Getting the borderlines from Faces of a Brep

Replies to This Discussion

Permalink Reply by David Rutten on November 22, 2011 at 7:05am

Hi Max,

 

do you want to find all the boundaries of all the faces in a Brep, or do you want to find all the naked edges for the entire Brep?

 

--

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Max on November 22, 2011 at 11:28am

I need the boundary of each face.

 

I can get the faces by Brep.Faces as BrepFace-Objects but I can't find a command to get the Border of this faces.

 

Permalink Reply by David Rutten on November 22, 2011 at 2:22pm

There's no such function. But you can iterate over all the edges of the face. Then duplicate these edges as curves and join them. Note that a face can have any number (equal to or higher than one) of closed edge loops.

 

--

David Rutten

david@mcneel.com

Poprad, Slovakia

 

Permalink Reply by michael sprinzl on November 24, 2011 at 9:43am

Hi,

maybe this helps... not very elegant

 

private void RunScript(Brep brep_in, object y, ref object A)
  {
    List<Curve> my_curve_list = new List<Curve>();
    for(int i = 0;brep_in.Faces.Count > i;i++)
    {    my_curve_list.AddRange(Curve.JoinCurves(brep_in.Faces[i].DuplicateFace(true).DuplicateEdgeCurves()));
    }
    A = my_curve_list;