jsdk-offical
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JSDK is the most comprehensive TypeScript framework, like JDK.
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text/typescript
/**
* @project JSDK
* @license MIT
* @website https://github.com/fengboyue/jsdk
*
* @version 2.7.0
* @update Add STEPS function
*
* @version 2.1.0
* @author Frank.Feng
*/
module JS {
export namespace an {
/**
* @param {number} t elapsed time
* @param {number} b begin
* @param {number} c increment = end - begin
* @param {number} d duration time
* @returns {number}
*/
export type EasingFunction = (t: number, b: number, c: number, d: number, ...args) => number;
const PI = Math.PI, pow = Math.pow, sqrt = Math.sqrt, abs = Math.abs, sin = Math.sin, cos = Math.cos, asin = Math.asin;
let minMax = (n:number, min, max) =>{
return Math.min(Math.max(n, min), max);
}
export class Easings {
/**
* Linear Function.
* 线性缓动函数
*/
static LINEAR:EasingFunction = function (t, b, c, d) {
return c * t / d + b
}
/**
* Quadratic ease-in.<br>
* 平方缓入
*/
static QUAD_IN:EasingFunction = function (t, b, c, d) {
return c * (t /= d) * t + b
}
/**
* Quadratic ease-in.<br>
* 平方缓出
*/
static QUAD_OUT:EasingFunction = function (t, b, c, d) {
return -c * (t /= d) * (t - 2) + b
}
/**
* Quadratic ease-in.<br>
* 平方缓入缓出
*/
static QUAD_IN_OUT:EasingFunction = function (t, b, c, d) {
if ((t /= d / 2) < 1) return c / 2 * t * t + b;
return -c / 2 * ((--t) * (t - 2) - 1) + b
}
/**
* Qubic ease-in.<br>
* 立方缓入
*/
static CUBIC_IN:EasingFunction = function (t, b, c, d) {
return c * (t /= d) * t * t + b
}
/**
* Qubic ease-out.<br>
* 立方缓出
*/
static CUBIC_OUT:EasingFunction = function (t, b, c, d) {
return c * ((t = t / d - 1) * t * t + 1) + b
}
/**
* Qubic ease-in-out.<br>
* 立方缓入缓出
*/
static CUBIC_IN_OUT:EasingFunction = function (t, b, c, d) {
if ((t /= d / 2) < 1) return c / 2 * t * t * t + b;
return c / 2 * ((t -= 2) * t * t + 2) + b
}
/**
* Quartic ease-in.<br>
* 四次方缓入
*/
static QUART_IN:EasingFunction = function (t, b, c, d) {
return c * (t /= d) * t * t * t + b
}
/**
* Quartic ease-out.<br>
* 四次方缓出
*/
static QUART_OUT:EasingFunction = function (t, b, c, d) {
return -c * ((t = t / d - 1) * t * t * t - 1) + b
}
/**
* Quartic ease-in-out.<br>
* 四次方缓入缓出
*/
static QUART_IN_OUT:EasingFunction = function (t, b, c, d) {
if ((t /= d / 2) < 1) return c / 2 * t * t * t * t + b;
return -c / 2 * ((t -= 2) * t * t * t - 2) + b
}
/**
* Quintic ease-in.<br>
* 五次方缓入
*/
static QUINT_IN:EasingFunction = function (t, b, c, d) {
return c * (t /= d) * t * t * t * t + b
}
/**
* Quintic ease-out.<br>
* 五次方缓出
*/
static QUINT_OUT:EasingFunction = function (t, b, c, d) {
return c * ((t = t / d - 1) * t * t * t * t + 1) + b
}
/**
* Quintic ease-out.<br>
* 五次方缓入缓出
*/
static QUINT_IN_OUT:EasingFunction = function (t, b, c, d) {
if ((t /= d / 2) < 1) return c / 2 * t * t * t * t * t + b;
return c / 2 * ((t -= 2) * t * t * t * t + 2) + b
}
/**
* Sinusoidal ease-in.<br>
* 正弦缓入
*/
static SINE_IN:EasingFunction = function (t, b, c, d) {
return -c * cos(t / d * (PI / 2)) + c + b
}
/**
* Sinusoidal ease-out.<br>
* 正弦缓出
*/
static SINE_OUT:EasingFunction = function (t, b, c, d) {
return c * sin(t / d * (PI / 2)) + b
}
/**
* Sinusoidal ease-in-out.<br>
* 正弦缓入缓出
*/
static SINE_IN_OUT:EasingFunction = function (t, b, c, d) {
return -c / 2 * (cos(PI * t / d) - 1) + b
}
/**
* Exponential ease-in.<br>
* 指数缓入
*/
static EXPO_IN:EasingFunction = function (t, b, c, d) {
return (t == 0) ? b : c * pow(2, 10 * (t / d - 1)) + b
}
/**
* Exponential ease-out.<br>
* 指数缓出
*/
static EXPO_OUT:EasingFunction = function (t, b, c, d) {
return (t == d) ? b + c : c * (-pow(2, -10 * t / d) + 1) + b
}
/**
* Exponential ease-in-out.<br>
