Provided by: xscreensaver-gl_5.08-0ubuntu3_i386 bug


        glblur - 3D radial blur texture fields


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


        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  repeat-
        edly  rendering increasingly-enlarged and increasingly-transparent ver-
        sions 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.


        -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
        -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  sec-
        -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?
        -fps    Display the current frame rate, CPU load, and polygon count.


        DISPLAY to get the default host and display number.
                to  get  the  name of a resource file that overrides the global
                resources stored in the RESOURCE_MANAGER property.
        X(1), xscreensaver(1)


        Copyright (C) 2002 by Jamie Zawinski.  Permission to use, copy, modify,
        distribute,  and  sell this software and its documentation for any pur-
        pose 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  repre-
        sentations are made about the suitability of this software for any pur-
        pose.  It is provided "as is" without express or implied warranty.


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