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 color-list]
Display on the root window instead of creating a new window.
Specify a bit pattern for drawing dashed lines for
wire frames. Use inverted colors for wire frames. 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. Draw filled faces instead of wire
frames. Do not draw the wire frames. Typically used only
when -faces is used. Sleep n seconds between each move of
the 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. 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.
The ico command 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.
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
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.
The root window is not refreshed after ico -r exits; the
last-displayed ico pattern remains.
Pyramids and tetrahedrons with filled faces do not display
A separate color cell is allocated for each name in the
-colors list, even when the same name may be specified
Copyright 1988, X Consortium
See X(1X) for a full statement of rights and permissions.
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