Provided by: xscreensaver-gl-extra_5.15-2ubuntu1_i386 bug

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 (C) 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.