Hi Robert, It really depends on the model. With the dataset in the screenshots (which is the boston example from osgGIS), no, everything looks fine as long as I stay relatively close to the dataset. However, I have another dataset that we use that is a much larger geospatial extent, and it seems to only work as long as I am very close to the center of the bounding sphere of the dataset.
Perhaps for the large datasets there is a setting I could tweak to the number of cells or something to make the effect appear over the whole dataset. I notice that the osgprecipitation example has a --boundingBox option but it looks like it is never used. Thanks! Jason On Fri, Feb 27, 2009 at 11:54 AM, Robert Osfield <robert.osfi...@gmail.com>wrote: > Hi Jason, > > Curious.... > > My using your settings and zooming out a long long way I see the > artefact. It looks like the rendering cells are clamped to model. > This would normally be what you'd want - in a sim you don't normally > move outside the model. > > Are you seeing problems when moving around your model? > > Robert. > > > On Fri, Feb 27, 2009 at 4:36 PM, Jason Beverage <jasonbever...@gmail.com> > wrote: > > Hi Robert, > > > > I'm attaching a zip file showing some screenshots of what I'm seeing. I > > disabled lighting so that the terrain database would be more pronounced. > > This is running: > > osgprecipitation --fogColor 0 0 0 1 --particleColor 1 0 0 1 > --particleSize > > 0.1 terrain.ive. Terrain.ive is an osgdem generated UTM database. > > > > The 3 screenshots show me being very close to the terrain and then > zooming > > out. You can see in 1.jpg that the lower bottom half of the rain is cut > > off. In 2.jpg, I've added red lines to highlight the area where rain is > > appearing. As I move in and out, I can see "boxes" of rain appear and > > dissapear and finally if I zoom far enough away, the rain dissapears > > completely. > > > > I'm thinking there is a precision issue somewhere... > > > > Thanks! > > > > Jason > > > > On Fri, Feb 27, 2009 at 10:55 AM, Robert Osfield < > robert.osfi...@gmail.com> > > wrote: > >> > >> Hi Jason, > >> > >> I've just done tests on town models here at it's working fine. > >> > >> Could you take a screenshot of what your are seeing, perhaps it's a > driver > >> bug. > >> > >> Robert. > >> > >> On Fri, Feb 27, 2009 at 3:49 PM, Jason Beverage < > jasonbever...@gmail.com> > >> wrote: > >> > Hi Robert, > >> > > >> > I was using the scaled lz.osg as an example, the same behavior can be > >> > seen > >> > if you simply use the cow.osg. It rains very hard right around the > cow, > >> > but > >> > if you move the camera back far enough, the rain gets lighter and > >> > lighter > >> > and then finally stops completely. Is this the desired effect? > >> > > >> > My original tests were on a projected osgdem generated database. If I > >> > used > >> > a very small database, then the osgprecipitation effect worked well, > but > >> > loading a larger scene caused it to rain within a small region around > >> > the > >> > center of the bounding sphere. I'll keep looking and see if I can > come > >> > up > >> > with anything. > >> > > >> > Thanks, > >> > > >> > Jason > >> > > >> > > >> > On Thu, Feb 26, 2009 at 4:07 PM, Robert Osfield > >> > <robert.osfi...@gmail.com> > >> > wrote: > >> >> > >> >> Hi Jason, > >> >> > >> >> osgParticle::PrecipitationEffect is design to be effectively > infinite, > >> >> no matter how far you move it should repeat endlessly. I've done > lots > >> >> of testing on town sized models and it certainly works in this > context > >> >> fine. > >> >> > >> >> My guess is that your scaling of the scene has introduced issues that > >> >> the shader isn't able to cope with for some reason. Try loaded a > >> >> model that is of a 1:1 scale to see if it works fine. > >> >> > >> >> Robert. > >> >> > >> >> On Thu, Feb 26, 2009 at 7:29 PM, Jason Beverage > >> >> <jasonbever...@gmail.com> > >> >> wrote: > >> >> > Hi Robert, > >> >> > > >> >> > I'm playing around with the osgprecipitation example and noticed > that > >> >> > it > >> >> > doesn't work as I would expect for large models. > >> >> > > >> >> > For example, osgprecipitation lz.osg works fine, but > osgprecipitation > >> >> > lz.osg.100,100,100.scale doesn't show any rain unless you zoom in > >> >> > closely to > >> >> > 0,0,0. > >> >> > > >> >> > Is there a way to make the precipitation effect follow the camera > so > >> >> > that is > >> >> > always appears to be raining? > >> >> > > >> >> > I attempted to use the setPosition method of particle effect on > each > >> >> > frame > >> >> > to the eye point of the camera, but that didn't seem to do > anything. > >> >> > I > >> >> > also > >> >> > tried sticking the PrecipitationEffect under a MatrixTransform and > >> >> > translating the MatrixTransform to the eye point of the camera each > >> >> > frame > >> >> > and it didn't seem to work correctly either. It seemed like it > only > >> >> > respected the initial positioning and ignored all subsequent > >> >> > transforms. > >> >> > > >> >> > Thanks! > >> >> > > >> >> > Jason > >> >> > > >> >> > _______________________________________________ > >> >> > osg-users mailing list > >> >> > osg-users@lists.openscenegraph.org > >> >> > > >> >> > > >> >> > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > >> >> > > >> >> > > >> >> _______________________________________________ > >> >> osg-users mailing list > >> >> osg-users@lists.openscenegraph.org > >> >> > >> >> > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > >> > > >> > > >> > _______________________________________________ > >> > osg-users mailing list > >> > osg-users@lists.openscenegraph.org > >> > > >> > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > >> > > >> > > >> _______________________________________________ > >> osg-users mailing list > >> osg-users@lists.openscenegraph.org > >> > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > > > > _______________________________________________ > > osg-users mailing list > > osg-users@lists.openscenegraph.org > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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