Vertex definition

@VERTEX_DEFINITION {
@VERTEX_NAME {VertexName} {
@AT_POINT {PointName}
@TRIAD_NAME {TriadName}
@COMMENTS {CommentText}
}
}

Notes

  1. A vertex is the most basic topological entity. It is used in the definition of the other topological entities, the edge and the face.
  2. The vertex is associated with a geometric component, a point, PointName. Optionally, it is also possible to associate the vertex with a triad, TriadName.
  3. It is possible to attach comments to the definition of the object; these comments have no effect on its definition.