I have changed the VIEW_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY mode, but The overlay texture map disappear at some distance, I have not find the rule. I don't why.
在08-1-13，Glenn Waldron <[EMAIL PROTECTED]> 写道： > > Hi, > If you are using VIEW_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY mode, the > display resolution of the overlay texture will depend on how much of the > texture is seen. For example, if you are looking out towards the horizon, > the overlay will appear blockier because it must render a larger piece of it > within a finite texture size. Google Earth overlays behave the same way. > > You can adjust the texture size itself with > OverlayNode::setOverlayTextureSizeHint(). Try 2048 or 4096 if your video > card support it; it definitely helps -gw > > -- > Glenn Waldron : Pelican Mapping : http://pelicanmapping.com : 703-652-4791 > > On Jan 12, 2008 5:40 AM, 赵明伟 <[EMAIL PROTECTED]> wrote: > > > Hi, EveryOne. > > > > I am using the VPB and osgGIS. My step as follows: first use the > > image and dem file of a small region to generate terrain models by VPB , and > > then use the shp file to generate vector shape models, finally, in my > > application, I set the vector shape models' root as overlay to the terrain > > models' root. > > > > The final display effect has a problem that the generated texture of > > overlay cannot change it's resolution.So when I zoom in the viewer, the > > resampling effect is ugly. > > > > And there is anthoer question that I want the blend effect between > > overlay texture and the real terrain texture , but I can not find the > > interface in class osgSim::OverlayNode. If I don't use the OverlayNode and > > just blend the terrain models and the vector shape models, then the depth > > setting will be a question. > > > > I'm waiting your reply, Thanks. > > > > _______________________________________________ > > 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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