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 Experimental.Rendering.RayTracingAccelerationStructure();
// We need to define the maximal number of meshes for our geometries
int maxNumSubMeshes = 1;
// 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)
{
Renderer currentRenderer = currentLOD.renderers[rendererIdx];
// Add this fella to the renderer list
subScene.targetRenderers.Add(currentRenderer);
// Also, we need to contribute to the maximal number of sub-meshes
MeshFilter currentFilter = currentRenderer.GetComponent <MeshFilter>();
if (currentFilter != null && currentFilter.sharedMesh != null)
{
maxNumSubMeshes = Mathf.Max(maxNumSubMeshes, currentFilter.sharedMesh.subMeshCount);
}
}
}
}
// 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);
}
}
}
// 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 sub-meshes
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;
// We need to build the instance flag for this renderer
uint instanceFlag = 0x00;
// Incorporate the shadow casting flag
instanceFlag |= ((currentRenderer.shadowCastingMode == ShadowCastingMode.On) ? (uint)(1 << 2) : 0x00);
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)(1 << 1) : (uint)(1 << 0);
// 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.lights = new HDRayTracingLights();
subScene.lights.hdLightArray = new List <HDAdditionalLightData>();
subScene.lights.hdDirectionalLightArray = new List <HDAdditionalLightData>();
// fetch all the 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.lights.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.lights.hdLightArray.AddRange(pointLights);
subScene.lights.hdLightArray.AddRange(lineLights);
subScene.lights.hdLightArray.AddRange(rectLights);
// Fetch all the reflection probes in the scene
subScene.lights.reflectionProbeArray = new List <HDProbe>();
HDAdditionalReflectionData[] reflectionProbeArray = UnityEngine.GameObject.FindObjectsOfType <HDAdditionalReflectionData>();
for (int reflIdx = 0; reflIdx < reflectionProbeArray.Length; ++reflIdx)
{
HDAdditionalReflectionData reflectionProbe = reflectionProbeArray[reflIdx];
// Add it to the list if enabled
if (reflectionProbe.enabled)
{
subScene.lights.reflectionProbeArray.Add(reflectionProbe);
}
}
// Build the light cluster
subScene.lightCluster = new HDRaytracingLightCluster();
subScene.lightCluster.Initialize(m_Resources, m_RTResources, this, m_SharedRTManager, m_RenderPipeline);
// Mark this sub-scene as valid
subScene.valid = true;
}
else
{
subScene.valid = false;
}
}
public void BuildRayTracingAccelerationStructure()
{
// Clear all the per frame-data
m_RayTracingRendererReference.Clear();
m_RayTracingLights.hdDirectionalLightArray.Clear();
m_RayTracingLights.hdPointLightArray.Clear();
m_RayTracingLights.hdLineLightArray.Clear();
m_RayTracingLights.hdRectLightArray.Clear();
m_RayTracingLights.hdLightArray.Clear();
m_RayTracingLights.reflectionProbeArray.Clear();
m_RayTracingLights.lightCount = 0;
m_CurrentRAS.Dispose();
m_CurrentRAS = new RayTracingAccelerationStructure();
m_ValidRayTracingState = false;
m_ValidRayTracingCluster = false;
bool rayTracedShadow = false;
// fetch all the lights in the scene
HDAdditionalLightData[] hdLightArray = UnityEngine.GameObject.FindObjectsOfType <HDAdditionalLightData>();
for (int lightIdx = 0; lightIdx < hdLightArray.Length; ++lightIdx)
{
HDAdditionalLightData hdLight = hdLightArray[lightIdx];
if (hdLight.enabled)
{
// Check if there is a ray traced shadow in the scene
rayTracedShadow |= hdLight.useRayTracedShadows;
if (hdLight.GetComponent <Light>().type == LightType.Directional)
{
m_RayTracingLights.hdDirectionalLightArray.Add(hdLight);
}
else
{
