tweenjs/tween.js
Tween.js
tween.js is a JavaScript animation engine and numeric interpolation library. It is designed to calculate intermediate values between a start and end state over time, using easing functions to create smooth transitions for numeric values and object properties.
The project functions as both an animation sequence manager and an easing library, allowing for the coordination of concurrent animation groups and the chaining of multiple transitions. It provides tools for managing the rate of change through acceleration and deceleration functions.
The library covers a broad range of motion capabilities, including value interpolation for arrays and nested objects, playback controls for looping and yoyo effects, and synchronization tools that allow animations to be driven by external clocks or video playback. It utilizes a centralized animation manager to track active transitions and trigger custom callbacks on every frame.
Features
- Value Interpolation Engines - Provides a core engine for calculating fluid intermediate states between numeric values using easing functions.
- JavaScript Animation APIs - Provides a comprehensive JavaScript API for implementing smooth numeric and object property animations.
- Web Interface Animation Libraries - Offers a library for creating smooth visual transitions and movement for web elements.
- Time-Based Linear Interpolation - Calculates intermediate values between start and end states based on elapsed time and duration.
- Frame Callbacks - Triggers user-defined callbacks on every animation frame to synchronize interpolated values with object properties.
- Animation Easing Functions - Implements mathematical easing functions to control the rate of change for animated property transitions.
- Centralized Managers - Utilizes a centralized animation manager to track and update all active transitions in a single global loop.
- Animation Playback Controls - Includes methods for halting running animations and manipulating the execution state of timers.
- Object Property Interpolators - Calculates intermediate values for numeric object properties between starting and ending states.
- Animation Sequence Managers - Coordinates the execution order and timing of multiple sequential animation states through chaining.
- Sequential Animation Orchestrators - Connects multiple animations in a chain where the completion of one automatically triggers the next.
- Game State Interpolation - Updates object positions and properties over time to create seamless movement and character animations.
- Array Interpolators - Calculates smooth transitions between arrays of numbers using linear or Bezier methods.
- Multi-Value Interpolators - Calculates intermediate values between a starting point and a sequence of targets.
- External Clock Injection - Allows animation progress to be driven by an external clock or media playback time.
- Animation Easing Calculators - Provides tools to calculate and define mathematical easing curves for precise control over animation acceleration and deceleration.
- Nested Object Interpolators - Interpolates properties within deeply nested object structures for smooth transitions of sub-values.
- Animation Playback Settings - Supports configurations for looping transitions a specific number of times or indefinitely.
- Animation Controllers - Manages collections of active transitions under a single controller for orchestrated updates.
- Animation Lifecycle Callbacks - Includes hooks that execute custom logic at specific stages, such as start or completion, of an animation.
- Yoyo Playback - Implements a yoyo playback mode that automatically reverses animation direction upon completion.
- Animation and Tweening - Tweening engine for web animations.
- Animations and Motion - A versatile engine for tweening numeric properties.
