= AtmosphericEngine =

== Overview ==
The atmospheric engine is an engine to create and control weather effects in the orxonox worlds in an easy way.[[br]]
Various atmospheric effects like rain, snow, fog etc. can be activated by simple functions.
[[TOC]]

== UML - Design ==
UML-Classdiagram
{{{
#!html
<a href="https://www.orxonox.net/cgi-bin/trac.cgi/attachment/wiki/AtmosphericEngine/AtmosphericEngine.png?format=raw">
<img src="https://www.orxonox.net/cgi-bin/trac.cgi/attachment/wiki/AtmosphericEngine/AtmosphericEngine.png?format=raw" width=300></a>
}}}

== Modules ==

=== VolFogEffect ===
Volumetric Fog - new idea: create animated fog with shaders. same as the animated clouds. [[br]]
Example:
{{{
#!html
<a href="https://www.orxonox.net/cgi-bin/trac.cgi/attachment/wiki/AtmosphericEngine/fog1.jpg?format=raw">
<img src="https://www.orxonox.net/cgi-bin/trac.cgi/attachment/wiki/AtmosphericEngine/fog1.jpg?format=raw" width=300></a>

<a href="https://www.orxonox.net/cgi-bin/trac.cgi/attachment/wiki/AtmosphericEngine/fog2.jpg?format=raw">
<img src="https://www.orxonox.net/cgi-bin/trac.cgi/attachment/wiki/AtmosphericEngine/fog2.jpg?format=raw" width=300></a>
}}}

Other Links:
 * [http://www.xs4all.nl/~ath8n0r/div/ Volumetric Fog] - code and a little prosa
 * [http://glazsd.tripod.com/proj/volfog/ Volumetric Fog] - less docu, just code.
 * [http://www.apgsoftware.co.uk/gl/demos.html] - some more code


== Varia Examples ==
 * [http://www.gamedev.net/community/forums/topic.asp?topic_id=354442 Dynamic Sky System][[br]]
 * [http://www.vterrain.org/Atmosphere/rain.html rain, fog, lighting, and snow]

Terrain Lighting:
 * [http://www.cs.utah.edu/vissim/papers/sunsky/ light and daytime] - much about this topic with lots of images and source, actualy too heavy...
 * [http://www.vterrain.org/Atmosphere/index.html sky and atmosphere rendering]

== Programmers ==
[http://hdavid@ee.ethz.ch David Hasenfratz][[br]]
[http://amaechler@ee.ethz.ch Andreas Maechler][[br]]