NAME
ico - animate an icosahedron or other polyhedron
SYNOPSIS
ico [-display display] [-geometry geometry] [-r] [-d pattern] [-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 available; adding a new polyhedron
to the program is quite simple.
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 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.
-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 specified, an
icosahedron is drawn.
-objhelp
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
reused.
PROGRAM TERMINATION
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
message).
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(7)
BUGS
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
Copyright 1994 X Consortium
See X(7) for a full statement of rights and permissions.