Easing 缓动函数收集
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Easing 缓动函数收集
之前收集了不少链接，结果久了都404了。还是得复制一份代码过来才放心。
缓动函数
ECharts图表
const easingFuncs = {
linear: function (k) {
return k;
},
quadraticIn: function (k) {
return k * k;
},
quadraticOut: function (k) {
return k * (2 - k);
},
quadraticInOut: function (k) {
if ((k *= 2) < 1) {
return 0.5 * k * k;
}
return -0.5 * (--k * (k - 2) - 1);
},
cubicIn: function (k) {
return k * k * k;
},
cubicOut: function (k) {
return --k * k * k + 1;
},
cubicInOut: function (k) {
if ((k *= 2) < 1) {
return 0.5 * k * k * k;
}
return 0.5 * ((k -= 2) * k * k + 2);
},
quarticIn: function (k) {
return k * k * k * k;
},
quarticOut: function (k) {
return 1 - --k * k * k * k;
},
quarticInOut: function (k) {
if ((k *= 2) < 1) {
return 0.5 * k * k * k * k;
}
return -0.5 * ((k -= 2) * k * k * k - 2);
},
quinticIn: function (k) {
return k * k * k * k * k;
},
quinticOut: function (k) {
return --k * k * k * k * k + 1;
},
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);
},
sinusoidalIn: function (k) {
return 1 - Math.cos((k * Math.PI) / 2);
},
sinusoidalOut: function (k) {
return Math.sin((k * Math.PI) / 2);
},
sinusoidalInOut: function (k) {
return 0.5 * (1 - Math.cos(Math.PI * k));
},
exponentialIn: function (k) {
return k === 0 ? 0 : Math.pow(1024, k - 1);
},
exponentialOut: function (k) {
return k === 1 ? 1 : 1 - Math.pow(2, -10 * k);
},
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);
},
circularIn: function (k) {
return 1 - Math.sqrt(1 - k * k);
},
circularOut: function (k) {
return Math.sqrt(1 - --k * k);
},
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);
},
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)
);
},
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
);
},
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
backIn: function (k) {
var s = 1.70158;
return k * k * ((s + 1) * k - s);
},
backOut: function (k) {
var s = 1.70158;
return --k * k * ((s + 1) * k + s) + 1;
},
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
bounceIn: function (k) {
return 1 - easingFuncs.bounceOut(1 - k);
},
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;
}
},
bounceInOut: function (k) {
if (k < 0.5) {
return easingFuncs.bounceIn(k * 2) * 0.5;
}
return easingFuncs.bounceOut(k * 2 - 1) * 0.5 + 0.5;
}
};
const N_POINT = 30;
const grids = [];
const xAxes = [];
const yAxes = [];
const series = [];
const titles = [];
let count = 0;
Object.keys(easingFuncs).forEach(function (easingName) {
var easingFunc = easingFuncs[easingName];
var data = [];
for (var i = 0; i <= N_POINT; i++) {
var x = i / N_POINT;
var y = easingFunc(x);
data.push([x, y]);
}
grids.push({
show: true,
borderWidth: 0,
shadowColor: 'rgba(0, 0, 0, 0.3)',
shadowBlur: 2
});
xAxes.push({
type: 'value',
show: false,
min: 0,
max: 1,
gridIndex: count
});
yAxes.push({
type: 'value',
show: false,
min: -0.4,
max: 1.4,
gridIndex: count
});
series.push({
name: easingName,
type: 'line',
xAxisIndex: count,
yAxisIndex: count,
data: data,
showSymbol: false,
animationEasing: easingName,
animationDuration: 1000
});
titles.push({
textAlign: 'center',
text: easingName,
textStyle: {
fontSize: 12,
fontWeight: 'normal'
}
});
count++;
});
var rowNumber = Math.ceil(Math.sqrt(count));
grids.forEach(function (grid, idx) {
grid.left = ((idx % rowNumber) / rowNumber) * 100 + 0.5 + '%';
grid.top = (Math.floor(idx / rowNumber) / rowNumber) * 100 + 0.5 + '%';
grid.width = (1 / rowNumber) * 100 - 1 + '%';
grid.height = (1 / rowNumber) * 100 - 1 + '%';
titles[idx].left = parseFloat(grid.left) + parseFloat(grid.width) / 2 + '%';
titlesjavascript Javascript中的简单缓动函数 - 请参阅https://github.com/gre/bezier-easing
将 jQuery 缓动 easeInExpo 函数重写为普通的 javascript 和 css
csharp Robert Penner的缓动方程，来源：http：//robertpenner.com/easing/,C＃作者：Darren David，原作者保留所有权利