rocks(6x) XScreenSaver manual rocks(6x)
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 vis-
ual] [-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 cho-
sen 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 de-
creasing 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 © 1992 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
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 5.45 (08-Dec-2020) rocks(6x)
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