# guillaumeblanc/ozz-animation

Open source c++ skeletal animation library and toolset

Repository: https://github.com/guillaumeblanc/ozz-animation
Canonical: https://ross.abutalabs.com/products/ozz-animation
Homepage: http://guillaumeblanc.github.io/ozz-animation/
Language: C++
License: NOASSERTION
License Family: other
Topics: animation, game, data-oriented, mit-license, fbx, collada, sse, simd, soa
Last push: 2026-08-01T21:34:54+00:00

## Health v2 (maintenance only)
Score: 85/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 95, release rhythm 63, longevity 100
- inputs: {"age_days": 4027, "days_push": 32, "days_rel": 32, "gap_med": 559, "n_releases_24m": 2}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2914, forks 343 (observed 2026-08-28T04:07:29.371231+00:00)

## What it is
ozz-animation is an open source C++ 3D skeletal animation library and toolset providing runtime character animation playback (sampling, blending, IK, skinning) with a data-oriented, SIMD-optimized design. It includes offline tooling to convert major DCC formats like FBX, Collada, and glTF into optimized runtime structures, and is renderer- and game-engine-agnostic.

## Use cases
- play skeletal animations in a custom game engine
- blend and sample character animation clips at runtime
- convert FBX or glTF animations to an optimized runtime format
- implement inverse kinematics like foot IK or two-bone IK
- do software skinning with SIMD acceleration
- reduce keyframes and compress animation data
- run character animation in WebAssembly

## When to choose
- you need a fast, memory-efficient, engine-agnostic skeletal animation runtime in C++
- you want offline tooling to import animations from FBX, Collada, or glTF
- you target multiple platforms including WebAssembly with no OS-specific dependencies
- you need IK, blending, motion extraction, and skinning out of the box

## When to avoid
- you need a full game engine with rendering built in
- you work in a language other than C++ without bindings
- you only need simple tweened UI or 2D sprite animation
- you want a high-level editor-driven animation system

## Facets
- artifact type: library
- maturity: stable
- function: animation, graphics, parser, math, simulation
- domain: graphics, simulation
- platform: cpp, windows, wasm, cross-platform
- tags: skeletal-animation, simd, data-oriented, fbx, gltf, collada, inverse-kinematics, skinning, game-engine-agnostic, soa, game-development, linux, macos

## Member repositories
- guillaumeblanc/ozz-animation (main) score 85

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:29.371231+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 2026-08-30T07:34:08.206944+00:00, confidence not recorded.
  - readme: https://github.com/guillaumeblanc/ozz-animation (fetched 2026-08-28T04:07:29.371231+00:00, sha f2fc5f531d12)
  - homepage: http://guillaumeblanc.github.io/ozz-animation/ (fetched 2026-08-29T09:49:21.746478+00:00, sha fe38ce28bb8c)
- Data as of 2026-08-30T08:39:29.467469+00:00.