Provided by: xscreensaver-gl_5.15-2ubuntu1_amd64 bug

NAME

       glschool - a 3D schooling simulation

SYNOPSIS

       glschool  [-display  host:display.screen]  [-visual visual] [-window] [-root] [-wireframe]
       [-fps] [-delay number]  [-nfish  number]  [-maxvel  number]  [-minvel  number]  [-acclimit
       number]  [-avoidfact number] [-matchfact number] [-centerfact number] [-targetfact number]
       [-minradius  number]  [-momentum  number]  [-distexp  number]  [-goalchgf  number]  [-fog]
       [-drawgoal] [-drawbbox]

DESCRIPTION

       Uses   Craig   Reynolds   Boids   algorithm   to  simulate  a  3d  school  of  fish.   See
       <http://www.red3d.com/cwr/boids> for a description  of  the  algorithm  and  the  original
       paper.  This is a lightly modified version of the algorithm that supports goal attraction.

       Many  different  behaviors are possible by tweaking the parameters.  No sanity checking is
       performed on the command line params, so if you want  to  use  negative  accelerations  or
       minimum  velocity  that  is  larger  than  maximum  velocity  or  that  sort of thing, the
       simulation will try to digest it.

       It looks best with the highest number of fish that will give you an FPS of > 25 or so.

OPTIONS

       -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.

       -delay number
               Per-frame delay, in microseconds.  Default: 20000 (0.020 seconds.).

       -wireframe | -no-wireframe
               Render in wireframe instead of solid.

       -fps    Display the current frame rate, CPU load, and polygon count.

       -fog | -no-fog
                Whether to show foggy (cloudy) water.

       -drawgoal | -no-drawgoal
                Whether to show the school's attraction goal.

       -drawbbox | -no-drawbbox
                Whether to show the bounding box.

       -fog | -no-fog
                Whether to show foggy (cloudy) water.

       -nfish number
               Number of fish.  Defaults to 100

       -acclimit number
               Acceleration limit.  Defaults to 8.0

       -minvel number
               Minimum velocity.  Defaults to 1.0

       -maxvel number
               Minimum velocity.  Defaults to 7.0

       -goalchgf number
               Goal change frequency.  Defaults to 50 (frames)

       -avoidfact number
               Avoidance acceleration factor.  Defaults to 1.5

       -matchfact number
               Match avg velocity acceleration factor.  Defaults to 0.15

       -centerfact number
               School centering acceleration factor.  Defaults to 0.1

       -targetfact number
               Target attraction acceleration factor.  Defaults to 80

       -distexp number
               Distance weighting exponent.  Defaults to 2.2

       -momentum number
               Momentum.  Defaults to 0.9

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.

SEE ALSO

       X(1), xscreensaver(1)

COPYRIGHT

       Copyright © 2005-2006 by David C. Lambert.  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.

AUTHOR

       David C. Lambert