4 ! a screen saver and locker for the X window system
10 ! See "man xscreensaver" for more info. The latest version is always
11 ! available at http://www.jwz.org/xscreensaver/
14 ! These resources, when placed in the system-wide app-defaults directory
15 ! (e.g., /usr/lib/X11/app-defaults/XScreenSaver) will provide the default
16 ! settings for new users. However, if you have a ".xscreensaver" file in
17 ! your home directory, the settings in that file take precedence.
38 *overlayTextForeground: #FFFF00
39 *overlayTextBackground: #000000
41 *font: *-medium-r-*-140-*-m-*
43 ! The default is to use these extensions if available (as noted.)
44 *sgiSaverExtension: True
45 *mitSaverExtension: False
49 ! This is what the "Demo" button on the splash screen runs (/bin/sh syntax.)
50 *demoCommand: xscreensaver-demo
52 ! This is what the "Prefs" button on the splash screen runs (/bin/sh syntax.)
53 *prefsCommand: xscreensaver-demo -prefs
55 ! This is the URL that the "Help" button on the splash screen loads.
56 *helpURL: http://www.jwz.org/xscreensaver/man.html
58 ! This is how the "Help" button loads URLs (/bin/sh syntax.)
59 ! The "helpURL" will be substituted for up to two occurrences of "%s".
60 *loadURL: netscape -remote 'openURL(%s)' || netscape '%s'
63 ! The format used for printing the date and time in the password dialog box
64 ! (see the strftime(3) manual page for details.)
65 *dateFormat: %d-%b-%y (%a); %I:%M %p
66 ! To show the time only:
67 ! *dateFormat: %I:%M %p
72 ! Turning on "installColormap" interacts erratically with twm and tvtwm,
73 ! but seems to work fine with mwm and olwm. Try it and see. If your
74 ! screen turns some color other than black, the window manager is buggy,
75 ! and you need to set this resource to False (or get a WM that works.)
77 *installColormap: True
80 ! Any program which can draw on the root window will work as a screensaver.
81 ! The following resource enumerates them.
83 ! Programs are separated by newlines (specified in resource files with \n).
84 ! Lines may be continued with a lone \ at the end of the line.
86 ! Each line is an `sh' command.
88 ! If the first (non-blank) character on the line is "-", then that means
89 ! that this command is disabled: it's still in the list, but it won't ever
90 ! be used. (This is just to make it easy to disable and then re-enable
93 ! If the first word on the line is the name of a visual followed by a
94 ! colon, then that visual will be used for the program, if it is available.
95 ! If no such visual is available, then the program will be skipped. In
96 ! this way, you can specify that you want certain programs to run only
97 ! on color screens, and others only on mono screens, by making use of the
98 ! magic visual names "color" and "mono". Likewise, if some hacks prefer
99 ! colormaps, but others prefer 24-bit windows, that also can be arranged
100 ! (in this case, by using "PseudoColor:" versus "TrueColor:".)
102 ! Some of the screenhacks are written using OpenGL. OpenGL programs are
103 ! a bit different than normal X programs, in that they prefer visuals that
104 ! are *half* as deep as the screen. You can tell xscreensaver to select a
105 ! good visual for a GL program by using the magic visual name "GL".
107 ! All programs must be launched in such a way that they draw on the root
108 ! window; they should not be spawned in the background with "&". If shell
109 ! metacharacters are used, they must be understandable to `sh', not `csh'
110 ! (the $SHELL variable is not consulted, for unfortunate but good reasons.)
112 ! Be sure to check out Demo Mode: run the `xscreensaver-demo' program to
113 ! edit the current list of programs interactively, try out the various modes,
114 ! and change other parameters. See the man page for details.
117 "Qix (solid)" qix -root -solid -delay 0 -segments 100 \n\
118 "Qix (transparent)" qix -root -count 4 -solid -transparent \n\
119 "Qix (linear)" qix -root -count 5 -solid -transparent \
120 -linear -segments 250 -size 100 \n\
121 "Attraction (balls)" attraction -root -mode balls \n\
122 "Attraction (lines)" attraction -root -mode lines -points 3 \
124 "Attraction (splines)" attraction -root -mode splines -segments \
126 "Attraction (orbital)" attraction -root -mode lines -radius 300 \
127 -orbit -vmult 0.5 \n\
131 rorschach -root -offset 7 \n\
136 slidescreen -root \n\
137 decayscreen -root \n\
139 blitspin -root -grab \n\
143 "Ripples (oily)" ripples -root -oily -light 2 \n\
144 "Ripples (stir)" ripples -root -oily -light 2 -stir \n\
145 "Ripples (desktop)" ripples -root -water -light 6 \n\
160 "Grav (trails)" grav -root -trail -decay \n\
175 goop -root -max-velocity 0.5 -elasticity \
178 "Starfish (blob)" starfish -root -blob \n\
181 coral -root -delay 0 \n\
183 triangle -root -delay 1 \n\
190 kaleidescope -root \n\
192 xlyap -root -randomize \n\
196 interference -root \n\
197 truchet -root -randomize \n\
203 "RD-Bomb (mobile)" rd-bomb -root -speed 1 -size 0.1 \n\
212 "Wander (spots)" wander -root -advance 0 -size 10 -circles \
213 True -length 10000 -reset 100000 \n\
217 petri -root -size 2 -count 20 \n\
218 "Petri 2" petri -root -minlifespeed 0.02 \
219 -maxlifespeed 0.03 -minlifespan 1 \
220 -maxlifespan 1 -instantdeathchan 0 \
221 -minorchan 0 -anychan 0.3 \n\
226 default-n: webcollage -root \n\
227 default-n: "WebCollage (whacked)" \
228 webcollage -root -filter \
229 'vidwhacker -stdin -stdout' \n\
230 - default-n: vidwhacker -root \n\
232 - mono: "Rocks (mono)" rocks -root \n\
233 color: "Rocks (color)" rocks -root -fg darksalmon \n\
234 - mono: "Qix (xor)" qix -root -linear -count 5 -size 200 \
235 -spread 30 -segments 75 -solid -xor \n\
236 color: "Attraction (poly)" attraction -root -mode polygons \n\
237 - color: "Attraction (filled)" attraction -root -mode filled-splines \
