---
title: MTLAccelerationStructureTriangleGeometryDescriptor
framework: metal
role: symbol
role_heading: Class
path: metal/mtlaccelerationstructuretrianglegeometrydescriptor
---

# MTLAccelerationStructureTriangleGeometryDescriptor

A description of a list of triangle primitives to turn into an acceleration structure.

## Declaration

```swift
class MTLAccelerationStructureTriangleGeometryDescriptor
```

## Mentioned in

Improving ray-tracing data access using per-primitive data

## Topics

### Configuring the number of triangles

- [triangleCount](metal/mtlaccelerationstructuretrianglegeometrydescriptor/trianglecount.md)

### Configuring index data

- [indexType](metal/mtlaccelerationstructuretrianglegeometrydescriptor/indextype.md)
- [indexBuffer](metal/mtlaccelerationstructuretrianglegeometrydescriptor/indexbuffer.md)
- [indexBufferOffset](metal/mtlaccelerationstructuretrianglegeometrydescriptor/indexbufferoffset.md)

### Configuring vertex data

- [vertexFormat](metal/mtlaccelerationstructuretrianglegeometrydescriptor/vertexformat.md)
- [vertexBuffer](metal/mtlaccelerationstructuretrianglegeometrydescriptor/vertexbuffer.md)
- [vertexBufferOffset](metal/mtlaccelerationstructuretrianglegeometrydescriptor/vertexbufferoffset.md)
- [vertexStride](metal/mtlaccelerationstructuretrianglegeometrydescriptor/vertexstride.md)

### Configuring transformation data

- [transformationMatrixLayout](metal/mtlaccelerationstructuretrianglegeometrydescriptor/transformationmatrixlayout.md)
- [transformationMatrixBuffer](metal/mtlaccelerationstructuretrianglegeometrydescriptor/transformationmatrixbuffer.md)
- [transformationMatrixBufferOffset](metal/mtlaccelerationstructuretrianglegeometrydescriptor/transformationmatrixbufferoffset.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)
- [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)