam(shadowsShader, HDShaderIDs._RayCountEnabled, m_RaytracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, HDShaderIDs._RayCountTexture, m_RaytracingManager.rayCountManager.rayCountTexture);
// Set the output textures
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, _SNBuffer, m_SNBuffer);
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, _UNBuffer, m_UNBuffer);
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, _UBuffer, m_UBuffer);
// Bind the area cookie textures to the raytracing shader
cmd.SetRaytracingTextureParam(shadowsShader, m_RayGenShaderName, HDShaderIDs._AreaCookieTextures, m_LightLoop.areaLightCookieManager.GetTexCache());
// Run the shadow evaluation
cmd.DispatchRays(shadowsShader, m_RayGenShaderName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
}
using (new ProfilingSample(cmd, "Combine Area Shadow", CustomSamplerId.RaytracingShadowCombination.GetSampler()))
{
// Fetch the filter kernel
m_KernelFilter = bilateralFilter.FindKernel("AreaBilateralShadow");
// Inject all the parameters for the compute
cmd.SetComputeTextureParam(bilateralFilter, m_KernelFilter, _SNBuffer, m_SNBuffer);
cmd.SetComputeTextureParam(bilateralFilter, m_KernelFilter, _UNBuffer, m_UNBuffer);
cmd.SetComputeTextureParam(bilateralFilter, m_KernelFilter, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(bilateralFilter, m_KernelFilter, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeIntParam(bilateralFilter, _DenoiseRadius, rtEnvironement.shadowFilterRadius);
cmd.SetComputeFloatParam(bilateralFilter, _GaussianSigma, rtEnvironement.shadowFilterSigma);
cmd.SetComputeIntParam(bilateralFilter, HDShaderIDs._RaytracingShadowSlot, m_LightLoop.m_lightList.lights[lightIdx].rayTracedAreaShadowIndex);
// Set the output slot
cmd.SetComputeTextureParam(bilateralFilter, m_KernelFilter, HDShaderIDs._AreaShadowTextureRW, m_AreaShadowTextureArray);
// Texture dimensions
int texWidth = m_AreaShadowTextureArray.rt.width;
int texHeight = m_AreaShadowTextureArray.rt.width;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesX = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesY = (texHeight + (areaTileSize - 1)) / areaTileSize;
// Compute the texture
cmd.DispatchCompute(bilateralFilter, m_KernelFilter, numTilesX, numTilesY, 1);
}
}
return(true);
}
public void RenderRaytracingDeferredLighting(CommandBuffer cmd, HDCamera hdCamera, HDRaytracingEnvironment rtEnvironment,
RTHandle directionBuffer, bool rayBinning, LayerMask layerMask, float maxRayLength, RTHandle outputBuffer, bool disableSpecularLighting = false, bool halfResolution = false)
{
ComputeShader rayBinningCS = m_Asset.renderPipelineRayTracingResources.rayBinningCS;
RayTracingShader gBufferRaytracingRT = m_Asset.renderPipelineRayTracingResources.gBufferRaytracingRT;
ComputeShader deferredRaytracingCS = m_Asset.renderPipelineRayTracingResources.deferredRaytracingCS;
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
if (halfResolution)
{
texWidth /= 2;
texHeight /= 2;
}
// Evaluate the dispatch parameters
int rayTileSize = 16;
int numTilesRayBinX = (texWidth + (rayTileSize - 1)) / rayTileSize;
int numTilesRayBinY = (texHeight + (rayTileSize - 1)) / rayTileSize;
int bufferSizeX = numTilesRayBinX * rayTileSize;
int bufferSizeY = numTilesRayBinY * rayTileSize;
int currentKernel = 0;
if (rayBinning)
{
// We need to go through the ray binning pass (if required)
