Hi, Maybe just use setVertexArray with the primary vertex list, and you use the second list in a osg::DrawElementsUInt (or similar). In the DrawElementsUInt, you push your vertices indexes. So when the vertices data are modified, if they keep the same position in the list the geometry will update. (do not forget setUserData(DYNAMIC) )
There is a setVertexIndice() method but it is now deprecated... maybe something can replace it. Same thing for the texture (if I understand well) Hope this help. PS : have a look on documentation http://www.openscenegraph.org/documentation/OpenSceneGraphReferenceDocs/a01369.html#4596d0e18fb5217a1306c324a2eaba72 Regards, Vincent. 2009/1/14 Sewell, Kenneth R Civ USAF AFMC AFRL/RYZW < [email protected]> > Is it possible to specify a vertex list by indexing into a different > vertex list? Sorry if that's confusing, I'll try to explain a bit more. > > I've got some data that is organized in the following way: > > - A primary vertex list that is the regular xyz values you'd expect. > > - A secondary vertex list that is composed by indexing into the primary > vertex list. > > - A texture coordinate list that has a value for each 'vertex' in the > secondary list. > > - Lastly, a list of indices into the secondary vertex list to define > some primitives. > > It looks like the data was set up this way so a vertex that exists in > multiple primitives can have a unique texture coordinate per primitive, > yet still only be transformed once. > > My initial approach was just to construct the secondary list by > replacing the index with a copy of the vertex it was referencing. This > works except for one thing, the primary vertex list is not static. By > that, I mean the values of the vertices themselves, the list size itself > will not change. So, the only approach I see is to basically > reconstruct the secondary vertex list every time the primary is updated. > This could be kind of rough, since I could potentially have many > secondary lists. From what I've seen looking through OSG headers and > mailing list postings it doesn't seem possible to do this 'vertex list > by indexing another', but I thought I'd ask just in case. > Thanks. > > - Ken. > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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