Section: XScreenSaver manual (6)
Updated: 5.40 (12-Aug-2018)
twang - pluck pieces of the screen
divides the screen into equal-sized tiles, and then plucks
them in various ways. Tiles are affected by their neighbors, so waves
of motion flow through the grid. This manpage
describes v1.3 of the program.
accepts the following options:
Draw on a newly-created window. This is the default.
Draw on the root window.
If on a color display, pretend we're on a monochrome display.
Install a private colormap for the window.
- -visual visual
Which visual to use. Legal values are the name of a visual class,
or the id number (decimal or hex) of a specific visual.
Use the shared memory extension (or not, respectively), if available.
This may speed things
up a bit, but probably won't make that much difference. If available,
defaults to true, resource useSHM.
- -delay microseconds
The interframe delay, in microseconds. Defaults to 10000, resource
- -duration seconds
How long to run before loading a new image. Default 120 seconds.
- -border-color color
Color of the border surrounding each tile. Defaults to blue, resource
- -border-width integer
Width of the border surrounding each tile. Defaults to 3, resource
- -event-chance fraction
The chance, per iteration, for an event to occur (such as tweaking
the orientation of a tile), in the range 0..1. Defaults to 0.01,
- -friction fraction
How much friction there is in the system, in the range 0..1.
This is the amount by which velocities are damped per iteration.
Defaults to 0.05, resource friction.
- -springiness fraction
How springy the tiles are, in the range 0..1.
This is the fraction of an orientation that gets turned into a velocity
towards the center (resting point). Defaults to 0.1, resource
- -tile-size integer
Size (width and height) of each tile, not including the outer edge
of the border. Defaults to 120, resource tileSize.
- -transference fraction
How much a tile's neighbors affect it, in the range 0..1.
This is the fraction of an orientation of a neighbor that gets turned
into a velocity in the same direction Defaults to 0.025, resource
Display the current frame rate and CPU load.
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.
There are resource equivalents for each option, noted above.
should have more interesting events.
- Ways of speeding it up need to be investigated. It's kinda sluggish,
especially on hugeass displays.
Copyright © 2002 by Dan Bornstein. All rights reserved.
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
Dan Bornstein <email@example.com