Provided by: xscreensaver-gl-extra_5.07-0ubuntu3_i386 bug


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


        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]


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


        glforestfire accepts the following options:
        -window Draw on a newly-created window.  This is the default.
        -root   Draw on the root window.
                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
        -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‐
                Show a textured ground and the trees. This is the default.
                Disables texturing the landscape. This implies  that  no  trees
                are drawn.
                Show  a  shadow  for  each  particle on the ground. This is the
                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.
                Keep the fire centered on the screen.
                Let the mouse be a joystick to change the  view  of  the  land‐
                scape.  This implies -no-wander.
                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.


        DISPLAY to get the default host and display number.
                to get the name of a resource file that  overrides  the  global
                resources stored in the RESOURCE_MANAGER property.
        X(1), xscreensaver(1)


        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
        ( 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).


        David Bucciarelli <> Eric Lassauge  <‐>