Use ol.math.clamp()

src/ol/math.js

@@ -3,6 +3,19 @@ goog.provide('ol.math');
 goog.require('goog.asserts');
 
 
+/**
+ * Takes a number and clamps it to within the provided bounds.
+ * @param {number} value The input number.
+ * @param {number} min The minimum value to return.
+ * @param {number} max The maximum value to return.
+ * @return {number} The input number if it is within bounds, or the nearest
+ *     number within the bounds.
+ */
+ol.math.clamp = function(value, min, max) {
+  return Math.min(Math.max(value, min), max);
+};
+
+
 /**
  * @param {number} x X.
  * @return {number} Hyperbolic cosine of x.