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Man Pages


Manual Reference Pages  -  SUBSTRATE (6)

NAME

substrate - Grow crystal-like lines on a computational substrate

CONTENTS

Synopsis
Description
Options
Environment
See Also
Copyright
Author

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 © 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

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