// As we have our own default value, we need to initialize the light intensity correctly
public static void InitDefaultHDAdditionalLightData(HDAdditionalLightData lightData)
{
// At first init we need to initialize correctly the default value
lightData.ConvertPhysicalLightIntensityToLightIntensity();
// Special treatment for Unity builtin area light. Change it to our rectangle light
var light = lightData.gameObject.GetComponent <Light>();
if (light.type == LightType.Area)
{
lightData.lightTypeExtent = LightTypeExtent.Rectangle;
}
}
// As we have our own default value, we need to initialize the light intensity correctly
public static void InitDefaultHDAdditionalLightData(HDAdditionalLightData lightData)
{
// At first init we need to initialize correctly the default value
lightData.ConvertPhysicalLightIntensityToLightIntensity();
// Special treatment for Unity builtin area light. Change it to our rectangle light
var light = lightData.gameObject.GetComponent <Light>();
// Sanity check: lightData.lightTypeExtent is init to LightTypeExtent.Punctual (in case for unknow reasons we recreate additional data on an existing line)
if (light.type == LightType.Area && lightData.lightTypeExtent == LightTypeExtent.Punctual)
{
lightData.lightTypeExtent = LightTypeExtent.Rectangle;
light.type = LightType.Point; // Same as in HDLightEditor
}
}
// We do our own hash here because Unity does not provide correct hash for builtin types
// Moreover, we don't want to test every single parameters of the light so we filter them here in this specific function.
int GetSunLightHashCode(Light light)
{
HDAdditionalLightData ald = light.GetComponent <HDAdditionalLightData>();
unchecked
{
// Sun could influence the sky (like for procedural sky). We need to handle this possibility. If sun property change, then we need to update the sky
int hash = 13;
hash = hash * 23 + (light.GetHashCode() * 23 + light.transform.position.GetHashCode()) * 23 + light.transform.rotation.GetHashCode();
hash = hash * 23 + light.color.GetHashCode();
hash = hash * 23 + light.colorTemperature.GetHashCode();
hash = hash * 23 + light.intensity.GetHashCode();
// Note: We don't take into account cookie as it doesn't influence GI
if (ald != null)
{
hash = hash * 23 + ald.lightDimmer.GetHashCode();
}
return(hash);
}
}
public void CopyTo(HDAdditionalLightData data)
{
#pragma warning disable 618
data.directionalIntensity = directionalIntensity;
data.punctualIntensity = punctualIntensity;
data.areaIntensity = areaIntensity;
#pragma warning restore 618
data.enableSpotReflector = enableSpotReflector;
data.luxAtDistance = luxAtDistance;
data.m_InnerSpotPercent = m_InnerSpotPercent;
data.lightDimmer = lightDimmer;
data.volumetricDimmer = volumetricDimmer;
data.lightUnit = lightUnit;
data.fadeDistance = fadeDistance;
data.affectDiffuse = affectDiffuse;
data.affectSpecular = affectSpecular;
data.nonLightmappedOnly = nonLightmappedOnly;
data.lightTypeExtent = lightTypeExtent;
data.spotLightShape = spotLightShape;
data.shapeWidth = shapeWidth;
data.shapeHeight = shapeHeight;
data.aspectRatio = aspectRatio;
data.shapeRadius = shapeRadius;
data.maxSmoothness = maxSmoothness;
data.applyRangeAttenuation = applyRangeAttenuation;
data.useOldInspector = useOldInspector;
data.featuresFoldout = featuresFoldout;
data.showAdditionalSettings = showAdditionalSettings;
data.displayLightIntensity = displayLightIntensity;
data.displayAreaLightEmissiveMesh = displayAreaLightEmissiveMesh;
data.needsIntensityUpdate_1_0 = needsIntensityUpdate_1_0;
#if UNITY_EDITOR
data.timelineWorkaround = timelineWorkaround;
#endif
}
public void RenderLightVolumes(CommandBuffer cmd, HDCamera hdCamera, CullingResults cullResults, LightingDebugSettings lightDebugSettings, RTHandleSystem.RTHandle finalRT)
{
using (new ProfilingSample(cmd, "Display Light Volumes"))
{
// Clear the buffers
HDUtils.SetRenderTarget(cmd, hdCamera, m_ColorAccumulationBuffer, ClearFlag.Color, Color.black);
HDUtils.SetRenderTarget(cmd, hdCamera, m_LightCountBuffer, ClearFlag.Color, Color.black);
HDUtils.SetRenderTarget(cmd, hdCamera, m_DebugLightVolumesTexture, ClearFlag.Color, Color.black);
