setFlatness(_:)
Sets the accuracy of curved paths in a graphics context.
Declaration
func setFlatness(_ flatness: CGFloat)Parameters
- flatness:
The largest permissible distance, measured in device pixels, between a point on the true curve and a point on the approximated curve.
Discussion
This function controls how accurately curved paths are rendered. Setting the flatness value to less than 1.0 renders highly accurate curves, but lengthens rendering times.
In most cases, you should not change the flatness value. Customizing the flatness value for the capabilities of a particular output device impairs the ability of your application to render to other devices.