NAME

       glblur - 3D radial blur texture fields

SYNOPSIS

       glblur  [--display host:display.screen] [--visual visual] [--window] [--root] [--window-id
       number] [--delay number] [--blursize  number]  [--no-wander]  [--no-spin]  [--spin  [XYZ]]
       [--fps]

DESCRIPTION

       This program draws a box and a few line segments, and generates a radial blur outward from
       it.  This creates flowing field effects.

       This is done by rendering the scene  into  a  small  texture,  then  repeatedly  rendering
       increasingly-enlarged and increasingly-transparent versions of that texture onto the frame
       buffer.  As such, it's quite graphics intensive: don't bother trying to run  this  if  you
       don't have hardware-accelerated texture support.  It will hurt your machine bad.

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.

       --window-id number
               Draw on the specified window.

       --delay number
               Per-frame delay, in microseconds.  Default: 10000 (0.01 seconds.).

       --blursize number
               How many copies of the scene  should  be  laid  down  to  make  the  vapor  trail.
               Default: 15.  Larger numbers create smoother fields, but are slower.

       --wander | --no-wander
               Whether the object should wander around the screen.

       --spin [XYZ]
               Around which axes should the object spin?

       --no-spin
               None.

       --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.

       XSCREENSAVER_WINDOW
               The window ID to use with --root.

SEE ALSO

       X(1), xscreensaver(1)

COPYRIGHT

       Copyright © 2002 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, with inspiration from a tutorial by Dario Corno.