---
title: MTLAccelerationStructureBoundingBoxGeometryDescriptor
framework: metal
role: symbol
role_heading: Class
path: metal/mtlaccelerationstructureboundingboxgeometrydescriptor
---

# MTLAccelerationStructureBoundingBoxGeometryDescriptor

A description of a list of bounding boxes to turn into an acceleration structure.

## Declaration

```swift
class MTLAccelerationStructureBoundingBoxGeometryDescriptor
```

## Mentioned in

Improving ray-tracing data access using per-primitive data

## Topics

### Specifying the number of bounding boxes

- [boundingBoxCount](metal/mtlaccelerationstructureboundingboxgeometrydescriptor/boundingboxcount.md)

### Specifying bounding boxes data

- [boundingBoxBuffer](metal/mtlaccelerationstructureboundingboxgeometrydescriptor/boundingboxbuffer.md)
- [boundingBoxBufferOffset](metal/mtlaccelerationstructureboundingboxgeometrydescriptor/boundingboxbufferoffset.md)
- [boundingBoxStride](metal/mtlaccelerationstructureboundingboxgeometrydescriptor/boundingboxstride.md)

## Relationships

### Inherits From

- [MTLAccelerationStructureGeometryDescriptor](metal/mtlaccelerationstructuregeometrydescriptor.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

- [MTL4AccelerationStructureGeometryDescriptor](metal/mtl4accelerationstructuregeometrydescriptor.md)
- [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)