nerverot - induces edginess in the viewer
nerverot [-display host:display.screen] [-foreground color] [-back-
ground 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 inte-
ger] [-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 number (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 doubleBuffer.
How many colors should be used (if possible). The colors form a
smooth ramp between two randomly-chosen colors. Defaults to 4,
The interframe delay, in microseconds. Defaults to 10000,
The maximum number of iterations (frames) before a new model is
generated. The actual number of iterations per model is a ran-
dom number between 1 and this value. Defaults to 1200, resource
How many "blots" to draw at a time. This number may be rounded
down to fit the particularly chosen model, and has a fixed min-
imum per-model. Defaults to 250, resource count.
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 iterAmt.
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
The maximum radius of blot nervousness, as a fraction of the
radius of the blot, in the range 0..1. Defaults to 0.7,
The minimum radius for a blot, in the range 1..100. Defaults to
3, resource minRadius.
The maximum radius for a blot, in the range 1..100. Defaults to
25, resource maxRadius.
The minimum overall scale of drawing, as a fraction of min(win-
dowHeight,windowWidth), in the range 0..10. Defaults to 0.6,
The maximum overall scale of drawing, as a fraction of min(win-
dowHeight,windowWidth), in the range 0..10. Defaults to 1.75,
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, pro-
vided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in sup-
porting documentation. No representations are made about the suitabil-
ity of this software for any purpose. It is provided "as is" without
express or implied warranty.
Dan Bornstein <danfuzzATmilk.com>.
X Version 11 4.21 (01-Mar-2005) XScreenSaver(6x)