ExtractMeshEdges

Toolbar Menu

Extract Mesh

Not on menus.

The ExtractMeshEdges command separates edges from the parent mesh determined by an angle between mesh face normals.

The command may help if you have a mesh that came from a polysurface but no longer have the polysurface. Using the command with the Unwelded option creates polyline approximations of where the edges of the polysurface were.

Steps

Command-line options

Extract edges by

Unwelded

Extracts edges with coincident vertices.

Break angle

The angle between the face normals of adjacent faces.

Greater than

Specify a minimum break angle.

Select Edge

Specify an example edge to set the minimum break angle.

Less than

Specify a maximum break angle

Select Edge

Specify an example edge to set the maximum break angle.

Join results

Joins the resulting curves.

ExtractNonManifoldMeshEdges

Toolbar Menu

Not on toolbars.

Not on menus.

The ExtractNonManifoldMeshEdges command extracts the mesh faces that have non-manifold edges from a mesh object.

Non-manifold edges

Edges of polysurfaces or meshes that have more than two faces joined to a single edge are non-manifold.

The illustration shows a mesh and a polysurface with non-manifold edges highlighted with the ShowEdges command.

Steps

  1. Start the command.
  2. Set command-line options.
  3. Select a mesh.

Command-line options

ExtractHangingFacesOnly

Only extracts the faces with non-manifold and naked edges.

Yes

No

See also

Collapse mesh faces and vertices

 

 

 

Rhinoceros 6 © 2010-2019 Robert McNeel & Associates. 05-Oct-2019