# vertices The vertices of the mesh. ``` var vertices: ARGeometrySource { get } ``` ## Discussion The [`count`](/documentation/ARKit/ARGeometrySource/count) equals the total number of vertices. Since each vertex is the type `SIMD3`, [`componentsPerVector`](/documentation/ARKit/ARGeometrySource/componentsPerVector) is three. The following code demonstrates retrieving a vertex at a particular index. ```swift extension ARMeshGeometry { func vertex(at index: UInt32) -> SIMD3 { assert(vertices.format == MTLVertexFormat.float3, "Expected three floats (twelve bytes) per vertex.") let vertexPointer = vertices.buffer.contents().advanced(by: vertices.offset + (vertices.stride * Int(index))) let vertex = vertexPointer.assumingMemoryBound(to: SIMD3.self).pointee return vertex } } ``` --- 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)