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NAME

       hilbert - 3D Hilbert fractal.

SYNOPSIS

       hilbert  [-display host:display.screen] [-visual visual] [-window] [-root] [-delay number]
       [-speed ratio] [-depth number] [-spin] [-wander] [-2d] [-3d] [-closed] [-open] [-max-depth
       number] [-thickness ratio] [-wireframe] [-fps]

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.

OPTIONS

       -visual visual
               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.

       -window Draw on a newly-created window.  This is the default.

       -root   Draw on the root window.

       -delay number
               Per-frame delay, in microseconds.  Default: 30000 (0.03 seconds.).

       -speed number
               How  fast  the  animation  should run.  Less than 1 for slower, greater than 1 for
               faster.

       -max-depth number
               Max depth to descend.  Default: 5, which peaks at around half a million polygons.

       -spin   -no-spin Whether to rotate the object.  Default: true.

       -wander -no-wander Whether to wander the object around on the screen.  Default: false;

       -2d     -3d Whether to draw the 2D or 3D variant. Default: random.

       -closed -open Whether to draw the open or closed-path variant. Default: random.

       -thickness ratio
               How thick the lines should be.  Default: 0.25.

       -wireframe
               Render in wireframe instead of solid.

       -fps    Display the current frame rate, CPU load, and polygon count.

ENVIRONMENT

       DISPLAY to get the default host and display number.

       XENVIRONMENT
               to get the name of a resource file that overrides the global resources  stored  in
               the RESOURCE_MANAGER property.

SEE ALSO

       X(1), xscreensaver(1)

COPYRIGHT

       Copyright © 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.

AUTHOR

       Jamie Zawinski.