// Set the render target array
HDUtils.SetRenderTarget(cmd, hdCamera, m_RTIDs, m_DepthBuffer);
// First of all let's do the regions for the light sources (we only support Punctual and Area)
int numLights = cullResults.visibleLights.Length;
for (int lightIdx = 0; lightIdx < numLights; ++lightIdx)
{
// Let's build the light's bounding sphere matrix
Light currentLegacyLight = cullResults.visibleLights[lightIdx].light;
if (currentLegacyLight == null)
{
continue;
}
HDAdditionalLightData currentHDRLight = currentLegacyLight.GetComponent <HDAdditionalLightData>();
if (currentHDRLight == null)
{
continue;
}
Matrix4x4 positionMat = Matrix4x4.Translate(currentLegacyLight.transform.position);
if (currentLegacyLight.type == LightType.Point || currentLegacyLight.type == LightType.Area)
{
m_MaterialProperty.SetVector(_RangeShaderID, new Vector3(currentLegacyLight.range, currentLegacyLight.range, currentLegacyLight.range));
switch (currentHDRLight.lightTypeExtent)
{
case LightTypeExtent.Punctual:
{
m_MaterialProperty.SetColor(_ColorShaderID, new Color(0.0f, 0.5f, 0.0f, 1.0f));
m_MaterialProperty.SetVector(_OffsetShaderID, new Vector3(0, 0, 0));
cmd.DrawMesh(DebugShapes.instance.RequestSphereMesh(), positionMat, m_DebugLightVolumeMaterial, 0, 0, m_MaterialProperty);
}
break;
case LightTypeExtent.Rectangle:
{
m_MaterialProperty.SetColor(_ColorShaderID, new Color(0.0f, 1.0f, 1.0f, 1.0f));
m_MaterialProperty.SetVector(_OffsetShaderID, new Vector3(0, 0, 0));
cmd.DrawMesh(DebugShapes.instance.RequestSphereMesh(), positionMat, m_DebugLightVolumeMaterial, 0, 0, m_MaterialProperty);
}
break;
case LightTypeExtent.Tube:
{
m_MaterialProperty.SetColor(_ColorShaderID, new Color(1.0f, 0.0f, 0.5f, 1.0f));
m_MaterialProperty.SetVector(_OffsetShaderID, new Vector3(0, 0, 0));
cmd.DrawMesh(DebugShapes.instance.RequestSphereMesh(), positionMat, m_DebugLightVolumeMaterial, 0, 0, m_MaterialProperty);
}
break;
default:
break;
}
}
else if (currentLegacyLight.type == LightType.Spot)
{
if (currentHDRLight.spotLightShape == SpotLightShape.Cone)
{
float bottomRadius = Mathf.Tan(currentLegacyLight.spotAngle * Mathf.PI / 360.0f) * currentLegacyLight.range;
m_MaterialProperty.SetColor(_ColorShaderID, new Color(1.0f, 0.5f, 0.0f, 1.0f));
m_MaterialProperty.SetVector(_RangeShaderID, new Vector3(bottomRadius, bottomRadius, currentLegacyLight.range));
m_MaterialProperty.SetVector(_OffsetShaderID, new Vector3(0, 0, 0));
cmd.DrawMesh(DebugShapes.instance.RequestConeMesh(), currentLegacyLight.gameObject.transform.localToWorldMatrix, m_DebugLightVolumeMaterial, 0, 0, m_MaterialProperty);
}
else if (currentHDRLight.spotLightShape == SpotLightShape.Box)
{
m_MaterialProperty.SetColor(_ColorShaderID, new Color(1.0f, 0.5f, 0.0f, 1.0f));
m_MaterialProperty.SetVector(_RangeShaderID, new Vector3(currentHDRLight.shapeWidth, currentHDRLight.shapeHeight, currentLegacyLight.range));
m_MaterialProperty.SetVector(_OffsetShaderID, new Vector3(0, 0, currentLegacyLight.range / 2.0f));
cmd.DrawMesh(DebugShapes.instance.RequestBoxMesh(), currentLegacyLight.gameObject.transform.localToWorldMatrix, m_DebugLightVolumeMaterial, 0, 0, m_MaterialProperty);
}
else if (currentHDRLight.spotLightShape == SpotLightShape.Pyramid)
{
float bottomWidth = Mathf.Tan(currentLegacyLight.spotAngle * Mathf.PI / 360.0f) * currentLegacyLight.range;
m_MaterialProperty.SetColor(_ColorShaderID, new Color(1.0f, 0.5f, 0.0f, 1.0f));
m_MaterialProperty.SetVector(_RangeShaderID, new Vector3(currentHDRLight.aspectRatio * bottomWidth * 2, bottomWidth * 2, currentLegacyLight.range));
m_MaterialProperty.SetVector(_OffsetShaderID, new Vector3(0, 0, 0));
cmd.DrawMesh(DebugShapes.instance.RequestPyramidMesh(), currentLegacyLight.gameObject.transform.localToWorldMatrix, m_DebugLightVolumeMaterial, 0, 0, m_MaterialProperty);
}
}
}
// Now let's do the same but for reflection probes
int numProbes = cullResults.visibleReflectionProbes.Length;
for (int probeIdx = 0; probeIdx < numProbes; ++probeIdx)
{
// Let's build the light's bounding sphere matrix
ReflectionProbe currentLegacyProbe = cullResults.visibleReflectionProbes[probeIdx].reflectionProbe;
