FRayTracingSceneInitializer2 | Unreal Engine 5.2 Documentation

References


Module	RHI
Header	/Engine/Source/Runtime/RHI/Public/RHIResources.h
Include	#include "RHIResources.h"

struct FRayTracingSceneInitializer2

Type	Name	Description
TArray< uint32 >	BaseInstancePrefixSum	Exclusive prefix sum of `Instance.NumTransforms_ for all instances in this scene. Used to emulate SV_InstanceID in hit shaders.
FName	DebugName
ERayTracingSceneLifetime	Lifetime	Defines whether data in this scene should persist between frames.
uint32	NumCallableShaderSlots	Defines how many different callable shaders with unique resource bindings can be bound to this scene.
uint32	NumMissShaderSlots	At least one miss shader must be present in a ray tracing scene.
TArray< uint32 >	NumNativeInstancesPerLayer	Total flattened number of ray tracing geometry instances (a single FRayTracingGeometryInstance may represent many) per layer.
uint32	NumTotalSegments
TArray< FRHIRayTracingGeometry * >	PerInstanceGeometries	One entry per instance.
TArray< TRefCountPtr< FRHIRayTracingGeometry > >	ReferencedGeometries	Unique list of geometries referenced by all instances in this scene.
TArray< uint32 >	SegmentPrefixSum	Exclusive prefix sum of instance geometry segments is used to calculate SBT record address from instance and segment indices.
uint32	ShaderSlotsPerGeometrySegment	This value controls how many elements will be allocated in the shader binding table per geometry segment.