17 "*captureStderr: True",
18 "*overlayTextForeground: #FFFF00",
19 "*overlayTextBackground: #000000",
20 "*overlayStderr: True",
21 "*font: *-medium-r-*-140-*-m-*",
22 "*sgiSaverExtension: True",
23 "*mitSaverExtension: False",
24 "*xidleExtension: True",
25 "*procInterrupts: True",
26 "*demoCommand: xscreensaver-demo",
27 "*prefsCommand: xscreensaver-demo -prefs",
28 "*helpURL: http://www.jwz.org/xscreensaver/man.html",
29 "*loadURL: netscape -remote 'openURL(%s)' || netscape '%s'",
30 "*manualCommand: xterm +sb -fg black -bg gray75 -T '%s manual' \
31 -e /bin/sh -c 'man \"%s\" || read'",
32 "*dateFormat: %d-%b-%y (%a); %I:%M %p",
33 "*installColormap: True",
35 \"Qix (solid)\" qix -root -solid -delay 0 -segments 100 \\n\
36 \"Qix (transparent)\" qix -root -count 4 -solid -transparent \\n\
37 \"Qix (linear)\" qix -root -count 5 -solid -transparent \
38 -linear -segments 250 -size 100 \\n\
39 - mono: \"Qix (xor)\" qix -root -linear -count 5 -size 200 \
40 -spread 30 -segments 75 -solid -xor \\n\
42 \"Attraction (balls)\" attraction -root -mode balls \\n\
43 \"Attraction (lines)\" attraction -root -mode lines -points 3 \
45 - \"Attraction (poly)\" attraction -root -mode polygons \\n\
46 \"Attraction (splines)\" attraction -root -mode splines -segments \
48 \"Attraction (orbital)\" attraction -root -mode lines -radius 300 \
49 -orbit -vmult 0.5 \\n\
55 rorschach -root -offset 7 \\n\
60 slidescreen -root \\n\
61 decayscreen -root \\n\
63 blitspin -root -grab \\n\
67 \"Ripples (oily)\" ripples -root -oily -light 2 \\n\
68 \"Ripples (stir)\" ripples -root -oily -light 2 -stir \\n\
69 \"Ripples (desktop)\" ripples -root -water -light 6 \\n\
84 \"Grav (trails)\" grav -root -trail -decay \\n\
99 goop -root -max-velocity 0.5 -elasticity \
102 \"Starfish (blob)\" starfish -root -blob \\n\
105 coral -root -delay 0 \\n\
107 triangle -root -delay 1 \\n\
114 kaleidescope -root \\n\
116 xlyap -root -randomize \\n\
120 interference -root \\n\
121 truchet -root -randomize \\n\
127 \"RD-Bomb (mobile)\" rd-bomb -root -speed 1 -size 0.1 \\n\
136 \"Wander (spots)\" wander -root -advance 0 -size 10 -circles \
137 True -length 10000 -reset 100000 \\n\
141 petri -root -size 2 -count 20 \\n\
142 \"Petri 2\" petri -root -minlifespeed 0.02 \
143 -maxlifespeed 0.03 -minlifespan 1 \
144 -maxlifespan 1 -instantdeathchan 0 \
145 -minorchan 0 -anychan 0.3 \\n\
150 color: bubbles -root \\n\
151 default-n: webcollage -root \\n\
152 default-n: \"WebCollage (whacked)\" \
153 webcollage -root -filter \
154 'vidwhacker -stdin -stdout' \\n\
155 - default-n: vidwhacker -root \\n\
158 GL: superquadrics -root \\n\
159 GL: morph3d -root \\n\
161 GL: moebius -root \\n\
162 GL: stairs -root \\n\
164 GL: sproingies -root \\n\
166 GL: atlantis -root \\n\
167 GL: lament -root \\n\
168 GL: bubble3d -root \\n\
169 GL: glplanet -root \\n\
170 GL: pulsar -root \\n\
171 - GL: \"Pulsar (textures)\" \
172 pulsar -root -texture -mipmap \
173 -texture_quality -light -fog \\n\
174 GL: extrusion -root \\n\
175 GL: sierpinski3d -root \\n\
177 - xdaliclock -root -builtin3 -cycle \\n\
178 - default-n: xearth -nofork -nostars -ncolors 50 \
179 -night 3 -wait 0 -timewarp 400.0 -pos \
181 - ssystem -fullscreen :32 \\n\
182 - xmountains -b -M -Z 0 -r 1 \\n\
183 - \"XMountains (top)\" xmountains -b -M -Z 0 -r 1 -m \\n\
184 - xaos -root -autopilot -incoloring -1 \
185 -nogui -outcoloring -1 \\n\
187 "XScreenSaver.pointerPollTime: 5",
188 "XScreenSaver.initialDelay: 0",
189 "XScreenSaver.windowCreationTimeout: 30",
190 "XScreenSaver.bourneShell: /bin/sh",
191 "*Dialog.headingFont: *-times-bold-r-*-*-*-180-*-*-*-iso8859-1",
192 "*Dialog.bodyFont: *-helvetica-bold-r-*-*-*-140-*-*-*-iso8859-1",
193 "*Dialog.labelFont: *-helvetica-bold-r-*-*-*-140-*-*-*-iso8859-1",
194 "*Dialog.buttonFont: *-helvetica-bold-r-*-*-*-140-*-*-*-iso8859-1",
195 "*Dialog.dateFont: *-courier-medium-r-*-*-*-80-*-*-*-iso8859-1",
196 "*Dialog.foreground: #000000",
197 "*Dialog.background: #BFBFBF",
198 "*Dialog.Button.foreground: #000000",
199 "*Dialog.Button.background: #D0D0D0",
200 "*Dialog.text.foreground: #000000",
201 "*Dialog.text.background: #FFFFFF",
202 "*Dialog.logo.foreground: #FF0000",
203 "*Dialog.logo.background: #FFFFFF",
204 "*Dialog.topShadowColor: #E7E7E7",
205 "*Dialog.bottomShadowColor: #737373",
206 "*Dialog.logo.width: 200",
207 "*Dialog.logo.height: 200",
208 "*Dialog.internalBorderWidth: 30",
209 "*Dialog.borderWidth: 1",
210 "*Dialog.shadowThickness: 4",
211 "*passwd.heading.label: XScreenSaver %s",
212 "*passwd.body.label: This display is locked.",
213 "*passwd.user.label: User:",
214 "*passwd.passwd.label: Password:",
215 "*passwd.passwdFont: *-courier-medium-r-*-*-*-140-*-*-*-iso8859-1",
216 "*passwd.thermometer.width: 8",
217 "*splash.heading.label: XScreenSaver %s",
218 "*splash.body.label: Copyright © 1991-1999 by",
219 "*splash.body2.label: Jamie Zawinski <jwz@jwz.org>",
220 "*splash.demo.label: Demo",
221 "*splash.prefs.label: Prefs",
222 "*splash.help.label: Help",
223 "*fontList: *-helvetica-medium-r-*-*-*-120-*-*-*-iso8859-1",
224 "*demoDialog*label1.fontList: *-helvetica-medium-r-*-*-*-140-*-*-*-iso8859-1",
225 "*XmTextField.fontList: *-courier-medium-r-*-*-*-120-*-*-*-iso8859-1",
226 "*label0.fontList: *-helvetica-bold-r-*-*-*-140-*-*-*-iso8859-1",
227 "XScreenSaver*XmList.fontList: *-courier-medium-r-*-*-*-120-*-*-*-iso8859-1",
228 "*XmDialogShell*foreground: #000000",
