How can I create those lines in Grasshopper?
How? Could you explain it to me 
Or how can I start. I already searched for similar references, but have not find some.
Same curve as version ‘b’, but simpler code: (front view)
P.S. Same non-planar curve projected to XZ plane (becoming planar), then mirrored:
Thank you that helped a lot! I baked the curves and placed a circle at the end of the curve to make a sweep1. Could you maybe explain to me how to make that extrude in grasshopper? Is there a component which I do not know to make a multiple sweep1 on many curves.
Without posting your GH file, I am not inclined to reply. I’ve asked twice…
Looks like your circles are not perpendicular to your lines. Try Pipe.
