NAME

       blocktube - draws a swirling, falling tunnel of reflective slabs

SYNOPSIS

       blocktube   [--display   host:display.screen]   [--visual   visual]   [--window]  [--root]
       [--window-id number] [--delay number] [--holdtime  number]  [--changetime  number]  [--no-
       texture] [--no-fog] [--wireframe] [--fps]

DESCRIPTION

       Blocktube draws a swirling, falling tunnel of reflective slabs. They fade from hue to hue.

OPTIONS

       --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.

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

       --root  Draw on the root window.

       --window-id number
               Draw on the specified window.

       --delay number
               Per-frame delay, in microseconds.  Default: 40000 (0.04 seconds.).

       --holdtime number
               How long to stay on the same color.  Default: 1000 frames.

       --changetime number
               How long it takes to fade to a new color.  Default: 200 frames.

       --no-texture
               Draw solid blocks intstead of reflective blocks.

       --no-fog
               Do not make blocks in the distance be darker.

       --wireframe
               Only draw outlines.

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

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  ©  2003 by Lars Damerow.  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.

AUTHOR

       Lars Damerow <lars@oddment.org>