A quick video demonstrating new Castle Game Engine features using physics joints:
hinge (rotation around an axis)
ball (free rotation)
grab (follow a specified point)
rope (one object is tied to another with an invisible rope - it can move and rotate, as long as the rope distance is preserved).
We can design and simulate everything in CGE editor. This is all open-source, on Castle Game Engine physics_j branch.
Andrzej Kilijański and Michalis Kamburelis work on making it merged to CGE master :) If you like this work, support us: / castleengine .
We use physics engine Kraft for the underlying computation ( / posts ).