This is a grab-bag of Robert Penner's easing equations, most of the code from glsl-easings. Pull requests for optimizations are welcome.
Full list of eases:
import { backInOut } from '@gamestdio/easing';
import { backIn } from '@gamestdio/easing';
import { backOut } from '@gamestdio/easing';
import { bounceInOut } from '@gamestdio/easing';
import { bounceIn } from '@gamestdio/easing';
import { bounceOut } from '@gamestdio/easing';
import { circInOut } from '@gamestdio/easing';
import { circIn } from '@gamestdio/easing';
import { circOut } from '@gamestdio/easing';
import { cubicInOut } from '@gamestdio/easing';
import { cubicIn } from '@gamestdio/easing';
import { cubicOut } from '@gamestdio/easing';
import { elasticInOut } from '@gamestdio/easing';
import { elasticIn } from '@gamestdio/easing';
import { elasticOut } from '@gamestdio/easing';
import { expoInOut } from '@gamestdio/easing';
import { expoIn } from '@gamestdio/easing';
import { expoOut } from '@gamestdio/easing';
import { linear } from '@gamestdio/easing';
import { quadInOut } from '@gamestdio/easing';
import { quadIn } from '@gamestdio/easing';
import { quadOut } from '@gamestdio/easing';
import { quartInOut } from '@gamestdio/easing';
import { quartIn } from '@gamestdio/easing';
import { quartOut } from '@gamestdio/easing';
import { quintInOut } from '@gamestdio/easing';
import { quintIn } from '@gamestdio/easing';
import { quintOut } from '@gamestdio/easing';
import { sineInOut } from '@gamestdio/easing';
import { sineIn } from '@gamestdio/easing';
import { sineOut } from '@gamestdio/easing';All easing functions only remap a time value, and all have the same signature.
Where t is typically a value between 0 and 1, and it returns a new float that has been eased.
MIT, see LICENSE.md for details.