substrate(6)                  XScreenSaver manual                 substrate(6)

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

SYNOPSIS
       substrate [--display host:display.screen] [--visual visual] [--window]
       [--root] [--window-id number] [--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.

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.

       --visual visual
               Specify which visual to use.  Legal values are the name of a
               visual class, or the id number (decimal or hex) of a specific
               visual.

       --window
               Draw on a newly-created window.  This is the default.

       --root  Draw on the root window.

       --window-id number
               Draw on the specified window.

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.

       XSCREENSAVER_WINDOW
               The window ID to use with --root.

SEE ALSO
       X(1), xscreensaver(1)

COPYRIGHT
       Copyright (C) 2003 by J. Tarbell <complex@complexification.net>.
       XScreenSaver port: Mike Kershaw <dragorn@kismetwireless.net>

AUTHOR
       J. Tarbell <complex@complexification.net>, Jun 2003.
       Mike Kershaw <dragorn@kismetwireless.net>, Oct 2004.

X Version 11                  6.09 (07-Jun-2024)                  substrate(6)