How to model a tunnel section in rhino-grasshopper

“French expression” “Et bien on n’est pas au bout du tunnel” :wink:
Meaning that we are still in a difficult situation … I mean the discussion was about using Grasshopper to make a parametric tunnel.

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Looks like rest of the conversation has gone off the path of the original topic… Anyways I just wanted to mention that I just happened to serve as an artillery officer also and we also used 6400 per revolution for angle measurement, but it was called mils as in NATO standards. Seems it’s a rounded up value of a milligradian (1/6283).

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