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boing(6)		      XScreenSaver manual		      boing(6)

NAME
       boing - draws a bouncing ball like the ancient Amiga demo

SYNOPSIS
       boing   [-display  host:display.screen]	[-window]  [-root]  [-install]
       [-visual visual]	 [-delay  usecs]  [-smooth]  [-lighting]  [-scanlines]
       [-speed]	 [-no-spin]  [-angle  degrees]	[-size	ratio]	[-parallels n]
       [-meridians n] [-wireframe] [-fps]

DESCRIPTION
       The boing 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 Con‐
       sumer Electronics Show (or so the legend goes.)	 The  boing  ball  was
       briefly the official logo of Amiga Inc., until they were bought by Com‐
       modore later that year.

       With no arguments, this program looks a lot  like  the  original	 Amiga
       demo. With "-smooth -lighting", it looks... less old.

OPTIONS
       boing accepts the following options:

       -window Draw on a newly-created window.	This is the default.

       -root   Draw on the root window.

       -install
	       Install a private colormap for the window.

       -visual visual
	       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.

       -delay usecs
	       The  delay  between  frames  of the animation, in microseconds:
	       default 15000.

       -smooth Draw a smooth sphere instead of a faceted polyhedron.

       -lighting
	       Do shaded lighting instead of flat colors.

       -scanlines
	       If the window is large enough, draw horizontal lines  to	 simu‐
	       late the scanlines on a low resolution monitor.

       -speed ratio
	       Change  the  animation speed; 0.5 to go half as fast, 2.0 to go
	       twice as fast.

       -no-spin
	       Don't rotate the ball.

       -angle degrees
	       The jaunty angle at which the ball sits.	 Default 15 degrees.

       -size ratio
	       How big the ball is; default 0.5 meaning about half the size of
	       the window.

       -parallels n
	       -meridians  n  The  pattern of rectangles on the ball.  Default
	       8x16.

       -wireframe
	       Look crummy.

       -fps    Display the current frame rate, CPU load, and polygon count.

ENVIRONMENT
       DISPLAY to get the default host and display number.

       XENVIRONMENT
	       to get the name of a resource file that	overrides  the	global
	       resources stored in the RESOURCE_MANAGER property.

SEE ALSO
       bsod(6), pong(6), xscreensaver(1), X(1)

COPYRIGHT
       Copyright  ©  2005 by Jamie Zawinski.  Permission to use, copy, modify,
       distribute, and sell this software and its documentation for  any  pur‐
       pose  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 repre‐
       sentations are made about the suitability of this software for any pur‐
       pose.  It is provided "as is" without express or implied warranty.

AUTHOR
       Jamie Zawinski <jwz@jwz.org>, 19-Feb-2005.

X Version 11		      5.07 (10-Aug-2008)		      boing(6)
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