Vertex cloning

This operation is not properly an operator (in the functional sense) but rather an operation in the arithmetic sense. Indeed, It can be sometimes helpful to duplicate a vertex to save its coordinates or when vertices share a position. Applying this cloning operation has the effect to create a new vertex (left-hand operand of operation) with the internal data of the right-hand operand (physical coordinates and shifting values). The name of this new vertex is set according to the symbol used in the operation (left-hand operand). Of course this name shouldn't be already used for an existing vertex.
This operator should only appear within a step block.

Usage

  aa = a; % aa is defined as the a clone

Formal structure

  RETURN_VERTEX = VERTEX;

Parameters

  VERTEX
  Description    : Indicates the vertex which is cloned.
  Type           : Symbol, vertex identifier.
  Allowed values : Any vertex identifier previously defined.

Return value

  RETURN_VERTEX
  Description    : Symbol reference of the new vertex created as
                   the clone of VERTEX.
  Type           : Symbol, vertex identifier.
  Allowed values : Any vertex identifier not already defined.