1substrate(6x)                 XScreenSaver manual                substrate(6x)
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NAME

6       substrate - Grow crystal-like lines on a computational substrate
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SYNOPSIS

9       substrate  [-display  host:display.screen]  [-foreground color] [-back‐
10       ground color] [-wireframe] [-max-cycles cyclecount] [-growth-delay  de‐
11       layms]  [-initial-cracks numinitial] [-max-cracks nummax] [-sand-grains
12       numgrains] [-circle-percent circlepercent] [-fps]
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DESCRIPTION

15       Lines like crystals grow on a computational substrate.  A  simple  per‐
16       pendicular growth rule creates intricate city-like structures.  Option‐
17       ally, cracks may also be circular, producing a cityscape more  familiar
18       to places for which city planning is a distant, theoretical concern.
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OPTIONS

21       substrate accepts the following options:
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23       -wireframe (Default: False)
24               Don't  draw  sand-painting  colored  effects, only make a wire‐
25               frame.
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27       -max-cycles cyclecount (Default: 10000)
28               Maximum number of growth cycles before restarting.  The  higher
29               this is, the more complex the art.
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31       -growth-delay delayms (Default: 18000)
32               Delay  in  ms  between  growth cycles.  More delay, slower (but
33               smoother and less CPU intensive) art.
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35       -initial-cracks numinitial (Default: 3)
36               Initial number of cracks in the substrate
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38       -max-cracks nummax (Default: 100)
39               Maximum number of cracks in the substrate at a single time
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41       -sand-grains numgrains (Default: 64)
42               Number of sand grains dropped  during  coloring.   More  grains
43               cause a denser colour but use more cpu power.
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45       -circle-percent circlepercent (Default: 0)
46               The percentage of the cracks will be circular.
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48       -fps    Display the current frame rate and CPU load.
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ENVIRONMENT

51       DISPLAY to get the default host and display number.
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53       XENVIRONMENT
54               to  get  the  name of a resource file that overrides the global
55               resources stored in the RESOURCE_MANAGER property.
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SEE ALSO

58       X(1), xscreensaver(1)
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61       Copyright © 2003 by J. Tarbell <complex@complexification.net>.
62       XScreenSaver port: Mike Kershaw <dragorn@kismetwireless.net>
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AUTHOR

65       J. Tarbell <complex@complexification.net>, Jun 2003.
66       Mike Kershaw <dragorn@kismetwireless.net>, Oct 2004.
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70X Version 11               6.04-1.fc36 (06-Jun-2022)             substrate(6x)
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