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NAME
     bubbles - frying pan / soft drink simulation

SYNOPSIS
     bubbles [-display host:display.screen]  [-foreground  color]
     [-background  color]  [-window]  [-root]  [-mono] [-install]
     [-visual visual] [-simple] [-broken] [-3D] [-file  filename]
     [-directory directoryname]

DESCRIPTION
     Bubbles sprays lots of little random bubbles  all  over  the
     window  which  then grow until they reach their maximum size
     and go pop.  The inspiration for this  was  watching  little
     globules  of  oil  on the bottom of a frying pan and it also
     looks a little  like  bubbles  in  fizzy  soft  drink.   The
     default mode uses fancy ray-traced bubbles but there is also
     a mode which just draws circles in case the default mode  is
     too taxing on your hardware.

OPTIONS
     Depending on how your bubbles was compiled, it  accepts  the
     following options:

     -foreground
             Colour of circles if -simple mode is selected.

     -background
             Colour of window background.

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

     -root   Draw on the root window.

     -mono   If on a color display, pretend we're on a monochrome
             display.

     -install
             Install a private colormap for the window.

     -visual visual
             Specify which visual to use.  Legal values  are  the
             name of a visual class, or the id number (decimal or
             hex) of a specific visual.

     -delay microseconds
             How much of a delay  should  be  introduced  between
             steps  of  the  animation.   Default  1,  or about 1
             microsecond.  Actually, this is  the  delay  between
             each  group  of  15  new  bubbles since such a delay
             between each step results in a very  slow  animation
             rate.

     -nodelay
             Same as -delay 0.

     -simple Don't use the default fancy  pixmap  bubbles.   Just
             draw  circles  instead.  This may give more bearable
             performance if your hardware wasn't  made  for  this
             sort of thing.

     -broken Don't hide bubbles when they pop.  This  was  a  bug
             during  development  but  the  results were actually
             quite attractive.  (This option is only available if
             you  have  the  XPM  library available and the imake
             generated Makefile has defined HAVE_XPM).

     -3D     Normally, the simulation is done completely  in  two
             dimensions.   When a bubble swallows up another bub-
             ble, the areas of each are added to get the area  of
             the resulting bubble.  This option changes the algo-
             rithm to instead add volume (imagining each to be  a
             sphere  in  3D  space).   The whole thing looks more
             realistic but I find it attracts  attention  to  the
             flickering  of  each bubble as they are move and are
             redrawn.  Your mileage may vary.

     -file filename
             Use  the  pixmap  definitions  in  the  given  file,
             instead  of  the  default  (if  one is compiled in).
             This is ignored if -simple  is  specified.   If  the
             file  is  compressed (either with compress or gzip),
             it is decompressed before use.   (This  option  only
             works  if you have XPM compiled into your binary and
             you have compiled with BUBBLES_IO set in  bubbles.h.
             This is not the default).

     -directory directoryname
             Similar to -file except the file is  taken  randomly
             from   the  contents  of  the  specified  directory.
             (Again, this option is only available  if  you  have
             XPM  and  BUBBLES_IO  was  set  when compiling.  See
             above).

     -quiet  Don't print messages explaining why one  or  several
             command line options were ignored.  This is disabled
             by default.

NOTES
     If you find the pace of things too slow, remember that there
     is  a  delay  even though you specify no -delay option.  Try
     using -nodelay although beware of the effects of  irritation
     of  other  users  if  you're on a shared system as you bleed
     their CPU time away.

     Some tools to assist in creation of new bubbles are included
     in the source distribution.  These can either be loaded with
     the -file or -directory options (if available) or  they  can
     be   used   in  place  of  the  distributed  default  bubble
     (bubble_default.c).  You might like to copy these scripts to
     a permanent location and use them.  Read bubbles.README.

     Rendered bubbles are not supported on  monochrome  displays.
     I'm not convinced that small bubbles, even dithered properly
     are going to look like anything more than a jumble of random
     dots.

BUGS
     There is a delay before something appears on the screen when
     using  rendered  bubbles.   The  XPM library seems to take a
     long time to make pixmaps out of  raw  data.   This  can  be
     irritating on slower systems.

     The movement of the bubbles looks jerky if an incomplete set
     of bubbles is used.

     The hide/display algorithm could do with some work to  avoid
     flickering when -nodelay is set.

ENVIRONMENT
     DISPLAY to get the default host and display number.

     XENVIRONMENT
             to get the name of a resource  file  that  overrides
             the  global resources stored in the RESOURCE_MANAGER
             property.

SEE ALSO
     X(1), xscreensaver(1)

DISTRIBUTION POLICY
     This work is Copyright O 1995, 1996 by James Macnicol.  Dis-
     tribution is allowed under the terms of the GNU General Pub-
     lic License.  Look at the sources for the legalese.

AUTHOR
     James Macnicol <[email protected]>.

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