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)