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       ico - animate an icosahedron or other polyhedron


       ico  [-display  display]  [-geometry  geometry]  [-r] [-d pattern] [-i]
       [-dbl] [-faces] [-noedges] [-sleep n] [-obj object] [-objhelp] [-colors


       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 available; adding a new polyhedron
       to the program is quite simple.


       -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 substantially smoother movement.  Note
              that this requires twice as many bit planes  as  without  double
              buffering.   Since  some colors are typically allocated by other
              programs, most eight-bit-plane displays will probably be limited
              to eight colors when using double buffering.

       -faces Draw filled faces instead of wire frames.

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

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

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

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

       -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


       Pressing "q" will close a window. If compiled with threads support, the
       program  will  stop only when all threads terminate. You can also close
       an animation window using the ICCCM delete message (depending  on  your
       window  manager, you will have a decoration button or menu to send such


       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.




       Pyramids and tetrahedrons with filled faces do not display correctly.

       A separate color cell is allocated for each name in the  -colors  list,
       even when the same name may be specified twice.  Color allocation fails
       in TrueColor displays and option -faces does not work well.


       Copyright 1994 X Consortium
       See X(7) for a full statement of rights and permissions.