1. Epic GamesDeveloper
  3. FRayTracingGeometryInstance

FRayTracingGeometryInstance

High level descriptor of one or more instances of a mesh in a ray tracing scene.

API > API/Runtime > API/Runtime/RHI

High level descriptor of one or more instances of a mesh in a ray tracing scene. All instances covered by this descriptor will share shader bindings, but may have different transforms and user data.

   
Name FRayTracingGeometryInstance
Type struct
Header File /Engine/Source/Runtime/RHI/Public/RHIResources.h
Include Path #include "RHIResources.h"

Syntax

struct FRayTracingGeometryInstance

Constructors

Name Remarks Include Path Unreal Specifiers

PRAGMA_DISABLE_DEPRECATION_WARNINGS FRayTracingGeometryInstance ()

   RHIResources.h  
  RHIResources.h  
  RHIResources.h  

Destructors

Name Remarks Include Path Unreal Specifiers

~FRayTracingGeometryInstance()

   RHIResources.h  

Variables

Public

Name Type Remarks Include Path Unreal Specifiers
bApplyLocalBoundsTransform bool Whether local bounds scale and center translation should be applied to the instance transform. RHIResources.h  
BaseInstanceSceneDataOffset int32 Offsets into the scene's instance scene data buffer used to get instance transforms from GPUScene If BaseInstanceSceneDataOffset != -1, instances are assumed to be continuous. RHIResources.h  
bIncrementUserDataPerInstance bool Whether to increment UserData for each instance of this geometry (only applied when using DefaultUserData) RHIResources.h  
DefaultUserData uint32 Each geometry copy can receive a user-provided integer, which can be used to retrieve extra shader parameters or customize appearance. RHIResources.h  
Flags ERayTracingInstanceFlags Flags to control triangle back face culling, whether to allow any-hit shaders, etc. RHIResources.h  
GeometryRHI PRAGMA_ENABLE_DEPRECATION_WARNINGS FRHIRayTracingGeometry *   RHIResources.h  
GPUTransformsSRV FShaderResourceViewRHIRef Optional buffer that stores GPU transforms. Used instead of CPU-side transform data. RHIResources.h  
InstanceContributionToHitGroupIndex int32   RHIResources.h  
InstanceSceneDataOffsets TArrayView< const uint32 >   RHIResources.h  
LayerIndex uint8   RHIResources.h  
Mask uint8 Mask that will be tested against one provided to TraceRay() in shader code. RHIResources.h  
NumTransforms uint32 Conservative number of instances. RHIResources.h  
Transforms TArrayView< const FMatrix > A single physical mesh may be duplicated many times in the scene with different transforms and user data. RHIResources.h  
UserData TArrayView< const uint32 >   RHIResources.h  

Functions

Public

Operators

Name Remarks Include Path Unreal Specifiers
  RHIResources.h  
  RHIResources.h  

Ask questions and help your peers Developer Forums

Write your own tutorials or read those from others Learning Library

On this page