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

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

X Version 11                                   6.08 (10-Oct-2023)                                  crackberg(6x)

       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 warranty.

       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.

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.

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

crackberg accepts the following options:

       --root  Draw on the root window.

       --window-idnumber
               Draw on the specified window.

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

       --install
               Install a private colormap for the window.

       --visualvisual
               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.

       --delaymicroseconds
               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).

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

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

       --nsubdivsinteger
               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.

X(1), xscreensaver(1)

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]