229 "*XmDialogShell*background: #E5E5E5",
230 "*XmDialogShell*XmTextField.foreground: #000000",
231 "*XmDialogShell*XmTextField.background: #FFFFFF",
232 "*XmDialogShell*demoList.foreground: #000000",
233 "*XmDialogShell*demoList.background: #FFFFFF",
234 "*XmDialogShell.title: XScreenSaver",
235 "*versionWarning_popup.title: XScreenSaver Warning",
236 "*demoForm_popup.title: XScreenSaver Demo",
237 "*preferencesForm_popup.title: XScreenSaver Preferences",
238 "*allowShellResize: True",
239 "*autoUnmanage: False",
240 "*demoDialog.maxWidth: 600",
241 "*label1.labelString: XScreenSaver %s",
242 "*label1.label: XScreenSaver %s",
243 "*label2.labelString: Copyright © 1991-1999 by Jamie Zawinski <jwz@jwz.org>",
244 "*label2.label: Copyright © 1991-1999 by Jamie Zawinski <jwz@jwz.org>",
245 "*demoList.visibleItemCount: 10",
246 "*demoList.automaticSelection: True",
247 "*next.labelString: Run Next",
248 "*prev.labelString: Run Previous",
249 "*edit.labelString: Preferences",
250 "*restart.labelString: Reinitialize",
251 "*done.labelString: Quit",
252 "*preferencesLabel.labelString: XScreenSaver Parameters",
253 "*timeoutLabel.labelString: Saver Timeout",
254 "*cycleLabel.labelString: Cycle Timeout",
255 "*fadeSecondsLabel.labelString: Fade Duration",
256 "*fadeTicksLabel.labelString: Fade Ticks",
257 "*lockLabel.labelString: Lock Timeout",
258 "*passwdLabel.labelString: Password Timeout",
259 "*preferencesForm*XmTextField.columns: 8",
260 "*verboseToggle.labelString: Verbose",
261 "*cmapToggle.labelString: Install Colormap",
262 "*fadeToggle.labelString: Fade Colormap",
263 "*unfadeToggle.labelString: Unfade Colormap",
264 "*lockToggle.labelString: Require Password",
265 "*preferencesDone.labelString: OK",
266 "*preferencesCancel.labelString: Cancel",
267 "XScreenSaver*dragInitiatorProtocolStyle: DRAG_NONE",
268 "XScreenSaver*dragReceiverProtocolStyle: DRAG_NONE",
269 "*demo_dialog.title: XScreenSaver Demo",
270 "*preferences_dialog.title: XScreenSaver Preferences",
271 "*warning_dialog.title: XScreenSaver Warning",
272 "*demo_dialog.geometry: =640x400",
273 "*demo_dialog*font: *-helvetica-bold-r-*-*-*-120-*-*-*-iso8859-1",
274 "*preferences_dialog*font: *-helvetica-bold-r-*-*-*-120-*-*-*-iso8859-1",
275 "*demo_dialog*label1.font: *-helvetica-bold-r-*-*-*-140-*-*-*-iso8859-1",
276 "*preferences_dialog*label1.font:*-helvetica-bold-r-*-*-*-140-*-*-*-iso8859-1",
277 "XScreenSaver*warning_dialog*label0.font: \
278 *-helvetica-bold-r-*-*-*-140-*-*-*-iso8859-1",
279 "XScreenSaver*warning_dialog*Label.font: \
280 *-helvetica-bold-r-*-*-*-120-*-*-*-iso8859-1",
281 "XScreenSaver*warning_dialog*Command.font: \
282 *-helvetica-bold-r-*-*-*-140-*-*-*-iso8859-1",
283 "XScreenSaver.demo_dialog*List.font: \
284 *-courier-medium-r-*-*-*-120-*-*-*-iso8859-1",
285 "XScreenSaver.demo_dialog*Text*font: \
286 *-courier-medium-r-*-*-*-120-*-*-*-iso8859-1",
287 "XScreenSaver.demo_dialog*foreground: #000000",
288 "XScreenSaver.demo_dialog*background: #E5E5E5",
289 "XScreenSaver.demo_dialog*List.background: #FFFFFF",
290 "XScreenSaver.demo_dialog*Scrollbar.background: #D9D9D9",
291 "XScreenSaver.demo_dialog*Command.background: #D9D9D9",
292 "XScreenSaver.demo_dialog*Text*background: #FFFFFF",
293 "XScreenSaver.preferences_dialog*foreground: #000000",
294 "XScreenSaver.preferences_dialog*background: #E5E5E5",
295 "XScreenSaver.preferences_dialog*Command.background: #D9D9D9",
296 "XScreenSaver.preferences_dialog*Toggle.background: #D9D9D9",
297 "XScreenSaver.preferences_dialog*Text*background: #FFFFFF",
298 "XScreenSaver.warning_dialog*foreground: #000000",
299 "XScreenSaver.warning_dialog*background: #E5E5E5",
300 "XScreenSaver.warning_dialog*Command.background: #D9D9D9",
301 "*preferences_dialog*Dialog.value.translations: #override\\n\
302 <Key>Return: beginning-of-line()\\n",
303 "*demo_dialog*viewport.height: 200",
304 "*Form.borderWidth: 0",
305 "*Box.borderWidth: 0",
306 "*Label.borderWidth: 0",
307 "*preferences_dialog*Dialog.borderWidth: 0",
308 "*demo_dialog*run.label: Run",
309 "*demo_dialog*next.label: Run Next",
310 "*demo_dialog*prev.label: Run Previous",
311 "*demo_dialog*edit.label: Preferences",
312 "*demo_dialog*restart.label: Reinitialize",
313 "*demo_dialog*done.label: Quit",
314 "XScreenSaver.demo_dialog*Command.internalWidth: 10",
315 "XScreenSaver.demo_dialog*Command.internalHeight: 4",
316 "*preferences_dialog*timeout.label: Saver Timeout:",
317 "*preferences_dialog*cycle.label: Cycle Timeout:",
318 "*preferences_dialog*fade.label: Fade Duration:",
319 "*preferences_dialog*ticks.label: Fade Ticks:",
320 "*preferences_dialog*lockTime.label: Lock Timeout:",
321 "*preferences_dialog*passwdTime.label: Password Timeout:",
322 "XScreenSaver.preferences_dialog*Command.internalWidth: 10",
323 "XScreenSaver.preferences_dialog*Command.internalHeight: 4",
324 "*preferences_dialog*label1.label: XScreenSaver Parameters",
325 "*preferences_dialog*buttonbox.verbose.label: Verbose",
326 "*preferences_dialog*buttonbox.cmap.label: Install Colormap",
327 "*preferences_dialog*buttonbox.fade.label: Fade Colormap",
328 "*preferences_dialog*buttonbox.unfade.label: Unfade Colormap",
329 "*preferences_dialog*buttonbox.lock.label: Require Password",
330 "*preferences_dialog*done.label: Ok",
331 "*preferences_dialog*cancel.label: Cancel",
332 "*warning_dialog*ok.label: Ok",
333 "*warning_dialog*horizDistance: 30",
