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crackberg - Man Page

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


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]


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.


Move left, forwards, backwards, and to the right, respectively.


Decrease and increase manual speed, respectively.


Return to automatic control.


crackberg accepts the following options:


Draw on the root window.

--window-id number

Draw on the specified window.


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


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).


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


Use all possible methods to animate tile instantiation.


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.


Enable lighting.


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).

--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.



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.


The window ID to use with --root.

See Also

X(1), xscreensaver(1)


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


6.09-1.fc41 (11-Jun-2024) X Version 11 XScreenSaver manual