Provided by: xscreensaver-gl-extra_4.23-4ubuntu8_i386
glforestfire - draws a GL animation of sprinkling fire-like 3D
glforestfire [-display host:display.screen] [-window] [-root] [-visual
visual] [-delay microseconds] [-count number_of_particles] [-trees
number_of_trees] [-size viewport_size] [-texture] [-no-texture]
[-shadows] [-no-shadows] [-fog] [-no-fog] [-wireframe] [-no-wireframe]
[-wander] [-no-wander] [-trackmouse] [-no-trackmouse] [-fps] [-no-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.
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 a running tally of how many frames per second are being
rendered. In conjunction with -delay 0, this can be a useful
benchmark of your GL performance.
Specify how much trees are drawn in the landscape.
Specify how much fire particles are drawn. A very special case
is 0 wich means that you get rain !
Viewport of GL scene is specified size if greater than 32 and
less than screensize. Default value is 0, meaning full
Show a textured ground and the trees. This is the default.
Disables texturing the landscape. This implies that no trees
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
landscape. 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.
Copyright © 2001 by Eric Lassauge. 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
The original code for this hack was written by David Bucciarelli
(email@example.com) 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 <firstname.lastname@example.org> Eric Lassauge