var Tween = {
linear: function (t, b, c, d){ //匀速
return c*t/d + b;
},
easeIn: function(t, b, c, d){ //加速曲线
return c*(t/=d)*t + b;
},
easeOut: function(t, b, c, d){ //减速曲线
return -c *(t/=d)*(t-2) + b;
},
easeBoth: function(t, b, c, d){ //加速减速曲线
if ((t/=d/2) < 1) {
return c/2*t*t + b;
}
return -c/2 * ((--t)*(t-2) - 1) + b;
},
easeInStrong: function(t, b, c, d){ //加加速曲线
return c*(t/=d)*t*t*t + b;
},
easeOutStrong: function(t, b, c, d){ //减减速曲线
return -c * ((t=t/d-1)*t*t*t - 1) + b;
},
easeBothStrong: function(t, b, c, d){ //加加速减减速曲线
if ((t/=d/2) < 1) {
return c/2*t*t*t*t + b;
}
return -c/2 * ((t-=2)*t*t*t - 2) + b;
},
elasticIn: function(t, b, c, d, a, p){ //正弦衰减曲线（弹动渐入）
if (t === 0) {
return b;
}
if ( (t /= d) == 1 ) {
return b+c;
}
if (!p) {
p=d*0.3;
}
if (!a || a < Math.abs(c)) {
a = c;
var s = p/4;
} else {
var 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;
},
elasticOut: function(t, b, c, d, a, p){ //*正弦增强曲线（弹动渐出）
if (t === 0) {
return b;
}
if ( (t /= d) == 1 ) {
return b+c;
}
if (!p) {
p=d*0.3;
}
if (!a || a < Math.abs(c)) {
a = c;
var s = p / 4;
} else {
var 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;
},
elasticBoth: function(t, b, c, d, a, p){
if (t === 0) {
return b;
}
if ( (t /= d/2) == 2 ) {
return b+c;
}
if (!p) {
p = d*(0.3*1.5);
}
if ( !a || a < Math.abs(c) ) {
a = c;
var s = p/4;
}
else {
var s = p/(2*Math.PI) * Math.asin (c/a);
}
if (t < 1) {
return - 0.5*(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 )*0.5 + c + b;
},
backIn: function(t, b, c, d, s){ //回退加速（回退渐入）
if (typeof s == 'undefined') {
s = 1.70158;
}
return c*(t/=d)*t*((s+1)*t - s) + b;
},
backOut: function(t, b, c, d, s){
if (typeof s == 'undefined') {
s = 1.70158; //回缩的距离
}
return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;
},
backBoth: function(t, b, c, d, s){
if (typeof 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;
},
bounceIn: function(t, b, c, d){ //弹球减振（弹球渐出）
return c - Tween['bounceOut'](d-t, 0, c, d) + b;
},
bounceOut: 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 + 0.75) + b;
} else if (t < (2.5/2.75)) {
return c*(7.5625*(t-=(2.25/2.75))*t + 0.9375) + b;
}
return c*(7.5625*(t-=(2.625/2.75))*t + 0.984375) + b;
},
bounceBoth: function(t, b, c, d){
if (t < d/2) {
return Tween['bounceIn'](t*2, 0, c, d) * 0.5 + b;
}
return Tween['bounceOut'](t*2-d, 0, c, d) * 0.5 + c*0.5 + b;
}
};
(function(){
if(!window.requestAnimationFrame){
var lastTime = 0;
window.requestAnimationFrame = function(callback){
var nowTime = Date.now();
var dely = Math.max(0,16.7 - (nowTime - lastTime));
lastTime = nowTime;
return setTimeout(callback,dely);
};
window.cancelAnimationFrame = function(index){
clearTimeout(index);
};
}
})();
var transformAttr = [
"rotate",
"rotateX",
"rotateY",
"rotateZ",
"translateX",
"translateY",
"translateZ",
"scale",
"scaleX",
"scaleY",
"skewX",
"skewY"
];
var normalAttr = [
"width",
"height",
"left",
"top",
"right",
"bottom",
"marginBottom",
"marginleft",
"marginRight",
"marginTop",
"paddingLeft",
"paddingRight",
"paddingTop",
