Projecting lines on a curve Perpendicular

I am newbie on grasshopper. i am trying to project perpindicular lines on cure at given locations. kindly share your experience.
Best Regards



Thanks dear for swift reply. i want to draw lines perpendicularly on that curve. so if you can put a bit more effort . Highly appreciated. Best Regards

Check these.

Thanks Bro.
in my case it not perpindicular. as you see in image.
i want lines from center to perpanicularly goes both side of center line.
Regards and very much thanks.


This or This

Thanks Bro.
Thats it what i am looking for. Thanks alot.
Best Regards

My results are.


Do one thing share your file. Always do this here.

1 Like

my (10.1 KB)
kindly place points on both side of intersection on curve. and return file for study.
thanks alot for your help.
Best regards

First internalize curve data.


Data tree method. Plugin used (Treesloth | Food4Rhino)

Now pay me…

my (10.5 KB)

my test Noob (1) BVR (8.5 KB)


Thanks alot.

The expression on the Move ‘T’ input is “-x/2” (without quotes):

my (9.0 KB)

Or without Align Plane:

my (7.8 KB)

1 Like

Thanks bro. highly appreciated your help.

I wouldn’t have touched it without your file, which didn’t appear until the 13th post in this thread!?
Always post a file when you start a thread.

More than this his explanation made me crazy…

1 Like

Hi Sir thanks alot for help.
could you do a further bit. by copy points on both directions.
Best Regards