Curves at intervals along contour lines

Hi,

I'm a grasshopper fresher and would like to know how to write a basic script which would

1. Place a straight line with an adjustable length at adjustable intervals along a series of contour lines

2. These intersecting lines would be perpendicular to the tangent at the particular point of the contour.

Thank you.

Replies to This Discussion

Permalink Reply by Moataz Hamde on August 9, 2017 at 12:20pm

Kind of like this...

Attachments:

Contour Trial.pdf, 2.2 MB

Permalink Reply by Joseph Oster on August 9, 2017 at 12:41pm

By "perpendicular to the tangent at the particular point of the contour", do you mean the surface normal?

Later... Can barely see your .pdf but it looks like you have something else in mind?

Attachments:

intervals_along_contour_lines_2017Aug9a.gh, 13 KB

Permalink Reply by Moataz Hamde on August 9, 2017 at 1:11pm

Thanks for your reply man. Hopefully this .pdf is easier to see. Basically, if I'm looking at the contours in plan, I want to be able to place a curve along intervals on the contour that are perpendicular to that point on the contour in the xy plane.

Attachments:

Contour Trial 2.pdf, 2.5 MB

Permalink Reply by Joseph Oster on August 9, 2017 at 1:44pm

.pdf still isn't helping me much... does your line go in two directions from each point?

Version 'b' rotates the tangent in the World XY plane at each point. You get a different effect if you use the 'EvalSrf F (Frame)' output instead of 'World XY'...

Attachments: