{ "scene_type": "distance_barrier_rb_problem", "rigid_body_problem": { "rigid_bodies": [{ "time_stepper": "verlet", "vertices": [ [ -1, -1 ], [ -1, 1 ], [ 1, 1 ], [ 1, -1 ] ], "edges": [ [ 0, 1 ], [ 1, 2 ], [ 2, 3 ], [ 3, 0 ] ], "linear_velocity": [ 0.0, 1.0 ], "angular_velocity": [ 3.14159 ] }] } }