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META-INF.assets.rjzjh.zrender.animation.easing.js Maven / Gradle / Ivy
/**
* 缓动代码来自 https://github.com/sole/tween.js/blob/master/src/Tween.js
* @see http://sole.github.io/tween.js/examples/03_graphs.html
* @exports zrender/animation/easing
*/
define(function () {
var easing = {
/**
* @param {number} k
* @return {number}
*/
linear: function (k) {
return k;
},
/**
* @param {number} k
* @return {number}
*/
quadraticIn: function (k) {
return k * k;
},
/**
* @param {number} k
* @return {number}
*/
quadraticOut: function (k) {
return k * (2 - k);
},
/**
* @param {number} k
* @return {number}
*/
quadraticInOut: function (k) {
if ((k *= 2) < 1) {
return 0.5 * k * k;
}
return -0.5 * (--k * (k - 2) - 1);
},
// 三次方的缓动（t^3）
/**
* @param {number} k
* @return {number}
*/
cubicIn: function (k) {
return k * k * k;
},
/**
* @param {number} k
* @return {number}
*/
cubicOut: function (k) {
return --k * k * k + 1;
},
/**
* @param {number} k
* @return {number}
*/
cubicInOut: function (k) {
if ((k *= 2) < 1) {
return 0.5 * k * k * k;
}
return 0.5 * ((k -= 2) * k * k + 2);
},
// 四次方的缓动（t^4）
/**
* @param {number} k
* @return {number}
*/
quarticIn: function (k) {
return k * k * k * k;
},
/**
* @param {number} k
* @return {number}
*/
quarticOut: function (k) {
return 1 - (--k * k * k * k);
},
/**
* @param {number} k
* @return {number}
*/
quarticInOut: function (k) {
if ((k *= 2) < 1) {
return 0.5 * k * k * k * k;
}
return -0.5 * ((k -= 2) * k * k * k - 2);
},
// 五次方的缓动（t^5）
/**
* @param {number} k
* @return {number}
*/
quinticIn: function (k) {
return k * k * k * k * k;
},
/**
* @param {number} k
* @return {number}
*/
quinticOut: function (k) {
return --k * k * k * k * k + 1;
},
/**
* @param {number} k
* @return {number}
*/
quinticInOut: function (k) {
if ((k *= 2) < 1) {
return 0.5 * k * k * k * k * k;
}
return 0.5 * ((k -= 2) * k * k * k * k + 2);
},
// 正弦曲线的缓动（sin(t)）
/**
* @param {number} k
* @return {number}
*/
sinusoidalIn: function (k) {
return 1 - Math.cos(k * Math.PI / 2);
},
/**
* @param {number} k
* @return {number}
*/
sinusoidalOut: function (k) {
return Math.sin(k * Math.PI / 2);
},
/**
* @param {number} k
* @return {number}
*/
sinusoidalInOut: function (k) {
return 0.5 * (1 - Math.cos(Math.PI * k));
},
// 指数曲线的缓动（2^t）
/**
* @param {number} k
* @return {number}
*/
exponentialIn: function (k) {
return k === 0 ? 0 : Math.pow(1024, k - 1);
},
/**
* @param {number} k
* @return {number}
*/
exponentialOut: function (k) {
return k === 1 ? 1 : 1 - Math.pow(2, -10 * k);
},
/**
* @param {number} k
* @return {number}
*/
exponentialInOut: function (k) {
if (k === 0) {
return 0;
}
if (k === 1) {
return 1;
}
if ((k *= 2) < 1) {
return 0.5 * Math.pow(1024, k - 1);
}
return 0.5 * (-Math.pow(2, -10 * (k - 1)) + 2);