currentKernel = rayBinningCS.FindKernel(halfResolution? "RayBinningHalf" : "RayBinning");
if (bufferSizeX * bufferSizeY > m_RayBinResult.count)
{
if (m_RayBinResult != null)
{
CoreUtils.SafeRelease(m_RayBinResult);
CoreUtils.SafeRelease(m_RayBinSizeResult);
m_RayBinResult = null;
m_RayBinSizeResult = null;
}
if (bufferSizeX * bufferSizeY > 0)
{
m_RayBinResult = new ComputeBuffer(bufferSizeX * bufferSizeY, sizeof(uint));
m_RayBinSizeResult = new ComputeBuffer(numTilesRayBinX * numTilesRayBinY, sizeof(uint));
}
}
cmd.SetComputeTextureParam(rayBinningCS, currentKernel, HDShaderIDs._RaytracingDirectionBuffer, directionBuffer);
cmd.SetComputeBufferParam(rayBinningCS, currentKernel, HDShaderIDs._RayBinResult, m_RayBinResult);
cmd.SetComputeBufferParam(rayBinningCS, currentKernel, HDShaderIDs._RayBinSizeResult, m_RayBinSizeResult);
cmd.SetComputeIntParam(rayBinningCS, HDShaderIDs._RayBinTileCountX, numTilesRayBinX);
cmd.DispatchCompute(rayBinningCS, currentKernel, numTilesRayBinX, numTilesRayBinY, 1);
}
// Define the shader pass to use for the reflection pass
cmd.SetRayTracingShaderPass(gBufferRaytracingRT, "GBufferDXR");
if (rayBinning)
{
cmd.SetGlobalBuffer(HDShaderIDs._RayBinResult, m_RayBinResult);
cmd.SetGlobalBuffer(HDShaderIDs._RayBinSizeResult, m_RayBinSizeResult);
cmd.SetRayTracingIntParam(gBufferRaytracingRT, HDShaderIDs._RayBinTileCountX, numTilesRayBinX);
}
// Grab the acceleration structures and the light cluster to use
RayTracingAccelerationStructure accelerationStructure = m_RayTracingManager.RequestAccelerationStructure(layerMask);
HDRaytracingLightCluster lightCluster = m_RayTracingManager.RequestLightCluster(layerMask);
// Set the acceleration structure for the pass
cmd.SetRayTracingAccelerationStructure(gBufferRaytracingRT, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Bind the textures required for the ray launching
cmd.SetRayTracingTextureParam(gBufferRaytracingRT, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRayTracingTextureParam(gBufferRaytracingRT, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetRayTracingTextureParam(gBufferRaytracingRT, HDShaderIDs._RaytracingDirectionBuffer, directionBuffer);
// Compute the pixel spread value
float pixelSpreadAngle = hdCamera.camera.fieldOfView * (Mathf.PI / 180.0f) / Mathf.Min(hdCamera.actualWidth, hdCamera.actualHeight);
cmd.SetGlobalFloat(HDShaderIDs._RaytracingPixelSpreadAngle, pixelSpreadAngle);
// Additional ray launch values
cmd.SetRayTracingFloatParams(gBufferRaytracingRT, HDShaderIDs._RaytracingRayBias, rtEnvironment.rayBias);
cmd.SetRayTracingFloatParams(gBufferRaytracingRT, HDShaderIDs._RaytracingRayMaxLength, maxRayLength);
// Bind the output textures
cmd.SetRayTracingTextureParam(gBufferRaytracingRT, HDShaderIDs._GBufferTextureRW[0], m_RaytracingGBufferManager.GetBuffer(0));
cmd.SetRayTracingTextureParam(gBufferRaytracingRT, HDShaderIDs._GBufferTextureRW[1], m_RaytracingGBufferManager.GetBuffer(1));
cmd.SetRayTracingTextureParam(gBufferRaytracingRT, HDShaderIDs._GBufferTextureRW[2], m_RaytracingGBufferManager.GetBuffer(2));
cmd.SetRayTracingTextureParam(gBufferRaytracingRT, HDShaderIDs._GBufferTextureRW[3], m_RaytracingGBufferManager.GetBuffer(3));
// cmd.SetRaytracingTextureParam(gBufferRaytracingRT, rayGenGBuffer, HDShaderIDs._GBufferTextureRW[4], m_LocalGBufferManager.GetBuffer(4));
// cmd.SetRaytracingTextureParam(gBufferRaytracingRT, rayGenGBuffer, HDShaderIDs._GBufferTextureRW[5], m_LocalGBufferManager.GetBuffer(5));
