box2d_flame 0.4.2

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A Dart 2D physics engine

Build Status Coverage Status

This is a Dart port of Java's Box2D libraries.

The Java Box2D library was originally written by Daniel Murphy (status February 2015).

benchmark/bench2d.dart   Benchmark used by Joel Webber
example/index.html       Browser demos as written by Dominic Hamon
lib/                     Port of Daniel Murphy's jbox2d

First Dart port of an earlier version of Box2D library was done by Dominic Hamon. We are grateful for his work.

Not an official Google project


  • Breaking: Made package strong-mode compliant (with implicit-casts and implicit-dynamic off). This means many API points are now more strongly typed (num is now double). Fix errors by providing doubles where they are expected (1 will become 1.0 and num fraction = .5 will become double fraction = .5), and explicitly casting joints (world.createJoint(jointDef) as RevoluteJoint).
  • Pulled in optimizations and bug fixes from the original jbox2d project.
  • Made velocityThreshold mutable (as per jbox2d and other box2d implementations).


  • Updated to vector_math 2.0.0


  • Complete re-write. Many APIs have changed.

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  box2d_flame: ^0.4.2

2. Install it

You can install packages from the command line:

with pub:

$ pub get

Alternatively, your editor might support pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:box2d_flame/box2d.dart';
import 'package:box2d_flame/box2d_browser.dart';
Version Uploaded Documentation Archive
0.4.2 Aug 25, 2018 Go to the documentation of box2d_flame 0.4.2 Download box2d_flame 0.4.2 archive
0.4.1 Jul 15, 2018 Go to the documentation of box2d_flame 0.4.1 Download box2d_flame 0.4.1 archive
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Learn more about scoring.

We analyzed this package on Dec 5, 2018, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.1.0
  • pana: 0.12.7


Detected platforms: web

Platform components identified in package: html.

Maintenance suggestions

Maintain an example.

None of the files in your example/ directory matches a known example patterns. Common file name patterns include: main.dart, example.dart or you could also use box2d_flame.dart. Packages with multiple examples should use example/


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.0.0-dev.50.0 <3.0.0
vector_math >=2.0.0 <3.0.0 2.0.8