334 "*warning_dialog*vertDistance: 0",
335 "*warning_dialog*Label.internalWidth: 1",
336 "*warning_dialog*Label.internalHeight: 0",
337 "*warning_dialog*label0.horizDistance: 80",
338 "*warning_dialog*label0.vertDistance: 20",
339 "*warning_dialog*Command.horizDistance: 160",
340 "*warning_dialog*Command.vertDistance: 20",
341 "*warning_dialog*Command.internalWidth: 20",
342 "*warning_dialog*Command.internalHeight: 5",
343 "*hacks.documentation.isInstalled: True",
344 "*hacks.grav.documentation: \
345 This program draws a simple orbital simulation. If you turn on \
346 trails, it looks kind of like a cloud-chamber photograph. Written by \
348 "*hacks.qix.documentation: \
349 This is the swiss army chainsaw of qix programs. It bounces a series \
350 of line segments around the screen, and uses variations on this basic \
351 motion pattern to produce all sorts of different presentations: line \
352 segments, filled polygons, overlapping translucent areas... Written \
354 "*hacks.attraction.documentation: \
355 Like qix, this uses a simple simple motion model to generate many \
356 different display modes. The control points attract each other up to \
357 a certain distance, and then begin to repel each other. The \
358 attraction/repulsion is proportional to the distance between any two \
359 particles, similar to the strong and weak nuclear forces. \
361 One of the most interesting ways to watch this hack is simply as \
362 bouncing balls, because their motions and interactions with each \
363 other are so odd. Sometimes two balls will get into a tight orbit \
364 around each other, to be interrupted later by a third, or by the edge \
365 of the screen. It looks quite chaotic. \
367 Written by Jamie Zawinski, based on Lisp code by John Pezaris.",
368 "*hacks.pyro.documentation: \
369 Pyro draws exploding fireworks. Blah blah blah. Written by Jamie \
371 "*hacks.helix.documentation: \
372 This repeatedly generates spirally string-art-ish patterns. Written \
374 "*hacks.pedal.documentation: \
375 This is sort of a combination spirograph/string-art. It generates a \
376 large, complex polygon, and lets the X server do the bulk of the work \
377 by giving it an even/odd winding rule. Written by Dale Moore, based \
378 on some ancient PDP-11 code.",
379 "*hacks.rorschach.documentation: \
380 This generates random inkblot patterns. The algorithm is deceptively \
381 simple for how well it works; it merely walks a dot around the screen \
382 randomly, and then reflects the image horizontally, vertically, or \
383 both. Any deep-seated neurotic tendencies which this program reveals \
384 are your own problem. Written by Jamie Zawinski.",
385 "*hacks.hopalong.documentation: \
386 This draws lacy fractal patterns, based on iteration in the imaginary \
387 plane, from a 1986 Scientific American article. Mostly written by \
389 "*hacks.greynetic.documentation: \
390 This draws random colored and stippled rectangles. Written by Jamie \
392 "*hacks.xroger.documentation: \
393 The XScreenSaver logo. Don't you hate it? So do I. Would you like \
394 to design a new logo for XScreenSaver? If so, send jwz your \
396 "*hacks.imsmap.name: IMSmap",
397 "*hacks.imsmap.documentation: \
398 This generates random cloud-like patterns. It looks quite different \
399 in monochrome and color. The basic idea is to take four points on \
400 the edge of the image, and assign each a random ``elevation''. Then \
401 find the point between them, and give it a value which is the average \
402 of the other four, plus some small random offset. Then coloration is \
403 done based on elevation. \
405 The color selection is done by binding the elevation to either hue, \
406 saturation, or brightness, and assigning random values to the others. \
407 The ``brightness'' mode tends to yield cloudlike patterns, and the \
408 others tend to generate images that look like heat-maps or CAT-scans. \
409 Written by Juergen Nickelsen and Jamie Zawinski.",
410 "*hacks.slidescreen.name: SlideScreen",
411 "*hacks.slidescreen.documentation: \
412 This grabs an image of whatever is on your screen, divides it into a \
413 grid, and then randomly shuffles the squares around as if it was one \
414 of those annoying ``16-puzzle'' games, where there is a grid of \
415 squares, one of which is missing. I hate trying to solve those \
416 puzzles, but watching one permute itself is more amusing. Written by \
418 "*hacks.decayscreen.name: DecayScreen",
419 "*hacks.decayscreen.documentation: \
420 This grabs an image of whatever is on your screen, and makes it melt. \
421 You've no doubt seen this effect before, but no screensaver would \
422 really be complete without it. It works best if there's something \
423 colorful visible. Warning, if the effect continues after the screen \
424 saver is off, seek medical attention. Written by David Wald and \
427 A number of these screenhacks have the ability to take an image of \
428 your desktop and manipulate it in some way. On SGI systems, these \
429 programs are able to (at random) pull their source image from the \
430 system's video input instead! This works nicely if you leave some \
431 some random television station plugged in.",
432 "*hacks.jigsaw.documentation: \
433 This grabs a screen image, carves it up into a jigsaw puzzle, \
434 shuffles it, and then solves the puzzle. This works especially well \
