Use this class to generate arithmetic (“Archimedes”) spirals. It uses Bézier curve approximation to create a UIBezierPath of the form r = a + bθ.
ZESpiral requires iOS 5.1 and ARC.
Includes a demo project with sliders to change the following parameters:
- How far from the center point to start the spiral. Use this parameter to make a hole in the center of your spiral.
- A coefficient for how much the spiral grows over each rotation.
- The angle of the initial point in the center.
- How far around to go before stopping.
- How often to add a bezier control point. Lower values result in a more accurate but more complex path, which may be expensive to draw depending on what you are doing.
Some of these parameters will give you interesting results if you pass in negative numbers.
There is also a QT port of this code.
Copyright © 2013 Zev Eisenberg
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