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
11       delayms]     [-initial-cracks    numinitial]    [-max-cracks    nummax]
12       [-sand-grains numgrains] [-circle-percent circlepercent]
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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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20       Ported from the code by j.tarbell at http://complexification.net
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OPTIONS

23       substrate accepts the following options:
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25       -wireframe (Default: False)
26               Don't  draw  sand-painting  colored  effects, only make a wire‐
27               frame.
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29       -max-cycles cyclecount (Default: 10000)
30               Maximum number of growth cycles before restarting.  The  higher
31               this is, the more complex the art.
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33       -growth-delay delayms (Default: 18000)
34               Delay  in  ms  between  growth cycles.  More delay, slower (but
35               smoother and less CPU intensive) art.
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37       -initial-cracks numinitial (Default: 3)
38               Initial number of cracks in the substrate
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40       -max-cracks nummax (Default: 100)
41               Maximum number of cracks in the substrate at a single time
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43       -sand-grains numgrains (Default: 64)
44               Number of sand grains dropped  during  coloring.   More  grains
45               cause a denser colour but use more cpu power.
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47       -circle-percent circlepercent (Default: 0)
48               The percentage of the cracks will be circular.
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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       http://www.complexification.net).
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64       Ported  to  XScreensaver  2004  by  Mike  Kershaw  (dragorn@kismetwire‐
65       less.net)
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AUTHOR

68       J. Tarbell <complex@complexification.net>, Jun-03
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70       Mike Kershaw <dragorn@kismetwireless.net>, Oct-04
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74X Version 11                 5.05-3 (06-Apr-2008)                substrate(6x)
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