DragonFly On-Line Manual Pages

rocks(6)                      XScreenSaver manual                     rocks(6)

NAME
       rocks - animation of flying through an asteroid field

SYNOPSIS
       rocks [-display host:display.screen] [-foreground color] [-background
       color] [-window] [-root] [-mono] [-ncolors n] [-install] [-visual
       visual] [-count integer] [-delay usecs] [-speed integer] [-norotate]
       [-nomove] [-3d] [-fps]

DESCRIPTION
       The rocks program draws an animation of an asteroid field moving past
       the observer (or vice versa).  Sometimes the observer picks up spin on
       Z axis.

OPTIONS
       rocks accepts the following options:

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

       -root   Draw on the root window.

       -mono   Make all the rocks the same color.

       -ncolors colors
               How many different colors to use.  Default 5.  Colors are
               chosen randomly.

       -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.

       -count integer
               Maximum number of rocks to draw on the screen at once.  Default
               100.

       -speed integer
               A measure of the speed with which the observer and the rocks
               pass each other, from 1 to 100.  Default 100, meaning ``very
               fast.''  If you're on a slow display connection (the animation
               looks jerky) then try making this number smaller, and/or
               decreasing the number of rocks.

       -delay microseconds
               Number of microseconds to delay between each frame.  Default
               50000, meaning about 1/20th second.  Compare and contrast with
               -speed, above.

       -norotate
               Don't rotate the observer; just fly through the field on the
               level.

       -nomove Don't turn the observer; just fly straight ahead through the
               field.

       -3d     Do red/blue 3d separations: if you look at the screen with 3d
               glasses, the rocks will be jumping right out at you.  Oooooh,
               scaaary!

       -fps    Display the current frame rate and CPU load.

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
       X(1), xscreensaver(1)

BUGS
       There should be an option to display doppler shift (a gravity rainbow.)

       Speed of rotation should be settable.

       Default speed of rotation should be relative to forward velocity.

COPYRIGHT
       Copyright (C) 1992 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.

AUTHOR
       Based on Lisp Machine code copyright 1988 John Nguyen
       <johnn@hx.lcs.mit.edu>.

       Ported to C and X by Jamie Zawinski <jwz@jwz.org>, 13-aug-92.

       Steering code by Jeremie Petit; 3D code by theiling@coli.uni-sb.de.

X Version 11                  5.34 (24-Oct-2015)                      rocks(6)