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.TH XScreenSaver 1 "30-Oct-99" "X Version 11"
.SH NAME
boing - draws a bouncing ball like the ancient Amiga demo
.SH SYNOPSIS
.B boing
[\-display \fIhost:display.screen\fP] [\-window] [\-root] [\-install]
[\-visual \fIvisual\fP]
[\-delay \fIusecs\fP]
[\-smooth]
[\-lighting]
[\-scanlines]
[\-speed]
[\-no\-spin]
[\-angle \fIdegrees\fP]
[\-size \fIratio\fP]
[\-parallels \fIn\fP]
[\-meridians \fIn\fP]
[\-wireframe]
[\-fps]
.SH DESCRIPTION
The \fIboing\fP program draws a bouncing checkered ball on a grid.
This is a clone of the first graphics demo for the Amiga 1000, which
was written by Dale Luck and RJ Mical during a break at the 1984
Consumer Electronics Show (or so the legend goes.) The boing ball was
briefly the official logo of Amiga Inc., until they were bought by
Commodore later that year.
With no arguments, this program looks a lot like the original Amiga
demo. With "-smooth -lighting", it looks... less old.
.SH OPTIONS
.I boing
accepts the following options:
.TP 8
.B \-window
Draw on a newly-created window. This is the default.
.TP 8
.B \-root
Draw on the root window.
.TP 8
.B \-install
Install a private colormap for the window.
.TP 8
.B \-visual \fIvisual\fP\fP
Specify which visual to use. Legal values are the name of a visual class,
or the id number (decimal or hex) of a specific visual.
.TP 8
.B \-delay \fIusecs\fP
The delay between frames of the animation, in microseconds: default 15000.
.TP 8
.B \-smooth
Draw a smooth sphere instead of a faceted polyhedron.
.TP 8
.B \-lighting
Do shaded lighting instead of flat colors.
.TP 8
.B \-scanlines
If the window is large enough, draw horizontal lines to simulate the
scanlines on a low resolution monitor.
.TP 8
.B \-speed \fIratio\fP
Change the animation speed; 0.5 to go half as fast, 2.0 to go twice as fast.
.TP 8
.B \-no\-spin
Don't rotate the ball.
.TP 8
.B \-angle \fIdegrees\fP
The jaunty angle at which the ball sits. Default 15 degrees.
.TP 8
.B \-size \fIratio\fP
How big the ball is; default 0.5 meaning about half the size of the window.
.TP 8
.B \-parallels \fIn\fP
.B \-meridians \fIn\fP
The pattern of rectangles on the ball. Default 8x16.
.TP 8
.B \-wireframe
Look crummy.
.TP 8
.B \-fps
Display the current frame rate, CPU load, and polygon count.
.SH ENVIRONMENT
.PP
.TP 8
.B DISPLAY
to get the default host and display number.
.TP 8
.B XENVIRONMENT
to get the name of a resource file that overrides the global resources
stored in the RESOURCE_MANAGER property.
.SH SEE ALSO
.BR bsod (MANSUFFIX),
.BR pong (MANSUFFIX),
.BR xscreensaver (1),
.BR X (1)
.SH COPYRIGHT
Copyright \(co 2005 by Jamie Zawinski. Permission to use, copy, modify,
distribute, and sell this software and its documentation for any purpose is
hereby granted without fee, provided that the above copyright notice appear
in all copies and that both that copyright notice and this permission notice
appear in supporting documentation. No representations are made about the
suitability of this software for any purpose. It is provided "as is" without
express or implied warranty.
.SH AUTHOR
Jamie Zawinski <jwz@jwz.org>, 19-Feb-2005.
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