DragonFly On-Line Manual Pages

tessellimage(6)               XScreenSaver manual              tessellimage(6)

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] [-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.

       -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 (C) 2014 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                  5.34 (24-Oct-2015)               tessellimage(6)