Hi Harold, yes, my light source is the "sun". No other lights in the scene yet. And the results are not good. I will do research on the "cascade shadowmaps" and will try to implement it. Thanks for the hint
Nick http://www.linkedin.com/in/tnikolov Sent from Gümüşsuyu, İstanbul, Turkey On Wed, Dec 9, 2009 at 11:13 AM, Harold Comere <[email protected]>wrote: > Hi Nike, >> > > There is many way to get shadows and the shadowing technique choice shall > depend of your scene data. > > The two basic shadowing techniques are : > - shadow maps ( image based ) > - shadow volumes ( geometry based ) > > Shadow maps are very cheap and easy to implement but will works good only > if your light is not far from what you are shadowing due to the image > approach. So if you have a large terrain with an unique directional light ( > as sun ), simple shadowmaps should do an ugly result. > You could try "cascade shadowmaps" which is a technique used a lot in video > games. It uses a kind of shadowmap LOD to avoid image based algorithms > issues and stay cheap. > > Shadow volumes generate very accurate shadows but as it is based on > geometry, if your scene geometry is complex you will experience some perf > issues. > > Again, the shadowing technique choice depends of how many lights you have, > where they are, what you are shadowing etc. > Give a bit more details of your goal and i'm sure some osg pro will bring > to you the ideal solution using osg :) > > Regards, > Harold > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > >
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