b2dJson - Box2D JSON loader - iforce2dIntro It is often useful to be able to save the state of the Box2D world and reproduce it later, whether for loading a game level, a saved game, tuning the parameters of your simulation, or just simply for debugging. A common method for doing this is to loop through all the bodies, fixtures and joints in the world and write them to a text file. XML is often the first choice of file format since it
