Provided by: xscreensaver-gl-extra_5.15-2ubuntu1_amd64 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.