True Reality (TR) is an open source LGPL Game and Simulation Engine written entirely in Standard C++ and OpenGL. It runs on all Windows platforms and GNU/Linux. OpenSceneGraph is used as its graphics engine, along with many other open source projects for support of various features.
TR uses old style namespace notation ex: namesapce1 { namespace2 { } {
They should all be converted to the new notation: namespace1::namespace2 { }