~function () { //=>珠峰培训TWEEN算法动画公式(除了匀速还有非匀速的公式) //=>http://old.zhufengpeixun.cn/tween/ var animationEffect = { Linear: function (t, b, c, d) { return c * t / d + b; }, Bounce: { easeIn: function (t, b, c, d) { return c - animationEffect.Bounce.easeOut(d - t, 0, c, d) + b; }, easeOut: function (t, b, c, d) { if ((t /= d) < (1 / 2.75)) { return c * (7.5625 * t * t) + b; } else if (t < (2 / 2.75)) { return c * (7.5625 * (t -= (1.5 / 2.75)) * t + .75) + b; } else if (t < (2.5 / 2.75)) { return c * (7.5625 * (t -= (2.25 / 2.75)) * t + .9375) + b; } else { return c * (7.5625 * (t -= (2.625 / 2.75)) * t + .984375) + b; } }, easeInOut: function (t, b, c, d) { if (t < d / 2) { return animationEffect.Bounce.easeIn(t * 2, 0, c, d) * .5 + b; } return animationEffect.Bounce.easeOut(t * 2 - d, 0, c, d) * .5 + c * .5 + b; } }, Quad: { easeIn: function (t, b, c, d) { return c * (t /= d) * t + b; }, easeOut: function (t, b, c, d) { return -c * (t /= d) * (t - 2) + b; }, easeInOut: function (t, b, c, d) { if ((t /= d / 2) < 1) { return c / 2 * t * t + b; } return -c / 2 * ((--t) * (t - 2) - 1) + b; } }, Cubic: { easeIn: function (t, b, c, d) { return c * (t /= d) * t * t + b; }, easeOut: function (t, b, c, d) { return c * ((t = t / d - 1) * t * t + 1) + b; }, easeInOut: function (t, b, c, d) { if ((t /= d / 2) < 1) { return c / 2 * t * t * t + b; } return c / 2 * ((t -= 2) * t * t + 2) + b; } }, Quart: { easeIn: function (t, b, c, d) { return c * (t /= d) * t * t * t + b; }, easeOut: function (t, b, c, d) { return -c * ((t = t / d - 1) * t * t * t - 1) + b; }, easeInOut: function (t, b, c, d) { if ((t /= d / 2) < 1) { return c / 2 * t * t * t * t + b; } return -c / 2 * ((t -= 2) * t * t * t - 2) + b; } }, Quint: { easeIn: function (t, b, c, d) { return c * (t /= d) * t * t * t * t + b; }, easeOut: function (t, b, c, d) { return c * ((t = t / d - 1) * t * t * t * t + 1) + b; }, easeInOut: function (t, b, c, d) { if ((t /= d / 2) < 1) { return c / 2 * t * t * t * t * t + b; } return c / 2 * ((t -= 2) * t * t * t * t + 2) + b; } }, Sine: { easeIn: function (t, b, c, d) { return -c * Math.cos(t / d * (Math.PI / 2)) + c + b; }, easeOut: function (t, b, c, d) { return c * Math.sin(t / d * (Math.PI / 2)) + b; }, easeInOut: function (t, b, c, d) { return -c / 2 * (Math.cos(Math.PI * t / d) - 1) + b; } }, Expo: { easeIn: function (t, b, c, d) { return (t == 0) ? b : c * Math.pow(2, 10 * (t / d - 1)) + b; }, easeOut: function (t, b, c, d) { return (t == d) ? b + c : c * (-Math.pow(2, -10 * t / d) + 1) + b; }, easeInOut: function (t, b, c, d) { if (t == 0) return b; if (t == d) return b + c; if ((t /= d / 2) < 1) return c / 2 * Math.pow(2, 10 * (t - 1)) + b; return c / 2 * (-Math.pow(2, -10 * --t) + 2) + b; } }, Circ: { easeIn: function (t, b, c, d) { return -c * (Math.sqrt(1 - (t /= d) * t) - 1) + b; }, easeOut: function (t, b, c, d) { return c * Math.sqrt(1 - (t = t / d - 1) * t) + b; }, easeInOut: function (t, b, c, d) { if ((t /= d / 2) < 1) { return -c / 2 * (Math.sqrt(1 - t * t) - 1) + b; } return c / 2 * (Math.sqrt(1 - (t -= 2) * t) + 1) + b; } }, Back: { easeIn: function (t, b, c, d, s) { if (s == undefined) s = 1.70158; return c * (t /= d) * t * ((s + 1) * t - s) + b; }, easeOut: function (t, b, c, d, s) { if (s == undefined) s = 1.70158; return c * ((t = t / d - 1) * t * ((s + 1) * t + s) + 1) + b; }, easeInOut: function (t, b, c, d, s) { if (s == undefined) s = 1.70158; if ((t /= d / 2) < 1) { return c / 2 * (t * t * (((s *= (1.525)) + 1) * t - s)) + b; } return c / 2 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2) + b; } }, Elastic: { easeIn: function (t, b, c, d, a, p) { if (t == 0) return b; if ((t /= d) == 1) return b + c; if (!p) p = d * .3; var s; !a || a < Math.abs(c) ? (a = c, s = p / 4) : s = p / (2 * Math.PI) * Math.asin(c / a); return -(a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p)) + b; }, easeOut: function (t, b, c, d, a, p) { if (t == 0) return b; if ((t /= d) == 1) return b + c; if (!p) p = d * .3; var s; !a || a < Math.abs(c) ? (a = c, s = p / 4) : s = p / (2 * Math.PI) * Math.asin(c / a); return (a * Math.pow(2, -10 * t) * Math.sin((t * d - s) * (2 * Math.PI) / p) + c + b); }, easeInOut: function (t, b, c, d, a, p) { if (t == 0) return b; if ((t /= d / 2) == 2) return b + c; if (!p) p = d * (.3 * 1.5); var s; !a || a < Math.abs(c) ? (a = c, s = p / 4) : s = p / (2 * Math.PI) * Math.asin(c / a); if (t < 1) return -.5 * (a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p)) + b; return a * Math.pow(2, -10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p) * .5 + c + b; } } }; //=>realization animate (depend on utils) function animate(options) { //->initialize(init) parameters var _default = { curEle: null, target: null, duration: 1000, effect: animationEffect.Linear, callBack: null }; for (var attr in options) { if (options.hasOwnProperty(attr)) { _default[attr] = options[attr]; } } var curEle = _default.curEle, target = _default.target, duration = _default.duration, effect = _default.effect, callBack = _default.callBack; //->prepare T/B/C/D var time = 0, begin = {}, change = {}; for (var key in target) { if (target.hasOwnProperty(key)) { begin[key] = utils.css(curEle, key); change[key] = target[key] - begin[key]; } } //->running (clear other animate before running) clearInterval(curEle.animateTimer); curEle.animateTimer = setInterval(function () { time += 17; if (time >= duration) { utils.css(curEle, target); clearInterval(curEle.animateTimer); //->run end：perform callback functions callBack && callBack.call(curEle); return; } var current = {}; for (var key in target) { if (target.hasOwnProperty(key)) { current[key] = effect(time, begin[key], change[key], duration); } } utils.css(curEle, current); }, 17); } //=>setting window property window.zhufengEffect = animationEffect; window.zhufengAnimate = animate; }();