Provided by: xscreensaver-data-extra_4.23-4ubuntu8_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]


       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.


       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 <>.