glblur man page

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)

Author

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

Info

5.36-4.fc26 (10-Feb-2017) X Version 11 XScreenSaver manual