Pull in changes from jbox2d

* Make velocityThreshold mutable - See jbox2d/jbox2d#1
* TimeOfImpact loop fixes - See jbox2d/jbox2d#36
* fix ropejoint pool leak bug - See jbox2d/jbox2d#59
tree: 6fe8034a924aa65cef953b9fdfe737a334159b52
  1. benchmark/
  2. example/
  3. lib/
  4. tool/
  5. .gitignore
  6. .travis.yml
  7. analysis_options.yaml
  8. CHANGELOG.md
  9. codereview.settings
  10. LICENSE
  11. pubspec.yaml
  12. README.md
README.md

###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