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glforestfire(6)		      XScreenSaver manual	       glforestfire(6)

NAME
       glforestfire  -	draws a GL animation of sprinkling fire-like 3D trian‐
       gles

SYNOPSIS
       glforestfire [-display host:display.screen] [-window] [-root]  [-visual
       visual] [-delay microseconds] [-count number_of_particles] [-trees num‐
       ber_of_trees] [-size viewport_size] [-texture] [-no-texture] [-shadows]
       [-no-shadows]  [-fog]  [-no-fog] [-wireframe] [-no-wireframe] [-wander]
       [-no-wander] [-trackmouse] [-no-trackmouse] [-fps]

DESCRIPTION
       The glforestfire program draws an animation of sprinkling fire-like  3D
       triangles in a landscape filled with trees.

OPTIONS
       glforestfire accepts the following options:

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

       -root   Draw on the root window.

       -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.

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

       -trees number_of_trees
	       Specify how much trees are drawn in the landscape.

       -count number_of_particles
	       Specify	how much fire particles are drawn. A very special case
	       is 0 wich means that you get rain !

       -size viewport_size
	       Viewport of GL scene is specified size if greater than  32  and
	       less  than screensize. Default value is 0, meaning full screen‐
	       size.

       -texture
	       Show a textured ground and the trees. This is the default.

       -no-texture
	       Disables texturing the landscape. This implies  that  no	 trees
	       are drawn.

       -shadows
	       Show  a	shadow	for  each  particle on the ground. This is the
	       default.

       -no-shadows
	       Disables the drawing of the shadows.

       -fog    Show a fog in the distance.

       -no-fog Disables the fog. This is the default.

       -wander Move the observer around the landscape. This is the default.

       -no-wander
	       Keep the fire centered on the screen.

       -trackmouse
	       Let the mouse be a joystick to change the  view	of  the	 land‐
	       scape.  This implies -no-wander.

       -no-trackmouse
	       Disables mouse tracking. This is the default.

       -wire   Draw  a wireframe rendition of the fire: this will consist only
	       of single-pixel lines for the triangles.

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)

COPYRIGHT
       Copyright  ©  2001  by Eric Lassauge.  Permission to use, copy, modify,
       distribute, and sell this software and its documentation for  any  pur‐
       pose  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 repre‐
       sentations are made about the suitability of this software for any pur‐
       pose.  It is provided "as is" without express or implied warranty.

       The  original  code  for	 this  hack  was  written by David Bucciarelli
       (tech.hmw@plus.it) and could be found  in  the  demo  package  of  Mesa
       (Mesa-3.2/3Dfx/demos/).	This hack is the result of the merge of two of
       the David's demos (fire and rain).

AUTHOR
       David Bucciarelli <tech.hmw@plus.it> Eric Lassauge  <lassauge@mail.dot‐
       com.fr>

X Version 11		      5.07 (10-Aug-2008)	       glforestfire(6)
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