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.TH XScreenSaver 1 "14-Dec-95" "X Version 11"
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bubbles - frying pan / soft drink simulation
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[\-display \fIhost:display.screen\fP] [\-foreground \fIcolor\fP] [\-background \fIcolor\fP] [\-window] [\-root] [\-mono] [\-install] [\-visual \fIvisual\fP] [\-simple] [\-broken] [\-3D] [\-rise|\-drop] [-trails]
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\fIBubbles\fP sprays lots of little random bubbles all over the window which
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then grow until they reach their maximum size and go pop. The inspiration
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for this was watching little globules of oil on the bottom of a frying pan
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and it also looks a little like bubbles in fizzy soft drink. The default
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mode uses fancy ray-traced bubbles but there is also a mode which just draws
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circles in case the default mode is too taxing on your hardware.
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was compiled, it accepts the following options:
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Colour of circles if \fI\-simple\fP mode is selected.
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Colour of window background.
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Draw on a newly-created window. This is the default.
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Draw on the root window.
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If on a color display, pretend we're on a monochrome display.
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Install a private colormap for the window.
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.B \-visual \fIvisual\fP
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Specify which visual to use. Legal values are the name of a visual class,
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or the id number (decimal or hex) of a specific visual.
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.B \-delay microseconds
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How much of a delay should be introduced between steps of the animation.
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Default 800, or about 800 microsecond. Actually, this is the delay between each
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group of 15 new bubbles since such a delay between each step results in a
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very slow animation rate.
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Same as \fI\-delay 0\fP.
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Don't use the default fancy pixmap bubbles. Just draw circles instead.
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This may give more bearable performance if your hardware wasn't made for
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Don't hide bubbles when they pop. This was a bug during development
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but the results were actually quite attractive.
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Normally, the simulation is done completely in two dimensions. When a
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bubble swallows up another bubble, the areas of each are added to get
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the area of the resulting bubble. This option changes the algorithm
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to instead add volume (imagining each to be a sphere in 3D space). The
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whole thing looks more realistic but I find it attracts attention to
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the flickering of each bubble as they are move and are redrawn. Your
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Don't print messages explaining why one or several command line options
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were ignored. This is disabled by default.
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Display the current frame rate and CPU load.
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If you find the pace of things too slow, remember that there is a delay
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even though you specify no \fI\-delay\fP option. Try using \fI\-nodelay\fP
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although beware of the effects of irritation of other users if you're on a
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shared system as you bleed their CPU time away.
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Some tools to assist in creation of new bubbles are included in the source
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distribution. These can either be loaded with the \fI\-file\fP or
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\fI\-directory\fP options (if available) or they can be used in place
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of the distributed default bubble (bubble_default.c).
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You might like to copy these scripts to a permanent location and
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use them. Read bubbles.README.
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Rendered bubbles are not supported on monochrome displays. I'm not
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convinced that small bubbles, even dithered properly are going to look
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like anything more than a jumble of random dots.
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There is a delay before something appears on the screen when using
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rendered bubbles. The XPM library seems to take a \fBlong\fP time to make
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pixmaps out of raw data. This can be irritating on slower systems.
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The movement of the bubbles looks jerky if an incomplete set of bubbles
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The hide/display algorithm could do with some work to avoid flickering
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when \fI\-nodelay\fP is set.
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to get the default host and display number.
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to get the name of a resource file that overrides the global resources
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stored in the RESOURCE_MANAGER property.
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.SH DISTRIBUTION POLICY
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This work is Copyright \(co 1995, 1996 by James Macnicol. Permission
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to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided
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that the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation. No representations are made about the suitability of
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this software for any purpose. It is provided "as is" without express
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James Macnicol <james.macnicol@mailexcite.com>
added
removed
hacks/bubbles.man
