Provided by: xscreensaver-gl-extra_5.07-0ubuntu3_i386
crackberg - Lose your way wandering some height fields, and enjoy
crackberg [-root] [-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]
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:
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.
Return to automatic control.
crackberg accepts the following options:
-root Draw on the root window.
-window Draw on a newly-created window. This is the default.
Install a private colormap for the window.
Specify which visual to use. Legal values are the name of a
visual class, or the id number (decimal or hex) of a specific
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.
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).
Do not display ’water’ (forces negative values to zero, and
selects a different coloring method).
Value in range [0.2,1.0] (default 0.6) specifying proportion of
viewable XY plane which is to be drawn upon.
Selects color scheme. Use with no or bogus argument for
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
DISPLAY to get the default host and display number.
to get the name of a resource file that overrides the global
resources stored in the RESOURCE_MANAGER property.
Copyright © 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
Matus Telgarsky <email@example.com>, 2005.