Some of the features of the new release are:
- SIMD and Neon optimizations for iOS and Mac OSX, thanks to a contribution from Apple.
- Rolling Friction using a constraint, thanks to Erin Catto for the idea. See Demos/RollingFrictionDemo/RollingFrictionDemo.cpp.
- XML serialization. See Bullet/Demos/BulletXmlImportDemo for XML import and use the -dump_xml option in Bullet/Demos/SerializeDemo to convert from binary .bullet to XML. Note that the XML import is work-in-progress.
- Gear constraint, thanks to Dimitris Papavasiliou for the idea. See Bullet/Demos/ConstraintDemo.
- Improved continuous collision response, feeding speculative contacts to the constraint solver. See Bullet/Demos/CcdPhysicsDemo.
- Improved premake4 build system including support for Mac OSX, Linux and iOS.
- Refactoring of collision detection pipeline using stack allocation instead of modifying the collision object. This will allow better future multithreading optimizations.
- New force/torque joint feedback, see btTypedConstraint::setJointFeedback
- New work-in-progress Bullet Quickstart manual, with full LaTeX source. See Bullet/docs/BulletQuickstart.pdf
Thanks everyone for the contributions and feedback!