cmd.SetRayTracingTextureParam(gBufferRaytracingRT, HDShaderIDs._RaytracingDistanceBuffer, m_RaytracingDistanceBuffer);
// Compute the actual resolution that is needed base on the quality
uint widthResolution = (uint)hdCamera.actualWidth;
uint heightResolution = (uint)hdCamera.actualHeight;
if (disableSpecularLighting)
{
cmd.SetGlobalInt(HDShaderIDs._EnableSpecularLighting, 0);
}
if (rayBinning)
{
cmd.DispatchRays(gBufferRaytracingRT, m_RayGenGBufferBinned, (uint)bufferSizeX, (uint)bufferSizeY, 1);
}
else
{
cmd.SetRayTracingIntParams(gBufferRaytracingRT, "_RaytracingHalfResolution", halfResolution? 1 : 0);
cmd.DispatchRays(gBufferRaytracingRT, m_RayGenGBuffer, widthResolution, heightResolution, 1);
}
// Now let's do the deferred shading pass on the samples
currentKernel = deferredRaytracingCS.FindKernel(halfResolution ? "RaytracingDeferredHalf" : "RaytracingDeferred");
LightCluster lightClusterSettings = VolumeManager.instance.stack.GetComponent <LightCluster>();
cmd.SetComputeBufferParam(deferredRaytracingCS, currentKernel, HDShaderIDs._RaytracingLightCluster, lightCluster.GetCluster());
cmd.SetComputeBufferParam(deferredRaytracingCS, currentKernel, HDShaderIDs._LightDatasRT, lightCluster.GetLightDatas());
cmd.SetComputeVectorParam(deferredRaytracingCS, HDShaderIDs._MinClusterPos, lightCluster.GetMinClusterPos());
cmd.SetComputeVectorParam(deferredRaytracingCS, HDShaderIDs._MaxClusterPos, lightCluster.GetMaxClusterPos());
cmd.SetComputeIntParam(deferredRaytracingCS, HDShaderIDs._LightPerCellCount, lightClusterSettings.maxNumLightsPercell.value);
cmd.SetComputeIntParam(deferredRaytracingCS, HDShaderIDs._PunctualLightCountRT, lightCluster.GetPunctualLightCount());
cmd.SetComputeIntParam(deferredRaytracingCS, HDShaderIDs._AreaLightCountRT, lightCluster.GetAreaLightCount());
cmd.SetComputeTextureParam(deferredRaytracingCS, currentKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(deferredRaytracingCS, currentKernel, HDShaderIDs._RaytracingDirectionBuffer, directionBuffer);
cmd.SetComputeTextureParam(deferredRaytracingCS, currentKernel, HDShaderIDs._RaytracingDistanceBuffer, m_RaytracingDistanceBuffer);
cmd.SetComputeTextureParam(deferredRaytracingCS, currentKernel, HDShaderIDs._GBufferTexture[0], m_RaytracingGBufferManager.GetBuffer(0));
cmd.SetComputeTextureParam(deferredRaytracingCS, currentKernel, HDShaderIDs._GBufferTexture[1], m_RaytracingGBufferManager.GetBuffer(1));
cmd.SetComputeTextureParam(deferredRaytracingCS, currentKernel, HDShaderIDs._GBufferTexture[2], m_RaytracingGBufferManager.GetBuffer(2));
cmd.SetComputeTextureParam(deferredRaytracingCS, currentKernel, HDShaderIDs._GBufferTexture[3], m_RaytracingGBufferManager.GetBuffer(3));
cmd.SetComputeTextureParam(deferredRaytracingCS, currentKernel, HDShaderIDs._LightLayersTexture, TextureXR.GetWhiteTexture());
cmd.SetComputeTextureParam(deferredRaytracingCS, currentKernel, HDShaderIDs._RaytracingLitBufferRW, outputBuffer);
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesXHR = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesYHR = (texHeight + (areaTileSize - 1)) / areaTileSize;
// Compute the texture
cmd.DispatchCompute(deferredRaytracingCS, currentKernel, numTilesXHR, numTilesYHR, 1);
if (disableSpecularLighting)
{
cmd.SetGlobalInt(HDShaderIDs._EnableSpecularLighting, hdCamera.frameSettings.IsEnabled(FrameSettingsField.SpecularLighting) ? 1 : 0);
}
}