glblur(6) XScreenSaver manual glblur(6)

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 (C) 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.

X Version 11 6.09 (07-Jun-2024) glblur(6)