XScreenSaver(r)                                   XScreenSaver(r)



NAME
       nerverot - induces edginess in the viewer

SYNOPSIS
       nerverot   [-display   host:display.screen]   [-foreground
       color]  [-background  color]  [-window]  [-root]   [-mono]
       [-install]  [-visual visual] [-db] [-no-db] [-colors inte-
       ger] [-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]

DESCRIPTION
       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.

OPTIONS
       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
               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.

       -db     -no-db  Use  double-buffering  (or  not,   respec-
               tively).  Double-buffering  may  make  things look
               better for larger line widths and/or  larger  num-
               bers 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.

       -colors integer
               How many colors should be used (if possible).  The
               colors  form  a  smooth ramp between two randomly-
               chosen colors. Defaults to 4, resource colors.

       -delay microseconds
               The interframe delay, in microseconds. Defaults to
               10000, resource delay.

       -max-iters integer
               The maximum number of iterations (frames) before a
               new model is generated. The actual number of iter-
               ations  per model is a random number between 1 and
               this value. Defaults to 1200, resource maxIters.

       -count integer
               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, resource count.

       -line-width integer
               The  width  of the lines to draw. 0 means an opti-
               mized pixel-thick line.  Defaults to  0,  resource
               lineWidth.

       -event-chance fraction
               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.

       -iter-amt fraction
               The fraction of movement towards a target (such as
               rotation  angle  or scale) that happens per itera-
               tion,  in  the  range  0..1.  Defaults  to   0.01,
               resource terAmt.

       -nervousness fraction
               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.

       -max-nerve-radius fraction
               The maximum radius of blot nervousness, as a frac-
               tion of the radius of the blot, in the range 0..1.
               Defaults to 0.7, resource maxNerveRadius.

       -min-radius integer
               The  minimum  radius  for  a  blot,  in  the range
               1..100. Defaults to 3, resource minRadius.

       -max-radius integer
               The maximum  radius  for  a  blot,  in  the  range
               1..100. Defaults to 25, resource maxRadius.

       -min-scale fraction
               The  minimum  overall scale of drawing, as a frac-
               tion  of  min(windowHeight,windowWidth),  in   the
               range 0..10. Defaults to 0.6, resource minScale.

       -max-scale fraction
               The  maximum  overall scale of drawing, as a frac-
               tion  of  min(windowHeight,windowWidth),  in   the
               range  0..10. Defaults to 1.75, resource maxScale.

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_MAN-
               AGER property.

X RESOURCES
       There are resource  equivalents  for  each  option,  noted
       above.

BUGS
       nerverot should have more models.

       XDBE should be detected and used, if available.

SEE ALSO
       xscreensaver(r)

COPYRIGHT
       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 suit-
       ability 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               20-Mar-2001            XScreenSaver(r)