Variable offset

[GavinCrump]

This is the algorithm i use in dynamo and grasshopper. It’s fairly reliable except for extreme shapes that weave and bend a lot.

Offset Curve not the sample distance

Unfortunately most programs don’t have a builtin way of achieving this - need to do some geometry gymnastics. I had the same challenge in Grasshopper as well, I’ve attached my method built in Dynamo instead. It involves hyperextending the curves in an offset state and finding the most likely center segment when they’re all split at the intersections. It gets a bit messed up for very distorted shapes. You could also use trigonometry on each corner for a better but more complex outcome (I’m not go…