239 - Color: "Attraction (glow)" attraction -root -glow -points 10 \n\
240 color: bubbles -root \n\
242 @GL_KLUDGE@ GL: gears -root \n\
243 @GL_KLUDGE@ GL: superquadrics -root \n\
244 @GL_KLUDGE@ GL: morph3d -root \n\
245 @GL_KLUDGE@ GL: cage -root \n\
246 @GL_KLUDGE@ GL: moebius -root \n\
247 @GL_KLUDGE@ GL: stairs -root \n\
248 @GL_KLUDGE@ GL: pipes -root \n\
249 @GL_KLUDGE@ GL: sproingies -root \n\
250 @GL_KLUDGE@ GL: rubik -root \n\
251 @GL_KLUDGE@ GL: atlantis -root \n\
252 @GL_KLUDGE@ GL: lament -root \n\
253 @GL_KLUDGE@ GL: bubble3d -root \n\
254 @GL_KLUDGE@ GL: glplanet -root \n\
255 @GL_KLUDGE@ GL: pulsar -root \n\
256 - GL: "Pulsar (textures)" \
257 pulsar -root -texture -mipmap \
258 -texture_quality -light -fog \n\
259 @GLE_KLUDGE@GL: extrusion -root \n\
260 @GL_KLUDGE@ GL: sierpinski3d -root \n\
263 ! Some other programs that you might want to track down (these work as
264 ! XScreenSaver helpers, but are not distributed with it):
266 ! xdaliclock -root -builtin2 \n\
269 ! xbouncebits ... \n\
270 ! ico -r -faces -sleep 1 -obj ico \n\
272 ! xmountains -b -M \n\
273 ! color: xfishtank -c black -d -r 2 \n\
275 ! xtacy is ok, but it only works on the default visual. We can satisfy
276 ! that constraint like so:
278 ! default: "Xtacy (funky)" xtacy -root -delay 100 -funky -number 3 \n\
279 ! default: "Xtacy (grav)" xtacy -root -delay 100 -gravity \n\
280 ! default: "Xtacy (mixer)" xtacy -root -delay 100 -mixer \n\
281 ! default: "Xtacy (taffy)" xtacy -root -delay 100 -taffy -pal 4 \n\
283 ! To display a randomized slideshow of images, you can do something like this:
285 ! default-n: "Slideshow" xv -root -rmode 5 -random -viewonly \
286 ! -wloop -wait 30 $HOME/bitmaps/*.jpg \n\
288 ! or, if you prefer "xli" to "xv", like this: (but note that xli's "-delay"
289 ! option doesn't work in conjunction with "-onroot", so you need to add a
290 ! line for each image individually... "xv" is better in this respect.)
292 ! default-n: xli -quiet -onroot -center -border black \
293 ! $HOME/bitmaps/pic1.jpg \n\
294 ! default-n: xli -quiet -onroot -center -border black \
295 ! $HOME/bitmaps/pic2.jpg \n\
296 ! default-n: xli -quiet -onroot -center -border black \
297 ! $HOME/bitmaps/pic3.jpg \n\
299 ! Note that we've used "default-n" as the visual name, rather than just
300 ! "default": this means "default visual, no install", that is, it's like
301 ! specifying the command-line arguments "-visual default -no-install".
302 ! This is necessary because, when XV or XLI arerunning in "-root" mode, they
303 ! always assume that the default visual and colormap are being used, rather
304 ! than examining the window it is drawing on to see what visual and colormap
305 ! it has. If we didn't force the default visual to be used, we would get an
306 ! X error. If we didn't force the default colormap to be installed, the
307 ! colors would be all wrong. "default-i" may also be used as a visual name
308 ! (meaning, "-visual default -install") but you probably won't ever need
311 ! XEarth is nice, too:
313 ! default-n: xearth -nostars -wait 0 -timewarp 400 -pos sunrel/38/-30
316 ! Some of the GL demos that SGI ships work with XScreenSaver; most don't.
317 ! XScreenSaver includes a program (not built or installed by default)
318 ! called "xscreensaver-sgigl". To use the SGI demos with XScreenSaver,
319 ! build that program, and use it to launch the SGI demos. For example,
320 ! on Irix 6.2, you can do this:
322 ! xscreensaver-sgigl /usr/demos/bin/ep -S
323 ! xscreensaver-sgigl /usr/demos/bin/bongo
325 ! On Irix 6.3, things have moved, so you need to do it like this:
327 ! xscreensaver-sgigl /usr/sbin/ep -S
329 ! You can also use the "ant" demo, but first you need to wrap a shell script
330 ! around it that cds to its home directory, so that it can find its files;
331 ! and also pass it the -S argument, to prevent it from forking.
334 ! Also, since these actually end up mapping their own windows instead of
335 ! drawing on the XScreenSaver-provided root, when they are being run from
336 ! demo-mode, you can't pop up the demo-mode dialog just by clicking the
337 ! mouse: you must first type ESC to make the SGI programs exit. This sucks.
338 ! Things should work properly when they are being run by xscreensaver in
339 ! non-demo-mode, however.
341 ! Basically, the SGI demo writers went out of their way to make my life hell.
345 !=============================================================================
347 ! You probably don't want to change anything after this point.
349 !=============================================================================
352 XScreenSaver.pointerPollTime: 5
353 XScreenSaver.initialDelay: 0
354 XScreenSaver.windowCreationTimeout: 30
355 XScreenSaver.bourneShell: /bin/sh
358 ! Resources for the password and splash-screen dialog boxes of
359 ! the "xscreensaver" daemon.
361 *Dialog.headingFont: *-times-bold-r-*-*-*-180-*-*-*-iso8859-1
362 *Dialog.bodyFont: *-helvetica-bold-r-*-*-*-140-*-*-*-iso8859-1
363 *Dialog.labelFont: *-helvetica-bold-r-*-*-*-140-*-*-*-iso8859-1
364 *Dialog.buttonFont: *-helvetica-bold-r-*-*-*-140-*-*-*-iso8859-1
365 *Dialog.dateFont: *-courier-medium-r-*-*-*-80-*-*-*-iso8859-1
366 *Dialog.foreground: #000000
367 *Dialog.background: #BFBFBF
368 *Dialog.Button.foreground: #000000
369 *Dialog.Button.background: #D0D0D0
370 *Dialog.text.foreground: #000000
371 *Dialog.text.background: #FFFFFF
372 *Dialog.logo.foreground: #FF0000
373 *Dialog.logo.background: #FFFFFF
374 *Dialog.topShadowColor: #E7E7E7
375 *Dialog.bottomShadowColor: #737373
376 *Dialog.logo.width: 200
377 *Dialog.logo.height: 200
378 *Dialog.internalBorderWidth: 30
379 *Dialog.borderWidth: 1
380 *Dialog.shadowThickness: 4
382 *passwd.heading.label: XScreenSaver %s
383 *passwd.body.label: This display is locked.
