Provided by: xscreensaver-gl-extra_5.34-2ubuntu1_amd64 bug


       boing - draws a bouncing ball like the ancient Amiga demo


       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]


       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 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.


       boing accepts the following options:

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

       -root   Draw on the root window.

               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.

               Do shaded lighting instead of flat colors.

               If the window is large enough, draw horizontal lines to simulate 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.

               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.

               Look crummy.

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


       DISPLAY to get the default host and display number.

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


       bsod(6x), pong(6x), xscreensaver(1), X(1)


       Copyright © 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.


       Jamie Zawinski <>, 19-Feb-2005.