"paddingBottom"
];
function css(el,attr,val){
if(typeof attr == "object"){
for(var s in attr){
css(el,s,attr[s]);
}
return ;
}
if(transformAttr.indexOf(attr) >= 0){
return setTransform(el,attr,val);
}
if(val === undefined){
val = getComputedStyle(el)[attr];
return normalAttr.indexOf(attr)>=0||!isNaN(val)?parseFloat(val):val;
} else {
if(attr == "opacity"){
el.style[attr] = val;
el.style.filter = "alpha(opacity="+(val*100)+")";
} else if(normalAttr.indexOf(attr)>=0) {
el.style[attr] = val + "px";
} else if(attr == "zIndex") {
el.style[attr] = Math.round(val);
} else {
el.style[attr] = val;
}
}
}
function setTransform(el,attr,val){
el.transform = el.transform||{};
if(val === undefined){
return el.transform[attr];
}
el.transform[attr] = val;
var transformVal = "";
for(var s in el.transform){
switch(s){
case "rotate":
case "rotateX":
case "rotateY":
case "rotateZ":
case "skewX":
case "skewY":
transformVal += s+'('+ el.transform[s]+'deg) ';
break;
case "translateX":
case "translateY":
case "translateZ":
transformVal += s+'('+ el.transform[s]+'px) ';
break;
case "scale":
case "scaleX":
case "scaleY":
transformVal += s+'('+ el.transform[s]+') ';
break;
}
}
el.style.WebkitTransform = el.style.transform = transformVal.trim();
}
function mTween(op){
var el = op.el,
attr = op.attr,
fx = op.fx||"easeOut",
duration = op.duration||400,
maxC = 0;
if(el.animationTimer){
return;
}
var t = 0;
var b = {};
var c = {};
for(var s in attr){
b[s] = css(el,s);
c[s] = attr[s] - b[s];
maxC = Math.max(maxC,Math.abs(c[s]));
}
if(typeof duration === "object"){
var durationOption = duration;
durationOption.multiple = durationOption.multiple||2;
duration = maxC * duration.multiple;
duration = durationOption.max?Math.min(duration,durationOption.max):duration;
duration = durationOption.min?Math.max(duration,durationOption.min):duration;
}
var d = Math.ceil(duration/(1000/60));
move();
function move(){
el.animationTimer = requestAnimationFrame(function(){
t++;
if(t > d){
el.animationTimer = null;
op.cb&&op.cb();
} else {
for(var s in attr){
var val = Tween[fx](t,b[s],c[s],d);
css(el,s,val);
}
move();
}
});
}
}
mTween.stop = function(el){
cancelAnimationFrame(el.animationTimer);
el.animationTimer = null;
};
function shake(op){
var el = op.el,
attr = op.attr,
shakeLength = op.shakeLength||15,
shakeArr = [];
el.shakeStart = {};
if(el.shake) {
return ;
}
if(typeof attr === "object" ){
for(var i = 0; i < attr.length; i++){
el.shakeStart[attr[i]] = css(el,attr[i]);
}
} else {
el.shakeStart[attr] = css(el,attr);
}
for(var i = shakeLength; i >= 0; i--){
shakeArr.push(i%2?i:-i);
}
move();
function move(){
el.shake = requestAnimationFrame(function(){
if(shakeArr.length <= 0){
el.shake = false;
op.cb&&op.cb();
} else {
var nub = shakeArr.shift();
for(var s in el.shakeStart){
css(el,s, el.shakeStart[s] + nub);
}
move();
}
});
}
}
shake.stop = function(el){
cancelAnimationFrame(el.shake);
el.shake = false;
for(var s in el.shakeStart){
css(el,s, el.shakeStart[s]);
}
};
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