384 *passwd.user.label: User:
385 *passwd.passwd.label: Password:
386 *passwd.passwdFont: *-courier-medium-r-*-*-*-140-*-*-*-iso8859-1
387 *passwd.thermometer.width: 8
389 *splash.heading.label: XScreenSaver %s
390 *splash.body.label: Copyright © 1991-1999 by
391 *splash.body2.label: Jamie Zawinski <jwz@jwz.org>
392 *splash.demo.label: Demo
393 *splash.prefs.label: Prefs
394 *splash.help.label: Help
397 ! Resources for the Motif dialog boxes of the "xscreensaver-demo" program.
399 *fontList: *-helvetica-medium-r-*-*-*-120-*-*-*-iso8859-1
400 *demoDialog*label1.fontList: *-helvetica-medium-r-*-*-*-140-*-*-*-iso8859-1
401 *XmTextField.fontList: *-courier-medium-r-*-*-*-120-*-*-*-iso8859-1
402 *label0.fontList: *-helvetica-bold-r-*-*-*-140-*-*-*-iso8859-1
403 XScreenSaver*XmList.fontList: *-courier-medium-r-*-*-*-120-*-*-*-iso8859-1
404 ! Need to fully-qualify the preceeding in the case of of *sgiMode.
406 *XmDialogShell*foreground: #000000
407 *XmDialogShell*background: #E5E5E5
408 *XmDialogShell*XmTextField.foreground: #000000
409 *XmDialogShell*XmTextField.background: #FFFFFF
410 *XmDialogShell*demoList.foreground: #000000
411 *XmDialogShell*demoList.background: #FFFFFF
413 *XmDialogShell.title: XScreenSaver
414 *versionWarning_popup.title: XScreenSaver Warning
415 *demoForm_popup.title: XScreenSaver Demo
416 *preferencesForm_popup.title: XScreenSaver Preferences
417 *allowShellResize: True
420 ! This doesn't work. Motif ignores it if there is a scroll-list!
421 *demoDialog.maxWidth: 600
423 *label1.labelString: XScreenSaver %s
424 *label1.label: XScreenSaver %s
425 *label2.labelString: Copyright © 1991-1999 by Jamie Zawinski <jwz@jwz.org>
426 *label2.label: Copyright © 1991-1999 by Jamie Zawinski <jwz@jwz.org>
427 *demoList.visibleItemCount: 10
428 *demoList.automaticSelection: True
429 *next.labelString: Run Next
430 *prev.labelString: Run Previous
431 *edit.labelString: Preferences
432 *restart.labelString: Reinitialize
433 *done.labelString: Quit
435 *preferencesLabel.labelString: XScreenSaver Parameters
437 *timeoutLabel.labelString: Saver Timeout
438 *cycleLabel.labelString: Cycle Timeout
439 *fadeSecondsLabel.labelString: Fade Duration
440 *fadeTicksLabel.labelString: Fade Ticks
441 *lockLabel.labelString: Lock Timeout
442 *passwdLabel.labelString: Password Timeout
443 *preferencesForm*XmTextField.columns: 8
445 *verboseToggle.labelString: Verbose
446 *cmapToggle.labelString: Install Colormap
447 *fadeToggle.labelString: Fade Colormap
448 *unfadeToggle.labelString: Unfade Colormap
449 *lockToggle.labelString: Require Password
450 *preferencesDone.labelString: OK
451 *preferencesCancel.labelString: Cancel
454 ! Disable Motif drag-and-drop in dialog boxes. This is kind of pathetic, but
455 ! in some older versions of Motif, most any attempt to drag cause immediate
456 ! flaming death from above. This *should* rip the legs off that bug.
457 ! (But sadly, Lesstif 0.86 and earlier ignore these resources *and* have
458 ! buggy drag-and-drop.)
460 XScreenSaver*dragInitiatorProtocolStyle: DRAG_NONE
461 XScreenSaver*dragReceiverProtocolStyle: DRAG_NONE
465 ! Resources for the Athena dialog boxes of the "xscreensaver-demo" program.
467 *demo_dialog.title: XScreenSaver Demo
468 *preferences_dialog.title: XScreenSaver Preferences
469 *warning_dialog.title: XScreenSaver Warning
471 ! For some reason, it doesn't size correctly by itself.
472 *demo_dialog.geometry: =640x400
474 *demo_dialog*font: *-helvetica-bold-r-*-*-*-120-*-*-*-iso8859-1
475 *preferences_dialog*font: *-helvetica-bold-r-*-*-*-120-*-*-*-iso8859-1
476 *demo_dialog*label1.font: *-helvetica-bold-r-*-*-*-140-*-*-*-iso8859-1
477 *preferences_dialog*label1.font:*-helvetica-bold-r-*-*-*-140-*-*-*-iso8859-1
478 XScreenSaver*warning_dialog*label0.font: \
479 *-helvetica-bold-r-*-*-*-140-*-*-*-iso8859-1
480 XScreenSaver*warning_dialog*Label.font: \
481 *-helvetica-bold-r-*-*-*-120-*-*-*-iso8859-1
482 XScreenSaver*warning_dialog*Command.font: \
483 *-helvetica-bold-r-*-*-*-140-*-*-*-iso8859-1
484 XScreenSaver.demo_dialog*List.font: \
485 *-courier-medium-r-*-*-*-120-*-*-*-iso8859-1
486 XScreenSaver.demo_dialog*Text*font: \
487 *-courier-medium-r-*-*-*-120-*-*-*-iso8859-1
489 XScreenSaver.demo_dialog*foreground: #000000
490 XScreenSaver.demo_dialog*background: #E5E5E5
491 XScreenSaver.demo_dialog*List.background: #FFFFFF
492 XScreenSaver.demo_dialog*Scrollbar.background: #D9D9D9
493 XScreenSaver.demo_dialog*Command.background: #D9D9D9
494 XScreenSaver.demo_dialog*Text*background: #FFFFFF
496 XScreenSaver.preferences_dialog*foreground: #000000
497 XScreenSaver.preferences_dialog*background: #E5E5E5
498 XScreenSaver.preferences_dialog*Command.background: #D9D9D9
499 XScreenSaver.preferences_dialog*Toggle.background: #D9D9D9
500 XScreenSaver.preferences_dialog*Text*background: #FFFFFF
502 XScreenSaver.warning_dialog*foreground: #000000
503 XScreenSaver.warning_dialog*background: #E5E5E5
504 XScreenSaver.warning_dialog*Command.background: #D9D9D9
506 *preferences_dialog*Dialog.value.translations: #override\n\
507 <Key>Return: beginning-of-line()\n
509 *demo_dialog*viewport.height: 200
512 *Label.borderWidth: 0
513 *preferences_dialog*Dialog.borderWidth: 0
515 *demo_dialog*run.label: Run
516 *demo_dialog*next.label: Run Next
517 *demo_dialog*prev.label: Run Previous
518 *demo_dialog*edit.label: Preferences
519 *demo_dialog*restart.label: Reinitialize
520 *demo_dialog*done.label: Quit
521 XScreenSaver.demo_dialog*Command.internalWidth: 10
522 XScreenSaver.demo_dialog*Command.internalHeight: 4
524 *preferences_dialog*timeout.label: Saver Timeout:
525 *preferences_dialog*cycle.label: Cycle Timeout:
526 *preferences_dialog*fade.label: Fade Duration:
527 *preferences_dialog*ticks.label: Fade Ticks:
528 *preferences_dialog*lockTime.label: Lock Timeout:
529 *preferences_dialog*passwdTime.label: Password Timeout:
530 XScreenSaver.preferences_dialog*Command.internalWidth: 10
531 XScreenSaver.preferences_dialog*Command.internalHeight: 4
