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gre/easing.js

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Simple Easing Functions in Javascript - see https://github.com/gre/bezier-easing
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 /* * This work is free. You can redistribute it and/or modify it under the * terms of the Do What The Fuck You Want To Public License, Version 2, * as published by Sam Hocevar. See the COPYING file for more details. */ /* * Easing Functions - inspired from http://gizma.com/easing/ * only considering the t value for the range [0, 1] => [0, 1] */ EasingFunctions = { // no easing, no acceleration linear: t => t, // accelerating from zero velocity easeInQuad: t => t*t, // decelerating to zero velocity easeOutQuad: t => t*(2-t), // acceleration until halfway, then deceleration easeInOutQuad: t => t<.5 ? 2*t*t : -1+(4-2*t)*t, // accelerating from zero velocity easeInCubic: t => t*t*t, // decelerating to zero velocity easeOutCubic: t => (--t)*t*t+1, // acceleration until halfway, then deceleration easeInOutCubic: t => t<.5 ? 4*t*t*t : (t-1)*(2*t-2)*(2*t-2)+1, // accelerating from zero velocity easeInQuart: t => t*t*t*t, // decelerating to zero velocity easeOutQuart: t => 1-(--t)*t*t*t, // acceleration until halfway, then deceleration easeInOutQuart: t => t<.5 ? 8*t*t*t*t : 1-8*(--t)*t*t*t, // accelerating from zero velocity easeInQuint: t => t*t*t*t*t, // decelerating to zero velocity easeOutQuint: t => 1+(--t)*t*t*t*t, // acceleration until halfway, then deceleration easeInOutQuint: t => t<.5 ? 16*t*t*t*t*t : 1+16*(--t)*t*t*t*t }

ghost commented Nov 24, 2021

An alternative (works somehow)

`eval(function(p,a,c,k,e,d){e=function(c){return c.toString(36)};if(!''.replace(/^/,String)){while(c--){d[c.toString(a)]=k[c]||c.toString(a)}k=[function(e){return d[e]}];e=function(){return'\\w+'};c=1};while(c--){if(k[c]){p=p.replace(new RegExp('\\b'+e(c)+'\\b','g'),k[c])}}return p}('f d={c:3(n){0 n},g:3(n){0 n*n},a:3(n){0 n*(2-n)},7:3(n){0 n<.5?2*n*n:(4-2*n)*n-1},9:3(n){0 n*n*n},b:3(n){0--n*n*n+1},e:3(n){0 n<.5?4*n*n*n:(n-1)*(2*n-2)*(2*n-2)+1},k:3(n){0 n*n*n*n},h:3(n){0 1- --n*n*n*n},i:3(n){0 n<.5?8*n*n*n*n:1-8*--n*n*n*n},l:3(n){0 n*n*n*n*n},j:3(n){0 1+--n*n*n*n*n},m:3(n){0 n<.5?6*n*n*n*n*n:1+6*--n*n*n*n*n}};',24,24,'return|||function|||16|easeInOutQuad||easeInCubic|easeOutQuad|easeOutCubic|linear|EasingFunctions|easeInOutCubic|var|easeInQuad|easeOutQuart|easeInOutQuart|easeOutQuint|easeInQuart|easeInQuint|easeInOutQuint|'.split('|'),0,{}))`

visual cheat sheet https://easings.net/

phil-green-CTI commented Feb 28, 2023

This is really good but the easing functions are causing me trouble. I would like the first 75% of the count to go very quickly, and then decelerate to a crawl. I what would the proper function be for this? I imagine something like:

`const easeOut = t<.75 ? t => t : [SOMETHING] ;`

but I don't know what to put there.