crackberg man page

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

Synopsis

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]

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
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.

See Also

X(1), xscreensaver(1)

Author

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

Info

5.36-3.fc26 (21-Oct-2016) X Version 11 XScreenSaver manual