Provided by: xscreensaver-gl_5.08-0ubuntu3_i386 bug
 

NAME

        voronoi - draws a randomly-colored Voronoi tessellation
 

SYNOPSIS

        voronoi   [-display  host:display.screen]  [-visual  visual]  [-window]
        [-root]  [-points   int]   [-point-size   int]   [-point-speed   ratio]
        [-point-delay seconds] [-zoom-speed ratio] [-zoom-delay seconds] [-fps]
 

DESCRIPTION

        Draws a randomly-colored Voronoi tessellation, and  periodically  zooms
        in and adds new points.  The existing points also wander around.
 
        There are a set of control points on the plane, each at the center of a
        colored cell.  Every pixel within that cell is closer  to  that  cell's
        control point than to any other control point.  That is what determines
        the cell's shapes.
 
        When running in a window, you can click  to insert a new point  at  the
        mouse position.  Clicking on an existing point lets you drag it around.
 
        This implementation takes advantage of the OpenGL depth buffer to  com-
        pute  the  cells  for  us, by rendering the intersection of overlapping
        cones in an orthographic plane.
 

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.
 
        -points int
                How many points to add each time we zoom in.
 
        -point-size int
                How big to draw the stars, in pixels.  0 for no stars.
 
        -point-speed ratio
                How fast the points should wander.  Less  than  1  for  slower,
                greater than 1 for faster.
 
        -point-delay seconds
                How quickly to insert new points, when adding.
 
        -zoom-speed ratio
                How  fast  to  zoom in.  Less than 1 for slower, greater than 1
                for faster.
 
        -zoom-delay seconds
                Zoom in every this-many seconds.
 
        -fps    Display the current frame rate, CPU load, and polygon count.
 

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.
        X(1), xscreensaver(1)
 

COPYRIGHT

        Copyright (C) 2007 by Jamie Zawinski.  Permission to use, copy, modify,
        distribute, and sell this software and its documentation for  any  pur-
        pose  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 repre-
        sentations are made about the suitability of this software for any pur-
        pose.  It is provided "as is" without express or implied warranty.
 

AUTHOR

        Jamie Zawinski.