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electric sheep - a collaborative screen saver
Scott Draves <spot@draves.org>
http://electricsheep.org
see the file COPYING for the license covering this software.
Electric sheep is an xscreensaver module that displays mpeg video of
an animated fractal flame. In the background it contributes render
cycles to the next animation. Periodically it uploades completed
frames to the server, where they are compressed for distribution to
all clients.
This program is recommended only if you have a high bandwidth
connection to the internet such as DSL, cable modem, T1, or greater.
As usual, to configure, build, and install:
./configure
make
sudo make install
This package depends on curl and xloadimage. You can get them from
http://curl.haxx.se and
http://rpmfind.net/linux/rpm2html/search.php?query=xloadimage,
respectively.
After that you can test it by just running it from the commandline
with "electricsheep". It draws in the center of the root window,
which is likely to be covered by another window, so you'll have to
move the window or switch to a different room to see it. It also
takes it a minute or two to download the first animation and get
going.
If you are running the gnome control panel, then electric sheep should
appear in the list of available screensavers, where you can select it
to be run automatically when your machine is idle.
To run without gnome, or to set your nickname, add the following line
to your .Xdefaults file (or whatever you call your X resource file):
xscreensaver.programs: electricsheep --nick xxxx
where "xxxx" is replaced with your nickname. load the new defaults
with "xrdb ~/.Xdefaults", and then restart xscreensaver. xscreensaver
is documented at http://www.jwz.org/xscreensaver/man.html
If you patch xscreensaver, then you can vote for the sheep with the up
and down arrow keys. These keys will vote for the sheep currently
displayed rather than exit the saver. Just apply timers.c.patch to
xscreensaver/driver/timers.c.
known bug: does not display on 8 bit visuals, perhaps due to the use
of the root window. does not display on 15 bit visuals due to a
terrible hack.
known bug: sometimes, the graphics appear in the upper-left corner of
the screen instead in the center.
known bug: occasionally xscreensaver crashes (BadAccess from
XGetWindowAttributes) while running electricsheep. The following
patch from Aaron Haviland fixed the problem for him, but it made the
upper-left bug happen all the time for me so i didn't include it, but
it may well work for you.
--- electricsheep-0.4.orig/video_out/gdith.c Fri Dec 24 11:57:46 1999
+++ electricsheep-0.4/video_out/gdith.c Mon Apr 9 08:37:28 2001
@@ -492,7 +492,9 @@
}
#ifndef NOCONTROLS
- XSelectInput(display, xinfo->window, ExposureMask | ButtonPressMask );
+ if (!rootFlag) {
+ XSelectInput(display, xinfo->window, ExposureMask | ButtonPressMask );
+ }
// XSelectInput(display, xinfo->window, NoEventMask);
#else
XSelectInput(display, xinfo->window, NoEventMask);
----
v2.1 7/3/01 vibrant colors, hue rotation, background color added. bug
fixed by Matt Reda <mreda@mac.com>: the wrong file was
getting deleted when it tried to reduce cache size!
added reset fuse, statistics reporting, proxy
argument. patch from rockear@hive-mind.net for powerpc.
handle network disconnection and bad anim files gracefully.
v2.0 5/16/01 the big change from the 0.x to 2.x series is the
introduction of connectivity and transitions, so the
animation is always smoothly changing, there are no cuts
(unless it gets stuck and it has to). also: multiple
rendering threads, a separate download thread, voting
(via xscreensaver or just a named pipe), support for
rendering single hirez frames of many tiles instead of
animations of many frames, theoretical support for
rendering modules other than anim.
v1.10 not released.
v1.9 reconstituted, private pre2.0 release.
v0.5 (not released) removed empty AC_CONFIG_SUBDIRS from configure.in
and added return 0 to anim.c (bugfixes from Martin Pool).
added net-present and parasite options, various
bulletproofing.
v0.4 7/31/00 create ~/.sheep directory if needed (bug report by jai
young kim). i'm not bumping the version number since 0.4
hasn't been distributed yet.
v0.4 6/29/00 by default now save the mpeg files in ~/.sheep/ (it keeps
the last 50 megabytes), and switch between them instead
of cycling the same one. mpeg-play now exits more
gracefully when it is unable to read the input file,
preventing evil xscreensaver crashes i hope. minor
cleanup.
v0.3 12/24/99 removed curl from distribution (since no longer
distributing libc5). bugfix to anim.c from Steinar
H. Gunderson and Evan Martin. made more robust in face
of network failures (thanks to Will Luo for pointing out
this problem). automatically installs gnome screensaver
control panel files.
v0.2.1 10/17/99 splash page error no longer fatal. added dependencies
for xloadimage and xscreensaver to rpm spec. should
take curl out & use a dependency, but it's too painful
with libc5/6.
v0.2 10/16/99 adopt curl, separate client & server, adopt automake &
autoconf, gamma is now 1 on the client side, misc
features & bugs.
v0.1 10/2/99 first version. private beta release.
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