--- /dev/null
+define(function(){
+ /**
+ * Gets normalized ratio of value inside range.
+ */
+ function norm(val, min, max){
+ if (val < min || val > max) {
+ throw new RangeError('value (' + val + ') must be between ' + min + ' and ' + max);
+ }
+
+ return val === max ? 1 : (val - min) / (max - min);
+ }
+ return norm;
+});