Hi Robert, On Mon, Dec 15, 2008 at 7:55 AM, Robert Osfield <[email protected]>wrote:
> Hi Fred & Jefferson, > > On Sun, Dec 14, 2008 at 10:49 AM, Frederic Bouvier <[email protected]> > wrote: > > I have a patch to PrecipitationEffect that seems to work. I'll submit it > > to osg-submissions > > I've just done a review of these changes and don't feel that there are > mostr straightforward and effecient way to implement what is > effectively near plan clipping. The code will make the vertex program > slower, and not cut down on rasteristation and fill load. > > I feel a better route would be to either: > > 1) use two Camera's to depth partition the scene as suggested earlier > in this thread, as this would give you control over the worlds depth > range where the precipitation exists This one works! > > > 2) Use an osg::ClipPlane to clip the precipitation effect. Using a > clip plan would also allow you to control angle of the clipping. I don't know how to use that (I'm a beginner). Fred, I would be grateful if you could share your code, if you do it. > > > Neither the above routes require any changes to the core OSG, and both > would not affect the vertex program load, and would clip out fragment > so would cut down the fragment program load so would be more efficient > than the submitted fix. > > Could you test out the above suggestions? > > Thanks, > Robert. > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > -- Jefferson Pinheiro (51) 9192 3535
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