A utility class that will take a number and the range that the number belongs in, and re-map it to whatever the equivalent number is in your destination range.It uses the algrebraic method and is flawless. You can literally map any range to any range regardless of where on the number line the range starts and ends.Overloaded methods allow you to…

RangeMap.java

public class RangeMap {
	public static double reMap(double sourceNumber, double fromRangeStart, double fromRangeEnd, double toRangeStart, double toRangeEnd, int decimalPrecision ) {
		double deltaA = fromRangeEnd - fromRangeStart;
		double deltaB = toRangeEnd - toRangeStart;
		double scale  = deltaB / deltaA;
		double negA   = -1 * fromRangeStart;
		double offset = (negA * scale) + toRangeStart;
		double finalNumber = (sourceNumber * scale) + offset;
		int calcScale = (int) Math.pow(10, decimalPrecision);
		return (double) Math.round(finalNumber * calcScale) / calcScale;
	}

	
	public static int reMap(double sourceNumber, double fromRangeStart, double fromRangeEnd, double toRangeStart, double toRangeEnd) {
		return (int) reMap(sourceNumber,fromRangeStart,fromRangeEnd,toRangeStart,toRangeEnd,0);
	}
}