HDAdditionalReflectionData currentHDProbe = currentLegacyProbe.GetComponent <HDAdditionalReflectionData>();
if (!currentHDProbe)
{
continue;
}
MaterialPropertyBlock m_MaterialProperty = new MaterialPropertyBlock();
Mesh targetMesh = null;
if (currentHDProbe.influenceVolume.shape == InfluenceShape.Sphere)
{
m_MaterialProperty.SetVector(_RangeShaderID, new Vector3(currentHDProbe.influenceVolume.sphereRadius, currentHDProbe.influenceVolume.sphereRadius, currentHDProbe.influenceVolume.sphereRadius));
targetMesh = DebugShapes.instance.RequestSphereMesh();
}
else
{
m_MaterialProperty.SetVector(_RangeShaderID, new Vector3(currentHDProbe.influenceVolume.boxSize.x, currentHDProbe.influenceVolume.boxSize.y, currentHDProbe.influenceVolume.boxSize.z));
targetMesh = DebugShapes.instance.RequestBoxMesh();
}
m_MaterialProperty.SetColor(_ColorShaderID, new Color(1.0f, 1.0f, 0.0f, 1.0f));
m_MaterialProperty.SetVector(_OffsetShaderID, new Vector3(0, 0, 0));
Matrix4x4 positionMat = Matrix4x4.Translate(currentLegacyProbe.transform.position);
cmd.DrawMesh(targetMesh, positionMat, m_DebugLightVolumeMaterial, 0, 0, m_MaterialProperty);
}
// Define which kernel to use based on the lightloop options
int targetKernel = lightDebugSettings.lightVolumeDebugByCategory == LightLoop.LightVolumeDebug.ColorAndEdge ? m_DebugLightVolumeColorsKernel : m_DebugLightVolumeGradientKernel;
// Set the input params for the compute
cmd.SetComputeTextureParam(m_DebugLightVolumeCompute, targetKernel, _DebugLightCountBufferShaderID, m_LightCountBuffer);
cmd.SetComputeTextureParam(m_DebugLightVolumeCompute, targetKernel, _DebugColorAccumulationBufferShaderID, m_ColorAccumulationBuffer);
cmd.SetComputeTextureParam(m_DebugLightVolumeCompute, targetKernel, _DebugLightVolumesTextureShaderID, m_DebugLightVolumesTexture);
cmd.SetComputeTextureParam(m_DebugLightVolumeCompute, targetKernel, _ColorGradientTextureShaderID, m_ColorGradientTexture);
cmd.SetComputeIntParam(m_DebugLightVolumeCompute, _MaxDebugLightCountShaderID, (int)lightDebugSettings.maxDebugLightCount);
// Texture dimensions
int texWidth = hdCamera.actualWidth; // m_ColorAccumulationBuffer.rt.width;
int texHeight = hdCamera.actualHeight; // m_ColorAccumulationBuffer.rt.width;
// Dispatch the compute
int lightVolumesTileSize = 8;
int numTilesX = (texWidth + (lightVolumesTileSize - 1)) / lightVolumesTileSize;
int numTilesY = (texHeight + (lightVolumesTileSize - 1)) / lightVolumesTileSize;
cmd.DispatchCompute(m_DebugLightVolumeCompute, targetKernel, numTilesX, numTilesY, hdCamera.computePassCount);
// Blit this into the camera target
HDUtils.SetRenderTarget(cmd, hdCamera, finalRT);
m_MaterialProperty.SetTexture(HDShaderIDs._BlitTexture, m_DebugLightVolumesTexture);
cmd.DrawProcedural(Matrix4x4.identity, m_DebugLightVolumeMaterial, 1, MeshTopology.Triangles, 3, 1, m_MaterialProperty);
}
}
public void BuildSubSceneStructure(ref HDRayTracingSubScene subScene)
{
// If there is no render environments, then we should not generate acceleration structure
if (m_Environments.Count > 0)
{
// This structure references all the renderers that are considered to be processed
Dictionary <int, int> rendererReference = new Dictionary <int, int>();
// Destroy the acceleration structure
subScene.targetRenderers = new List <Renderer>();
// Create the acceleration structure
subScene.accelerationStructure = new RaytracingAccelerationStructure();
// First of all let's process all the LOD groups
LODGroup[] lodGroupArray = UnityEngine.GameObject.FindObjectsOfType <LODGroup>();
for (var i = 0; i < lodGroupArray.Length; i++)
{
// Grab the current LOD group
LODGroup lodGroup = lodGroupArray[i];
// Get the set of LODs
LOD[] lodArray = lodGroup.GetLODs();
for (int lodIdx = 0; lodIdx < lodArray.Length; ++lodIdx)
{
LOD currentLOD = lodArray[lodIdx];
// We only want to push to the acceleration structure the first fella
if (lodIdx == 0)
{
for (int rendererIdx = 0; rendererIdx < currentLOD.renderers.Length; ++rendererIdx)
{
// Convert the object's layer to an int
int objectLayerValue = 1 << currentLOD.renderers[rendererIdx].gameObject.layer;
// Is this object in one of the allowed layers ?
