Grasshopper

algorithmic modeling for Rhino

Decompose and delete brep faces in Python

Hi everyone,

I'm currently trying to split and delete a Brep with Python. Specifically I have one brep which intersects with another. What I want to do is simply delete the intersecting faces.

My code deletes the correct faces, but the remaining faces are rectangles rather than the trimmed surfaces. What do I need to do with the faces to get the brep surfaces? Here is my simple code and attached pictures:

import Rhino as rh

keepFaces = []
for f in Faces:
    x,y,z = rh.Geometry.Intersect.Intersection.BrepSurface(Rod,f,0)
    if len(str(y))==16:
        keepFaces.append(f)

Thanks for your help,

Florian

What I have:

What I want:

What I get:

Views: 1308

Replies to This Discussion

Permalink Reply by David Rutten on October 24, 2014 at 2:45am
Keepfaces must be a list of surfaces instead of brepfaces. Surfaces in RhinoCommon do not support trims. I think you have to convert your brepfaces into actual breps before adding them to the list.
Permalink Reply by djordje on October 24, 2014 at 3:05am

DuplicateFace will do the trick, as David said:

        keepFaces.append(f.DuplicateFace(False))

newBrep = Rhino.Geometry.Brep.JoinBreps(keepFaces, 0.01)

Permalink Reply by Florian Bendl on October 24, 2014 at 11:29am

Thanks a lot to you two! The "DuplicateFace" method did the trick :)

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