if (hdLight.lightTypeExtent == LightTypeExtent.Punctual)
{
m_RayTracingLights.hdPointLightArray.Add(hdLight);
}
else if (hdLight.lightTypeExtent == LightTypeExtent.Tube)
{
m_RayTracingLights.hdLineLightArray.Add(hdLight);
}
else
{
m_RayTracingLights.hdRectLightArray.Add(hdLight);
}
}
}
}
m_RayTracingLights.hdLightArray.AddRange(m_RayTracingLights.hdPointLightArray);
m_RayTracingLights.hdLightArray.AddRange(m_RayTracingLights.hdLineLightArray);
m_RayTracingLights.hdLightArray.AddRange(m_RayTracingLights.hdRectLightArray);
HDAdditionalReflectionData[] reflectionProbeArray = UnityEngine.GameObject.FindObjectsOfType <HDAdditionalReflectionData>();
for (int reflIdx = 0; reflIdx < reflectionProbeArray.Length; ++reflIdx)
{
HDAdditionalReflectionData reflectionProbe = reflectionProbeArray[reflIdx];
// Add it to the list if enabled
if (reflectionProbe.enabled)
{
m_RayTracingLights.reflectionProbeArray.Add(reflectionProbe);
}
}
m_RayTracingLights.lightCount = m_RayTracingLights.hdPointLightArray.Count
+ m_RayTracingLights.hdLineLightArray.Count
+ m_RayTracingLights.hdRectLightArray.Count
+ m_RayTracingLights.reflectionProbeArray.Count;
AmbientOcclusion aoSettings = VolumeManager.instance.stack.GetComponent <AmbientOcclusion>();
ScreenSpaceReflection reflSettings = VolumeManager.instance.stack.GetComponent <ScreenSpaceReflection>();
GlobalIllumination giSettings = VolumeManager.instance.stack.GetComponent <GlobalIllumination>();
RecursiveRendering recursiveSettings = VolumeManager.instance.stack.GetComponent <RecursiveRendering>();
PathTracing pathTracingSettings = VolumeManager.instance.stack.GetComponent <PathTracing>();
// 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 lod0, we do not have defined way to select the right LOD at the moment
if (lodIdx == 0)
{
for (int rendererIdx = 0; rendererIdx < currentLOD.renderers.Length; ++rendererIdx)
{
// Fetch the renderer that we are interested in
Renderer currentRenderer = currentLOD.renderers[rendererIdx];
// This objects should but included into the RAS
AddInstanceToRAS(currentRenderer,
rayTracedShadow,
aoSettings.rayTracing.value, aoSettings.layerMask.value,
reflSettings.rayTracing.value, reflSettings.layerMask.value,
giSettings.rayTracing.value, giSettings.layerMask.value,
recursiveSettings.enable.value, recursiveSettings.layerMask.value,
pathTracingSettings.enable.value, pathTracingSettings.layerMask.value);
}
}
// Add them to the processed set so that they are not taken into account when processing all the renderers
for (int rendererIdx = 0; rendererIdx < currentLOD.renderers.Length; ++rendererIdx)
{
Renderer currentRenderer = currentLOD.renderers[rendererIdx];
// Add this fella to the renderer list
m_RayTracingRendererReference.Add(currentRenderer.GetInstanceID(), 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, just skip it
if (m_RayTracingRendererReference.ContainsKey(currentRenderer.GetInstanceID()))
{
continue;
}
// Does this object have a reflection probe component? if yes we do not want to have it in the acceleration structure
if (gameObject.TryGetComponent <ReflectionProbe>(out reflectionProbe))
{
continue;
}
// This objects should but included into the RAS
AddInstanceToRAS(currentRenderer,
rayTracedShadow,
aoSettings.rayTracing.value, aoSettings.layerMask.value,
reflSettings.rayTracing.value, reflSettings.layerMask.value,
giSettings.rayTracing.value, giSettings.layerMask.value,
recursiveSettings.enable.value, recursiveSettings.layerMask.value,
pathTracingSettings.enable.value, pathTracingSettings.layerMask.value);
}
// build the acceleration structure
m_CurrentRAS.Build();
// tag the structures as valid
m_ValidRayTracingState = true;
}