Provided by: xscreensaver-gl-extra_4.23-4ubuntu8_i386
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.
Specify which visual to use. Legal values are the name of a
visual class, or the id number (decimal or hex) of a specific
The delay between frames of the animation, in microseconds:
-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.
Change the animation speed; 0.5 to go half as fast, 2.0 to go
twice as fast.
Don’t rotate the ball.
The jaunty angle at which the ball sits. Default 15 degrees.
How big the ball is; default 0.5 meaning about half the size of
-meridians n The pattern of rectangles on the ball. Default
-fps Display a running tally of how many frames per second are being
rendered. In conjunction with -delay 0, this can be a useful
benchmark of your GL performance.
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(1), pong(1), 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 <email@example.com>, 19-Feb-2005.