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Freeform Drawing in iOS This sample project demonstrates how to draw freeform lines in iOS. Based strongly on: http://stackoverflow.com/questions/5076622/iphone-smooth-sketch-drawing-algorithm The main classes are - MotionTrackingViewController.h/m View Controller that adds a pan gesture recognizer to the screen and conveys the information to the drawing delegate, FreeformLineDrawer. This controller also creates a layer that is added to the view. - FreeformLineDrawer.h/m Drawing delegate for the CALayer. Maintains a CFMutableArray that keeps track of all the paths that have been drawn onto the screen. Keeps track of paths that have been added. Contributions are welcome.