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# addRoundedRect(in:cornerWidth:cornerHeight:transform:)

Adds a subpath to the path, in the shape of a rectangle with rounded corners.

```
func addRoundedRect(in rect: CGRect, cornerWidth: CGFloat, cornerHeight: CGFloat, transform: CGAffineTransform = .identity)
```

## Parameters

`rect`

The rectangle to add, specified in user space coordinates.

`cornerWidth`

The horizontal size, in user space coordinates, for rounded corner sections.

`cornerHeight`

The vertical size, in user space coordinates, for rounded corner sections.

`transform`

An affine transform to apply to the rectangle before adding to the path. Defaults to the identity transform if not specified.

## Discussion

This convenience method is equivalent to a move operation to start the subpath followed by a series of arc and line operations that construct the rounded rectangle. Each corner of the rounded rectangle is one-quarter of an ellipse with axes equal to the `cornerWidth` and `cornerHeight` parameters. The rounded rectangle forms a closed subpath oriented in the clockwise direction.

---

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