On 28 February 2017 at 12:04, Johny Canes <[email protected]> wrote: > Hi, > > Mh Robert, it seems glTexSubImage2D is the most straightforward. I don't want > to build an abstraction around one simple operation. > > There's a couple of things now. Can I or may I manually bind using > Code: > texture->getTextureObject( cid )->bind(); > > or alternatively, directly with > Code: > glBindTexture( GL_TEXTURE_2D, tid ); > > ?
You should see the same result, the bind() call will just be doing a glBindTexture call itself. Going dig into the source code to see what it's doing. The advantage of using TextureObject is that you can leverage the OSG's ability to recycle textures objects and have them cleaned up reliably. Recyling texture objects is really important when doing paged scenes as creating and destroying GL objects is very expensive relative to just subloading data. The OSG does this automatically for you. In your case you want to do subloading of portion of an image which steps beyond what the core OSG provides, but texture objects and reuse might still be important. Robert. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
