Examples
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Bounce_Example: show different coefficients of restitution
Nonconvex_Bounce_Example: show a more complicated nonconvex body with different coefficients of restitution
Bounce_Friction_Example: show spinning sphere bouncing in different direction due to friction
Cube_Example: a stack of cubes
Inclined_Plane_Example
Billiard_Ball_Example
Rolling_Friction_Example
