Struct AccelerationStructureInstance

This data structure is used in GPU memory during the acceleration structure build. This struct definition is useful if generating instance data on the CPU first, then uploading it to the GPU. However, applications are also free to generate instance descriptions directly into GPU memory from compute shaders, following the same layout.

Namespace: Evergine.Common.Graphics.Raytracing
Assembly: Evergine.Common.dll
Syntax
public struct AccelerationStructureInstance

Fields

BottonLevel

The bottom-level acceleration structure that is being instanced.

Declaration
public BottomLevelAS BottonLevel
Field Value
Type Description
BottomLevelAS

Flags

Flags from AccelerationStructureInstanceFlags to be applied to the instance.

Declaration
public AccelerationStructureInstanceFlags Flags
Field Value
Type Description
AccelerationStructureInstanceFlags

InstanceContributionToHitGroupIndex

Per-instance contribution to add into shader table indexing to select the hit group to use. It is the offset of the instance inside the shader-binding-table.

Declaration
public uint InstanceContributionToHitGroupIndex
Field Value
Type Description
uint

InstanceID

An arbitrary 24-bit value that can be accessed via InstanceID() in the shader.

Declaration
public uint InstanceID
Field Value
Type Description
uint

InstanceMask

An 8-bit mask assigned to the instance, used to include or reject groups of instances on a per-ray basis.

Declaration
public byte InstanceMask
Field Value
Type Description
byte

Transform4x4

A 4x4 transformation matrix in row-major layout representing the instance-to-world transformation.

Declaration
public Matrix4x4 Transform4x4
Field Value
Type Description
Matrix4x4

Extension Methods