CJUN                                                               Menu: MWALS
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Creates a junction between three or four multi-layer walls.

         1.  (CHAR) no. of walls involved (3-4) <3>
         2.  (IND) first "head" wall
         3.  (Y/N) confirm choice
         4.  (IND) second "head" wall
         5.  (Y/N) confirm choice
      if `3' is selected in prompt 1:
         6.  (CHAR) "leg" wall
         7.  (Y/N) confirm choice
         8.  (Y/N) solution acceptable ?
      if `4' is selected in prompt 1:
         6.  (CHAR) first "leg" wall
         7.  (Y/N) confirm choice
         8.  (CHAR) second "leg" wall
         9.  (Y/N) confirm choice
         10. (NUM) solution: 1-change 1st leg, 2-change 2nd leg, 3-acceptable

Description
This command creates a junction between three or four multi-layer walls.  The
rules for joining are governed by the contents of the TRULES.ARC file as in
the creation of T-junctions (see \tjun).

The first two walls (which must be of the same type, symmetry and alignment),
behave as "heads" of the T while the third (and fourth wall if applicable)
behaves like the "leg" of T.

Specify whether the number of walls involved is three or four.  Indicate and
confirm the first and second "head" of the wall.

In the case of three walls (`3' selected in prompt 1), where the leg extends
through both sides of the head walls, the side indicated will be the side to
remain.  Indicate and confirm the "leg" of the wall.  The three walls will be
joined.  Confirm if the solution is acceptable.

In the case of four walls (if `4' was selected in prompt 1), indicate and
confirm the first "leg" of the wall.  Indicate and confirm the second "leg" of
the wall.  This must be on the opposite side of the first wall.  The walls
will be joined.  Confirm if the solution is acceptable or specify to change
the solution between the "heads" and the first "leg" or the second "leg" of
the wall.

If one, two or all three walls do not meet, the system will stretch or shorten
the walls so that they meet.

If all the indicated walls are the same type, the wall indicated first will
penetrate the last walls indicated.