435 when you feed it an external video signal instead of letting it grab \
436 the screen image (actually, I guess this is generally true...) When \
437 it is grabbing a video image, it is sometimes pretty hard to guess \
438 what the image is going to look like once the puzzle is solved. \
439 Written by Jamie Zawinski.",
440 "*hacks.blitspin.name: BlitSpin",
441 "*hacks.blitspin.documentation: \
442 The ``blitspin'' hack repeatedly rotates a bitmap by 90 degrees by \
443 using logical operations: the bitmap is divided into quadrants, and \
444 the quadrants are shifted clockwise. Then the same thing is done \
445 again with progressively smaller quadrants, except that all \
446 sub-quadrants of a given size are rotated in parallel. Written by \
447 Jamie Zawinski based on some cool SmallTalk code seen in in Byte \
450 As you watch it, the image appears to dissolve into static and then \
451 reconstitute itself, but rotated. You can provide the image to use, \
452 as an XBM or XPM file, or tell it to grab a screen image and rotate \
454 "*hacks.slip.documentation: \
455 This program throws some random bits on the screen, then sucks them \
456 through a jet engine and spews them out the other side. To avoid \
457 turning the image completely to mush, every now and then it will and \
458 then it interjects some splashes of color into the scene, or go into \
459 a spin cycle, or stretch the image like taffy, or (this is my \
460 addition) grab an image of your current desktop to chew on. \
461 Originally written by Scott Draves; whacked on by Jamie Zawinski.",
462 "*hacks.distort.documentation: \
463 This hack grabs an image of the screen, and then lets a transparent \
464 lens wander around the screen, magnifying whatever is underneath. \
465 Written by Jonas Munsin.",
466 "*hacks.spotlight.documentation: \
467 Draws a spotlight scanning across a black screen, illumnating the \
468 underlying desktop when it passes. Written by Rick Schultz.",
469 "*hacks.hypercube.documentation: \
470 This displays 2D projections of the sequence of 3D objects which are \
471 the projections of the 4D analog to the cube: as a square is composed \
472 of four lines, each touching two others; and a cube is composed of \
473 six squares, each touching four others; a hypercube is composed of \
474 eight cubes, each touching six others. To make it easier to \
475 visualize the rotation, it uses a different color for the edges of \
476 each face. Don't think about it too long, or your brain will melt. \
477 Written by Joe Keane, Fritz Mueller, and Jamie Zawinski.",
478 "*hacks.halo.documentation: \
479 This draws trippy psychedelic circular patterns that hurt to look at. \
480 It can also animate the control-points, but that takes a lot of CPU \
481 and bandwidth. Written by Jamie Zawinski.",
482 "*hacks.maze.documentation: \
483 This is the ancient X maze demo, modified to work with xscreensaver. \
484 It generates a random maze, then solves it with visual feedback. \
485 Originally by Jim Randell; modified by a cast of thousands.",
486 "*hacks.noseguy.documentation: \
487 A little man with a big nose wanders around your screen saying \
488 things. The things which he says can come from a file, or from an \
489 external program like `zippy' or `fortune'. This was extracted from \
490 `xnlock' by Dan Heller. Colorized by Jamie Zawinski.",
491 "*hacks.flame.documentation: \
492 Another iterative fractal generator. Written by Scott Draves.",
493 "*hacks.lmorph.name: LMorph",
494 "*hacks.lmorph.documentation: \
495 This generates random spline-ish line drawings and morphs between \
496 them. Written by Sverre H. Huseby and Glenn T. Lines.",
497 "*hacks.deco.documentation: \
498 This one subdivides and colors rectangles randomly. It looks kind of \
499 like Brady-Bunch-era rec-room wall paneling. (Raven says: ``this \
500 screensaver is ugly enough to peel paint.'') Written by Jamie \
501 Zawinski, inspired by Java code by Michael Bayne.",
502 "*hacks.moire.documentation: \
503 This one draws cool circular interference patterns. Most of the \
504 circles you see aren't explicitly rendered, but show up as a result \
505 of interactions between the other pixels that were drawn. Written by \
506 Jamie Zawinski, inspired by Java code by Michael Bayne. As he \
507 pointed out, the beauty of this one is that the heart of the display \
508 algorithm can be expressed with just a pair of loops and a handful of \
509 arithmetic, giving it a high ``display hack metric''.",
510 "*hacks.moire2.documentation: \
511 Another example of the fun you can have with moire \
512 interference patterns; this hack generates fields of concentric \
513 circles or ovals, and combines the planes with various operations. \
514 The planes are moving independently of one another, causing the \
515 interference lines to ``spray.'' Written by Jamie Zawinski.",
516 "*hacks.lightning.documentation: \
517 This one draws crackling fractal lightning bolts. It's simple, \
518 direct, and to the point. If only it had sound... Written by Keith \
520 "*hacks.strange.documentation: \
521 This draws strange attractors: it's a colorful, \
522 unpredictably-animating field of dots that swoops and twists around. \
523 The motion is very nice. Written by Massimino Pascal.",
524 "*hacks.spiral.documentation: \
525 Moving circular patterns, by Peter Schmitzberger. Moving circular \
