Physics Debug Render:

In this short article, I would like to introduce really useful 'tool' for every developer, creating game with physics involved. Especially while creating own body types with IRREGULAR  BODY SHAPES. As you know, by default physics objects are invisible (bodies and so on) To make this task easier, you can use Physics Debug Renderer - project shared by nazgee. 

What it does? You will simply be able to view 'borders' of your bodies (with the same shape obviously) so it's really helpful while creating more advanced bodies. 

DebugRenderer debug = new DebugRenderer(mPhysicsWorld, getVertexBufferObjectManager());
pScene.attachChild(debug);

Keep in mind, that while enabling this debug render, your game may visibly and seriously slow down your game (relatively big loss in FPS in another words) obviously depends on amount of bodies on your scene. But since you will use it only for development purpose, its not a problem at all.