From http://www.jwz.org/xscreensaver/xscreensaver-5.24.tar.gz

[xscreensaver] / hacks / glx / hilbert.man

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-.TH XScreenSaver 1 "" "X Version 11"
-.SH NAME
-hilbert - 3D Hilbert fractal.
-.SH SYNOPSIS
-.B hilbert
-[\-display \fIhost:display.screen\fP]
-[\-visual \fIvisual\fP]
-[\-window]
-[\-root]
-[\-delay \fInumber\fP]
-[\-speed \fIratio\fP]
-[\-depth \fInumber\fP]
-[\-spin]
-[\-wander]
-[\-2d]
-[\-3d]
-[\-closed]
-[\-open]
-[\-max\-depth \fInumber\fP]
-[\-thickness \fIratio\fP]
-[\-wireframe]
-[\-fps]
-.SH DESCRIPTION
-This draws the recursive Hilbert space-filling curve, in both 2D and
-3D variants.  It incrementally animates the growth and recursion to
-the maximum depth, then unwinds it back.
-
-The Hilbert path is a single contiguous line that can fill a volume
-without crossing itself.  As a data structure, Hilbert paths are
-useful because ordering along the curve preserves locality: points
-that close together along the curve are also close together in space.
-The converse is often, but not always, true.  The coloration
-reflects this.
-.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: 30000 (0.03 seconds.).
-.TP 8
-.B \-speed \fInumber\fP
-How fast the animation should run.
-Less than 1 for slower, greater than 1 for faster.
-.TP 8
-.B \-max\-depth \fInumber\fP
-Max depth to descend.  Default: 5, which peaks at around half a
-million polygons.
-.TP 8
-.B \-spin
-.B \-no\-spin
-Whether to rotate the object.  Default: true.
-.TP 8
-.B \-wander
-.B \-no\-wander
-Whether to wander the object around on the screen.  Default: false;
-.TP 8
-.B \-2d
-.B \-3d
-Whether to draw the 2D or 3D variant. Default: random.
-.TP 8
-.B \-closed
-.B \-open
-Whether to draw the open or closed-path variant. Default: random.
-.TP 8
-.B \-thickness \fIratio\fP
-How thick the lines should be.  Default: 0.25.
-.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 2011 by Jamie Zawinski.  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
-Jamie Zawinski.