130 lines
3.1 KiB
JavaScript
130 lines
3.1 KiB
JavaScript
/*jQ easying 运动函数 扩展*/
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$.extend(jQuery.easing,{
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easeIn: function(x,t, b, c, d){ //加速曲线
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return c*(t/=d)*t + b;
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},
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easeOut: function(x,t, b, c, d){ //减速曲线
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return -c *(t/=d)*(t-2) + b;
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},
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easeBoth: function(x,t, b, c, d){ //加速减速曲线
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if ((t/=d/2) < 1) {
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return c/2*t*t + b;
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}
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return -c/2 * ((--t)*(t-2) - 1) + b;
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},
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easeInStrong: function(x,t, b, c, d){ //加加速曲线
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return c*(t/=d)*t*t*t + b;
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},
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easeOutStrong: function(x,t, b, c, d){ //减减速曲线
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return -c * ((t=t/d-1)*t*t*t - 1) + b;
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},
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easeBothStrong: function(x,t, b, c, d){ //加加速减减速曲线
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if ((t/=d/2) < 1) {
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return c/2*t*t*t*t + b;
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}
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return -c/2 * ((t-=2)*t*t*t - 2) + b;
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},
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elasticIn: function(x,t, b, c, d, a, p){ //正弦衰减曲线（弹动渐入）
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if (t === 0) {
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return b;
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}
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if ( (t /= d) == 1 ) {
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return b+c;
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}
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if (!p) {
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p=d*0.3;
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}
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if (!a || a < Math.abs(c)) {
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a = c;
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var s = p/4;
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} else {
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var s = p/(2*Math.PI) * Math.asin (c/a);
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}
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return -(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
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},
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elasticOut: function(x,t, b, c, d, a, p){ //正弦增强曲线（弹动渐出）
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if (t === 0) {
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return b;
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}
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if ( (t /= d) == 1 ) {
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return b+c;
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}
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if (!p) {
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p=d*0.3;
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}
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if (!a || a < Math.abs(c)) {
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a = c;
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var s = p / 4;
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} else {
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var s = p/(2*Math.PI) * Math.asin (c/a);
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}
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return a*Math.pow(2,-10*t) * Math.sin( (t*d-s)*(2*Math.PI)/p ) + c + b;
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},
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elasticBoth: function(x,t, b, c, d, a, p){
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if (t === 0) {
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return b;
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}
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if ( (t /= d/2) == 2 ) {
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return b+c;
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}
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if (!p) {
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p = d*(0.3*1.5);
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}
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if ( !a || a < Math.abs(c) ) {
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a = c;
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var s = p/4;
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}
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else {
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var s = p/(2*Math.PI) * Math.asin (c/a);
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}
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if (t < 1) {
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return - 0.5*(a*Math.pow(2,10*(t-=1)) *
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Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
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}
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return a*Math.pow(2,-10*(t-=1)) *
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Math.sin( (t*d-s)*(2*Math.PI)/p )*0.5 + c + b;
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},
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backIn: function(x,t, b, c, d, s){ //回退加速（回退渐入）
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if (typeof s == 'undefined') {
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s = 1.70158;
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}
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return c*(t/=d)*t*((s+1)*t - s) + b;
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},
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backOut: function(x,t, b, c, d, s){
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if (typeof s == 'undefined') {
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s = 3.70158; //回缩的距离
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}
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return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;
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},
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backBoth: function(x,t, b, c, d, s){
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if (typeof s == 'undefined') {
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s = 1.70158;
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}
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if ((t /= d/2 ) < 1) {
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return c/2*(t*t*(((s*=(1.525))+1)*t - s)) + b;
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}
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return c/2*((t-=2)*t*(((s*=(1.525))+1)*t + s) + 2) + b;
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},
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bounceIn: function(x,t, b, c, d){ //弹球减振（弹球渐出）
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return c - this['bounceOut'](x,d-t, 0, c, d) + b;
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},
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bounceOut: function(x,t, b, c, d){
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if ((t/=d) < (1/2.75)) {
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return c*(7.5625*t*t) + b;
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} else if (t < (2/2.75)) {
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return c*(7.5625*(t-=(1.5/2.75))*t + 0.75) + b;
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} else if (t < (2.5/2.75)) {
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return c*(7.5625*(t-=(2.25/2.75))*t + 0.9375) + b;
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}
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return c*(7.5625*(t-=(2.625/2.75))*t + 0.984375) + b;
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},
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bounceBoth: function(x,t, b, c, d){
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if (t < d/2) {
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return this['bounceIn'](x,t*2, 0, c, d) * 0.5 + b;
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}
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return this['bounceOut'](x,t*2-d, 0, c, d) * 0.5 + c*0.5 + b;
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}
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}); |