Select set of surfaces from a mesh model

Grasshopper
,
1

Hi,
I have a building imported as a mesh in Rhino, the walls are imported as mesh and as the whole wall geometry. I just need to select the exterior surface of these elements to get the fasade surfaces, but since they are mesh it is very complex. Does anyone has a tips about how to select the exterior surface of this mesh?
I need to get the exterior surface of the whole geometry in grasshopper.

image
image1346×670 115 KB

2

try Weld then MergeAllCoplanarFaces. if the faces are planar you should end up with cleaner surfaces. posting your file to look at would be still better, otherwise suggestions are just guesses.

i am not sure if these commands exist in that form there, but if you want to clean up the stuff before using grasshopper that is how you would do it either.

1 Like
3

Thank you very much for your answer. I will try it in rhino. I look specifically for a way to be able to handle the geometry in Grasshopper.

4

hi @Niloofar_Zaker
you can use this Api
public Polyline[] GetOutlines(
Plane plane
)

var pl = yourMesh.GetOutlines(plane);

or (i add this Component in flexibility plugin)

from Rhino.Geometry  import *
pl=yourMesh.GetOutlines(
plane)
1 Like
5

Thank you Ehsan, I will try that to see how it works.