| 1 | .TH XScreenSaver 1 "10-May-97" "X Version 11" |
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| 2 | .SH NAME |
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| 3 | grav - draws a simple orbital simulation |
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| 4 | .SH SYNOPSIS |
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| 5 | .B grav |
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| 6 | [\-display \fIhost:display.screen\fP] [\-foreground \fIcolor\fP] [\-background \fIcolor\fP] [\-window] [\-root] [\-mono] [\-install] [\-visual \fIvisual\fP] [\-ncolors \fIinteger\fP] [\-delay \fImicroseconds\fP] [\-count \fIinteger\fP] [\-decay] [\-no\-decay] [\-trail] [\-no\-trail] |
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| 7 | |
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| 8 | .SH DESCRIPTION |
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| 9 | The \fIgrav\fP program draws a simple orbital simulation |
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| 10 | .SH OPTIONS |
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| 11 | .I grav |
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| 12 | accepts the following options: |
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| 13 | .TP 8 |
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| 14 | .B \-window |
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| 15 | Draw on a newly-created window. This is the default. |
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| 16 | .TP 8 |
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| 17 | .B \-root |
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| 18 | Draw on the root window. |
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| 19 | .TP 8 |
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| 20 | .B \-mono |
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| 21 | If on a color display, pretend we're on a monochrome display. |
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| 22 | .TP 8 |
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| 23 | .B \-install |
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| 24 | Install a private colormap for the window. |
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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 \-ncolors \fIinteger\fP |
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| 31 | How many colors should be used (if possible). Default 200. |
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| 32 | The colors are chosen randomly. |
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| 33 | .TP 8 |
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| 34 | .B \-count \fIinteger\fP |
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| 35 | Default 12. |
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| 36 | .TP 8 |
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| 37 | .B \-decay |
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| 38 | .TP 8 |
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| 39 | .B \-no-\decay |
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| 40 | Whether orbits should decay. |
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| 41 | |
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| 42 | .TP 8 |
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| 43 | .B \-trail |
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| 44 | .TP 8 |
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| 45 | .B \-no\-trail |
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| 46 | Whether the objects should leave trails behind them (makes it look vaguely |
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| 47 | like a cloud-chamber. |
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| 48 | |
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| 49 | .SH ENVIRONMENT |
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| 50 | .PP |
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| 51 | .TP 8 |
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| 52 | .B DISPLAY |
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| 53 | to get the default host and display number. |
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| 54 | .TP 8 |
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| 55 | .B XENVIRONMENT |
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| 56 | to get the name of a resource file that overrides the global resources |
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| 57 | stored in the RESOURCE_MANAGER property. |
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| 58 | .SH SEE ALSO |
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| 59 | .BR X (1), |
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| 60 | .BR xscreensaver (1), |
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| 61 | .BR xlock (1) |
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| 62 | .SH COPYRIGHT |
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| 63 | Copyright \(co 1993 by Greg Bowering. |
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| 64 | |
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| 65 | Permission to use, copy, modify, and distribute this software and its |
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| 66 | documentation for any purpose and without fee is hereby granted, |
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| 67 | provided that the above copyright notice appear in all copies and that |
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| 68 | both that copyright notice and this permission notice appear in |
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| 69 | supporting documentation. |
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| 70 | .SH AUTHOR |
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| 71 | Greg Bowering <gb@pobox.com>, 1993. |
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| 72 | |
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| 73 | Ability to run standalone or with \fIxscreensaver\fP added by |
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| 74 | Jamie Zawinski <jwz@jwz.org>, 10-May-97. |
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