File: src\utils\math\math.js

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/**
 * Static class that encapsulates some useful methods.
 * @module Math
 * @main Math
 * @static
 * @class CGSGMath
 * @author Gwennael Buchet (gwennael.buchet@gmail.com)
 */
var CGSGMath = {
	/**
	 * PI x 2
	 * @static
	 * @property PI2
	 */
	PI2: 6.28318530718, //Math.PI * 2.0,

	/**
	 * Convert degree to radian
	 * @method deg2rad
	 * @static
	 * @param {Number} angle
	 * @return {Number} The radian value
	 */
	deg2rad: function (angle) {
		return (angle / 180.0) * Math.PI;
	},

	/**
	 * Convert radian to degree
	 * @method rad2deg
	 * @static
	 * @param {Number} angle
	 * @return {Number} The degree value
	 */
	rad2deg: function (angle) {
		return angle * 57.29577951308232;
	},

	/**
	 * Compute the rounded integer of n
	 * @method fixedPoint
	 * @static
	 * @param {Number} n
	 * @return {Number} The integer value
	 */
	fixedPoint: function (n) {
		return (0.5 + n) << 0;
	},

	/**
	 * Linear interpolation between 'from' and 'to'
	 * @method lerp
	 * @static
	 * @param {Number} from
	 * @param {Number} to
	 * @param {Number} weight Percentage to apply to the first value
	 * @return {Number} The interpolated value
	 */
	lerp: function (from, to, weight) {
		return from + (to - from) * weight;
	}
};