C++
Acad::ErrorStatus makeNClosed();
Description
This function sets the PolygonMesh to be closed in the N direction. This means that the mesh will be treated as continuous from the last column on to the first column.
Making the PolygonMesh closed in the M direction sets bit 6 of DXF group code 70.
Returns Acad::eOk if successful or Acad::eInvalidInput if the data passed in is not acceptable.