# faces An object that contains a buffer of vertex indices of the geometry’s faces. ``` var faces: ARGeometryElement { get } ``` ## Discussion Each element of the buffer-based array is a three-index combination that forms a unique triangle, or *face*. The index refers to that vertex’s position in the [`vertices`](/documentation/ARKit/ARMeshGeometry/vertices) array. The [`count`](/documentation/ARKit/ARGeometryElement/count) of this property represents the number of faces. The following code demonstrates getting the vertices of a particular face: ```swift extension ARMeshGeometry { func vertexIndicesOf(faceWithIndex index: Int) -> [Int] { let indicesPerFace = faces.indexCountPerPrimitive let facesPointer = faces.buffer.contents() var vertexIndices = [Int]() for offset in 0...size) vertexIndices.append(Int(vertexIndexAddress.assumingMemoryBound(to: UInt32.self).pointee)) } return vertexIndices } } ``` --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)