# chandlerprall/Physijs

Physics plugin for Three.js

Repository: https://github.com/chandlerprall/Physijs
Canonical: https://ross.abutalabs.com/products/physijs
Language: JavaScript
License: MIT
License Family: permissive
Last push: 2022-08-01T02:08:32+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 5290, "days_push": 1494, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2859, forks 452 (observed 2026-08-28T04:07:25.968884+00:00)

## What it is
Physijs is a physics plugin for the Three.js 3D graphics library, built on top of ammo.js (with a cannon.js branch). It runs physics simulations in a web worker and lets developers add rigid bodies, collisions, constraints, and vehicles to Three.js scenes with minimal code.

## Use cases
- add physics to a three.js scene
- simulate rigid bodies and collisions in the browser
- build a 3D jenga or stacking game with three.js
- create vehicle physics in a web 3D app
- run physics simulations without blocking rendering
- use custom convex or concave collision shapes in three.js

## When to choose
- you already use three.js and want easy physics integration
- you want physics running off the main thread via web workers
- you need simple rigid body, collision, and constraint setup in the browser

## When to avoid
- you need a modern, actively maintained physics engine
- you use a 3D framework other than three.js
- you need advanced physics features not supported by ammo.js bindings here

## Facets
- artifact type: plugin
- maturity: maintenance
- function: game-engine, simulation, graphics
- domain: graphics, web-development
- platform: browser
- tags: threejs, physics-engine, ammojs, web-worker, rigid-body-physics, 3d, game-development, javascript, web

## Member repositories
- chandlerprall/Physijs (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:25.968884+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 2026-08-29T18:48:30.158818+00:00, confidence not recorded.
  - readme: https://github.com/chandlerprall/Physijs (fetched 2026-08-28T04:07:25.968884+00:00, sha 7368d2bafff5)
- Data as of 2026-08-30T08:39:29.467469+00:00.