NAME

       tessellimage - Converts an image to triangles using Delaunay tessellation.

SYNOPSIS

       tessellimage [-display host:display.screen] [-visual visual] [-window] [-root] [-delay number] [-duration
       number]  [-duration2 number] [-max-depth number] [-max-resolution pixels] [-no-outline] [-no-fill-screen]
       [-fps]

DESCRIPTION

       Converts an image to triangles using Delaunay tessellation, and animates the result  at  various  depths.
       More  triangles  are  allocated  to  visually  complex  parts of the image. This is accomplished by first
       computing the first derivative of the image: the distance between each pixel and its neighbors. Then  the
       Delaunay  control  points  are  chosen  by selecting those pixels whose distance value is above a certain
       threshold: those are the pixels that have the largest change in color/brightness.

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: 30000 (0.03 seconds).

       -duration number
               Length of time until loading a new image. Default: 2 minutes.

       -duration2 number
               Length of time until increasing or decreasing the triangulation depth.  Default: 0.4 seconds.

       -max-depth number
               The maximum number of triangles to render.  Default: 40000.

       -max-resolution pixels
               The size of the loaded image will be constrained to this width or height, to reduce the number of
               pixels examined.  Think of it as an initial low-pass filter.  Default 1024.

       -outline | -no-outline
               Whether to outline the triangles.

       -fill-screen | -no-fill-screen
               Whether to zoom in on the image to completely fill the screen, or to center it.

       -fps | -no-fps
               Whether to show a frames-per-second display at the bottom of the screen.

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 © 2014-2018 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.

X Version 11                                   5.45 (08-Dec-2020)                               tessellimage(6x)