Bullet is a 3D collision detection and rigid body dynamics library. It has been used in many Hollywood movies such as Megamind, Shrek 4, and How To Train Your Dragon, and popular games such as the Grand Theft Auto series. The Bullet Physics library was originally created by Erwin Coumans. Since 2005, the Bullet project has been open source with many other contributors as well. The Bullet library is published under the zlib license. It is written in C++ and has been ported to several frameworks and programming languages.
LibGDX integrates Bullet through a thin wrapper API. The wrapper tends to follow the original Bullet class names, which means that most classes are prefixed with bt as in the original library. This approach makes it easier to understand and transfer existing knowledge about Bullet by following tutorials and manuals that are not based on LibGDX. You can also use the official Bullet user manual and API documentation.
