# twixt

**Repository Path**: yjcadmin/twixt

## Basic Information

- **Project Name**: twixt
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: MIT
- **Default Branch**: main
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2025-12-24
- **Last Updated**: 2025-12-24

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

twixt
=====

Twixt is an animation library for PhET Interactive Simulations that provides easing-based controllable animations with modular architecture for testing and common defaults used across PhET simulations.

By PhET Interactive Simulations
https://phet.colorado.edu/

### Features

- **Animation**: Core easing-based animation system with configurable duration, delay, and step emitters
- **AnimationTarget**: Handles individual animated values with Property, object attribute, or custom setValue patterns
- **DampedAnimation**: Physics-based spring animations for natural motion effects
- **Easing**: Comprehensive collection of easing functions with In/Out/InOut variants
- **Transition**: High-level transition management system
- **Integration**: Built for PhET's Property system from axon and stepTimer framework

### Documentation

The [PhET Development Overview](https://github.com/phetsims/phet-info/blob/main/doc/phet-development-overview.md) is the most complete guide to PhET Simulation Development. This guide includes how to obtain simulation code and its dependencies, notes about architecture & design, how to test and build the sims, as well as other important information.

### License

See the [license](LICENSE)

### Contributing

If you would like to contribute to this repo, please read
our [contributing guidelines](https://github.com/phetsims/community/blob/main/CONTRIBUTING.md).