Intersection points over surface from which perpendicular lines start

[karimammor]

Hello everybody,

I received a GH file in which I have an hyperbolic surface (like a 3D egg shape)
On top of it, a pattern with 2D lines has been projected over the surface: that’s how I get a grid with an curved shape. From it, I got all the intersection point thanks to “MultipleCurves” (MCX)

What I would like to found out:
I would like to generate lines from those intersection points and they also need to be perpendicular to the surface underneath.

If someone has an idea, it would be very nice to know how to do it
All my gratitude for your help!

Best reagards,
AK

[diff-arch]

Hi @karimammor,

Welcome to the forums!

I would like to generate lines from those intersection points and they also need to be perpendicular to the surface underneath.

Simply use Surface Closest Point (SrfCP) to find a UV Point (uvP) for each of your points. Then evaluate your surface with Evaluate Surface (EvalSrf) at each UV Point, in order to find its corresponding normal. Lastly, draw a Line SDL (Line) from each point in the direction of the its designated normal and a desired length.

Please read How to ask effective questions to ask your questions more effectively next time!

[seghierkhaled]

Lines perpendicular to points over surface

Hello guys, I’m asking again your help to find this time a way to generate lines that are perpendicular to surface. [Perpendicular%20lines%20from%20points%20over%20surface] The surfaces is meshed, and each intersection point over the surface becomes the origine point for the perpendicular lines. I already used the fonction SDivide to get my points over the surface. I am struggling after to create perpendicular lines. It would be super cool to have some advices. Thanks in advance! Best re…

[karimammor]

Thank you P1r4t3b0y for your answer and the precious advice. I will read it carefully. Next time I’ll post more efficient and clear questions. The combinaison you gave is life saving! It could also work perfectly for other projects! Thanks again!