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] [--window-id number] [--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.

--window-id number
Draw on the specified 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.

XSCREENSAVER_WINDOW
The window ID to use with --root.

SEE ALSO

X(1), xscreensaver(1)

COPYRIGHT

Copyright (C) 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 6.09 (07-Jun-2024) tessellimage(6)