# init(curvature:radius:size:transform:) ``` init(curvature: Double, radius: FxPoint2D, size: FxPoint2D, transform: Unmanaged!) ``` ## Parameters `curvature` The curvature of the ellipse, if applicable. `radius` The radius of the ellipse, if applicable. `size` The size of the rectangle, if applicable. `transform` The shape’s transformation matrix. --- 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)