/example: draggable image and video
/example2: draggable rectangle
openFrameworks addon. adds interactive scale and dragging to the ofRectangle class.
Created by Roy Macdonald on 8/15/12.
Copyright (c) 2012 micasa. All rights reserved.
Updated by Aaron Richards on 13/05/2014.
Updated by moebiusSurfing, 2020. Added simple rectangle example