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]
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
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.
Display the current frame rate and CPU load.
to get the default host and display number.
to get the name of a resource file that overrides the global resources stored in the RESOURCE_MANAGER property.
Copyright © 2003 by J. Tarbell (firstname.lastname@example.org, http://www.complexification.net).
Ported to XScreensaver 2004 by Mike Kershaw (email@example.com)
J. Tarbell <firstname.lastname@example.org>, Jun-03
Mike Kershaw <email@example.com>, Oct-04