---
title: MTL4AccelerationStructureGeometryDescriptor
framework: metal
role: symbol
role_heading: Class
path: metal/mtl4accelerationstructuregeometrydescriptor
---

# MTL4AccelerationStructureGeometryDescriptor

Base class for all Metal 4 acceleration structure geometry descriptors.

## Declaration

```swift
class MTL4AccelerationStructureGeometryDescriptor
```

## Overview

Overview Don’t use this class directly. Use one of the derived classes instead.

## Topics

### Instance Properties

- [allowDuplicateIntersectionFunctionInvocation](metal/mtl4accelerationstructuregeometrydescriptor/allowduplicateintersectionfunctioninvocation.md)
- [intersectionFunctionTableOffset](metal/mtl4accelerationstructuregeometrydescriptor/intersectionfunctiontableoffset.md)
- [label](metal/mtl4accelerationstructuregeometrydescriptor/label.md)
- [opaque](metal/mtl4accelerationstructuregeometrydescriptor/opaque.md)
- [primitiveDataBuffer](metal/mtl4accelerationstructuregeometrydescriptor/primitivedatabuffer.md)
- [primitiveDataElementSize](metal/mtl4accelerationstructuregeometrydescriptor/primitivedataelementsize.md)
- [primitiveDataStride](metal/mtl4accelerationstructuregeometrydescriptor/primitivedatastride.md)

## Relationships

### Inherits From

- [NSObject](objectivec/nsobject-swift.class.md)

### Inherited By

- [MTL4AccelerationStructureBoundingBoxGeometryDescriptor](metal/mtl4accelerationstructureboundingboxgeometrydescriptor.md)
- [MTL4AccelerationStructureCurveGeometryDescriptor](metal/mtl4accelerationstructurecurvegeometrydescriptor.md)
- [MTL4AccelerationStructureMotionBoundingBoxGeometryDescriptor](metal/mtl4accelerationstructuremotionboundingboxgeometrydescriptor.md)
- [MTL4AccelerationStructureMotionCurveGeometryDescriptor](metal/mtl4accelerationstructuremotioncurvegeometrydescriptor.md)
- [MTL4AccelerationStructureMotionTriangleGeometryDescriptor](metal/mtl4accelerationstructuremotiontrianglegeometrydescriptor.md)
- [MTL4AccelerationStructureTriangleGeometryDescriptor](metal/mtl4accelerationstructuretrianglegeometrydescriptor.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSCopying](foundation/nscopying.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)

## See Also

### Geometry descriptors

- [MTLAccelerationStructureGeometryDescriptor](metal/mtlaccelerationstructuregeometrydescriptor.md)
- [MTL4AccelerationStructureTriangleGeometryDescriptor](metal/mtl4accelerationstructuretrianglegeometrydescriptor.md)
- [MTLAccelerationStructureTriangleGeometryDescriptor](metal/mtlaccelerationstructuretrianglegeometrydescriptor.md)
- [MTL4AccelerationStructureCurveGeometryDescriptor](metal/mtl4accelerationstructurecurvegeometrydescriptor.md)
- [MTLAccelerationStructureCurveGeometryDescriptor](metal/mtlaccelerationstructurecurvegeometrydescriptor.md)
- [MTLCurveType](metal/mtlcurvetype.md)
- [MTLCurveBasis](metal/mtlcurvebasis.md)
- [MTLCurveEndCaps](metal/mtlcurveendcaps.md)
- [MTL4AccelerationStructureBoundingBoxGeometryDescriptor](metal/mtl4accelerationstructureboundingboxgeometrydescriptor.md)
- [MTLAccelerationStructureBoundingBoxGeometryDescriptor](metal/mtlaccelerationstructureboundingboxgeometrydescriptor.md)