Extract line when it touches surface

Grasshopper
1

Hi all,

I want to extract those lines that touched the building surface in order to reduce the number of line. Any idea about that?

test
test1444×642 219 KB

Thank you in advance.
-HC

1015_3D_isovist_HC.gh (6.8 KB) test geometry.3dm (44.3 KB)

2

pls tag your topic with grasshopper. rhino itself has SelBox. so just bake out those lines/objects if you dont need it dynamically.

here is also a python script no idea if it works, but again not in grasshopper.

3

Hi @encephalon,

Thanks for the fast reply. It seems that we have to select the line manually via SelBox. It is possible for handling small scale of geometry but is there any idea doing it in grasshopper?

PS. The python script is not available now so that I had not tested it.

Best,
-HC

4

@hoganchan113 you could maybe start here

5

Try with Mesh | Ray

1015_3D_isovist_HC_re.gh (9.6 KB)

image
image1669×657 115 KB

6

Hi @anon39580149,

Thanks. It does work perfectly!

-HC

7

Hi @encephalon

Thanks! It is good for rhino beginners.

-HC

8

:astonished: alright then… happy somebody helped out in the end :wink:

9

It is just an amazing forum! Thanks so much!

-HC