| 1 | .TH XScreenSaver 1 "" "X Version 11" |
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| 2 | .SH NAME |
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| 3 | fluidballs - the physics of bouncing balls. |
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| 4 | .SH SYNOPSIS |
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| 5 | .B fluidballs |
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| 6 | [\-display \fIhost:display.screen\fP] |
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| 7 | [\-visual \fIvisual\fP] |
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| 8 | [\-window] |
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| 9 | [\-root] |
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| 10 | [\-count \fInumber\fP] |
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| 11 | [\-size \fInumber\fP] |
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| 12 | [\-gravity \fInumber\fP] |
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| 13 | [\-wind \fInumber\fP] |
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| 14 | [\-elasticity \fInumber\fP] |
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| 15 | [\-delay \fInumber\fP] |
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| 16 | [\-nonrandom] |
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| 17 | [\-no-shake] |
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| 18 | [\-fps] |
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| 19 | .SH DESCRIPTION |
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| 20 | Models the physics of bouncing balls, or of particles in a gas or fluid, |
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| 21 | depending on the settings. If "Shake Box" is selected, then every now and |
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| 22 | then, the box will be rotated, changing which direction is down (in order |
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| 23 | to keep the settled balls in motion.) |
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| 24 | .SH OPTIONS |
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| 25 | .TP 8 |
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| 26 | .B \-visual \fIvisual\fP |
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| 27 | Specify which visual to use. Legal values are the name of a visual class, |
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| 28 | or the id number (decimal or hex) of a specific visual. |
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| 29 | .TP 8 |
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| 30 | .B \-window |
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| 31 | Draw on a newly-created window. This is the default. |
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| 32 | .TP 8 |
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| 33 | .B \-root |
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| 34 | Draw on the root window. |
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| 35 | .TP 8 |
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| 36 | .B \-count \fInumber\fP |
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| 37 | How many balls to display. Default: 300. |
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| 38 | .TP 8 |
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| 39 | .B \-size \fInumber\fP |
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| 40 | Maximum size of each ball. Default: 25. |
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| 41 | .TP 8 |
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| 42 | .B \-gravity \fInumber\fP |
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| 43 | Coefficient of gravity. Useful values are < 0.1. Default: 0.01. |
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| 44 | .TP 8 |
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| 45 | .B \-wind \fInumber\fP |
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| 46 | Wind. Useful values are < 0.1. Default: 0.00. |
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| 47 | .TP 8 |
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| 48 | .B \-elasticity \fInumber\fP |
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| 49 | Coefficient of elasticity. Useful values are 0.2 to 1.0. Default: 0.97. |
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| 50 | Lower numbers make less bouncy balls. |
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| 51 | .TP 8 |
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| 52 | .B \-delay \fInumber\fP |
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| 53 | Per-frame delay, in microseconds. Default: 10000 (0.01 seconds.). |
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| 54 | .TP 8 |
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| 55 | .B \-nonrandom |
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| 56 | Make all balls be the same size. |
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| 57 | .TP 8 |
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| 58 | .B \-no-nonrandom |
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| 59 | Make the balls be random sizes. Default. |
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| 60 | .TP 8 |
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| 61 | .B \-shake | \-no-shake |
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| 62 | Whether to shake the box if the system seems to have settled down. |
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| 63 | "Shake" means "change the direction of Down." |
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| 64 | .TP 8 |
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| 65 | .B \-fps | \-no-fps |
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| 66 | Whether to show a frames-per-second display at the bottom of the screen. |
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| 67 | .SH ENVIRONMENT |
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| 68 | .PP |
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| 69 | .TP 8 |
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| 70 | .B DISPLAY |
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| 71 | to get the default host and display number. |
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| 72 | .TP 8 |
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| 73 | .B XENVIRONMENT |
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| 74 | to get the name of a resource file that overrides the global resources |
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| 75 | stored in the RESOURCE_MANAGER property. |
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| 76 | .SH SEE ALSO |
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| 77 | .BR X (1), |
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| 78 | .BR xscreensaver (1) |
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| 79 | .SH COPYRIGHT |
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| 80 | Copyright \(co 2002 by Peter Birtles and Jamie Zawinski. Permission to |
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| 81 | use, copy, modify, distribute, and sell this software and its |
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| 82 | documentation for any purpose is hereby granted without fee, provided |
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| 83 | that the above copyright notice appear in all copies and that both that |
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| 84 | copyright notice and this permission notice appear in supporting |
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| 85 | documentation. No representations are made about the suitability of |
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| 86 | this software for any purpose. It is provided "as is" without express |
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| 87 | or implied warranty. |
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| 88 | .SH AUTHOR |
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| 89 | Peter Birtles, Jamie Zawinski, and Steven Barker. |
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| 90 | |
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