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ico2(6) ico2(6)
NAME
ico2 - animate an icosahedron or other polyhedron
SYNOPSIS
ico2 [ -r ] [ -d pattern ] [ -i] [ -dbl ] [ -faces ] [ -noedges ] [
-sleep n ] [ -obj object ] [ -objhelp ] [ -colors color-list ]
DESCRIPTION
Ico2 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 informa‐
tion about each object.
-colors colorlist
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 objname.h,
where name 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 objname.h file
should be, then create your objname.h file in that format.
After making the new objname.h file (or copying in a new one from else‐
where), simply do a 'make depend'. This will recreate the file
allobjs.h, which lists all of the objname.h files. Doing a 'make'
after this will rebuild ico with the new object information.
BUGS
If -dbl or -colors is specified on a monochrome screen, or if the num‐
ber of bit planes needed is more than what is available, the server
hangs (this is on a Sun 3/60, patches up to 80 applied).
A separate color cell is allocated for each name in the -colors list,
even when the same name may be specified twice.
SEE ALSO
ico(6)
11 January 1988 ico2(6)
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