glblur - 3D radial blur texture fields

       Jamie Zawinski, with inspiration from a tutorial by Dario Corno.

X Version 11                                   6.08 (10-Oct-2023)                                     glblur(6x)

       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.

       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.

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.

       glblur - 3D radial blur texture fields

--visualvisual
               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-idnumber
               Draw on the specified window.

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

       --blursizenumber
               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.

X(1), xscreensaver(1)

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