Diligent::TLASBuildInstanceData struct

#include <Graphics/GraphicsEngine/interface/DeviceContext.h>

Public variables

const char* InstanceName

Instance name that is used to map an instance to a hit group in shader binding table.

IBottomLevelAS* pBLAS

Bottom-level AS that represents instance geometry. Once built, TLAS will hold strong reference to pBLAS until next build or copy operation. Access to the BLAS must be externally synchronized.

InstanceMatrix Transform

Instace to world transformation.

Uint32 CustomId

User-defined value that can be accessed in the shader via InstanceID() in HLSL and gl_InstanceCustomIndex in GLSL. Only the lower 24 bits are used.

RAYTRACING_INSTANCE_FLAGS Flags

Instance flags, see Diligent::RAYTRACING_INSTANCE_FLAGS.

Uint8 Mask

Visibility mask for the geometry, the instance may only be hit if rayMask & instance.Mask != 0. ('rayMask' in GLSL is a 'cullMask' argument of traceRay(), 'rayMask' in HLSL is an 'InstanceInclusionMask' argument of TraceRay()).

Uint32 ContributionToHitGroupIndex

The index used to calculate the hit group location in the shader binding table. Must be TLAS_INSTANCE_OFFSET_AUTO if BuildTLASAttribs::BindingMode is not SHADER_BINDING_USER_DEFINED. Only the lower 24 bits are used.