if ((objectLayerValue & subScene.mask.value) != 0)
{
// Add this fella to the renderer list
subScene.targetRenderers.Add(currentLOD.renderers[rendererIdx]);
}
}
}
// Add them to the processed set
for (int rendererIdx = 0; rendererIdx < currentLOD.renderers.Length; ++rendererIdx)
{
Renderer currentRenderer = currentLOD.renderers[rendererIdx];
// Add this fella to the renderer list
rendererReference.Add(currentRenderer.GetInstanceID(), 1);
}
}
}
int maxNumSubMeshes = 1;
// Grab all the renderers from the scene
var rendererArray = UnityEngine.GameObject.FindObjectsOfType <Renderer>();
for (var i = 0; i < rendererArray.Length; i++)
{
// Fetch the current renderer
Renderer currentRenderer = rendererArray[i];
// If it is not active skip it
if (currentRenderer.enabled == false)
{
continue;
}
// Grab the current game object
GameObject gameObject = currentRenderer.gameObject;
// Has this object already been processed, jsut skip
if (rendererReference.ContainsKey(currentRenderer.GetInstanceID()))
{
continue;
}
// Does this object have a reflection probe component? if yes we do not want to see it in the raytracing environment
ReflectionProbe targetProbe = gameObject.GetComponent <ReflectionProbe>();
if (targetProbe != null)
{
continue;
}
// Convert the object's layer to an int
int objectLayerValue = 1 << currentRenderer.gameObject.layer;
// Is this object in one of the allowed layers ?
if ((objectLayerValue & subScene.mask.value) != 0)
{
// Add this fella to the renderer list
subScene.targetRenderers.Add(currentRenderer);
}
// Also, we need to contribute to the maximal number of submeshes
MeshFilter currentFilter = currentRenderer.GetComponent <MeshFilter>();
if (currentFilter != null && currentFilter.sharedMesh != null)
{
maxNumSubMeshes = Mathf.Max(maxNumSubMeshes, currentFilter.sharedMesh.subMeshCount);
}
}
bool[] subMeshFlagArray = new bool[maxNumSubMeshes];
bool[] subMeshCutoffArray = new bool[maxNumSubMeshes];
// If any object build the acceleration structure
if (subScene.targetRenderers.Count != 0)
{
// For all the renderers that we need to push in the acceleration structure
for (var i = 0; i < subScene.targetRenderers.Count; i++)
{
// Grab the current renderer
Renderer currentRenderer = subScene.targetRenderers[i];
bool singleSided = false;
if (currentRenderer.sharedMaterials != null)
{
// For every sub-mesh/sub-material let's build the right flags
int numSubMeshes = currentRenderer.sharedMaterials.Length;
uint instanceFlag = 0xff;
for (int meshIdx = 0; meshIdx < numSubMeshes; ++meshIdx)
{
Material currentMaterial = currentRenderer.sharedMaterials[meshIdx];
// The material is transparent if either it has the requested keyword or is in the transparent queue range
if (currentMaterial != null)
{
subMeshFlagArray[meshIdx] = true;
// Is the material transparent?
