.TH anemotaxis 6 "6.09 (07-Jun-2024)" "X Version 11" "XScreenSaver manual"
.SH NAME
anemotaxis \- directional search on a plane.
.SH SYNOPSIS
.B anemotaxis
[\-\-display \fIhost:display.screen\fP]
[\-\-visual \fIvisual\fP]
[\-\-window]
[\-\-root]
[\-\-window\-id \fInumber\fP]
[\-\-delay \fInumber\fP]
[\-\-distance \fInumber\fP]
[\-\-sources \fInumber\fP]
[\-\-searchers \fInumber\fP]
[\-\-fps]
.SH DESCRIPTION
The program demonstrates a search algorithm designed for locating a
source of odor in turbulent atmosphere. The odor is convected by wind
which has a constant mean direction and fluctuations around it. The
searcher is able to sense the odor and determine local instantaneous
wind direction. The goal is to find the source in the shortest mean
time.  Some animals face this task to find mates, food, home etc. They
exhibit very particular, zigzagging search trajectories.

This is modeled as a search on a discrete two-dimensional lattice. The
source releases particles that drift with constant velocity in one
direction and walk randomly in the other direction. The searcher knows
if it hit a particle, and if so, particle's position one time step
earlier (local wind direction). The program paints sources and
particles released by them as well as trajectories of searchers who are
trying to capture the sources.
.SH OPTIONS
.TP 8
.B \-\-visual \fIvisual\fP
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.
.TP 8
.B \-\-window
Draw on a newly-created window.  This is the default.
.TP 8
.B \-\-root
Draw on the root window.
.TP 8
.B \-\-window\-id \fInumber\fP
Draw on the specified window.
.TP 8
.B \-\-delay \fInumber\fP
Per-frame delay, in microseconds.  Default: 20000 (0.02 seconds.).
.TP 8
.B \-\-distance \fInumber\fP
Max initial distance to the source .  10 - 250.  Default: 40.
.TP 8
.B \-\-sources \fInumber\fP
Max number of sources.  Default: 25.
.TP 8
.B \-\-searchers \fInumber\fP
Max number of searchers. Default: 25.
.TP 8
.B \-\-fps
Display the current frame rate and CPU load.
.SH ENVIRONMENT
.PP
.TP 8
.B DISPLAY
to get the default host and display number.
.TP 8
.B XENVIRONMENT
to get the name of a resource file that overrides the global resources
stored in the RESOURCE_MANAGER property.
.TP 8
.B XSCREENSAVER_WINDOW
The window ID to use with \fI\-\-root\fP.
.SH SEE ALSO
.BR X (1),
.BR xscreensaver (1)
.SH COPYRIGHT
Copyright \(co 2004 by Eugene Balkovsky.  Permission to use, copy, modify, 
distribute, and sell this software and its documentation for any purpose is 
hereby granted without fee, provided that the above copyright notice appear 
in all copies and that both that copyright notice and this permission notice
appear in supporting documentation.  No representations are made about the 
suitability of this software for any purpose.  It is provided "as is" without
express or implied warranty.
.SH AUTHOR
Eugene Balkovsky