mirror of
https://github.com/Hopiu/fabric.js.git
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331 lines
7.5 KiB
JavaScript
331 lines
7.5 KiB
JavaScript
(function() {
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/**
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* Quadratic easing in
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* @memberOf fabric.util.ease
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*/
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function easeInQuad(t, b, c, d) {
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return c*(t/=d)*t + b;
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}
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/**
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* Quadratic easing out
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* @memberOf fabric.util.ease
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*/
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function easeOutQuad(t, b, c, d) {
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return -c *(t/=d)*(t-2) + b;
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}
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/**
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* Quadratic easing in and out
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* @memberOf fabric.util.ease
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*/
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function easeInOutQuad(t, b, c, d) {
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t /= (d/2);
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if (t < 1) return c/2*t*t + b;
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return -c/2 * ((--t)*(t-2) - 1) + b;
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}
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/**
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* Cubic easing in
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* @memberOf fabric.util.ease
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*/
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function easeInCubic(t, b, c, d) {
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return c*(t/=d)*t*t + b;
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}
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/**
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* Cubic easing out
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* @memberOf fabric.util.ease
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*/
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function easeOutCubic(t, b, c, d) {
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return c*((t=t/d-1)*t*t + 1) + b;
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}
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/**
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* Cubic easing in and out
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* @memberOf fabric.util.ease
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*/
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function easeInOutCubic(t, b, c, d) {
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t /= d/2;
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if (t < 1) return c/2*t*t*t + b;
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return c/2*((t-=2)*t*t + 2) + b;
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}
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/**
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* Quartic easing in
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* @memberOf fabric.util.ease
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*/
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function easeInQuart(t, b, c, d) {
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return c*(t/=d)*t*t*t + b;
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}
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/**
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* Quartic easing out
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* @memberOf fabric.util.ease
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*/
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function easeOutQuart(t, b, c, d) {
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return -c * ((t=t/d-1)*t*t*t - 1) + b;
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}
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/**
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* Quartic easing in and out
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* @memberOf fabric.util.ease
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*/
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function easeInOutQuart(t, b, c, d) {
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t /= d/2;
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if (t < 1) return c/2*t*t*t*t + b;
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return -c/2 * ((t-=2)*t*t*t - 2) + b;
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}
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/**
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* Quintic easing in
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* @memberOf fabric.util.ease
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*/
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function easeInQuint(t, b, c, d) {
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return c*(t/=d)*t*t*t*t + b;
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}
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/**
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* Quintic easing out
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* @memberOf fabric.util.ease
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*/
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function easeOutQuint(t, b, c, d) {
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return c*((t=t/d-1)*t*t*t*t + 1) + b;
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}
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/**
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* Quintic easing in and out
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* @memberOf fabric.util.ease
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*/
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function easeInOutQuint(t, b, c, d) {
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t /= d/2;
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if (t < 1) return c/2*t*t*t*t*t + b;
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return c/2*((t-=2)*t*t*t*t + 2) + b;
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}
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/**
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* Sinusoidal easing in
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* @memberOf fabric.util.ease
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*/
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function easeInSine(t, b, c, d) {
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return -c * Math.cos(t/d * (Math.PI/2)) + c + b;
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}
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/**
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* Sinusoidal easing out
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* @memberOf fabric.util.ease
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*/
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function easeOutSine(t, b, c, d) {
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return c * Math.sin(t/d * (Math.PI/2)) + b;
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}
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/**
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* Sinusoidal easing in and out
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* @memberOf fabric.util.ease
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*/
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function easeInOutSine(t, b, c, d) {
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return -c/2 * (Math.cos(Math.PI*t/d) - 1) + b;
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}
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/**
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* Exponential easing in
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* @memberOf fabric.util.ease
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*/
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function easeInExpo(t, b, c, d) {
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return (t===0) ? b : c * Math.pow(2, 10 * (t/d - 1)) + b;
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}
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/**
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* Exponential easing out
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* @memberOf fabric.util.ease
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*/
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function easeOutExpo(t, b, c, d) {
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return (t===d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b;
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}
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/**
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* Exponential easing in and out
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* @memberOf fabric.util.ease
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*/
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function easeInOutExpo(t, b, c, d) {
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if (t===0) return b;
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if (t===d) return b+c;
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t /= d/2;
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if (t < 1) return c/2 * Math.pow(2, 10 * (t - 1)) + b;
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return c/2 * (-Math.pow(2, -10 * --t) + 2) + b;
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}
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/**
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* Circular easing in
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* @memberOf fabric.util.ease
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*/
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function easeInCirc(t, b, c, d) {
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return -c * (Math.sqrt(1 - (t/=d)*t) - 1) + b;
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}
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/**
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* Circular easing out
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* @memberOf fabric.util.ease