533 *preferences_dialog*label1.label: XScreenSaver Parameters
534 *preferences_dialog*buttonbox.verbose.label: Verbose
535 *preferences_dialog*buttonbox.cmap.label: Install Colormap
536 *preferences_dialog*buttonbox.fade.label: Fade Colormap
537 *preferences_dialog*buttonbox.unfade.label: Unfade Colormap
538 *preferences_dialog*buttonbox.lock.label: Require Password
539 *preferences_dialog*done.label: Ok
540 *preferences_dialog*cancel.label: Cancel
542 *warning_dialog*ok.label: Ok
544 *warning_dialog*horizDistance: 30
545 *warning_dialog*vertDistance: 0
547 *warning_dialog*Label.internalWidth: 1
548 *warning_dialog*Label.internalHeight: 0
550 *warning_dialog*label0.horizDistance: 80
551 *warning_dialog*label0.vertDistance: 20
553 *warning_dialog*Command.horizDistance: 160
554 *warning_dialog*Command.vertDistance: 20
555 *warning_dialog*Command.internalWidth: 20
556 *warning_dialog*Command.internalHeight: 5
559 !=============================================================================
561 ! Online documentation for xscreensaver-demo.
563 !=============================================================================
565 ! sanity check -- hands off.
566 *hacks.documentation.isInstalled: True
568 *hacks.grav.documentation: \
569 This program draws a simple orbital simulation. If you turn on \
570 trails, it looks kind of like a cloud-chamber photograph. Written by \
573 *hacks.qix.documentation: \
574 This is the swiss army chainsaw of qix programs. It bounces a series \
575 of line segments around the screen, and uses variations on this basic \
576 motion pattern to produce all sorts of different presentations: line \
577 segments, filled polygons, overlapping translucent areas... Written \
580 *hacks.attraction.documentation: \
581 Like qix, this uses a simple simple motion model to generate many \
582 different display modes. The control points attract each other up to \
583 a certain distance, and then begin to repel each other. The \
584 attraction/repulsion is proportional to the distance between any two \
585 particles, similar to the strong and weak nuclear forces. \
587 One of the most interesting ways to watch this hack is simply as \
588 bouncing balls, because their motions and interactions with each \
589 other are so odd. Sometimes two balls will get into a tight orbit \
590 around each other, to be interrupted later by a third, or by the edge \
591 of the screen. It looks quite chaotic. \
593 Written by Jamie Zawinski, based on Lisp code by John Pezaris.
595 *hacks.pyro.documentation: \
596 Pyro draws exploding fireworks. Blah blah blah. Written by Jamie \
599 *hacks.helix.documentation: \
600 This repeatedly generates spirally string-art-ish patterns. Written \
603 *hacks.pedal.documentation: \
604 This is sort of a combination spirograph/string-art. It generates a \
605 large, complex polygon, and lets the X server do the bulk of the work \
606 by giving it an even/odd winding rule. Written by Dale Moore, based \
607 on some ancient PDP-11 code.
609 *hacks.rorschach.documentation: \
610 This generates random inkblot patterns. The algorithm is deceptively \
611 simple for how well it works; it merely walks a dot around the screen \
612 randomly, and then reflects the image horizontally, vertically, or \
613 both. Any deep-seated neurotic tendencies which this program reveals \
614 are your own problem. Written by Jamie Zawinski.
616 *hacks.hopalong.documentation: \
617 This draws lacy fractal patterns, based on iteration in the imaginary \
618 plane, from a 1986 Scientific American article. Mostly written by \
621 *hacks.greynetic.documentation: \
622 This draws random colored and stippled rectangles. Written by Jamie \
625 *hacks.xroger.documentation: \
626 The XScreenSaver logo. Don't you hate it? So do I. Would you like \
627 to design a new logo for XScreenSaver? If so, send jwz your \
630 *hacks.imsmap.name: IMSmap
631 *hacks.imsmap.documentation: \
632 This generates random cloud-like patterns. It looks quite different \
633 in monochrome and color. The basic idea is to take four points on \
634 the edge of the image, and assign each a random ``elevation''. Then \
635 find the point between them, and give it a value which is the average \
636 of the other four, plus some small random offset. Then coloration is \
637 done based on elevation. \
639 The color selection is done by binding the elevation to either hue, \
640 saturation, or brightness, and assigning random values to the others. \
641 The ``brightness'' mode tends to yield cloudlike patterns, and the \
642 others tend to generate images that look like heat-maps or CAT-scans. \
643 Written by Juergen Nickelsen and Jamie Zawinski.
645 *hacks.slidescreen.name: SlideScreen
646 *hacks.slidescreen.documentation: \
647 This grabs an image of whatever is on your screen, divides it into a \
648 grid, and then randomly shuffles the squares around as if it was one \
649 of those annoying ``16-puzzle'' games, where there is a grid of \
650 squares, one of which is missing. I hate trying to solve those \
651 puzzles, but watching one permute itself is more amusing. Written by \
654 *hacks.decayscreen.name: DecayScreen
655 *hacks.decayscreen.documentation: \
656 This grabs an image of whatever is on your screen, and makes it melt. \
657 You've no doubt seen this effect before, but no screensaver would \
658 really be complete without it. It works best if there's something \
659 colorful visible. Warning, if the effect continues after the screen \
660 saver is off, seek medical attention. Written by David Wald and \
663 A number of these screenhacks have the ability to take an image of \
664 your desktop and manipulate it in some way. On SGI systems, these \
665 programs are able to (at random) pull their source image from the \
666 system's video input instead! This works nicely if you leave some \
667 some random television station plugged in.
