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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]  [--dis-
       play  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 se-
	       lects 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 cur-
	       rent 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,  mod-
       ify,  distribute,  and sell this	software and its documentation for any
       purpose is hereby granted without fee, provided that  the  above	 copy-
       right  notice  appear in	all copies and that both that copyright	notice
       and this	permission notice appear in supporting documentation.  No rep-
       resentations 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)

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