Uploaded November 2010 | Updated September 2026, 1 week ago

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More info and source code: robinerd.com/#/2D_physics_sim
Background music @ iTunes: itunes.apple.com/se/album/chip-ahoy/id406154281

This is my physics simulator or engine, made for simulating 2D physics. I made it with Java. The simulator includes the physical concepts of gravity, friction, rigid body collision, spring forces, torques and rotations, moment of inertia, momentum and more. The video pretty much shows what it is about, the user draws the rigid body objects with his mouse, similar to drawing in paint, places connections by right clicking, and then starts the simulation.

There are two materials, "wings" and "structure" which come from the fact that this engine will be the base for a new game I'm working on. The game will be a 2D flight simulator, with lots of physics. Anyway, the two materials are for painting objects that overlap. If you paint several shapes in one material, they have to be separated by transparent space to be interpreted as different objects. But if you use different materials you can have overlapping objects, and then connect them together.

I hope you liked this little demo, if you have any questions about the simulator, just ask :)

The background music is "Victory!" composed by me, also available at youtube.com/watch?v=6Zit9qhm5Wc