Provided by: xscreensaver-gl-extra_5.15-2ubuntu1_i386 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

       -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

               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


       Jamie Zawinski <>, 19-Feb-2005.