From http://www.jwz.org/xscreensaver/xscreensaver-5.25.tar.gz

[xscreensaver] / hacks / glx / extrusion.man

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+.TH XScreenSaver 1 "" "X Version 11"
+.SH NAME
+extrusion - various rotating extruded shapes.
+.SH SYNOPSIS
+.B extrusion
+[\-display \fIhost:display.screen\fP]
+[\-visual \fIvisual\fP]
+[\-window]
+[\-root]
+[\-delay \fInumber\fP]
+[\-name \fIwhich\fP]
+[\-no-light]
+[\-wireframe]
+[\-fps]
+.SH DESCRIPTION
+Draws various rotating extruded shapes that twist around, lengthen, and
+turn inside out.
+.SH OPTIONS
+.TP 8
+.B \-visual \fIvisual\fP
+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.
+.TP 8
+.B \-window
+Draw on a newly-created window.  This is the default.
+.TP 8
+.B \-root
+Draw on the root window.
+.TP 8
+.B \-delay \fInumber\fP
+Per-frame delay, in microseconds.  Default: 10000 (0.01 seconds.).
+.TP 8
+.B \-name \fIwhich\fP
+Which object to draw.  Choices are: helix2, helix3, helix4, joinoffset,
+screw, taper, and twistoid.
+.TP 8
+.B \-light | \-no-light
+Whether to light the scene, or use flat coloring.
+.TP 8
+.B \-bitmap \fIfile\fP
+The texture map to use.
+.TP 8
+.B \-wireframe
+Render in wireframe instead of solid.
+.TP 8
+.B \-fps
+Display the current frame rate, CPU load, and polygon count.
+.SH ENVIRONMENT
+.PP
+.TP 8
+.B DISPLAY
+to get the default host and display number.
+.TP 8
+.B XENVIRONMENT
+to get the name of a resource file that overrides the global resources
+stored in the RESOURCE_MANAGER property.
+.SH SEE ALSO
+.BR X (1),
+.BR xscreensaver (1)
+.SH COPYRIGHT
+Copyright \(co 2002 by Linas Vepstas and David Konerding.  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 provided "as is" without express
+or implied warranty.
+.SH AUTHOR
+This screensaver was created by David Konerding from the samples that
+come with the GL Extrusion library by Linas Vepstas.