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substrate

Section: XScreenSaver manual (6)
Updated: 5.04 (13-Nov-2007)
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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]  

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.
 

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 © 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


 

Index

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
ENVIRONMENT
SEE ALSO
COPYRIGHT
AUTHOR




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