 WXPLD                                                      Menu: (MWALS) MWUTL
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 Explodes a segment/whole multi-layer wall or arc into lines.

         1. * (IND) mwall to explode
         2. * (IND) confirm choice
         3. * (Y/N) option: y-segment of mwall, n-whole mwall <y>
      if reply is `y':
         4.   (Y/N) segment ends: y-right angular, n-free <y>
      if reply is `y':
         5.   (POINT) first point of segment
         6.   (POINT) end point of segment (<ENTER> for a NEW first pt.)
         7.   (Y/N) close wall ends ? <y>
      if reply is `n' to prompt 4:
         5.   (POINT) first point of start segment line
         6.   (POINT) second point of start segment line (<ENTER> for a NEW
                      first pt.)
         7.   (POINT) first point of end segment line (<ENTER> for a NEW second
                      pt.)
         8.   (POINT) second point of end segment line (<ENTER> for a NEW first
                      pt.)
         9.   (Y/N) close wall ends ? <y>

 Description:
 This command "explodes" a segment or a whole multi-layer wall or arc into
 lines. Indicate and confirm the wall to be exploded and state whether the
 whole wall or only a segment of it is to be converted.
 If only part is to be converted, state whether the ends of the segment are to
 be perpendicular to the wall or free.
 If the conversion is to be perpendicular to the wall, specify two points to
 define the ends of the segment, otherwise specify four points (in order to
 define two lines) if the segment is to be free.
 In the case of arcs, a right angular trim is a "radial" trim, i.e., along
 an imaginary line connecting the indicated point to center of the arc.
 State whether the ends of the wall are to be closed. You are prompted to
 indicate another wall to explode until you enter another command.
 NOTE: The converted wall loses the properties of a multi-layer wall.
 NOTE: If the wall to explode contains openings or T-junctions, the exploded
 wall will "overwrite" the parts containing openings or T-junctions.
