Hello,
I am so confused, maybe you could help me out in this situation…
I have long 3D polyline with many points on it, each point will represent fence component inserted via Tekla. What I want to achieve, that each point would be orientated so it is alfa/2 and facing only right side of polyline. Is it possible? Can’t upload rhino file - too heavy, but if anyone could help with an example - would be grateful. Thank you
I used Rhino 7, can’t attach Tekla component here. Could you help with a solution of any random polyline with points to solve similar task? I am missing a concept of how to calculate correct angle between vectors. Thank you
I don’t have Tekla anyway and doubt that it’s needed.
Either post the R7 file or right-click the Crv param and select “Internalise data” (Internalize data).
No more time now… This might be useful? I don’t really know your objective 
Using two sample polycurves, one found in your GH file (moved near the origin and scaled) and the other I created.
P.S. This code has several flaws, perhaps all limited to handling multiple polylines? Seems to work as expected with only one polyline but fails with two more more… 
Other plans today preclude a quick fix from me, sorry.
I think you can cheat it with a tiny double offset + curve side here:
Tvora_example.gh (20.1 KB)
I tested with a few random polylines.
Best,
RC
