ICO(1)                   USER COMMANDS                     ICO(1)



NAME
     ico - animate an icosahedron or other polyhedron

SYNOPSIS
     ico [-display display] [-geometry geometry]  [-r]  [-d  pat-
     tern]  [-i]  [-dbl]  [-faces]  [-noedges]  [-sleep  n] [-obj
     object] [-objhelp] [-colors color-list]

DESCRIPTION
     Ico displays a wire-frame rotating polyhedron,  with  hidden
     lines  removed, or a solid-fill polyhedron with hidden faces
     removed.  There are a number of different  polyhedra  avail-
     able;  adding  a new polyhedron to the program is quite sim-
     ple.

OPTIONS
     -r   Display on the root window instead of  creating  a  new
          window.

     -d pattern
          Specify a bit pattern for drawing dashed lines for wire
          frames.

     -i   Use inverted colors for wire frames.

     -dbl Use double buffering on the display.   This  works  for
          either  wire  frame  or solid fill drawings.  For solid
          fill drawings, using this switch  results  in  substan-
          tially  smoother  movement.   Note  that  this requires
          twice as many bit planes as without  double  buffering.
          Since some colors are typically allocated by other pro-
          grams, most eight-bit-plane displays will  probably  be
          limited to eight colors when using double buffering.

     -faces
          Draw filled faces instead of wire frames.

     -noedges
          Don't draw the wire frames.  Typically used  only  when
          -faces is used.

     -sleep n
          Sleep n seconds between each move of the object.

     -obj object
          Specify what object to draw.  If no  object  is  speci-
          fied, an icosahedron is drawn.

     -objhelp
          Print out a list of the available objects,  along  with
          information about each object.




X Version 11         Last change: Release 4                     1

ICO(1)                   USER COMMANDS                     ICO(1)



     -colors color color ...
          Specify what colors should be used to draw  the  filled
          faces  of  the  object.   If less colors than faces are
          given, the colors are reused.

ADDING POLYHEDRA
     If you have the source to ico, it is very easy to  add  more
     polyhedra.  Each polyhedron is defined in an include file by
     the name of objXXX.h, where XXX is something related to  the
     name  of  the polyhedron.  The format of the include file is
     defined in the file polyinfo.h.  Look at the file  objcube.h
     to  see what the exact format of an objXXX.h file should be,
     then create your objXXX.h file in that format.

     After making the new objXXX.h file (or copying in a new  one
     from  elsewhere),  simply  do  a  'make  depend'.  This will
     recreate the file allobjs.h, which lists all of the objXXX.h
     files.   Doing a 'make' after this will rebuild ico with the
     new object information.

SEE ALSO
     X(1)

BUGS
     A separate color cell is allocated  for  each  name  in  the
     -colors  list,  even  when  the  same  name may be specified
     twice.

COPYRIGHT
     Copyright 1988, Massachusetts Institute of Technology.
     See X(1) for a full statement of rights and permissions.
























X Version 11         Last change: Release 4                     2