# DanielChappuis/reactphysics3d

Open source C++ physics engine library in 3D

Repository: https://github.com/DanielChappuis/reactphysics3d
Canonical: https://ross.abutalabs.com/products/reactphysics3d
Homepage: http://www.reactphysics3d.com
Language: C++
License: Zlib
License Family: permissive
Topics: physics-engine, collision-detection, reactphysics3d, collision, simulation, game-development, animation
Last push: 2025-03-28T06:33:07+00:00

## Health v2 (maintenance only)
Score: 29/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 13, release rhythm 8, longevity 100
- inputs: {"age_days": 4849, "days_push": 523, "days_rel": 691, "gap_med": null, "n_releases_24m": 1}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1771, forks 269 (observed 2026-08-28T04:05:34.108721+00:00)

## What it is
ReactPhysics3D is an open-source C++ physics engine library for 3D simulations and games, providing rigid body dynamics, collision detection, joints, and ray casting. It has no external dependencies, is multi-platform, and includes documentation, a testbed with demos, and unit tests.

## Use cases
- add rigid body physics to a 3D game
- simulate collision detection between 3D meshes
- implement joints and constraints in a physics simulation
- perform ray casting in a 3D scene
- build a physics sandbox or testbed demo
- simulate height fields and terrain collision

## When to choose
- you need a lightweight C++ physics engine with no external dependencies
- you are building a 3D game or simulation on Windows, Linux, or macOS
- you want rigid body dynamics with collision shapes like spheres, boxes, capsules, convex meshes, and height fields
- you prefer a permissive ZLib license

## When to avoid
- you need continuous collision detection or soft body physics
- you need GPU-accelerated or massively parallel physics at very large scale
- you need a physics engine with a large community and extensive third-party integrations
- you work in a language other than C++ without bindings

## Facets
- artifact type: library
- maturity: active
- function: simulation, game-engine, graphics
- domain: simulation, graphics
- platform: cpp, windows, cross-platform
- tags: physics-engine, rigid-body-dynamics, collision-detection, 3d, zlib-license, game-development, linux, macos

## Member repositories
- DanielChappuis/reactphysics3d (main) score 29

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:34.108721+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 2026-08-30T03:25:58.862172+00:00, confidence not recorded.
  - readme: https://github.com/DanielChappuis/reactphysics3d (fetched 2026-08-28T04:05:34.108721+00:00, sha 377a2d4bcd64)
  - homepage: http://www.reactphysics3d.com (fetched 2026-08-29T11:04:27.526069+00:00, sha 8eba4953e5c1)
  - site_page: https://www.reactphysics3d.com/documentation (fetched 2026-08-29T11:04:27.535589+00:00, sha 711cbfc571cc)
- Data as of 2026-08-30T08:39:29.467469+00:00.