twang(6) XScreenSaver manual twang(6) NAME twang - pluck pieces of the screen SYNOPSIS twang [--display host:display.screen] [--foreground color] [--background color] [--window] [--root] [--window-id number] [--mono] [--install] [--vi- sual visual] [--shm] [--no-shm] [--delay usecs] [--duration secs] [--bor- der-color color] [--border-width integer] [--event-chance fraction] [--friction fraction] [--springiness fraction] [--tile-size integer] [--transference fraction] [--fps] DESCRIPTION Twang 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. OPTIONS twang accepts the following options: --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. --mono If on a color display, pretend we're on a monochrome display. --install 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. --shm --no-shm Use the shared memory extension (or not, respectively), if avail- able. 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 delay. --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, re- source borderColor. --border-width integer Width of the border surrounding each tile. Defaults to 3, resource borderWidth. --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, resource eventChance. --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. De- faults 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 cen- ter (resting point). Defaults to 0.1, resource springiness. --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 trans- ference. --fps Display the current frame rate and CPU load. ENVIRONMENT DISPLAY to get the default host and display number. XENVIRONMENT to get the name of a resource file that overrides the global re- sources stored in the RESOURCE_MANAGER property. XSCREENSAVER_WINDOW The window ID to use with --root. X RESOURCES There are resource equivalents for each option, noted above. BUGS twang should have more interesting events. Ways of speeding it up need to be investigated. It's kinda sluggish, especially on hugeass displays. SEE ALSO xscreensaver(1) COPYRIGHT Copyright (C) 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 copy- right 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 Dan Bornstein <danfuzz@milk.com>. X Version 11 6.15 (30-Mar-2026) twang(6)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | ENVIRONMENT | X RESOURCES | BUGS | SEE ALSO | COPYRIGHT | AUTHOR
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