 WALL                                                               Menu: WALLS
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 Creates a wall between two points.

         1.   (POINT) first wall point
         2. * (POINT) next wall point

 Description:
 This command creates a wall between two points. The line connecting these
 points is the axis of the wall. The lines describing the two faces of the wall
 are generated by the system, using the width and height set previously by the
 \setwz or \wzwal commands.
 Walls are created as two-dimensional entities possessing a height attribute.
 Use the \w3d command to expand the walls into the third dimension using the
 height attribute. Pick two points, and a wall is created linking the two
 points. You are prompted for additional points until you enter a new command.
 Each additional point creates another wall segment connected to the end of the
 previous one. The wall corners are resolved by the system.
 NOTE:Walls must be created on the horizontal plane only, and may only be given
 height in the z direction.


         Example: \wall 0 0 0 4 0 0 4 4 0

 Result: Two walls are created, the first having its axis from 0 0 0 to 4 0 0,
 and the second from 4 0 0 to 440.
