 UCORN                                                      Menu: (MWALS) MWEDT
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 Updates the "dominance" of walls meeting at a corner.

         1. * (IND) wall to be "dominant"
         2. * (Y/N) confirm choice
      if the wall is sloping:
         3. * (CHAR) options: y-fixed slope, n-fixed height <y>
      for all cases:
         4. * (IND) second wall (secondary wall)
         5. * (Y/N) confirm choice
      if the wall is sloping:
         6. * (CHAR) options: y-fixed slope, n-fixed height <y>









 Description:
 This command defines or changes the "dominance" of walls that meet at
 a corner. The "dominance" controls which wall will penetrate the corner to the
 outer face of the second wall. If you have previously used the \mwrfn command,
 one of the walls that meets at the corner will already have been designated as
 the "dominant" wall according to the following criteria:
 for walls of differing heights  the higher wall
 for level walls of the same height  the wall aligned closest to the x axis
 for sloping walls that meet at the same height the wall whose opposite end is
 higher
 If the top of either of the walls slope, i.e., z1 does not equal z2, you will
 be asked whether the slope or the wall height is to be fixed. If the slope is
 fixed, the height of the wall will be adjusted as necessary. If the wall
 height is fixed, the angle of the slope will be adjusted.
