GR3.EXE rotates randomly selected geometric figures in three dimensions.
Just start the program, sit back, and enjoy.

The possible figures are:
        Box(es)
        Sphere
        Diamond
        Spiral
        Digital Clock with blinking colons
        Analog Clock with continuous sweep second hand
        Variable speed electric mixer
        Electric fan

The figures rotate in all three dimensions.  One of three rotation algorithms
is selected at random:
        Linear speed
        Slow acceleration/deceleration
        Fast acceleration/deceleration

Likewise, colors are chosen at random.  The program is written for the VGA's
capability.  An EGA offers fewer color possibilities.  A CGA will display only
black and white.

GR3 runs continuously until any key is pressed.

GR3 is very compute intensive.  Best visual effect requires a 16 MHz (or
faster) machine with a coprocessor.  Lesser configurations will have a
jerky display.

Command line switches for GR3.EXE:
/T Sets the number of seconds each figure is displayed.  Can range from 5 to
   120.  Default is /T30.
/W Adjusts the aspect ratio.  Larger numbers stretch the figure horizontally.
   Can range from 50 to 300.  Default is /W100 for a VGA, /W137 for an EGA,
   or /W240 for a CGA.  To interactively tune this switch, use the /S switch.
/D Adjusts the depth.  Larger numbers cause the rear side of a figure to be
   smaller than the front.  Can range from 0 to 20.  Default is /D4.  Using
   /D0 eliminates the depth perspective.  To interactively tune this switch,
   use the /S switch.
/S Provides a test pattern and allows the /W and /D values to be adjusted with
   the arrow keys.


         ----------------end-of-author's-documentation---------------

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