bool materialIsTransparent = currentMaterial.IsKeywordEnabled("_SURFACE_TYPE_TRANSPARENT") ||
(HDRenderQueue.k_RenderQueue_Transparent.lowerBound <= currentMaterial.renderQueue &&
HDRenderQueue.k_RenderQueue_Transparent.upperBound >= currentMaterial.renderQueue) ||
(HDRenderQueue.k_RenderQueue_AllTransparentRaytracing.lowerBound <= currentMaterial.renderQueue &&
HDRenderQueue.k_RenderQueue_AllTransparentRaytracing.upperBound >= currentMaterial.renderQueue);
// Propagate the right mask
instanceFlag = materialIsTransparent ? (uint)0xf0 : (uint)0x0f;
// Is the material alpha tested?
subMeshCutoffArray[meshIdx] = currentMaterial.IsKeywordEnabled("_ALPHATEST_ON") ||
(HDRenderQueue.k_RenderQueue_OpaqueAlphaTest.lowerBound <= currentMaterial.renderQueue &&
HDRenderQueue.k_RenderQueue_OpaqueAlphaTest.upperBound >= currentMaterial.renderQueue);
// Force it to be non single sided if it has the keyword if there is a reason
bool doubleSided = currentMaterial.doubleSidedGI || currentMaterial.IsKeywordEnabled("_DOUBLESIDED_ON");
singleSided |= !doubleSided;
}
else
{
subMeshFlagArray[meshIdx] = false;
subMeshCutoffArray[meshIdx] = false;
singleSided = true;
}
}
// Add it to the acceleration structure
subScene.accelerationStructure.AddInstance(currentRenderer, subMeshMask: subMeshFlagArray, subMeshTransparencyFlags: subMeshCutoffArray, enableTriangleCulling: singleSided, mask: instanceFlag);
}
}
}
// build the acceleration structure
subScene.accelerationStructure.Build();
// Allocate the array for the lights
subScene.hdLightArray = new List <HDAdditionalLightData>();
subScene.hdDirectionalLightArray = new List <HDAdditionalLightData>();
// fetch all the hdrp lights
HDAdditionalLightData[] hdLightArray = UnityEngine.GameObject.FindObjectsOfType <HDAdditionalLightData>();
// Here an important thing is to make sure that the point lights are first in the list then line then area
List <HDAdditionalLightData> pointLights = new List <HDAdditionalLightData>();
List <HDAdditionalLightData> lineLights = new List <HDAdditionalLightData>();
List <HDAdditionalLightData> rectLights = new List <HDAdditionalLightData>();
for (int lightIdx = 0; lightIdx < hdLightArray.Length; ++lightIdx)
{
HDAdditionalLightData hdLight = hdLightArray[lightIdx];
if (hdLight.enabled)
{
// Convert the object's layer to an int
int lightayerValue = 1 << hdLight.gameObject.layer;
if ((lightayerValue & subScene.mask.value) != 0)
{
if (hdLight.GetComponent <Light>().type == LightType.Directional)
{
subScene.hdDirectionalLightArray.Add(hdLight);
}
else
{
if (hdLight.lightTypeExtent == LightTypeExtent.Punctual)
{
pointLights.Add(hdLight);
}
else if (hdLight.lightTypeExtent == LightTypeExtent.Tube)
{
lineLights.Add(hdLight);
}
else
{
rectLights.Add(hdLight);
}
}
}
}
}
subScene.hdLightArray.AddRange(pointLights);
subScene.hdLightArray.AddRange(lineLights);
subScene.hdLightArray.AddRange(rectLights);
// Build the light cluster
subScene.lightCluster = new HDRaytracingLightCluster();
subScene.lightCluster.Initialize(m_Resources, this, m_SharedRTManager, m_LightLoop);
// Mark this sub-scene as valid
subScene.valid = true;
}
else
{
subScene.valid = false;
}
}
public bool RenderAreaShadows(HDCamera hdCamera, CommandBuffer cmd, ScriptableRenderContext renderContext, int 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 rtEnvironment = m_RaytracingManager.CurrentEnvironment();
RaytracingShader shadowRaytrace = m_PipelineAsset.renderPipelineRayTracingResources.areaShadowsRaytracingRT;
ComputeShader shadowsCompute = m_PipelineAsset.renderPipelineRayTracingResources.areaShadowRaytracingCS;
ComputeShader shadowFilter = m_PipelineAsset.renderPipelineRayTracingResources.areaShadowFilterCS;
// Make sure everything is valid
bool invalidState = rtEnvironment == null ||
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(rtEnvironment.shadowLayerMask);
// Define the shader pass to use for the reflection pass
cmd.SetRaytracingShaderPass(shadowRaytrace, "VisibilityDXR");
// Set the acceleration structure for the pass
cmd.SetRaytracingAccelerationStructure(shadowRaytrace, HDShaderIDs._RaytracingAccelerationStructureName, accelerationStructure);
// Inject the ray-tracing sampling data
cmd.SetGlobalTexture(HDShaderIDs._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);
// Temporal Filtering kernels
