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    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 © 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.