526 patterns means moire; interference patterns, of course.",
527 "*hacks.laser.documentation: \
528 Moving radiating lines, that look vaguely like scanning laser beams. \
529 Written by Pascal Pensa. (Frankie say: relax.)",
530 "*hacks.grav.documentation: \
531 This program draws a simple orbital simulation. If you turn on \
532 trails, it looks kind of like a cloud-chamber photograph. Written \
534 "*hacks.drift.documentation: \
535 How could one possibly describe this except as ``drifting recursive \
536 fractal cosmic flames?'' Another fine hack from the Scott Draves \
537 collection of fine hacks.",
538 "*hacks.ifs.name: IFS",
539 "*hacks.ifs.documentation: \
540 This one draws spinning, colliding iterated-function-system images. \
541 Written by Massimino Pascal.",
542 "*hacks.julia.documentation: \
543 This one draws spinning, animating (are you detecting a pattern here \
544 yet?) explorations of the Julia set. You've probably seen static \
545 images of this fractal form before, but it's a lot of fun to watch in \
546 motion as well. One interesting thing is that there is a small \
547 swinging dot passing in front of the image, which indicates the \
548 control point from which the rest of the image was generated. \
549 Written by Sean McCullough.",
550 "*hacks.penrose.documentation: \
551 Draws quasiperiodic tilings; think of the implications on modern \
552 formica technology. Written by Timo Korvola. \
554 In April 1997, Sir Roger Penrose, a British math professor who has \
555 worked with Stephen Hawking on such topics as relativity, black \
556 holes, and whether time has a beginning, filed a \
557 copyright-infringement lawsuit against the Kimberly-Clark \
558 Corporation, which Penrose said copied a pattern he created (a \
559 pattern demonstrating that ``a nonrepeating pattern could exist in \
560 nature'') for its Kleenex quilted toilet paper. Penrose said he \
561 doesn't like litigation but, ``When it comes to the population of \
562 Great Britain being invited by a multinational to wipe their bottoms \
563 on what appears to be the work of a Knight of the Realm, then a last \
564 stand must be taken.'' \
566 As reported by News of the Weird #491, 4-jul-1997.",
567 "*hacks.sierpinski.documentation: \
568 This draws the two-dimensional variant of the recursive Sierpinski \
569 triangle fractal. Written by Desmond Daignault.",
570 "*hacks.braid.documentation: \
571 Draws random color-cycling inter-braided concentric circles. Written \
573 "*hacks.galaxy.documentation: \
574 This draws spinning galaxies, which then collide and scatter their \
575 stars to the, uh, four winds or something. Originally an Amiga \
576 program by Uli Siegmund.",
577 "*hacks.bouboule.documentation: \
578 This draws what looks like a spinning, deforming baloon with \
579 varying-sized spots painted on its invisible surface. Written by \
581 "*hacks.swirl.documentation: \
582 More flowing, swirly patterns. This version is by M. Dobie and R. \
583 Taylor, but you might have seen a Mac program similar to this called \
584 FlowFazer. There is also a cool Java applet of a similar concept",
585 "*hacks.flag.documentation: \
586 This draws a waving colored flag, that undulates its way around the \
587 screen. The trick is the flag can contain arbitrary text and images. \
588 By default, it displays either the current system name and OS \
589 type, or a picture of ``Bob,'' but you can replace the text or the \
590 image with a command-line option. Written by Charles Vidal and Jamie \
592 "*hacks.sphere.documentation: \
593 Another of the classic screenhacks of the distant past, this one \
594 draws shaded spheres in multiple colors. This hack traces its \
595 lineage back to Tom Duff in 1982.",
596 "*hacks.forest.documentation: \
597 This draws fractal trees. Written by Peter Baumung. Everybody loves \
599 "*hacks.lisa.documentation: \
600 This draws Lisajous loops, by Caleb Cullen. Remember that device \
601 they had the Phantom Zone prisoners in during their trial in \
602 Superman? I think that was one of these.",
603 "*hacks.lissie.documentation: \
604 Another Lissajous figure. This one draws the progress of circular \
605 shapes along a path. Written by Alexander Jolk.",
606 "*hacks.goop.documentation: \
607 This draws set of animating, transparent, amoeba-like blobs. The \
608 blobs change shape as they wander around the screen, and they are \
609 translucent, so you can see the lower blobs through the higher ones, \
610 and when one passes over another, their colors merge. Written by \
611 Jamie Zawinski. I got the idea for this from a cool mouse pad I \
612 have, which achieves the same kind of effect in real life by having \
613 several layers plastic with colored oil between them. Written by \
615 "*hacks.starfish.documentation: \
616 This generates a sequence of undulating, throbbing, star-like \
617 patterns which pulsate, rotate, and turn inside out. Another display \
618 mode uses these shapes to lay down a field of colors, which are then \
619 cycled. The motion is very organic. Written by Jamie Zawinski.",
620 "*hacks.munch.documentation: \\n\
627 As reported by HAKMEM, in 1962, Jackson Wright wrote the above PDP-1 \
628 code. That code still lives on in this screenhack, some 35 years \
629 later. The number of lines of enclosing code has increased \
630 substantially, however. This version is by Tim Showalter.",
