[image] Hi is there a way to get the contour of a brep by like in Mesh shadow (a Sillouette), i can not make a mesh out of it since it is too complex, the goal is to get one Polyine like here in red thanks :slight_smile:

So it fits every size. For this type of geometry. Problem b.gh (17.1 KB) [image]

I don’t understand what you are looking for

No GH file? [image] Help Us Help You Grasshopper Asking questions and getting answers is what this forum is all about. Although people are generally very helpful, there are things you can do to improve your chances of getting good and quick answers. Below you will find so…

@Joseph_Oster @inno i hope that can explain my problem here is the simplfyed Problem i want to connect the upper and lower curve to get one boundary surface with four edges [image] Problem.gh (9.3 KB)

Is that also possible for this shape? ( very lower middlepart)

Problem Solve B+.gh (59.8 KB) [image] Thanks to @leopoldomonzani i got an Idea how to solve that for every shape which has Points with same X Values :slight_smile:

@Joseph_Oster @inno @leopoldomonzani The original question was actually I’m trying to project the silhouette (like a shadow from top view) of a complex BREP onto a horizontal plane in Grasshopper. I know mesh-based shadow methods exist, but converting this BREP to mesh is too complex and not feasib…

geometry not internalized :slight_smile: [image] by the way, given a weird-shaped Brep with ALL PLANAR FACES, you can just project all the faces contours (closed curves) in the plane you want to get the shade on, then Region Union them: Problem C Sillouette_inno.gh (18.5 KB) I say “ALL PL…

Thats greate, thanks :slight_smile:

Contour connection

Grasshopper

Joseph_Oster June 7, 2025, 6:32pm 3

No GH file?

3. Attach minimal versions of all the relevant files

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Contour connection

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