nerverot - induces edginess in the viewer
nerverot [-display host:display.screen] [-foreground color] [-background color] [-window]
[-root] [-mono] [-install] [-visual visual] [-db] [-no-db] [-colors integer] [-delay
microseconds] [-count integer] [-line-width integer] [-event-chance fraction] [-iter-amt
fraction] [-nervousness fraction] [-max-nerve-radius fraction] [-min-radius integer]
[-max-radius integer] [-min-scale fraction] [-max-scale fraction]
The goal of nerverot is to be interesting and compelling to watch, yet induce a state of
nervous edginess in the viewer. This manpage describes v1.3 of the program.
nerverot accepts the following options:
-window Draw on a newly-created window. This is the default.
-root Draw on the root window.
-mono If on a color display, pretend we're on a monochrome display.
Install a private colormap for the window.
Which visual to use. Legal values are the name of a visual class, or the id num-
ber (decimal or hex) of a specific visual.
-db -no-db Use double-buffering (or not, respectively). Double-buffering may make
things look better for larger line widths and/or larger numbers of blots, but
"better" may equate to yielding less of the desired edginess effect. You'll be
calmer after watching the double-buffered variant; you're more likely to go into
epileptic fits with it off. Hence, it is off (false) by default, resource double-
How many colors should be used (if possible). The colors form a smooth ramp
between two randomly-chosen colors. Defaults to 4, resource colors.
The interframe delay, in microseconds. Defaults to 10000, resource delay.
The maximum number of iterations (frames) before a new model is generated. The
actual number of iterations per model is a random number between 1 and this value.
Defaults to 1200, resource maxIters.
How many "blots" to draw at a time. This number may be rounded down to fit the
particularly chosen model, and has a fixed minimum per-model. Defaults to 250,
The width of the lines to draw. 0 means an optimized pixel-thick line. Defaults
to 0, resource lineWidth.
The chance, per iteration, for a life-altering event to occur (such as picking a
new rotation target), in the range 0..1. Defaults to 0.2, resource eventChance.
The fraction of movement towards a target (such as rotation angle or scale) that
happens per iteration, in the range 0..1. Defaults to 0.01, resource terAmt.
How nervous the drawing is, in the range 0..1. This is how jumpy the points on
each blot are. Defaults to 0.3, resource nervousness.
The maximum radius of blot nervousness, as a fraction of the radius of the blot,
in the range 0..1. Defaults to 0.7, resource maxNerveRadius.
The minimum radius for a blot, in the range 1..100. Defaults to 3, resource minRa-
The maximum radius for a blot, in the range 1..100. Defaults to 25, resource
The minimum overall scale of drawing, as a fraction of min(windowHeight,win-
dowWidth), in the range 0..10. Defaults to 0.6, resource minScale.
The maximum overall scale of drawing, as a fraction of min(windowHeight,win-
dowWidth), in the range 0..10. Defaults to 1.75, resource maxScale.
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.
There are resource equivalents for each option, noted above.
nerverot should have more models.
XDBE should be detected and used, if available.
Copyright (C) 2000-2001 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 implied warranty.
Dan Bornstein <firstname.lastname@example.org>.
X Version 11 20-Mar-2001 XScreenSaver(1)