 2PCUB                                                      Menu: (POLYG) PRISM
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 Creates a solid prism or a square polygon, given the base plane and two
 points.

         1. * (CHAR) plane of base square (x-xy,y-yz,z-zx) <x>
         2. * (POINT) starting point
         3. * (POINT) end of edge
         4. * (Y/N) positive cube? <y>

 Description:
 This command creates a cubic solid. Choose a plane for the base: x  xy plane
 (the default), y  yz plane or z  xz plane, define the start and end points of
 the cube edge and specify whether the cube is to be positive (option `y') or
 negative (option `n'). The cube height will be identical to the edge length
 defined.

         Example: \2pcub x 0 0 0 4 0 0 y

 Result: A 4 by 4 by 4 box is created with its lower-left corner at the point
 0 0 0.
