Am Samstag, den 01.09.2007, 13:38 -0500 schrieb Curtis Olson: > On 9/1/07, Detlef Faber wrote: > Hello everybody, > > I've been playing around with OSGs Particle Systems and found > this might > be suitable to create some 3d clouds. But see yourself: > > http://www.sol2500.net/flightgear/ksfo-under-clouds.jpg > http://www.sol2500.net/flightgear/cloudfront.jpg > http://www.sol2500.net/flightgear/clouds-over-ksfo.jpg > http://www.sol2500.net/flightgear/bushfire.jpg > > Here is a zip containing the files. > http://www.sol2500.net/flightgear/ParticleSys.tar.gz > > Put it in /Models/ and use the ufo to place them. > clouds.xml creates a 20x20 km big cloud field. > > Sometimes particle systems do not work at once. They cannot > (yet) be > placed as static objects in the scenery. Finally they get > clipped by the > Cloud Layer, so be sure to switch off any clouds. > > Perhaps someone with knowlage of the weather system has an > idea how to > use these. > > I'm only able to look at the still shots this afternoon, but the one > thing I wonder about with a partical system versus an imposter system > is how would the particles look as you move? Do you get a sense of 3d > or will things look a bit strange if the texture is always turning and > facing the camera? Perhaps it will look good, but that is the first > thing I'd look for.
The particles are basically round shaped and have little contrast, so the movement isn't really disturbing. Flyinf through the cloud layer looks authentic to me. I am still experimenting to find the best balance between number and size of particles. > But maybe this system would work well for certain types of cloud > layers? From the static screen shots it certainly looks promising. Scattered to broken looks good, but the number of particles drops the framerate. It is possible to create growing cumulus clouds (as indicator of thermals) too. > Ground fires + water bombing would be a cool thing .... if we could > put the forest fire into the MP system some how so that we could work > cooperatively to put out fires, that would be another nifty > thing. :-) I like to make the fires extingushable too, but before that I need to figure out how to create falling water (with particles of course). > > Regards, > > Curt. > > -- > Curtis Olson - University of Minnesota - FlightGear Project > http://baron.flightgear.org/~curt/ http://www.humanfirst.umn.edu/ > http://www.flightgear.org > Unique text: 2f585eeea02e2c79d7b1d8c4963bae2d > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ Flightgear-devel mailing list > Flightgear-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/flightgear-devel ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
