Create Mesh from topology

Replies to This Discussion

Permalink Reply by Michael Pryor on October 4, 2011 at 9:13am

weaverbird plug-in, or the program topmod.

Permalink Reply by Joost Lauppe on October 4, 2011 at 1:37pm

Michael, thanks for your reply. However, I'm trying to implement a method able to create a Mesh object in a custom component. Currently I have a List<Point> (Vertices) and a List<int[]> (Topology) pointing to the Vertices for each face. I tried to do it by creating a mesh for each individual Face and then add this Face to the Mesh:

 

            //initiate the output mesh
            Mesh mesh = new Mesh();
            MeshingParameters meshParameters = new MeshingParameters();

            //create the output mesh
            meshParameters = MeshingParameters.Coarse;
            meshParameters.RefineGrid = false;
            meshParameters.MinimumEdgeLength = 500;

            //loop over the breps of the faces creating a single mesh for each element
            foreach (RTFace face in meshTopology.Faces)
            {
                Mesh[] meshTriangle = new Mesh[0];

                meshTriangle = Mesh.CreateFromBrep(face.Brep, meshParameters);

                mesh.Append(meshTriangle[0]);
            }

 

This however seems cumbersome, and doesn't return the proper results as it splits Faces, and contains many duplicate nodes.

 

Any suggestions?

Permalink Reply by Joost Lauppe on October 4, 2011 at 2:09pm

Guess I was looking for something simple like this:

 

Rhino.Geometry.Mesh mesh = new Rhino.Geometry.Mesh();
mesh.Vertices.Add(0.0, 0.0, 1.0); //0
mesh.Vertices.Add(1.0, 0.0, 1.0); //1
mesh.Vertices.Add(2.0, 0.0, 1.0); //2
mesh.Vertices.Add(3.0, 0.0, 0.0); //3
mesh.Vertices.Add(0.0, 1.0, 1.0); //4
mesh.Vertices.Add(1.0, 1.0, 2.0); //5
mesh.Vertices.Add(2.0, 1.0, 1.0); //6
mesh.Vertices.Add(3.0, 1.0, 0.0); //7
mesh.Vertices.Add(0.0, 2.0, 1.0); //8
mesh.Vertices.Add(1.0, 2.0, 1.0); //9
mesh.Vertices.Add(2.0, 2.0, 1.0); //10
mesh.Vertices.Add(3.0, 2.0, 1.0); //11

mesh.Faces.AddFace(0, 1, 5, 4);
mesh.Faces.AddFace(1, 2, 6, 5);
mesh.Faces.AddFace(2, 3, 7, 6);
mesh.Faces.AddFace(4, 5, 9, 8);
mesh.Faces.AddFace(5, 6, 10, 9);
mesh.Faces.AddFace(6, 7, 11, 10);
mesh.Normals.ComputeNormals();

 

http://www.rhino3d.com/5/rhinocommon/