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*/
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function easeOutCirc(t, b, c, d) {
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return c * Math.sqrt(1 - (t=t/d-1)*t) + b;
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}
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/**
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* Circular easing in and out
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* @memberOf fabric.util.ease
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*/
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function easeInOutCirc(t, b, c, d) {
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t /= d/2;
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if (t < 1) return -c/2 * (Math.sqrt(1 - t*t) - 1) + b;
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return c/2 * (Math.sqrt(1 - (t-=2)*t) + 1) + b;
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}
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/**
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* Elastic easing in
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* @memberOf fabric.util.ease
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*/
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function easeInElastic(t, b, c, d) {
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var s=1.70158;var p=0;var a=c;
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if (t===0) return b;
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t /= d;
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if (t===1) return b+c;
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if (!p) p=d*0.3;
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if (a < Math.abs(c)) { a=c; s=p/4; }
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else s = p/(2*Math.PI) * Math.asin (c/a);
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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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/**
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* Elastic easing out
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* @memberOf fabric.util.ease
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*/
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function easeOutElastic(t, b, c, d) {
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var s=1.70158;var p=0;var a=c;
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if (t===0) return b;
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t /= d;
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if (t===1) return b+c;
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if (!p) p=d*0.3;
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if (a < Math.abs(c)) { a=c; s=p/4; }
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else s = p/(2*Math.PI) * Math.asin (c/a);
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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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/**
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* Elastic easing in and out
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* @memberOf fabric.util.ease
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*/
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function easeInOutElastic(t, b, c, d) {
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var s=1.70158;var p=0;var a=c;
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if (t===0) return b;
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t /= d/2;
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if (t===2) return b+c;
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if (!p) p=d*(0.3*1.5);
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if (a < Math.abs(c)) { a=c; s=p/4; }
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else s = p/(2*Math.PI) * Math.asin (c/a);
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if (t < 1) return -0.5*(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
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return a*Math.pow(2,-10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )*0.5 + c + b;
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}
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/**
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* Backwards easing in
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* @memberOf fabric.util.ease
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*/
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function easeInBack(t, b, c, d, s) {
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if (s === undefined) s = 1.70158;
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return c*(t/=d)*t*((s+1)*t - s) + b;
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}
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/**
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* Backwards easing out
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* @memberOf fabric.util.ease
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*/
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function easeOutBack(t, b, c, d, s) {
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if (s === undefined) s = 1.70158;
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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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/**
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* Backwards easing in and out
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* @memberOf fabric.util.ease
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*/
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function easeInOutBack(t, b, c, d, s) {
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if (s === undefined) s = 1.70158;
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t /= d/2;
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if (t < 1) return c/2*(t*t*(((s*=(1.525))+1)*t - s)) + b;
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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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/**
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* Bouncing easing in
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* @memberOf fabric.util.ease
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*/
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function easeInBounce(t, b, c, d) {
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return c - easeOutBounce (d-t, 0, c, d) + b;
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}
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/**
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* Bouncing easing out
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* @memberOf fabric.util.ease
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*/
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function easeOutBounce(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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} else {
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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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}
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/**
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* Bouncing easing in and out
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* @memberOf fabric.util.ease
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*/
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function easeInOutBounce(t, b, c, d) {
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if (t < d/2) return easeInBounce (t*2, 0, c, d) * 0.5 + b;
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return easeOutBounce (t*2-d, 0, c, d) * 0.5 + c*0.5 + b;
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}
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/**
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* Easing functions
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* See <a href="http://gizma.com/easing/">Easing Equations by Robert Penner</a>
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* @namespace fabric.util.ease
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*/
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fabric.util.ease = {
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easeInQuad: easeInQuad,
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easeOutQuad: easeOutQuad,
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easeInOutQuad: easeInOutQuad,
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easeInCubic: easeInCubic,
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easeOutCubic: easeOutCubic,
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easeInOutCubic: easeInOutCubic,
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easeInQuart: easeInQuart,
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easeOutQuart: easeOutQuart,
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easeInOutQuart: easeInOutQuart,
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easeInQuint: easeInQuint,
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easeOutQuint: easeOutQuint,
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easeInOutQuint: easeInOutQuint,
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easeInSine: easeInSine,
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easeOutSine: easeOutSine,
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easeInOutSine: easeInOutSine,
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easeInExpo: easeInExpo,
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easeOutExpo: easeOutExpo,
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easeInOutExpo: easeInOutExpo,
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easeInCirc: easeInCirc,
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easeOutCirc: easeOutCirc,
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easeInOutCirc: easeInOutCirc,
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easeInElastic: easeInElastic,
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easeOutElastic: easeOutElastic,
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easeInOutElastic: easeInOutElastic,
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easeInBack: easeInBack,
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easeOutBack: easeOutBack,
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easeInOutBack: easeInOutBack,
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easeInBounce: easeInBounce,
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easeOutBounce: easeOutBounce,
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easeInOutBounce: easeInOutBounce
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};
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}());
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