tweenjs/tween.js

Help add new easing functions

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#507 opened on Nov 6, 2019

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Featuregood first issuehelp wanted

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Description

We could always use more easing functions.

An easing function is single-variable function that maps values in the range [0, 1] to a numeric value. Generally, we require that f(0) = 0 and f(1) = 1, but otherwise there are no constraints.

If you want to help out feel free to submit a PR, and don't worry about code style. If you need help I can provide a template for your PR.

Tests aren't required for easing functions, but if you want to you can add the new easing function to the graphs example.

Contributor guide

Research direction
Examine the existing easing functions in the source code and add a new one following the same pattern. No tests required, but you may add it to the graphs example.
Tech stack
javascripttypescript
Domain
frontend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
1
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Under 1 hour
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JavaScript
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
90