floor - a static floor centered at origin of sides 100m x 100m
two_cubes - a standard example where 2 cubes have a hinge joint between them.
two_cubes_scene - a scene made up of the floor at (0, 0, 0) and two_cubes at (0, 0, 30).
PiperOrigin-RevId: 607809323
Change-Id: I9931d89441653ce7aaf5145ee42c71c0c8f9ffcb
Matthew Bennice