},
// 圆形曲线的缓动（sqrt(1-t^2)）
/**
* @param {number} k
* @return {number}
*/
circularIn: function (k) {
return 1 - Math.sqrt(1 - k * k);
},
/**
* @param {number} k
* @return {number}
*/
circularOut: function (k) {
return Math.sqrt(1 - (--k * k));
},
/**
* @param {number} k
* @return {number}
*/
circularInOut: function (k) {
if ((k *= 2) < 1) {
return -0.5 * (Math.sqrt(1 - k * k) - 1);
}
return 0.5 * (Math.sqrt(1 - (k -= 2) * k) + 1);
},
// 创建类似于弹簧在停止前来回振荡的动画
/**
* @param {number} k
* @return {number}
*/
elasticIn: function (k) {
var s;
var a = 0.1;
var p = 0.4;
if (k === 0) {
return 0;
}
if (k === 1) {
return 1;
}
if (!a || a < 1) {
a = 1; s = p / 4;
}
else {
s = p * Math.asin(1 / a) / (2 * Math.PI);
}
return -(a * Math.pow(2, 10 * (k -= 1)) *
Math.sin((k - s) * (2 * Math.PI) / p));
},
/**
* @param {number} k
* @return {number}
*/
elasticOut: function (k) {
var s;
var a = 0.1;
var p = 0.4;
if (k === 0) {
return 0;
}
if (k === 1) {
return 1;
}
if (!a || a < 1) {
a = 1; s = p / 4;
}
else {
s = p * Math.asin(1 / a) / (2 * Math.PI);
}
return (a * Math.pow(2, -10 * k) *
Math.sin((k - s) * (2 * Math.PI) / p) + 1);
},
/**
* @param {number} k
* @return {number}
*/
elasticInOut: function (k) {
var s;
var a = 0.1;
var p = 0.4;
if (k === 0) {
return 0;
}
if (k === 1) {
return 1;
}
if (!a || a < 1) {
a = 1; s = p / 4;
}
else {
s = p * Math.asin(1 / a) / (2 * Math.PI);
}
if ((k *= 2) < 1) {
return -0.5 * (a * Math.pow(2, 10 * (k -= 1))
* Math.sin((k - s) * (2 * Math.PI) / p));
}
return a * Math.pow(2, -10 * (k -= 1))
* Math.sin((k - s) * (2 * Math.PI) / p) * 0.5 + 1;
},
// 在某一动画开始沿指示的路径进行动画处理前稍稍收回该动画的移动
/**
* @param {number} k
* @return {number}
*/
backIn: function (k) {
var s = 1.70158;
return k * k * ((s + 1) * k - s);
},
/**
* @param {number} k
* @return {number}
*/
backOut: function (k) {
var s = 1.70158;
return --k * k * ((s + 1) * k + s) + 1;
},
/**
* @param {number} k
* @return {number}
*/
backInOut: function (k) {
var s = 1.70158 * 1.525;
if ((k *= 2) < 1) {
return 0.5 * (k * k * ((s + 1) * k - s));
}
return 0.5 * ((k -= 2) * k * ((s + 1) * k + s) + 2);
},
// 创建弹跳效果
/**
* @param {number} k
* @return {number}
*/
bounceIn: function (k) {
return 1 - easing.bounceOut(1 - k);
},
/**
* @param {number} k
* @return {number}
*/
bounceOut: function (k) {
if (k < (1 / 2.75)) {
return 7.5625 * k * k;
}
else if (k < (2 / 2.75)) {
return 7.5625 * (k -= (1.5 / 2.75)) * k + 0.75;
}
else if (k < (2.5 / 2.75)) {
return 7.5625 * (k -= (2.25 / 2.75)) * k + 0.9375;
}
else {
return 7.5625 * (k -= (2.625 / 2.75)) * k + 0.984375;
}
},
/**
* @param {number} k
* @return {number}
*/
bounceInOut: function (k) {
if (k < 0.5) {
return easing.bounceIn(k * 2) * 0.5;
}
return easing.bounceOut(k * 2 - 1) * 0.5 + 0.5;
}
};
return easing;
});
