AS3 - Map

Main.as

private function map(value:Number, low1:Number, high1:Number, low2:Number = 0, high2:Number = 1):Number {
	//El valor, valor min del original, valor máx del original, valor min, valor max
	//myBox.x = map(mouseX, 0, 550, 100, 200);v
	//http://lab.joelgillman.com/archives/87_map-function
	//if the value and the 1st range low are equal to
	// the new value must be low2
	if (value == low1){
		return low2;
	}
	
	//normalize both sets to a 0-? range
	var range1 = high1 - low1;
	var range2 = high2 - low2;
	//normalize the value to the new normalized range
	var result = value - low1;
	//define the range as a percentage (0.0 to 1.0)
	var ratio = result / range1;
	//find the value in the new normalized-range
	result = ratio * range2;
	//un-normalize the value in the new range
	result += low2;
	return result;
}

private function map(v:Number, a:Number, b:Number, x:Number = 0, y:Number = 1):Number {
	return (v == a) ? x : (v - a) * (y - x) / (b - a) + x;
}