# markAreaInCylinder(position:radius:halfHeight:area:) Marks all polygons in this cylinder with an area. ``` func markAreaInCylinder(position: SIMD3, radius: Float, halfHeight: Float, area: NavigationMeshResource.Area) ``` --- 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)