669 *hacks.jigsaw.documentation: \
670 This grabs a screen image, carves it up into a jigsaw puzzle, \
671 shuffles it, and then solves the puzzle. This works especially well \
672 when you feed it an external video signal instead of letting it grab \
673 the screen image (actually, I guess this is generally true...) When \
674 it is grabbing a video image, it is sometimes pretty hard to guess \
675 what the image is going to look like once the puzzle is solved. \
676 Written by Jamie Zawinski.
678 *hacks.blitspin.name: BlitSpin
679 *hacks.blitspin.documentation: \
680 The ``blitspin'' hack repeatedly rotates a bitmap by 90 degrees by \
681 using logical operations: the bitmap is divided into quadrants, and \
682 the quadrants are shifted clockwise. Then the same thing is done \
683 again with progressively smaller quadrants, except that all \
684 sub-quadrants of a given size are rotated in parallel. Written by \
685 Jamie Zawinski based on some cool SmallTalk code seen in in Byte \
688 As you watch it, the image appears to dissolve into static and then \
689 reconstitute itself, but rotated. You can provide the image to use, \
690 as an XBM or XPM file, or tell it to grab a screen image and rotate \
693 *hacks.slip.documentation: \
694 This program throws some random bits on the screen, then sucks them \
695 through a jet engine and spews them out the other side. To avoid \
696 turning the image completely to mush, every now and then it will and \
697 then it interjects some splashes of color into the scene, or go into \
698 a spin cycle, or stretch the image like taffy, or (this is my \
699 addition) grab an image of your current desktop to chew on. \
700 Originally written by Scott Draves; whacked on by Jamie Zawinski.
702 *hacks.distort.documentation: \
703 This hack grabs an image of the screen, and then lets a transparent \
704 lens wander around the screen, magnifying whatever is underneath. \
705 Written by Jonas Munsin.
707 *hacks.spotlight.documentation: \
708 Draws a spotlight scanning across a black screen, illumnating the \
709 underlying desktop when it passes. Written by Rick Schultz.
711 *hacks.hypercube.documentation: \
712 This displays 2D projections of the sequence of 3D objects which are \
713 the projections of the 4D analog to the cube: as a square is composed \
714 of four lines, each touching two others; and a cube is composed of \
715 six squares, each touching four others; a hypercube is composed of \
716 eight cubes, each touching six others. To make it easier to \
717 visualize the rotation, it uses a different color for the edges of \
718 each face. Don't think about it too long, or your brain will melt. \
719 Written by Joe Keane, Fritz Mueller, and Jamie Zawinski.
721 *hacks.halo.documentation: \
722 This draws trippy psychedelic circular patterns that hurt to look at. \
723 It can also animate the control-points, but that takes a lot of CPU \
724 and bandwidth. Written by Jamie Zawinski.
726 *hacks.maze.documentation: \
727 This is the ancient X maze demo, modified to work with xscreensaver. \
728 It generates a random maze, then solves it with visual feedback. \
729 Originally by Jim Randell; modified by a cast of thousands.
731 *hacks.noseguy.documentation: \
732 A little man with a big nose wanders around your screen saying \
733 things. The things which he says can come from a file, or from an \
734 external program like `zippy' or `fortune'. This was extracted from \
735 `xnlock' by Dan Heller. Colorized by Jamie Zawinski.
737 *hacks.flame.documentation: \
738 Another iterative fractal generator. Written by Scott Draves.
740 *hacks.lmorph.name: LMorph
741 *hacks.lmorph.documentation: \
742 This generates random spline-ish line drawings and morphs between \
743 them. Written by Sverre H. Huseby and Glenn T. Lines.
745 *hacks.deco.documentation: \
746 This one subdivides and colors rectangles randomly. It looks kind of \
747 like Brady-Bunch-era rec-room wall paneling. (Raven says: ``this \
748 screensaver is ugly enough to peel paint.'') Written by Jamie \
749 Zawinski, inspired by Java code by Michael Bayne.
751 *hacks.moire.documentation: \
752 This one draws cool circular interference patterns. Most of the \
753 circles you see aren't explicitly rendered, but show up as a result \
754 of interactions between the other pixels that were drawn. Written by \
755 Jamie Zawinski, inspired by Java code by Michael Bayne. As he \
756 pointed out, the beauty of this one is that the heart of the display \
757 algorithm can be expressed with just a pair of loops and a handful of \
758 arithmetic, giving it a high ``display hack metric''.
760 *hacks.moire2.documentation: \
761 Another example of the fun you can have with moire \
762 interference patterns; this hack generates fields of concentric \
763 circles or ovals, and combines the planes with various operations. \
764 The planes are moving independently of one another, causing the \
765 interference lines to ``spray.'' Written by Jamie Zawinski.
767 *hacks.lightning.documentation: \
768 This one draws crackling fractal lightning bolts. It's simple, \
769 direct, and to the point. If only it had sound... Written by Keith \
772 *hacks.strange.documentation: \
773 This draws strange attractors: it's a colorful, \
774 unpredictably-animating field of dots that swoops and twists around. \
775 The motion is very nice. Written by Massimino Pascal.
777 *hacks.spiral.documentation: \
778 Moving circular patterns, by Peter Schmitzberger. Moving circular \
779 patterns means moire; interference patterns, of course.
781 *hacks.laser.documentation: \
782 Moving radiating lines, that look vaguely like scanning laser beams. \
783 Written by Pascal Pensa. (Frankie say: relax.)
785 *hacks.grav.documentation: \
786 This program draws a simple orbital simulation. If you turn on \
787 trails, it looks kind of like a cloud-chamber photograph. Written \
790 *hacks.drift.documentation: \
791 How could one possibly describe this except as ``drifting recursive \
792 fractal cosmic flames?'' Another fine hack from the Scott Draves \
793 collection of fine hacks.
