map.h

static inline CGFloat map(CGFloat input, CGFloat inMinimum, CGFloat inMaximum, CGFloat outMinimum, CGFloat outMaximum)
{
	CGFloat returnValue;
	CGFloat deltaIn	= inMaximum - inMinimum;
	CGFloat deltaOut = outMaximum - outMinimum;
	
	returnValue = (input - inMinimum) / deltaIn;
	returnValue = returnValue * deltaOut;
	returnValue = returnValue + outMinimum;
	
	return returnValue;
}