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//returns the interpolated value from a and b at the given weight (from 0 to 1)
var lerp = function(a, b, w) { 
  return (1 - w) * a + w * b;
}

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Number.prototype.clamp = function(min, max) {
  return Math.min(Math.max(this, min), max);
};

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function generateID() {
	return ("000000" + (Math.random()*Math.pow(36,6) << 0).toString(36)).slice(-6));
}

function generateIDFromStr() {
	var seed = str.split("").reduce(function(a,b){a=((a<<5)-a)+b.charCodeAt(0);return a&a},0);
	return ( "000000" + ( seed << 0 ).toString( 36 ) ).slice( -6 );
}

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function rgb2Hex(r, g, b) {
    return '#' + ((1 << 24) + (r << 16) + (g << 8) + b).toString(16).substr(1);
}

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function isOdd(number) {
    return !!(number & 1);
}

// Floor Float aka cast to Int
var n = 1.9 | 0; // -> 1

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function getRandomNumber(min, max) {
    return Math.random() * (max - min) + min;
}

function getRandomColor() {
    // http://stackoverflow.com/questions/1484506/random-color-generator-in-javascript
    return "#"+((1<<24)*Math.random()|0).toString(16);
}

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// @input: discrete counter
// @min: lower value
// @max: maximum value
function oscillate(input, min, max) {
  var range = max - min;
  return min + Math.abs(((input + range) % (range * 2)) - range);
}

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private traverse(obj: any, interatee: Funcion) {
    for (var i in obj) {
        func.apply(this, [i, obj[i]]);
        if (obj[i] !== null && typeof (obj[i]) == "object") {
            this.traverse(obj[i], iteratee);
        }
    }
}

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function getSizeToCover(width, height, maxWidth, maxHeight) {
    var ratio = Math.max(maxWidth / width, maxHeight / height);
    return {
        width: width * ratio,
        height: height * ratio
    };
}

function getSizeToContain(width, height, maxWidth, maxHeight) {
    var ratio = Math.min(maxWidth / width, maxHeight / height);

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//Some functions where taken from Jistin Windle's sketch.js at https://github.com/soulwire/sketch.js

// Modulus with support for negative integers
Mod = function(current, limit) {
    return ( (current % limit) + limit ) % limit;
};

function isArray( object ) {
  
  return Object.prototype.toString.call( object ) == '[object Array]';