Giter VIP home page Giter VIP logo

eases's Introduction

eases

stable

This is a grab-bag of Robert Penner's easing equations, most of the code from glsl-easings. Pull requests for optimizations are welcome.

//require all eases
var quadIn = require('eases').quadIn

//require only the single function
var quadIn = require('eases/quad-in')

Usage

NPM

Each easing has its own file which can be required individually. The entry point also exports all eases with camelCase, so require('eases/expo-in-out') becomes require('eases').expoInOut.

Full list of eases:

require('eases/back-in-out')
require('eases/back-in')
require('eases/back-out')
require('eases/bounce-in-out')
require('eases/bounce-in')
require('eases/bounce-out')
require('eases/circ-in-out')
require('eases/circ-in')
require('eases/circ-out')
require('eases/cubic-in-out')
require('eases/cubic-in')
require('eases/cubic-out')
require('eases/elastic-in-out')
require('eases/elastic-in')
require('eases/elastic-out')
require('eases/expo-in-out')
require('eases/expo-in')
require('eases/expo-out')
require('eases/linear')
require('eases/quad-in-out')
require('eases/quad-in')
require('eases/quad-out')
require('eases/quart-in-out')
require('eases/quart-in')
require('eases/quart-out')
require('eases/quint-in-out')
require('eases/quint-in')
require('eases/quint-out')
require('eases/sine-in-out')
require('eases/sine-in')
require('eases/sine-out')

All easing functions only remap a time value, and all have the same signature.

v = ease(t)

Where t is typically a value between 0 and 1, and it returns a new float that has been eased.

License

MIT, see LICENSE.md for details.

eases's People

Contributors

mattdesl avatar mikkoh avatar

Stargazers

 avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar

Watchers

 avatar  avatar  avatar  avatar  avatar  avatar  avatar  avatar

eases's Issues

back-out is elastic

I can't confirm 100% but it looks like back-out.js might be doing an elastic ease instead.

expoOut glitch

The expoOut function is meant to serve as an ease to gradually go from 0 to 1. I noted a glitch. When going from 0.0 to 1.0 in steps of 0.01, the last few values are as follows:

input: output:

0.96 0.9987114180558858
0.97 0.9987977105338428
0.98 0.9988782242626982
0.99 0.9989533462279919
1 1 
Diff from 0.98 to 0.99: 0.00007512196529368964
Diff from 0.99 to 1.00:  0.001046653772008077

As you can see, the diff 0.99 to 1.00 is substantually bigger than the diff from 0.98 to 0.99. In animations, this causes excactly what you try to prevent!

Looking at the code:

function expoOut(t) {
  return t === 1.0 ? t : 1.0 - Math.pow(2.0, -10.0 * t)
}

Returning 1.0 when t === 1.0 is WRONG in my opinion.

Agree?

Recommend Projects

  • React photo React

    A declarative, efficient, and flexible JavaScript library for building user interfaces.

  • Vue.js photo Vue.js

    ๐Ÿ–– Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.

  • Typescript photo Typescript

    TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

  • TensorFlow photo TensorFlow

    An Open Source Machine Learning Framework for Everyone

  • Django photo Django

    The Web framework for perfectionists with deadlines.

  • D3 photo D3

    Bring data to life with SVG, Canvas and HTML. ๐Ÿ“Š๐Ÿ“ˆ๐ŸŽ‰

Recommend Topics

  • javascript

    JavaScript (JS) is a lightweight interpreted programming language with first-class functions.

  • web

    Some thing interesting about web. New door for the world.

  • server

    A server is a program made to process requests and deliver data to clients.

  • Machine learning

    Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.

  • Game

    Some thing interesting about game, make everyone happy.

Recommend Org

  • Facebook photo Facebook

    We are working to build community through open source technology. NB: members must have two-factor auth.

  • Microsoft photo Microsoft

    Open source projects and samples from Microsoft.

  • Google photo Google

    Google โค๏ธ Open Source for everyone.

  • D3 photo D3

    Data-Driven Documents codes.