bubbles man page on IRIX

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XScreenSaver(1)					  XScreenSaver(1)

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 file
       name] [-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
	       bubble, the areas of each are  added  to	 get  the
	       area of the resulting bubble.  This option changes
	       the algorithm to	 instead  add  volume  (imagining
	       each to be a sphere in 3D space).  The whole thing
	       looks more realistic but I find it attracts atten
	       tion  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  bub
	       bles.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  dis
	       abled 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 irri
       tation 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  bub
       bles.README.

       Rendered bubbles are not supported on monochrome displays.
       I'm not convinced that small bubbles, even dithered  prop
       erly 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_MAN
	       AGER property.

SEE ALSO
       X(1), xscreensaver(1)

DISTRIBUTION POLICY
       This  work  is  Copyright   1995, 1996 by James Macnicol.
       Permission to use, copy, modify, distribute, and sell this
       software	 and  its documentation for any purpose is hereby
       granted without fee, provided  that  the	 above	copyright
       notice  appear  in all copies and that both that copyright
       notice and this permission  notice  appear  in  supporting
       documentation.	No  representations  are  made	about the
       suitability of this software for any purpose.  It is  pro
       vided "as is" without express or implied warranty.

AUTHOR
       James Macnicol <james.macnicol@mailexcite.com>

X Version 11		    14-Dec-95		  XScreenSaver(1)
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