int applyTAAKernel = shadowFilter.FindKernel("AreaShadowApplyTAA");
int updateAnalyticHistory = shadowFilter.FindKernel("AreaAnalyticHistoryCopy");
int updateShadowHistory = shadowFilter.FindKernel("AreaShadowHistoryCopy");
// Spatial Filtering kernels
int estimateNoiseKernel = shadowFilter.FindKernel("AreaShadowEstimateNoise");
int firstDenoiseKernel = shadowFilter.FindKernel("AreaShadowDenoiseFirstPass");
int secondDenoiseKernel = shadowFilter.FindKernel("AreaShadowDenoiseSecondPass");
// Texture dimensions
int texWidth = hdCamera.actualWidth;
int texHeight = hdCamera.actualHeight;
// Evaluate the dispatch parameters
int areaTileSize = 8;
int numTilesX = (texWidth + (areaTileSize - 1)) / areaTileSize;
int numTilesY = (texHeight + (areaTileSize - 1)) / areaTileSize;
// Inject the ray generation data
cmd.SetGlobalFloat(HDShaderIDs._RaytracingRayBias, rtEnvironment.rayBias);
int numLights = m_RenderPipeline.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_RenderPipeline.m_lightList.lights[lightIdx].lightType != GPULightType.Rectangle || m_RenderPipeline.m_lightList.lights[lightIdx].rayTracedAreaShadowIndex == -1)
{
continue;
}
LightData currentLight = m_RenderPipeline.m_lightList.lights[lightIdx];
HDAdditionalLightData currentAdditionalLightData = m_RenderPipeline.GetCurrentRayTracedShadow(currentLight.rayTracedAreaShadowIndex);
using (new ProfilingSample(cmd, "Ray Traced Area Shadow", CustomSamplerId.RaytracingShadowIntegration.GetSampler()))
{
// We need to build the world to area light matrix
worldToLocalArea.SetColumn(0, currentLight.right);
worldToLocalArea.SetColumn(1, currentLight.up);
worldToLocalArea.SetColumn(2, currentLight.forward);
// Compensate the relative rendering if active
Vector3 lightPositionWS = currentLight.positionRWS;
if (ShaderConfig.s_CameraRelativeRendering != 0)
{
lightPositionWS += hdCamera.camera.transform.position;
}
worldToLocalArea.SetColumn(3, lightPositionWS);
worldToLocalArea.m33 = 1.0f;
worldToLocalArea = worldToLocalArea.inverse;
// We have noticed from extensive profiling that ray-trace shaders are not as effective for running per-pixel computation. In order to reduce that,
// we do a first prepass that compute the analytic term and probability and generates the first integration sample
if (true)
{
int shadowComputeKernel = shadowsCompute.FindKernel("RaytracingAreaShadowPrepass");
// This pass evaluates the analytic value and the generates and outputs the first sample
cmd.SetComputeBufferParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._LightDatas, m_RenderPipeline.lightDatas);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingTargetAreaLight, lightIdx);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingNumSamples, currentAdditionalLightData.numRayTracingSamples);
cmd.SetComputeMatrixParam(shadowsCompute, HDShaderIDs._RaytracingAreaWorldToLocal, worldToLocalArea);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[0], m_GbufferManager.GetBuffer(0));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[1], m_GbufferManager.GetBuffer(1));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[2], m_GbufferManager.GetBuffer(2));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[3], m_GbufferManager.GetBuffer(3));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._AreaCookieTextures, m_RenderPipeline.areaLightCookieManager.GetTexCache());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedAreaShadowIntegration, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedAreaShadowSample, m_DenoiseBuffer1);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracingDistanceBuffer, m_RaytracingDistanceBuffer);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.DispatchCompute(shadowsCompute, shadowComputeKernel, numTilesX, numTilesY, 1);
// This pass will use the previously generated sample and add it to the integration buffer
cmd.SetRaytracingBufferParam(shadowRaytrace, HDShaderIDs._LightDatas, m_RenderPipeline.lightDatas);
cmd.SetRaytracingTextureParam(shadowRaytrace, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRaytracingTextureParam(shadowRaytrace, HDShaderIDs._RaytracedAreaShadowSample, m_DenoiseBuffer1);
cmd.SetRaytracingTextureParam(shadowRaytrace, HDShaderIDs._RaytracedAreaShadowIntegration, m_DenoiseBuffer0);
