Making progress - basic simulation opengl based, libgdx

From my libgdx examples https://github.com/berlinbrown/mechumbra-samples LibGDX is an open-source, cross-platform game development framework that lets you write your game once in Java and deploy it across desktop, Android, iOS, and web platforms. It has components for graphics, audio, input, and physics, LibGDX gives you everything you need to build a complete game.