796 *hacks.ifs.documentation: \
797 This one draws spinning, colliding iterated-function-system images. \
798 Written by Massimino Pascal.
800 *hacks.julia.documentation: \
801 This one draws spinning, animating (are you detecting a pattern here \
802 yet?) explorations of the Julia set. You've probably seen static \
803 images of this fractal form before, but it's a lot of fun to watch in \
804 motion as well. One interesting thing is that there is a small \
805 swinging dot passing in front of the image, which indicates the \
806 control point from which the rest of the image was generated. \
807 Written by Sean McCullough.
809 *hacks.penrose.documentation: \
810 Draws quasiperiodic tilings; think of the implications on modern \
811 formica technology. Written by Timo Korvola. \
813 In April 1997, Sir Roger Penrose, a British math professor who has \
814 worked with Stephen Hawking on such topics as relativity, black \
815 holes, and whether time has a beginning, filed a \
816 copyright-infringement lawsuit against the Kimberly-Clark \
817 Corporation, which Penrose said copied a pattern he created (a \
818 pattern demonstrating that ``a nonrepeating pattern could exist in \
819 nature'') for its Kleenex quilted toilet paper. Penrose said he \
820 doesn't like litigation but, ``When it comes to the population of \
821 Great Britain being invited by a multinational to wipe their bottoms \
822 on what appears to be the work of a Knight of the Realm, then a last \
823 stand must be taken.'' \
825 As reported by News of the Weird #491, 4-jul-1997.
827 *hacks.sierpinski.documentation: \
828 This draws the two-dimensional variant of the recursive Sierpinski \
829 triangle fractal. Written by Desmond Daignault.
831 *hacks.braid.documentation: \
832 Draws random color-cycling inter-braided concentric circles. Written \
835 *hacks.galaxy.documentation: \
836 This draws spinning galaxies, which then collide and scatter their \
837 stars to the, uh, four winds or something. Originally an Amiga \
838 program by Uli Siegmund.
840 *hacks.bouboule.documentation: \
841 This draws what looks like a spinning, deforming baloon with \
842 varying-sized spots painted on its invisible surface. Written by \
845 *hacks.swirl.documentation: \
846 More flowing, swirly patterns. This version is by M. Dobie and R. \
847 Taylor, but you might have seen a Mac program similar to this called \
848 FlowFazer. There is also a cool Java applet of a similar concept
850 *hacks.flag.documentation: \
851 This draws a waving colored flag, that undulates its way around the \
852 screen. The trick is the flag can contain arbitrary text and images. \
853 By default, it displays either the current system name and OS \
854 type, or a picture of ``Bob,'' but you can replace the text or the \
855 image with a command-line option. Written by Charles Vidal and Jamie \
858 *hacks.sphere.documentation: \
859 Another of the classic screenhacks of the distant past, this one \
860 draws shaded spheres in multiple colors. This hack traces its \
861 lineage back to Tom Duff in 1982.
863 *hacks.forest.documentation: \
864 This draws fractal trees. Written by Peter Baumung. Everybody loves \
867 *hacks.lisa.documentation: \
868 This draws Lisajous loops, by Caleb Cullen. Remember that device \
869 they had the Phantom Zone prisoners in during their trial in \
870 Superman? I think that was one of these.
872 *hacks.lissie.documentation: \
873 Another Lissajous figure. This one draws the progress of circular \
874 shapes along a path. Written by Alexander Jolk.
876 *hacks.goop.documentation: \
877 This draws set of animating, transparent, amoeba-like blobs. The \
878 blobs change shape as they wander around the screen, and they are \
879 translucent, so you can see the lower blobs through the higher ones, \
880 and when one passes over another, their colors merge. Written by \
881 Jamie Zawinski. I got the idea for this from a cool mouse pad I \
882 have, which achieves the same kind of effect in real life by having \
883 several layers plastic with colored oil between them. Written by \
886 *hacks.starfish.documentation: \
887 This generates a sequence of undulating, throbbing, star-like \
888 patterns which pulsate, rotate, and turn inside out. Another display \
889 mode uses these shapes to lay down a field of colors, which are then \
890 cycled. The motion is very organic. Written by Jamie Zawinski.
892 *hacks.munch.documentation: \n\
899 As reported by HAKMEM, in 1962, Jackson Wright wrote the above PDP-1 \
900 code. That code still lives on in this screenhack, some 35 years \
901 later. The number of lines of enclosing code has increased \
902 substantially, however. This version is by Tim Showalter.
904 *hacks.fadeplot.name: FadePlot
905 *hacks.fadeplot.documentation: \
906 Draws what looks like a waving ribbon following a sinusoidal path. \
907 Written by Bas van Gaalen and Charles Vidal.
909 *hacks.coral.documentation: \
910 Simulates coral growth, albeit somewhat slowly. This image doesn't \
911 really do it justice. Written by Frederick Roeber.
913 *hacks.mountain.documentation: \
914 Generates random 3d plots that look vaguely mountainous. Written by \
917 *hacks.triangle.documentation: \
918 Generates random mountain ranges using iterative subdivision of \
919 triangles. Written by Tobias Gloth.
921 *hacks.worm.documentation: \
922 An ancient xlock hack that draws multicolored worms that crawl around \
923 the screen. Written by Brad Taylor, Dave Lemke, Boris Putanec, and \
926 *hacks.rotor.documentation: \
927 Another ancient xlock demo, this one by Tom Lawrence. It draws a \
928 line segment moving along a complex spiraling curve. I tweaked this \
929 to generate curvier lines, but still frames of it don't look like \
932 *hacks.ant.documentation: \
933 A cellular automaton that is really a two-dimensional Turing machine: \
934 as the heads (``ants'') walk along the screen, they change pixel \
935 values in their path. Then, as they pass over changed pixels, their \
936 behavior is influenced. Written by David Bagley.
938 *hacks.demon.documentation: \
939 A cellular automaton that starts with a random field, and organizes \
940 it into stripes and spirals. Written by David Bagley.
942 *hacks.loop.documentation: \
943 This one produces loop-shaped colonies that spawn, age, and \
944 eventually die. Written by David Bagley.
946 *hacks.vines.documentation: \
947 This one generates a continuous sequence of small, curvy geometric \
948 patterns. It scatters them around your screen until it fills up, \
949 then it clears the screen and starts over. Written by Tracy Camp and \
952 *hacks.kaleidescope.documentation: \
953 Another clone of an ancient meme, consisting largely of frenetic \
954 rotational motion of colored lines. This one is by Ron Tapia. The \
955 motion is nice, but I think it needs more solids, or perhaps just \
956 brighter colors. More variations in the rotational speed might help, \
959 *hacks.xjack.documentation: \
960 This program behaves schizophrenically and makes a lot of typos. \
961 Written by Jamie Zawinski. If you haven't seen Stanley Kubrick's \
962 masterpiece, ``The Shining,'' you won't get it. Those who have \
963 describe this hack as ``inspired.''
