Provided by: xscreensaver-data-extra_5.15-2ubuntu1_i386 bug


       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] [-fps]


       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.

       -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,  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.

       -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  iterations  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  optimized  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 iteration, in the range  0..1.
               Defaults to 0.01, resource iterAmt.

       -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

       -max-nerve-radius fraction
               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.

       -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  fraction  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  fraction  of
               min(windowHeight,windowWidth), in the range 0..10. Defaults  to
               1.75, resource maxScale.

       -fps    Display the current frame rate and CPU load.


       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 © 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 <>.