ico(1X) — Commands
X11R6
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]
OPTIONS
−rDisplay on the root window instead of creating a new window.
−d pattern
Specify a bit pattern for drawing dashed lines for wire frames.
−iUse 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
Do not 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.
DESCRIPTION
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.
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.
BUGS
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 correctly.
A separate color cell is allocated for each name in the −colors list, even when the same name may be specified twice.
COPYRIGHT
Copyright 1988, X Consortium
See X(1X) for a full statement of rights and permissions.