A rigid-body simulator that breaks the taboo

I had once programmed a 2D rigid body physics simulator that I called “ISAAC”. Here are some cool animations made in it.

Notice how the collisions change when I change the coefficient of restitution.

Coefficient of restitution = 0

Coefficient of restitution = 0.5

Coefficient of restitution = 1
Energy completely conserved!

Since the program works on a computer, reality doesn’t matter.

Coefficient of restitution = 1.5
Energy created in every collision!

Coefficient of restitution = -1
I DON’T EVEN KNOW!

Thanks for looking.

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