631 "*hacks.fadeplot.name: FadePlot",
632 "*hacks.fadeplot.documentation: \
633 Draws what looks like a waving ribbon following a sinusoidal path. \
634 Written by Bas van Gaalen and Charles Vidal.",
635 "*hacks.coral.documentation: \
636 Simulates coral growth, albeit somewhat slowly. This image doesn't \
637 really do it justice. Written by Frederick Roeber.",
638 "*hacks.mountain.documentation: \
639 Generates random 3d plots that look vaguely mountainous. Written by \
641 "*hacks.triangle.documentation: \
642 Generates random mountain ranges using iterative subdivision of \
643 triangles. Written by Tobias Gloth.",
644 "*hacks.worm.documentation: \
645 An ancient xlock hack that draws multicolored worms that crawl around \
646 the screen. Written by Brad Taylor, Dave Lemke, Boris Putanec, and \
648 "*hacks.rotor.documentation: \
649 Another ancient xlock demo, this one by Tom Lawrence. It draws a \
650 line segment moving along a complex spiraling curve. I tweaked this \
651 to generate curvier lines, but still frames of it don't look like \
653 "*hacks.ant.documentation: \
654 A cellular automaton that is really a two-dimensional Turing machine: \
655 as the heads (``ants'') walk along the screen, they change pixel \
656 values in their path. Then, as they pass over changed pixels, their \
657 behavior is influenced. Written by David Bagley.",
658 "*hacks.demon.documentation: \
659 A cellular automaton that starts with a random field, and organizes \
660 it into stripes and spirals. Written by David Bagley.",
661 "*hacks.loop.documentation: \
662 This one produces loop-shaped colonies that spawn, age, and \
663 eventually die. Written by David Bagley.",
664 "*hacks.vines.documentation: \
665 This one generates a continuous sequence of small, curvy geometric \
666 patterns. It scatters them around your screen until it fills up, \
667 then it clears the screen and starts over. Written by Tracy Camp and \
669 "*hacks.kaleidescope.documentation: \
670 Another clone of an ancient meme, consisting largely of frenetic \
671 rotational motion of colored lines. This one is by Ron Tapia. The \
672 motion is nice, but I think it needs more solids, or perhaps just \
673 brighter colors. More variations in the rotational speed might help, \
675 "*hacks.xjack.documentation: \
676 This program behaves schizophrenically and makes a lot of typos. \
677 Written by Jamie Zawinski. If you haven't seen Stanley Kubrick's \
678 masterpiece, ``The Shining,'' you won't get it. Those who have \
679 describe this hack as ``inspired.''",
680 "*hacks.xlyap.documentation: \
681 This generates pretty fractal pictures by doing funky math involving \
682 the ``Lyapunov exponent.'' It has a cool interactive mode, too. \
683 Written by Ron Record.",
684 "*hacks.cynosure.documentation: \
685 A hack similar to `greynetic', but less frenetic. The first \
686 implementation was by Stephen Linhart; then Ozymandias G. Desiderata \
687 wrote a Java applet clone. That clone was discovered by Jamie \
688 Zawinski, and ported to C for inclusion here.",
689 "*hacks.flow.documentation: \
690 Another series of strange attractors: a flowing series of points, \
691 making strange rotational shapes. Written by Jeff Butterworth.",
692 "*hacks.epicycle.documentation: \
693 This program draws the path traced out by a point on the edge of a \
694 circle. That circle rotates around a point on the rim of another \
695 circle, and so on, several times. These were the basis for the \
696 pre-heliocentric model of planetary motion. Written by James \
698 "*hacks.interference.documentation: \
699 Another color-field hack, this one works by computing decaying \
700 sinusoidal waves, and allowing them to interfere with each other as \
701 their origins move. Written by Hannu Mallat.",
702 "*hacks.truchet.documentation: \
703 This draws line- and arc-based Truchet patterns that tile the screen. \
704 Written by Adrian Likins.",
705 "*hacks.bsod.name: BSOD",
706 "*hacks.bsod.documentation: \
707 BSOD stands for ``Blue Screen of Death.'' The finest in personal \
708 computer emulation, this hack simulates popular screen savers from a \
709 number of less robust operating systems. Written by Jamie Zawinski.",
710 "*hacks.crystal.documentation: \
711 Moving polygons, similar to a kaleidescope (more like a kaleidescope \
712 than the hack called `kaleid,' actually.) This one by Jouk Jansen.",
713 "*hacks.discrete.documentation: \
714 More ``discrete map'' systems, including new variants of Hopalong and \
715 Julia, and a few others. Written by Tim Auckland.",
716 "*hacks.kumppa.documentation: \
717 Spiraling, spinning, and very, very fast splashes of color rush \
718 toward the screen. Written by Teemu Suutari.",
719 "*hacks.rd-bomb.name: RD-Bomb",
720 "*hacks.rd-bomb.documentation: \
721 Another variation of the `Bomb' program by Scott Draves. This draws \
722 a grid of growing square-like shapes that, once they overtake each \
723 other, react in unpredictable ways. ``RD'' stands for \
724 reaction-diffusion.",
725 "*hacks.sonar.documentation: \
726 This program draws a simulation of a sonar screen. Written by \
727 default, it displays a random assortment of ``bogies'' on the screen, \
728 but if compiled properly, it can ping (pun intended) your local \
729 network, and actually plot the proximity of the other hosts on your \
730 network to you. It would be easy to make it monitor other sources of \