cmd.SetRaytracingTextureParam(shadowRaytrace, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetRaytracingTextureParam(shadowRaytrace, HDShaderIDs._RaytracingDistanceBuffer, m_RaytracingDistanceBuffer);
cmd.SetRaytracingTextureParam(shadowRaytrace, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.DispatchRays(shadowRaytrace, m_RayGenShadowSingleName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
// Let's do the following samples (if any)
for (int sampleIndex = 1; sampleIndex < currentAdditionalLightData.numRayTracingSamples; ++sampleIndex)
{
shadowComputeKernel = shadowsCompute.FindKernel("RaytracingAreaShadowNewSample");
// This pass generates a new sample based on the initial pre-pass
cmd.SetComputeBufferParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._LightDatas, m_RenderPipeline.lightDatas);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingTargetAreaLight, lightIdx);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingNumSamples, currentAdditionalLightData.numRayTracingSamples);
cmd.SetComputeIntParam(shadowsCompute, HDShaderIDs._RaytracingSampleIndex, sampleIndex);
cmd.SetComputeMatrixParam(shadowsCompute, HDShaderIDs._RaytracingAreaWorldToLocal, worldToLocalArea);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[0], m_GbufferManager.GetBuffer(0));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[1], m_GbufferManager.GetBuffer(1));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[2], m_GbufferManager.GetBuffer(2));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._GBufferTexture[3], m_GbufferManager.GetBuffer(3));
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._AreaCookieTextures, m_RenderPipeline.areaLightCookieManager.GetTexCache());
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedAreaShadowIntegration, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracedAreaShadowSample, m_DenoiseBuffer1);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._RaytracingDistanceBuffer, m_RaytracingDistanceBuffer);
cmd.SetComputeTextureParam(shadowsCompute, shadowComputeKernel, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.DispatchCompute(shadowsCompute, shadowComputeKernel, numTilesX, numTilesY, 1);
// This pass will use the previously generated sample and add it to the integration buffer
cmd.SetRaytracingBufferParam(shadowRaytrace, HDShaderIDs._LightDatas, m_RenderPipeline.lightDatas);
cmd.SetRaytracingTextureParam(shadowRaytrace, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRaytracingTextureParam(shadowRaytrace, HDShaderIDs._RaytracedAreaShadowSample, m_DenoiseBuffer1);
cmd.SetRaytracingTextureParam(shadowRaytrace, HDShaderIDs._RaytracedAreaShadowIntegration, m_DenoiseBuffer0);
cmd.SetRaytracingTextureParam(shadowRaytrace, HDShaderIDs._RaytracingDirectionBuffer, m_RaytracingDirectionBuffer);
cmd.SetRaytracingTextureParam(shadowRaytrace, HDShaderIDs._RaytracingDistanceBuffer, m_RaytracingDistanceBuffer);
cmd.SetRaytracingTextureParam(shadowRaytrace, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.DispatchRays(shadowRaytrace, m_RayGenShadowSingleName, (uint)hdCamera.actualWidth, (uint)hdCamera.actualHeight, 1);
}
}
else
{
// This pass generates the analytic value and will do the full integration
cmd.SetRaytracingBufferParam(shadowRaytrace, HDShaderIDs._LightDatas, m_RenderPipeline.lightDatas);
cmd.SetRaytracingIntParam(shadowRaytrace, HDShaderIDs._RaytracingTargetAreaLight, lightIdx);
cmd.SetRaytracingIntParam(shadowRaytrace, HDShaderIDs._RaytracingNumSamples, currentAdditionalLightData.numRayTracingSamples);
cmd.SetRaytracingMatrixParam(shadowRaytrace, HDShaderIDs._RaytracingAreaWorldToLocal, worldToLocalArea);
cmd.SetRaytracingTextureParam(shadowRaytrace, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetRaytracingTextureParam(shadowRaytrace, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetRaytracingTextureParam(shadowRaytrace, HDShaderIDs._GBufferTexture[0], m_GbufferManager.GetBuffer(0));
cmd.SetRaytracingTextureParam(shadowRaytrace, HDShaderIDs._GBufferTexture[1], m_GbufferManager.GetBuffer(1));
cmd.SetRaytracingTextureParam(shadowRaytrace, HDShaderIDs._GBufferTexture[2], m_GbufferManager.GetBuffer(2));
cmd.SetRaytracingTextureParam(shadowRaytrace, HDShaderIDs._GBufferTexture[3], m_GbufferManager.GetBuffer(3));
