crackberg(6) XScreenSaver manual crackberg(6)

NAME

crackberg - Lose your way wandering some height fields, and enjoy
candy.

SYNOPSIS

crackberg [--root] [--window-id number] [--window] [--install]
[--display host:display.screen] [--visual visual] [--window-id id]
[--delay usecs] [--fps] [--crack] [--lit] [--boring] [--letterbox]
[--flat] [--wire] [--nowater] [--visibility float] [--color string]
[--nsubdivs integer]

DESCRIPTION

Flies through height maps, optionally animating the instantiation and
destruction of generated tiles; by default, tiles 'grow' into place
(height gradually increased up to correct value). In windowed mode
the following key controls are available:

left, right
Turn left and right.

a,w,s,d Move left, forwards, backwards, and to the right,
respectively.

1,2 Decrease and increase manual speed, respectively.

Spacebar
Return to automatic control.

OPTIONS

crackberg accepts the following options:

--root Draw on the root window.

--window-id number
Draw on the specified window.

--window
Draw on a newly-created window. This is the default.

--install
Install a private colormap for the window.

--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.

--delay microseconds
Delay between frames; default 20000 (1/50th of a second).

--fps Display the current frame rate, CPU load, and polygon count.

--crack Use all possible methods to animate tile instantiation.

--boring
Do not animate instatiation at all; use this to get standard
landscape generator behavior.

--letterbox
Drawable window region has a 16:9 aspect ratio, regardless of
actual window size.

--lit Enable lighting.

--flat Flat shading (OpenGL will use one color per primitive, rather
than interpolating betwixt vertices).

--wire Wireframe.

--nowater
Do not display 'water' (forces negative values to zero, and
selects a different coloring method).

--visibility float
Value in range [0.2,1.0] (default 0.6) specifying proportion
of viewable XY plane which is to be drawn upon.

--color string
Selects color scheme. Use with no or bogus argument for
current list.

--nsubdivs integer
Number of times to recursively subdivide each triangular
tile. Each increment increases total triangles by a factor
of 4; for instance the default setting 4 results in 256
triangles per tile.

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) 2005 by Matus Telgarsky. 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

Matus Telgarsky <catachresis@cmu.edu>, 2005.

X Version 11 6.09 (07-Jun-2024) crackberg(6)