Comment by lambdatronics

Really nice work! Reminds me of some of Bret Victor's stuff.

The graph saying that the velocity curve of the piston is asymmetric left-right is wrong. It should be top-bottom asymmetric instead. They got the text right though. Edit: oops, I'm wrong... the position curve would be left-right symmetric while being up-down asymmetric, but then if you take the derivative you get what they are showing.