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thednp 2016-03-15 10:14:32 +02:00
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demo/src/kute-bezier.js
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/*
* KUTE.js - The Light Tweening Engine | dnp_theme
* package bezier easing
* BezierEasing by Gaëtan Renaudeau 2014 – MIT License
* optimized by dnp_theme 2015 – MIT License
* Licensed under MIT-License
*/
// /* THIS IS THE OLD CODE */
// (function(kute_ea){
// // Obtain a reference to the base KUTE.
// // Since KUTE supports a variety of module systems,
// // we need to pick up which one to use.
// if(define == "function") {
// define(["./kute.js"], function(KUTE){ kute_ea(KUTE); return KUTE; });
// } else if(typeof module == "object" && typeof require == "function") {
// // We assume, that require() is sync.
// var KUTE = require("./kute.js");
// kute_ea(KUTE);
// // Export the modified one. Not really required, but convenient.
// module.exports = KUTE;
// } else if(typeof window.KUTE != "undefined") {
// kute_ea(window.KUTE);
// } else {
// throw new Error("KUTE.js Bezier/Easing depends on KUTE.js. Read the docs for more info.")
// }
// })(function(KUTE){
(function (factory) {
if (typeof define === 'function' && define.amd) {
define(["./kute.js"], function(KUTE){ factory(KUTE); return KUTE; });
} else if(typeof module == "object" && typeof require == "function") {
// We assume, that require() is sync.
var KUTE = require("./kute.js");
// Export the modified one. Not really required, but convenient.
module.exports = factory(KUTE);
} else if ( typeof window.KUTE !== 'undefined' ) {
// Browser globals
window.KUTE.Ease = window.KUTE.Ease || factory(KUTE);
} else {
throw new Error("Bezier Easing functions depend on KUTE.js. Read the docs for more info.");
}
}( function (KUTE) {
'use strict';
var E = E || {};
E.Bezier = function(mX1, mY1, mX2, mY2) {
return _bz.pB(mX1, mY1, mX2, mY2);
};
var _bz = E.Bezier.prototype;
// These values are established by empiricism with tests (tradeoff: performance VS precision)
_bz.ni = 4; // NEWTON_ITERATIONS
_bz.nms = 0.001; // NEWTON_MIN_SLOPE
_bz.sp = 0.0000001; // SUBDIVISION_PRECISION
_bz.smi = 10, // SUBDIVISION_MAX_ITERATIONS
_bz.ksts = 11; // k Spline Table Size
_bz.ksss = 1.0 / (_bz.ksts - 1.0); // k Sample Step Size
_bz.f32as = 'Float32Array' in window; // float32ArraySupported
_bz.msv = _bz.f32as ? new Float32Array (_bz.ksts) : new Array (_bz.ksts); // m Sample Values
_bz.A = function(aA1, aA2) { return 1.0 - 3.0 * aA2 + 3.0 * aA1; };
_bz.B = function(aA1, aA2) { return 3.0 * aA2 - 6.0 * aA1; };
_bz.C = function(aA1) { return 3.0 * aA1; };
_bz.r = {};
_bz.pB = function (mX1, mY1, mX2, mY2) {
this._p = false; var self = this;
_bz.r = function(aX){
if (!self._p) _bz.pc(mX1, mX2, mY1, mY2);
if (mX1 === mY1 && mX2 === mY2) return aX;
if (aX === 0) return 0;
if (aX === 1) return 1;
return _bz.cB(_bz.gx(aX, mX1, mX2), mY1, mY2);
};
return _bz.r;
};
// Returns x(t) given t, x1, and x2, or y(t) given t, y1, and y2.
_bz.cB = function(aT, aA1, aA2) { // calc Bezier
return ((_bz.A(aA1, aA2)*aT + _bz.B(aA1, aA2))*aT + _bz.C(aA1))*aT;
};
// Returns dx/dt given t, x1, and x2, or dy/dt given t, y1, and y2.
