Find a Normal of a curve (line perpendicular to curve)

Grasshopper
1

Hi,

Fairly simpel question but I can’t find it.
Is there a component which generates the Normal to a curve?

So drawing a curve which is perpendicular to the curve?

2021-06-02 Find Normal of Curve.gh (6.0 KB)
image

any suggestions?
Thanks :slight_smile:

2

In which plane?

Perp Frame or Evaluate Curve would be the two commands / components to start with

3

normal_to_curve_2021Jun2a
normal_to_curve_2021Jun2a1210×182 37.2 KB

normal_to_curve_2021Jun2a.gh (4.7 KB)

Version ‘B’:

normal_to_curve_2021Jun2b
normal_to_curve_2021Jun2b1526×371 241 KB

normal_to_curve_2021Jun2b.gh (9.5 KB)

4 Likes
4

You can also use Curve frame

image
image1389×656 113 KB

2021-06-02 Find Normal of Curve__.gh (12.5 KB)

5 Likes
5

my favorite method (especially when you want to clamp/control the rotation):

image
image1262×792 37.1 KB

7 Likes
6

Ahh perfect, thank you!

1 small layout question, how do you get the diplay of the component name above the component?
That is really handy! :slight_smile:

Thanks again! :+1:

7

This called Bifocals

1 Like
8

do you have a good explanation of what Cross Product is. I love how simple this solution is but would love to understand it more so I can evolve my knowledge on how to use this.

Thank you

9

The right-hand rule seems like a good explanation to me.
image
This is from Wikipedia, here: Cross product - Wikipedia