# calculateArea(_:for:orientedArea:) Calculates the area for the specified contour. ``` class func calculateArea(_ area: UnsafeMutablePointer, for contour: VNContour, orientedArea: Bool) throws ``` ## Parameters `area` The output parameter to populate with the calculated contour area. `contour` The contour object for which to calculate the area. `orientedArea` A Boolean value that indicates whether to calculate the signed area (positive for counterclockwise-oriented contours and negative for clockwise-oriented contours). If you specify , the returned area is always positive. ## Discussion Attempting to calculate the area for a contour containing random points, or with self-crossing edges, produces undefined results. --- 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)