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.