965 *hacks.xlyap.documentation: \
966 This generates pretty fractal pictures by doing funky math involving \
967 the ``Lyapunov exponent.'' It has a cool interactive mode, too. \
968 Written by Ron Record.
970 *hacks.cynosure.documentation: \
971 A hack similar to `greynetic', but less frenetic. The first \
972 implementation was by Stephen Linhart; then Ozymandias G. Desiderata \
973 wrote a Java applet clone. That clone was discovered by Jamie \
974 Zawinski, and ported to C for inclusion here.
976 *hacks.flow.documentation: \
977 Another series of strange attractors: a flowing series of points, \
978 making strange rotational shapes. Written by Jeff Butterworth.
980 *hacks.epicycle.documentation: \
981 This program draws the path traced out by a point on the edge of a \
982 circle. That circle rotates around a point on the rim of another \
983 circle, and so on, several times. These were the basis for the \
984 pre-heliocentric model of planetary motion. Written by James \
987 *hacks.interference.documentation: \
988 Another color-field hack, this one works by computing decaying \
989 sinusoidal waves, and allowing them to interfere with each other as \
990 their origins move. Written by Hannu Mallat.
992 *hacks.truchet.documentation: \
993 This draws line- and arc-based Truchet patterns that tile the screen. \
994 Written by Adrian Likins.
996 *hacks.bsod.name: BSOD
997 *hacks.bsod.documentation: \
998 BSOD stands for ``Blue Screen of Death.'' The finest in personal \
999 computer emulation, this hack simulates popular screen savers from a \
1000 number of less robust operating systems. Written by Jamie Zawinski.
1002 *hacks.crystal.documentation: \
1003 Moving polygons, similar to a kaleidescope (more like a kaleidescope \
1004 than the hack called `kaleid,' actually.) This one by Jouk Jansen.
1006 *hacks.discrete.documentation: \
1007 More ``discrete map'' systems, including new variants of Hopalong and \
1008 Julia, and a few others. Written by Tim Auckland.
1010 *hacks.kumppa.documentation: \
1011 Spiraling, spinning, and very, very fast splashes of color rush \
1012 toward the screen. Written by Teemu Suutari.
1014 *hacks.rd-bomb.name: RD-Bomb
1015 *hacks.rd-bomb.documentation: \
1016 Another variation of the `Bomb' program by Scott Draves. This draws \
1017 a grid of growing square-like shapes that, once they overtake each \
1018 other, react in unpredictable ways. ``RD'' stands for \
1021 *hacks.sonar.documentation: \
1022 This program draws a simulation of a sonar screen. Written by \
1023 default, it displays a random assortment of ``bogies'' on the screen, \
1024 but if compiled properly, it can ping (pun intended) your local \
1025 network, and actually plot the proximity of the other hosts on your \
1026 network to you. It would be easy to make it monitor other sources of \
1027 data, too. (Processes? Active network connections? CPU usage per \
1028 user?) Written by Stephen Martin.
1030 *hacks.t3d.name: T3D
1031 *hacks.t3d.documentation: \
1032 This draws a working analog clock composed of floating, throbbing \
1033 bubbles. Written by Bernd Paysan.
1035 *hacks.penetrate.documentation: \
1036 This hack simulates the classic arcade game Missile Command. Written \
1039 *hacks.deluxe.documentation: \
1040 This draws a pulsing sequence of stars, circles, and lines. It would \
1041 look better if it was faster, but as far as I can tell, there is no \
1042 way to make this be both: fast, and flicker-free. Yet another reason \
1043 X sucks. Written by Jamie Zawinski.
1045 *hacks.compass.documentation: \
1046 This draws a compass, with all elements spinning about randomly, for \
1047 that ``lost and nauseous'' feeling. Written by Jamie Zawinski.
1049 *hacks.squiral.documentation: \
1050 Draws a set of interacting, square-spiral-producing automata. The \
1051 spirals grow outward until they hit something, then they go around \
1052 it. Written by Jeff Epler.
1054 *hacks.xflame.documentation: \
1055 Draws a simulation of pulsing fire. It can also take an arbitrary \
1056 image and set it on fire too. Written by Carsten Haitzler, hacked on \
1059 *hacks.wander.documentation: \
1060 Draws a colorful random-walk, in various forms. Written by Rick \
1063 *hacks.critical.documentation: \
1064 Draws a system of self-organizing lines. It starts out as random \
1065 squiggles, but after a few iterations, order begins to appear. \
1066 Written by Martin Pool.
1068 *hacks.phosphor.documentation: \
1069 Draws a simulation of an old terminal, with large pixels and \
1070 long-sustain phosphor. It can run any program as a source of the text \
1071 it displays. Written by Jamie Zawinski.
1073 *hacks.xmatrix.documentation: \
1074 A rendition of the text scrolls seen in the movie ``The Matrix.'' \
1075 Written by Jamie Zawinski.
1077 *hacks.petri.documentation: \
1078 This simulates colonies of mold growing in a petri dish. Growing \
1079 colored circles overlap and leave spiral interference in their wake. \
1080 Written by Dan Bornstein.
1082 *hacks.shadebobs.name: ShadeBobs
1083 *hacks.shadebobs.documentation: \
1084 This draws smoothly-shaded oscilating oval patterns, that look \
1085 something like vapor trails or neon tubes. Written by Shane Smit.
1087 *hacks.ccurve.name: C Curve
1088 *hacks.ccurve.documentation: \
1089 Generates self-similar linear fractals, including the classic ``C \
1090 Curve.'' Written by Rick Campbell.
1092 *hacks.blaster.documentation: \
1093 Draws a simulation of flying space-combat robots (cleverly disguised \
1094 as colored circles) doing battle in front of a moving star field. \
1095 Written by Jonathan Lin.
1097 *hacks.bumps.documentation: \
1098 A bit like `Spotlight', except that instead of merely exposing part \
1099 of your desktop, it creates a bump map from it. Basically, it \
1100 3D-izes a roaming section of your desktop, based on color intensity. \
1101 Written by Shane Smit.
1103 *hacks.webcollage.name: WebCollage
1104 *hacks.webcollage.documentation: \
1105 This program makes collages out of random images pulled off of the \
1106 World Wide Web. It finds these images by doing random web searches, \
1107 and then extracting images from the returned pages. It can also be \
1108 set up to filter the images through the `VidWhacker' program, above, \
1109 which looks really great. \
1111 (Note that most of the images it finds are text, and not pictures. \
1112 This is because most of the web is pictures of text. Which is pretty \
1113 sad.) Written by Jamie Zawinski.
