trusty (6) substrate.6x.gz

Provided by: xscreensaver-data-extra_5.15-3+deb7u1ubuntu0.1_amd64 bug

NAME
       substrate - Grow crystal-like lines on a computational substrate


SYNOPSIS
       substrate   [-display   host:display.screen]   [-foreground   color]   [-background  color]  [-wireframe]
       [-max-cycles  cyclecount]  [-growth-delay  delayms]  [-initial-cracks  numinitial]  [-max-cracks  nummax]
       [-sand-grains numgrains] [-circle-percent circlepercent] [-fps]


DESCRIPTION
       Lines  like  crystals  grow  on  a  computational  substrate.  A simple perpendicular growth rule creates
       intricate city-like structures.  Optionally, cracks may also be  circular,  producing  a  cityscape  more
       familiar to places for which city planning is a distant, theoretical concern.

       Ported from the code by j.tarbell at http://complexification.net


OPTIONS
       substrate accepts the following options:

       -wireframe (Default: False)
               Don't draw sand-painting colored effects, only make a wireframe.

       -max-cycles cyclecount (Default: 10000)
               Maximum number of growth cycles before restarting.  The higher this is, the more complex the art.

       -growth-delay delayms (Default: 18000)
               Delay in ms between growth cycles.  More delay, slower (but smoother and less CPU intensive) art.

       -initial-cracks numinitial (Default: 3)
               Initial number of cracks in the substrate

       -max-cracks nummax (Default: 100)
               Maximum number of cracks in the substrate at a single time

       -sand-grains numgrains (Default: 64)
               Number  of  sand  grains dropped during coloring.  More grains cause a denser colour but use more
               cpu power.

       -circle-percent circlepercent (Default: 0)
               The percentage of the cracks will be circular.

       -fps    Display the current frame rate and CPU load.


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_MANAGER property.


SEE ALSO
       X(1), xscreensaver(1)


       Copyright © 2003 by J. Tarbell (complex@complexification.net, http://www.complexification.net).

       Ported to XScreensaver 2004 by Mike Kershaw (dragorn@kismetwireless.net)


AUTHOR
       J. Tarbell <complex@complexification.net>, Jun-03

       Mike Kershaw <dragorn@kismetwireless.net>, Oct-04