# vertex(_:at:ofPath:at:) Provides information about a single vertex on the path at the given time. ``` func vertex(_ vertex: UnsafeMutablePointer!, at index: Int, ofPath pathID: FxPathID!, at time: CMTime) throws ``` ## Parameters `vertex` A pointer to an FxVertex structure to hold the information about the vertex in question. `index` The index of the vertex you want to retrieve. This is `0`-based, so if the path has `n` vertices, this will be between `0` and `n-1`. `pathID` The ID of the path from which you wish to retrieve a vertex. `time` The time at which to retrieve the vertex information. --- 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)