cmd.SetRaytracingIntParam(shadowRaytrace, HDShaderIDs._RayCountEnabled, m_RaytracingManager.rayCountManager.RayCountIsEnabled());
cmd.SetRaytracingTextureParam(shadowRaytrace, HDShaderIDs._RayCountTexture, m_RaytracingManager.rayCountManager.rayCountTexture);
cmd.SetRaytracingTextureParam(shadowRaytrace, HDShaderIDs._AreaCookieTextures, m_RenderPipeline.areaLightCookieManager.GetTexCache());
cmd.SetRaytracingTextureParam(shadowRaytrace, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.SetRaytracingTextureParam(shadowRaytrace, 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, currentAdditionalLightData.filterSizeTraced);
cmd.SetComputeIntParam(shadowFilter, HDShaderIDs._RaytracingShadowSlot, m_RenderPipeline.m_lightList.lights[lightIdx].rayTracedAreaShadowIndex);
// 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._RTHandleScaleHistory, historyScale);
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._AreaShadowHistory, areaShadowHistoryArray);
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._AnalyticHistoryBuffer, areaAnalyticHistoryArray);
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(shadowFilter, applyTAAKernel, HDShaderIDs._DenoiseOutputTextureRW, m_DenoiseBuffer1);
cmd.DispatchCompute(shadowFilter, applyTAAKernel, numTilesX, numTilesY, 1);
// Update the shadow history buffer
cmd.SetComputeTextureParam(shadowFilter, updateAnalyticHistory, HDShaderIDs._AnalyticProbBuffer, m_AnalyticProbBuffer);
cmd.SetComputeTextureParam(shadowFilter, updateAnalyticHistory, HDShaderIDs._AnalyticHistoryBuffer, areaAnalyticHistoryArray);
cmd.DispatchCompute(shadowFilter, updateAnalyticHistory, numTilesX, numTilesY, 1);
// Update the analytic history buffer
cmd.SetComputeTextureParam(shadowFilter, updateShadowHistory, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer1);
cmd.SetComputeTextureParam(shadowFilter, updateShadowHistory, HDShaderIDs._AreaShadowHistoryRW, areaShadowHistoryArray);
cmd.DispatchCompute(shadowFilter, updateShadowHistory, numTilesX, numTilesY, 1);
if (currentAdditionalLightData.filterSizeTraced > 0)
{
// Inject parameters for noise estimation
cmd.SetComputeTextureParam(shadowFilter, estimateNoiseKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowFilter, estimateNoiseKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowFilter, estimateNoiseKernel, HDShaderIDs._ScramblingTexture, m_PipelineResources.textures.scramblingTex);
// Noise estimation pre-pass
cmd.SetComputeTextureParam(shadowFilter, estimateNoiseKernel, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer1);
cmd.SetComputeTextureParam(shadowFilter, estimateNoiseKernel, HDShaderIDs._DenoiseOutputTextureRW, m_DenoiseBuffer0);
cmd.DispatchCompute(shadowFilter, estimateNoiseKernel, numTilesX, numTilesY, 1);
// Reinject parameters for denoising
cmd.SetComputeTextureParam(shadowFilter, firstDenoiseKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowFilter, firstDenoiseKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowFilter, firstDenoiseKernel, HDShaderIDs._AreaShadowTextureRW, m_AreaShadowTextureArray);
// First denoising pass
cmd.SetComputeTextureParam(shadowFilter, firstDenoiseKernel, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer0);
cmd.SetComputeTextureParam(shadowFilter, firstDenoiseKernel, HDShaderIDs._DenoiseOutputTextureRW, m_DenoiseBuffer1);
cmd.DispatchCompute(shadowFilter, firstDenoiseKernel, numTilesX, numTilesY, 1);
}
// Re-inject parameters for denoising
cmd.SetComputeTextureParam(shadowFilter, secondDenoiseKernel, HDShaderIDs._DepthTexture, m_SharedRTManager.GetDepthStencilBuffer());
cmd.SetComputeTextureParam(shadowFilter, secondDenoiseKernel, HDShaderIDs._NormalBufferTexture, m_SharedRTManager.GetNormalBuffer());
cmd.SetComputeTextureParam(shadowFilter, secondDenoiseKernel, HDShaderIDs._AreaShadowTextureRW, m_AreaShadowTextureArray);
// Second (and final) denoising pass
cmd.SetComputeTextureParam(shadowFilter, secondDenoiseKernel, HDShaderIDs._DenoiseInputTexture, m_DenoiseBuffer1);
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);
}
// As we have our own default value, we need to initialize the light intensity correctly
public static void InitDefaultHDAdditionalLightData(HDAdditionalLightData lightData)
{
// At first init we need to initialize correctly the default value
lightData.ConvertPhysicalLightIntensityToLightIntensity();
}
