-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 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.

-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 screensize.

-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 landscape. 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.

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.

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).