# intuit/AnimationEngine

Easily build advanced custom animations on iOS.

Repository: https://github.com/intuit/AnimationEngine
Canonical: https://ross.abutalabs.com/products/animationengine
Language: Objective-C
License: MIT
License Family: permissive
Archived: true
Last push: 2015-11-22T04:03:09+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 4367, "days_push": 3937, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1055, forks 75 (observed 2026-08-28T04:03:24.327817+00:00)

## What it is
INTUAnimationEngine is an Objective-C library for building advanced custom animations on iOS, driven by CADisplayLink with a UIView block-based animation-inspired API. It includes easing and interpolation function libraries plus a standalone pure-C spring physics solver for damped harmonic motion.

## Use cases
- animate custom properties not supported by Core Animation
- make gesture-driven animations run automatically over a duration
- get a callback every frame of an animation
- create spring animations with control over damping, stiffness, and mass
- customize animation timing with easing functions
- use a standalone C spring physics solver in non-animation apps

## When to choose
- you maintain a legacy Objective-C iOS app needing advanced custom animations
- you need to animate values or properties Core Animation cannot animate
- you want interactive gesture-driven animations to play automatically
- you need a pure C spring physics solver for damped harmonic motion

## When to avoid
- starting a new Swift or SwiftUI project where modern APIs suffice
- you need actively maintained software with recent updates
- you only need simple standard UIView animations
- you target platforms other than iOS

## Facets
- artifact type: library
- maturity: abandoned
- function: animation
- domain: mobile-development, graphics
- platform: -
- tags: objective-c, cocoapods, easing-functions, spring-physics, cadisplaylink, interactive-animations, ios, mobile

## Member repositories
- intuit/AnimationEngine (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:24.327817+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:58:38.722832+00:00, confidence not recorded.
  - readme: https://github.com/intuit/AnimationEngine (fetched 2026-08-28T04:03:24.327817+00:00, sha 4a604a939d28)
- Data as of 2026-08-30T08:39:29.467469+00:00.