tessellimage(6x) XScreenSaver manual tessellimage(6x)
NAME
tessellimage - Converts an image to triangles using Delaunay tessella-
tion.
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 ani-
mates the result at various depths. More triangles are allocated to
visually complex parts of the image. This is accomplished by first com-
puting 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 thresh-
old: those are the pixels that have the largest change in color/bright-
ness.
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 sec-
onds).
-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, mod-
ify, distribute, and sell this software and its documentation for any
purpose is hereby granted without fee, provided that the above copy-
right notice appear in all copies and that both that copyright notice
and this permission notice appear in supporting documentation. No rep-
resentations 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)
Generated by dwww version 1.14 on Fri Jan 24 06:28:30 CET 2025.