Box2D Files

Box2D is a 2D physics engine for games

This is an exact mirror of the Box2D project, hosted at https://github.com/erincatto/box2d. SourceForge is not affiliated with Box2D.

The interactive file manager requires Javascript. Please enable it or use sftp or scp.
You may still browse the files here.

Name	Modified	Size	InfoDownloads / Week
Parent folder
README.md	2025-06-04	1.0 kB	0
v3.1.1 source code.tar.gz	2025-06-04	780.9 kB	0
v3.1.1 source code.zip	2025-06-04	888.4 kB	0
Totals: 3 Items		1.7 MB	0

This is a bug fix release. There are a few minor API changes. Making way for 3.2.0 work.

There are no documentation updates with this releases.

What's Changed

Warning as error off by default by @erincatto in https://github.com/erincatto/box2d/pull/914
functions to get and set surface material by @erincatto in https://github.com/erincatto/box2d/pull/921
Fixed another shape distance assert by @erincatto in https://github.com/erincatto/box2d/pull/926
Revolute and prismatic targets by @erincatto in https://github.com/erincatto/box2d/pull/929
Cast initial overlap by @erincatto in https://github.com/erincatto/box2d/pull/933
Tunable joint stiffness by @erincatto in https://github.com/erincatto/box2d/pull/934
_aligned_free for mingw by @erincatto in https://github.com/erincatto/box2d/pull/939
Removed MSVC static library setting by @erincatto in https://github.com/erincatto/box2d/pull/940

Full Changelog: https://github.com/erincatto/box2d/compare/v3.1.0...v3.1.1

Source: README.md, updated 2025-06-04

Other Useful Business Software

$300 Free Credits to Build on Google Cloud Icon

$300 Free Credits to Build on Google Cloud

New customers can spin up VMs, build with AI, and query data at no cost.

Put your $300 in credit toward real workloads, then keep building with free monthly usage for 20+ products. No commitment and no charge until you upgrade.

Start Free

Save Up to 91% on Cloud Compute With Spot VMs Icon

Save Up to 91% on Cloud Compute With Spot VMs

Automatic sustained-use discounts. One free VM per month. No negotiation needed.

Run batch jobs at 60-91% off with Spot VMs. Long-running workloads get automatic discounts with sustained use.

Start Free

$300 Free Credits to Build on Google Cloud

New customers can spin up VMs, build with AI, and query data at no cost.

Put your $300 in credit toward real workloads, then keep building with free monthly usage for 20+ products. No commitment and no charge until you upgrade.

Start Free

Recommended Projects

Box3D
Box3D is a 3D physics engine for games
Jolt Physics
A multi core friendly rigid body physics and collision detection lib
Matter.js
A 2D rigid body physics engine for the web
EZPhysics
EZPhysics API library integrates rigid-body physics pretty graphics. Rigg up skeletal meshes and virtual reality scenes with simulated joints, mass and collision info. Combines ODE, Ogre3D, wxWidgets. Aspires to become a real-time robot simulator.
FreeSOLID
FreeSOLID is a library for collision detection of three-dimensional objects undergoing rigid motion and deformation. FreeSOLID is designed to be used in interactive 3D graphics applications.