Provided by: xscreensaver-gl_5.04-4ubuntu1_i386 bug

NAME

       glblur - 3D radial blur texture fields

SYNOPSIS

       glblur   [-display   host:display.screen]  [-visual  visual]  [-window]
       [-root] [-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.

       -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 | -no-fps
               Whether  to  show  a frames-per-second display at the bottom of
               the screen.

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  ©  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.