\square

Description 

Operator square defines four new edges associated to four vertices named by the operator parameters (symbols). Edges are built circularly taking two consecutive symbols. The first symbol of the parameter list binds the upper left corner of the square. Second symbol is linked to the upper right corner, the third one names the lower right corner and the fourth is associated to the lower left vertex. The type of the four edges created is border.
This operator should only appear within a step block.

Usage

  \square(a, b, c, d);

Formal structure

  \square(VERTEX_1, VERTEX_2, VERTEX_3, VERTEX_4);

Parameters

  VERTEX_1
  Description    : Name symbol used for the left top corner. 
  Type           : Symbol.
  Allowed values : Any vertex identifier not already defined.

  VERTEX_2
  Description    : Name symbol used for the right top corner. 
  Type           : Symbol.
  Allowed values : Any vertex identifier not already defined.

  VERTEX_3
  Description    : Name symbol used for the right bottom corner. 
  Type           : Symbol.
  Allowed values : Any vertex identifier not already defined.

  VERTEX_4
  Description    : Name symbol used for the left bottom corner. 
  Type           : Symbol.
  Allowed values : Any vertex identifier not already defined.