731 data, too. (Processes? Active network connections? CPU usage per \
732 user?) Written by Stephen Martin.",
733 "*hacks.t3d.name: T3D",
734 "*hacks.t3d.documentation: \
735 This draws a working analog clock composed of floating, throbbing \
736 bubbles. Written by Bernd Paysan.",
737 "*hacks.penetrate.documentation: \
738 This hack simulates the classic arcade game Missile Command. Written \
740 "*hacks.deluxe.documentation: \
741 This draws a pulsing sequence of stars, circles, and lines. It would \
742 look better if it was faster, but as far as I can tell, there is no \
743 way to make this be both: fast, and flicker-free. Yet another reason \
744 X sucks. Written by Jamie Zawinski.",
745 "*hacks.compass.documentation: \
746 This draws a compass, with all elements spinning about randomly, for \
747 that ``lost and nauseous'' feeling. Written by Jamie Zawinski.",
748 "*hacks.squiral.documentation: \
749 Draws a set of interacting, square-spiral-producing automata. The \
750 spirals grow outward until they hit something, then they go around \
751 it. Written by Jeff Epler.",
752 "*hacks.xflame.documentation: \
753 Draws a simulation of pulsing fire. It can also take an arbitrary \
754 image and set it on fire too. Written by Carsten Haitzler, hacked on \
756 "*hacks.wander.documentation: \
757 Draws a colorful random-walk, in various forms. Written by Rick \
759 "*hacks.critical.documentation: \
760 Draws a system of self-organizing lines. It starts out as random \
761 squiggles, but after a few iterations, order begins to appear. \
762 Written by Martin Pool.",
763 "*hacks.phosphor.documentation: \
764 Draws a simulation of an old terminal, with large pixels and \
765 long-sustain phosphor. It can run any program as a source of the text \
766 it displays. Written by Jamie Zawinski.",
767 "*hacks.xmatrix.documentation: \
768 A rendition of the text scrolls seen in the movie ``The Matrix.'' \
769 Written by Jamie Zawinski.",
770 "*hacks.petri.documentation: \
771 This simulates colonies of mold growing in a petri dish. Growing \
772 colored circles overlap and leave spiral interference in their wake. \
773 Written by Dan Bornstein.",
774 "*hacks.shadebobs.name: ShadeBobs",
775 "*hacks.shadebobs.documentation: \
776 This draws smoothly-shaded oscilating oval patterns, that look \
777 something like vapor trails or neon tubes. Written by Shane Smit.",
778 "*hacks.ccurve.name: C Curve",
779 "*hacks.ccurve.documentation: \
780 Generates self-similar linear fractals, including the classic ``C \
781 Curve.'' Written by Rick Campbell.",
782 "*hacks.blaster.documentation: \
783 Draws a simulation of flying space-combat robots (cleverly disguised \
784 as colored circles) doing battle in front of a moving star field. \
785 Written by Jonathan Lin.",
786 "*hacks.bumps.documentation: \
787 A bit like `Spotlight', except that instead of merely exposing part \
788 of your desktop, it creates a bump map from it. Basically, it \
789 3D-izes a roaming section of your desktop, based on color intensity. \
790 Written by Shane Smit.",
791 "*hacks.webcollage.name: WebCollage",
792 "*hacks.webcollage.documentation: \
793 This program makes collages out of random images pulled off of the \
794 World Wide Web. It finds these images by doing random web searches, \
795 and then extracting images from the returned pages. It can also be \
796 set up to filter the images through the `VidWhacker' program, above, \
797 which looks really great. \
799 (Note that most of the images it finds are text, and not pictures. \
800 This is because most of the web is pictures of text. Which is pretty \
801 sad.) Written by Jamie Zawinski.",
802 "*hacks.vidwhacker.name: VidWhacker",
803 "*hacks.vidwhacker.documentation: \
804 This is actually just a shell script that grabs a frame of video from \
805 the system's video input, and then uses some PBM filters (chosen at \
806 random) to manipulate and recombine the video frame in various ways \
807 (edge detection, subtracting the image from a rotated version of \
808 itself, etc.) Then it displays that image for a few seconds, and \
809 does it again. This works really well if you just feed broadcast \
810 television into it. \
812 Currently, the three lines of the script that actually grab the \
813 source picture are SGI specific, but it should be trivial to adapt it \
814 to work on other systems that can grab video (please send me the \
815 changes if you do this...)",
816 "*hacks.rocks.documentation: \
817 This draws an animation of flight through an asteroid field, with \
818 changes in rotation and direction. It can also display 3D \
819 separations for red/blue glasses! Mostly written by Jamie Zawinski.",
820 "*hacks.bubbles.documentation: \
821 This simulates the kind of bubble formation that happens when water \
822 boils:small bubbles appear, and as they get closer to each other, \
823 they combine to form larger bubbles, which eventually pop. Written \
825 "*hacks.gears.documentation: \
826 This draws a set of turning, interlocking gears, rotating in three \
827 dimensions. Another GL hack, by Danny Sung, Brian Paul, and Ed \
829 "*hacks.superquadrics.documentation: \
830 Ed Mackey reports that he wrote the first version of this program in \
831 BASIC on a Commodore 64 in 1987, as a 320x200 black and white \
832 wireframe. Now it is GL and has specular reflections.",