1115 *hacks.vidwhacker.name: VidWhacker
1116 *hacks.vidwhacker.documentation: \
1117 This is actually just a shell script that grabs a frame of video from \
1118 the system's video input, and then uses some PBM filters (chosen at \
1119 random) to manipulate and recombine the video frame in various ways \
1120 (edge detection, subtracting the image from a rotated version of \
1121 itself, etc.) Then it displays that image for a few seconds, and \
1122 does it again. This works really well if you just feed broadcast \
1123 television into it. \
1125 Currently, the three lines of the script that actually grab the \
1126 source picture are SGI specific, but it should be trivial to adapt it \
1127 to work on other systems that can grab video (please send me the \
1128 changes if you do this...)
1130 *hacks.rocks.documentation: \
1131 This draws an animation of flight through an asteroid field, with \
1132 changes in rotation and direction. It can also display 3D \
1133 separations for red/blue glasses! Mostly written by Jamie Zawinski.
1135 *hacks.bubbles.documentation: \
1136 This simulates the kind of bubble formation that happens when water \
1137 boils:small bubbles appear, and as they get closer to each other, \
1138 they combine to form larger bubbles, which eventually pop. Written \
1141 *hacks.gears.documentation: \
1142 This draws a set of turning, interlocking gears, rotating in three \
1143 dimensions. Another GL hack, by Danny Sung, Brian Paul, and Ed \
1146 *hacks.superquadrics.documentation: \
1147 Ed Mackey reports that he wrote the first version of this program in \
1148 BASIC on a Commodore 64 in 1987, as a 320x200 black and white \
1149 wireframe. Now it is GL and has specular reflections.
1151 *hacks.morph3d.name: Morph3D
1152 *hacks.morph3d.documentation: \
1153 Another 3d shape-changing GL hack, by Marcelo Vianna. It has the \
1154 same shiny-plastic feel as Superquadrics, as many computer-generated \
1157 *hacks.cage.documentation: \
1158 This draws Escher's ``Impossible Cage,'' a 3d analog of a moebius \
1159 strip, and rotates it in three dimensions. Written by Marcelo \
1162 *hacks.moebius.documentation: \
1163 Another M. C. Escher hack by Marcelo Vianna, this one draws \
1164 ``Moebius Strip II,'' a GL image of ants walking along the surface of \
1167 *hacks.stairs.documentation: \
1168 by Marcelo Vianna's third Escher GL hack, this one draws an \
1169 ``infinite'' staircase.
1171 *hacks.pipes.documentation: \
1172 If you've ever been in the same room with a Windows NT machine, \
1173 you've probably seen this GL hack. This version is by Marcelo \
1176 *hacks.sproingies.documentation: \
1177 Q-Bert meets Marble Madness! Written by Ed Mackey.
1179 *hacks.rubik.documentation: \
1180 Draws a Rubik's Cube that rotates in three dimensions and repeatedly \
1181 shuffles and solves itself. Another fine GL hack by Marcelo Vianna.
1183 *hacks.atlantis.documentation: \
1184 This is xfishtank writ large: a GL animation of a number of sharks, \
1185 dolphins, and whales. The swimming motions are great. Originally \
1186 written by Mark Kilgard.
1188 *hacks.lament.documentation: \
1189 Animates a simulation of Lemarchand's Box, repeatedly solving itself. \
1190 Requires OpenGL, and a machine with fast hardware support for texture \
1191 maps. Warning: occasionally opens doors. Written by Jamie Zawinski.
1193 *hacks.bubble3d.name: Bubble3D
1194 *hacks.bubble3d.documentation: \
1195 Draws a stream of rising, undulating 3D bubbles, rising toward the \
1196 top of the screen, with nice specular reflections. Written by Richard \
1199 *hacks.glplanet.name: GLPlanet
1200 *hacks.glplanet.documentation: \
1201 Draws a planet bouncing around in space. Written by David Konerding. \
1202 The built-in image is a map of the earth (extracted from `xearth'), \
1203 but you can wrap any texture around the sphere, e.g., the planetary \
1204 textures that come with `ssystem'.
1206 *hacks.pulsar.documentation: \
1207 Draws some intersecting planes, making use of alpha blending, fog, \
1208 textures, and mipmaps, plus a ``frames per second'' meter so that you \
1209 can tell how fast your graphics card is... Requires OpenGL. Written \
1212 *hacks.extrusion.documentation: \
1213 Draws various rotating extruded shapes that twist around, lengthen, \
1214 and turn inside out. Created by David Konerding from the samples \
1215 that come with the GL Extrusion library by Linas Vepstas.
1217 *hacks.sierpinski3d.name: Sierpinski3D
1218 *hacks.sierpinski3d.documentation: \
1219 This draws the three-dimensional variant of the recursive Sierpinski \
1220 triangle fractal, using GL. Written by Tim Robinson.
1222 *hacks.ripples.documentation: \
1223 This draws rippling interference patterns like splashing water. \
1224 With the -water option, it manipulates your desktop image to look \
1225 like something is dripping into it. Written by Tom Hammersley.
1228 !=============================================================================
1230 ! Documentation for some programs that are not bundled with XScreenSaver
1232 !=============================================================================
1234 *hacks.xdaliclock.name: XDaliClock
1235 *hacks.xdaliclock.documentation: \
1236 XDaliClock draws a large digital clock, the numbers of which change by \
1237 ``melting'' into their new shapes. Written by Jamie Zawinski.
1239 *hacks.xearth.documentation: \
1240 XEarth draws an image of the Earth, as seen from your favorite vantage \
1241 point in space, correctly shaded for the current position of the Sun. \
1242 Written by Kirk Johnson.
1244 *hacks.ssystem.name: SSystem
1245 *hacks.ssystem.documentation: \
1246 SSystem is a GL Solar System simulator. It simulates flybys of Sun, \
1247 the nine planets and a few major satellites, with four camera modes. \
1248 Written by Raul Alonso.
1250 *hacks.xmountains.documentation: \
1251 XMountains generates realistic-looking fractal terrains of snow-capped \
1252 mountains near water, with either a top view or a side view. \
1253 Written by Stephen Booth.