Grasshopper

algorithmic modeling for Rhino

Grasshopper definitions have a program flow that represents where to start program execution. However one of the issues i had is curved poly-lines causing the default definition to be visually unappealing. 

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Defining planes by normal only will require GH to work out all the other plane vectors. With no other hint, the might suddenly flip. That's what gets you the "unappealing" behavior.

Use PerpFrames and a circle on a plane to get consistent circle orientations along the curve.

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