DragonFly On-Line Manual Pages

substrate(6)                  XScreenSaver manual                 substrate(6)

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
       Copyright (C) 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

X Version 11                  5.34 (24-Oct-2015)                  substrate(6)