Provided by: xscreensaver-gl-extra_5.08-0ubuntu5_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
       compute  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.

SEE ALSO

       X(1), xscreensaver(1)

COPYRIGHT

       Copyright  ©  2007 by Jamie Zawinski.  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

       Jamie Zawinski.