* 指数缓入缓出
*/
static EXPO_IN_OUT:EasingFunction = function (t, b, c, d) {
if (t == 0) return b;
if (t == d) return b + c;
if ((t /= d / 2) < 1) return c / 2 * pow(2, 10 * (t - 1)) + b;
return c / 2 * (-pow(2, -10 * --t) + 2) + b
}
/**
* Circular ease-in.<br>
* 圆缓入
*/
static CIRC_IN:EasingFunction = function (t, b, c, d) {
return -c * (sqrt(1 - (t /= d) * t) - 1) + b
}
/**
* Circular ease-out.<br>
* 圆缓出
*/
static CIRC_OUT:EasingFunction = function (t, b, c, d) {
return c * sqrt(1 - (t = t / d - 1) * t) + b
}
/**
* Circular ease-in-out.<br>
* 圆缓入缓出
*/
static CIRC_IN_OUT:EasingFunction = function (t, b, c, d) {
if ((t /= d / 2) < 1) return -c / 2 * (sqrt(1 - t * t) - 1) + b;
return c / 2 * (sqrt(1 - (t -= 2) * t) + 1) + b
}
/**
* Elastic ease-in.<br>
* 伸缩缓入
*/
static ELASTIC_IN:EasingFunction = function (t, b, c, d) {
var s = 1.70158; var p = 0; var a = c;
if (t == 0) return b; if ((t /= d) == 1) return b + c; if (!p) p = d * .3;
if (a < abs(c)) { a = c; var s = p / 4; }
else var s = p / (2 * PI) * asin(c / a);
return -(a * pow(2, 10 * (t -= 1)) * sin((t * d - s) * (2 * PI) / p)) + b
}
/**
* Elastic ease-out.<br>
* 伸缩缓出
*/
static ELASTIC_OUT:EasingFunction = function (t, b, c, d) {
var s = 1.70158; var p = 0; var a = c;
if (t == 0) return b; if ((t /= d) == 1) return b + c; if (!p) p = d * .3;
if (a < abs(c)) { a = c; var s = p / 4; }
else var s = p / (2 * PI) * asin(c / a);
return a * pow(2, -10 * t) * sin((t * d - s) * (2 * PI) / p) + c + b
}
/**
* Elastic ease-in-out.<br>
* 伸缩缓入缓出
*/
static ELASTIC_IN_OUT:EasingFunction = function (t, b, c, d) {
var s = 1.70158; var p = 0; var a = c;
if (t == 0) return b; if ((t /= d / 2) == 2) return b + c; if (!p) p = d * (.3 * 1.5);
if (a < abs(c)) { a = c; var s = p / 4; }
else var s = p / (2 * PI) * asin(c / a);
if (t < 1) return -.5 * (a * pow(2, 10 * (t -= 1)) * sin((t * d - s) * (2 * PI) / p)) + b;
return a * pow(2, -10 * (t -= 1)) * sin((t * d - s) * (2 * PI) / p) * .5 + c + b
}
/**
* Back ease-in. <br>
* 后退缓入
*
* @param s 指定过冲量，此处数值越大，过冲越大。缺省为零.
*/
static BACK_IN:EasingFunction = function (t, b, c, d, s) {
if (s == undefined) s = 1.70158;
return c * (t /= d) * t * ((s + 1) * t - s) + b
}
/**
* Back ease-out. <br>
* 后退缓出
*
* @param s 指定过冲量，此处数值越大，过冲越大。缺省为零.
*/
static BACK_OUT:EasingFunction = function (t, b, c, d, s) {
if (s == undefined) s = 1.70158;
return c * ((t = t / d - 1) * t * ((s + 1) * t + s) + 1) + b
}
/**
* Back ease-in-out. <br>
* 后退缓入缓出
*
* @param s 指定过冲量，此处数值越大，过冲越大。缺省为零.
*/
static BACK_IN_OUT:EasingFunction = function (t, b, c, d, s) {
if (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
}
/**
* Bounce ease-in. <br>
* 弹跳缓入
*/
static BOUNCE_IN:EasingFunction = function (t, b, c, d) {
return c - Easings.BOUNCE_OUT(d - t, 0, c, d) + b
}
/**
* Bounce ease-out. <br>
* 弹跳缓出
*/
static BOUNCE_OUT:EasingFunction = function (t, b, c, d) {
const n1 = 2.75, n2 = 7.5625;
if ((t /= d) < (1 / n1)) {
return c * (n2 * t * t) + b;
} else if (t < (2 / n1)) {
return c * (n2 * (t -= (1.5 / n1)) * t + .75) + b;
} else if (t < (2.5 / 2.75)) {
return c * (n2 * (t -= (2.25 / n1)) * t + .9375) + b;
} else {
return c * (n2 * (t -= (2.625 / n1)) * t + .984375) + b
}
}
/**
* Bounce ease-in-out. <br>
* 弹跳缓入缓出
*/
static BOUNCE_IN_OUT:EasingFunction = function (t, b, c, d) {
if (t < d / 2) return Easings.BOUNCE_IN(t * 2, 0, c, d) * .5 + b;
return Easings.BOUNCE_OUT(t * 2 - d, 0, c, d) * .5 + c * .5 + b
}
static STEPS: EasingFunction = function (t, b, c, d, steps) {
steps = steps == void 0?10:(steps<1?1:steps);
let m = Math.ceil((minMax(t/d, 0.000001, 1)) * steps) * (1 / steps);
return b+c*m
};
}
}
}
import EasingFunction = JS.an.EasingFunction;
import Easings = JS.an.Easings;