algorithmic modeling for Rhino
Simple question that is driving me crazy, how can I avoid this to happen?
The vectors are oriented in a single direction, but the circle is drawn with a different orientation depending on the vectors direction. I was doing this in Python in order to make several spirals around a curve but I'm blocked with this problem.
The tangent vector isn't enough to define consitent frame (coordinate system). CNR guesses the plane on which to create the circle on fron the world coordinate system.
The PerpFrame constructs a perpendicular frame from tangent and curvature vecors. This should be consistent for your example.
On the other hand, you could find the CurveCP for each curve and a reference point. Then shift the circles seam with the Seam component
Didn't think that you would use CNR on a plane and a radius... :D
sometimes GH's tolerance of input parameters can be misleading.