833 "*hacks.morph3d.name: Morph3D",
834 "*hacks.morph3d.documentation: \
835 Another 3d shape-changing GL hack, by Marcelo Vianna. It has the \
836 same shiny-plastic feel as Superquadrics, as many computer-generated \
838 "*hacks.cage.documentation: \
839 This draws Escher's ``Impossible Cage,'' a 3d analog of a moebius \
840 strip, and rotates it in three dimensions. Written by Marcelo \
842 "*hacks.moebius.documentation: \
843 Another M. C. Escher hack by Marcelo Vianna, this one draws \
844 ``Moebius Strip II,'' a GL image of ants walking along the surface of \
846 "*hacks.stairs.documentation: \
847 by Marcelo Vianna's third Escher GL hack, this one draws an \
848 ``infinite'' staircase.",
849 "*hacks.pipes.documentation: \
850 If you've ever been in the same room with a Windows NT machine, \
851 you've probably seen this GL hack. This version is by Marcelo \
853 "*hacks.sproingies.documentation: \
854 Q-Bert meets Marble Madness! Written by Ed Mackey.",
855 "*hacks.rubik.documentation: \
856 Draws a Rubik's Cube that rotates in three dimensions and repeatedly \
857 shuffles and solves itself. Another fine GL hack by Marcelo Vianna.",
858 "*hacks.atlantis.documentation: \
859 This is xfishtank writ large: a GL animation of a number of sharks, \
860 dolphins, and whales. The swimming motions are great. Originally \
861 written by Mark Kilgard.",
862 "*hacks.lament.documentation: \
863 Animates a simulation of Lemarchand's Box, repeatedly solving itself. \
864 Requires OpenGL, and a machine with fast hardware support for texture \
865 maps. Warning: occasionally opens doors. Written by Jamie Zawinski.",
866 "*hacks.bubble3d.name: Bubble3D",
867 "*hacks.bubble3d.documentation: \
868 Draws a stream of rising, undulating 3D bubbles, rising toward the \
869 top of the screen, with nice specular reflections. Written by Richard \
871 "*hacks.glplanet.name: GLPlanet",
872 "*hacks.glplanet.documentation: \
873 Draws a planet bouncing around in space. Written by David Konerding. \
874 The built-in image is a map of the earth (extracted from `xearth'), \
875 but you can wrap any texture around the sphere, e.g., the planetary \
876 textures that come with `ssystem'.",
877 "*hacks.pulsar.documentation: \
878 Draws some intersecting planes, making use of alpha blending, fog, \
879 textures, and mipmaps, plus a ``frames per second'' meter so that you \
880 can tell how fast your graphics card is... Requires OpenGL. Written \
881 by David Konerding.",
882 "*hacks.extrusion.documentation: \
883 Draws various rotating extruded shapes that twist around, lengthen, \
884 and turn inside out. Created by David Konerding from the samples \
885 that come with the GL Extrusion library by Linas Vepstas.",
886 "*hacks.sierpinski3d.name: Sierpinski3D",
887 "*hacks.sierpinski3d.documentation: \
888 This draws the three-dimensional variant of the recursive Sierpinski \
889 triangle fractal, using GL. Written by Tim Robinson.",
890 "*hacks.ripples.documentation: \
891 This draws rippling interference patterns like splashing water. \
892 With the -water option, it manipulates your desktop image to look \
893 like something is dripping into it. Written by Tom Hammersley.",
894 "*hacks.xdaliclock.name: XDaliClock",
895 "*hacks.xdaliclock.documentation: \
896 XDaliClock draws a large digital clock, the numbers of which change by \
897 ``melting'' into their new shapes. Written by Jamie Zawinski. This \
898 is not included with the XScreenSaver package, but if you don't have \
899 it already, you can find it at <http://www.jwz.org/xdaliclock/>.",
900 "*hacks.xearth.documentation: \
901 XEarth draws an image of the Earth, as seen from your favorite vantage \
902 point in space, correctly shaded for the current position of the Sun. \
903 Written by Kirk Johnson. This is not included with the XScreenSaver \
904 package, but if you don't have it already, you can find it at \
905 <http://www.cs.colorado.edu/~tuna/xearth/>.",
906 "*hacks.ssystem.name: SSystem",
907 "*hacks.ssystem.documentation: \
908 SSystem is a GL Solar System simulator. It simulates flybys of Sun, \
909 the nine planets and a few major satellites, with four camera modes. \
910 Written by Raul Alonso. This is not included with the XScreenSaver \
911 package, but if you don't have it already, you can find it at \
912 <http://www1.las.es/~amil/ssystem/>.",
913 "*hacks.xmountains.documentation: \
914 XMountains generates realistic-looking fractal terrains of snow-capped \
915 mountains near water, with either a top view or a side view. \
916 Written by Stephen Booth. This is not included with the XScreenSaver \
917 package, but if you don't have it already, you can find it at \
918 <http://www.epcc.ed.ac.uk/~spb/xmountains/>.",
919 "*hacks.xaos.name: XaoS",
920 "*hacks.xaos.documentation: \
921 XaoS generates fast fly-through animations of the Mandelbrot and other \
922 fractal sets. Written by Thomas Marsh and Jan Hubicka. This is not \
923 included with the XScreenSaver package, but if you don't have it \
924 already, you can find it at <http://limax.paru.cas.cz/~hubicka/XaoS/>.",
925 "*hacks.xfishtank.name: XFishTank",
926 "*hacks.xfishtank.documentation: \
927 Fish! This is not included with the XScreenSaver package, but if you \
928 don't have it already, you can find it at \
929 <http://metalab.unc.edu/pub/Linux/X11/demos/>.",
projects / xscreensaver / blob