# calculateAccumulatedFrame() Returns a rectangle in the parent’s coordinate system that contains the position and size of itself and all child nodes. ``` func calculateAccumulatedFrame() -> CGRect ``` ## Discussion The frame takes into the account the cumulative effect of the [`xScale`](/documentation/SpriteKit/SKNode/xScale), [`yScale`](/documentation/SpriteKit/SKNode/yScale), and [`zRotation`](/documentation/SpriteKit/SKNode/zRotation) properties of each node in the subtree. Listing 1 shows, in Swift, how [`calculateAccumulatedFrame()`](/documentation/SpriteKit/SKNode/calculateAccumulatedFrame()) can be used display the bounding box of a shape node. The child node, although smaller than its parent, is rotated by 30° so that its bounds extend beyond its parent’s bounds. After `childNode` has been added to `parentNode`, a further shape node, `boundingBoxNode`, is created with its size based on the accumulated frame of parentNode. Listing 1. Displaying the accumulated frame of a shape node ```swift let parentNode = SKShapeNode(rectOf: CGSize(width: 500, height: 500)) parentNode.lineWidth = 2 parentNode.strokeColor = .blue parentNode.fillColor = .clear let childNode = SKShapeNode(rectOf: CGSize(width: 400, height: 400)) childNode.strokeColor = .red childNode.fillColor = .clear childNode.zRotation = -CGFloat.pi / 6 // pi / 6 = 30° parentNode.addChild(childNode) let boundingBoxNode = SKShapeNode(rectOf: parentNode.calculateAccumulatedFrame().size) boundingBoxNode.lineWidth = 1 boundingBoxNode.strokeColor = .black boundingBoxNode.fillColor = .clear boundingBoxNode.path = boundingBoxNode.path?.copy(dashingWithPhase: 0, lengths: [10,10]) parentNode.addChild(boundingBoxNode) ``` The figure below shows the result of Listing 1 with `parentNode` rendered in blue, `childNode` rendered in red and the `boundingBoxNode` rendered with a dashed line.  --- 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)