_bz.gS = function (aT, aA1, aA2) { // getSlope
return 3.0 * _bz.A(aA1, aA2)*aT*aT + 2.0 * _bz.B(aA1, aA2) * aT + _bz.C(aA1);
};
_bz.bS = function(a, aA, aB, mX1, mX2) { // binary Subdivide
var x, t, i = 0, j = _bz.sp, y = _bz.smi;
do {
t = aA + (aB - aA) / 2.0;
x = _bz.cB(t, mX1, mX2) - a;
if (x > 0.0) {
aB = t;
} else {
aA = t;
}
} while (Math.abs(x) > j && ++i < y);
return t;
};
_bz.nri = function (aX, agt, mX1, mX2) { // newton Raphs on Iterate
var i = 0, j = _bz.ni;
for (i; i < j; ++i) {
var cs = _bz.gS(agt, mX1, mX2);
if (cs === 0.0) return agt;
var x = _bz.cB(agt, mX1, mX2) - aX;
agt -= x / cs;
}
return agt;
};
_bz.csv = function (mX1, mX2) { // calc Sample Values
var i = 0, j = _bz.ksts;
for (i; i < j; ++i) {
_bz.msv[i] = _bz.cB(i * _bz.ksss, mX1, mX2);
}
};
_bz.gx = function (aX,mX1,mX2) { //get to X
var iS = 0.0, cs = 1, ls = _bz.ksts - 1;
for (; cs != ls && _bz.msv[cs] <= aX; ++cs) {
iS += _bz.ksss;
}
--cs;
// Interpolate to provide an initial guess for t
var dist = (aX - _bz.msv[cs]) / (_bz.msv[cs+1] - _bz.msv[cs]),
gt = iS + dist * _bz.ksss,
ins = _bz.gS(gt, mX1, mX2),
fiS = iS + _bz.ksss;
if (ins >= _bz.nms) {
return _bz.nri(aX, gt, mX1, mX2);
} else if (ins === 0.0) {
return gt;
} else {
return _bz.bS(aX, iS, fiS, mX1, mX2);
}
};
_bz.pc = function(mX1, mX2, mY1, mY2) {
this._p = true;
if (mX1 != mY1 || mX2 != mY2)
_bz.csv(mX1, mX2);
};
// predefined bezier based easings, can be accessed via string, eg 'easeIn' or 'easeInOutQuart'
// _easings = ["linear","easeInQuad","easeOutQuad","easeInOutQuad","easeInCubic","easeOutCubic","easeInOutCubic","easeInQuart","easeInQuart","easeOutQuart","easeInOutQuart","easeInQuint","easeOutQuint","easeInOutQuint","easeInExpo","easeOutExpo","easeInOutExpo","slowMo","slowMo1","slowMo2"],
E.easeIn = function(){ return _bz.pB(0.42, 0.0, 1.00, 1.0); };
E.easeOut = function(){ return _bz.pB(0.00, 0.0, 0.58, 1.0); };
E.easeInOut = function(){ return _bz.pB(0.50, 0.16, 0.49, 0.86); };
E.easeInSine = function(){ return _bz.pB(0.47, 0, 0.745, 0.715); };
E.easeOutSine = function(){ return _bz.pB(0.39, 0.575, 0.565, 1); };
E.easeInOutSine = function(){ return _bz.pB(0.445, 0.05, 0.55, 0.95); };
E.easeInQuad = function () { return _bz.pB(0.550, 0.085, 0.680, 0.530); };
E.easeOutQuad = function () { return _bz.pB(0.250, 0.460, 0.450, 0.940); };
E.easeInOutQuad = function () { return _bz.pB(0.455, 0.030, 0.515, 0.955); };
E.easeInCubic = function () { return _bz.pB(0.55, 0.055, 0.675, 0.19); };
E.easeOutCubic = function () { return _bz.pB(0.215, 0.61, 0.355, 1); };
E.easeInOutCubic = function () { return _bz.pB(0.645, 0.045, 0.355, 1); };
E.easeInQuart = function () { return _bz.pB(0.895, 0.03, 0.685, 0.22); };
E.easeOutQuart = function () { return _bz.pB(0.165, 0.84, 0.44, 1); };
E.easeInOutQuart = function () { return _bz.pB(0.77, 0, 0.175, 1); };
E.easeInQuint = function(){ return _bz.pB(0.755, 0.05, 0.855, 0.06); };
E.easeOutQuint = function(){ return _bz.pB(0.23, 1, 0.32, 1); };
E.easeInOutQuint = function(){ return _bz.pB(0.86, 0, 0.07, 1); };
E.easeInExpo = function(){ return _bz.pB(0.95, 0.05, 0.795, 0.035); };
E.easeOutExpo = function(){ return _bz.pB(0.19, 1, 0.22, 1); };
E.easeInOutExpo = function(){ return _bz.pB(1, 0, 0, 1); };
E.easeInCirc = function(){ return _bz.pB(0.6, 0.04, 0.98, 0.335); };
E.easeOutCirc = function(){ return _bz.pB(0.075, 0.82, 0.165, 1); };
E.easeInOutCirc = function(){ return _bz.pB(0.785, 0.135, 0.15, 0.86); };
E.easeInBack = function(){ return _bz.pB(0.600, -0.280, 0.735, 0.045); };
E.easeOutBack = function(){ return _bz.pB(0.175, 0.885, 0.320, 1.275); };
E.easeInOutBack = function(){ return _bz.pB(0.68, -0.55, 0.265, 1.55); };
E.slowMo = function(){ return _bz.pB(0.000, 0.500, 1.000, 0.500); };
E.slowMo1 = function(){ return _bz.pB(0.000, 0.700, 1.000, 0.300); };
E.slowMo2 = function(){ return _bz.pB(0.000, 0.900, 1.000, 0.100); };
return E;
}));