Hello, I don't know anything about the data you want to visualize, but in case of isosurfaces of a scalar field you could get correct sorting via GPU Raycasting (a.k.a. volume rendering) if you manage to fit the scalar field into a 3D Texture on the graphics card.
Regards, Joachim Michele Bosi wrote: > Hello, > I need to sort the polygons of my meshes in order to obtain decent > transparencies for complex autointerstecting objects like 3d > isosurfaces. > I figured out that a very raw way to do so would be to subclass > Viewer, reimplement frame(), and from there getting the viewMatrix and > sorting my poligons based on their distance from the viewer (having > disabled display list support for the node). The actual sorting would > be done on the list of indices (osg::DrawElementsUInt) since I use > indexed triangles. > > Since to get correct results I also have to take into account the > transformation applied to my Geometry I was wondering if there was a > more "clever" way to do all this mess, maybe there are already > mechanisms that inform my Geometry that is going to be drawn so that I > can react sorting my polygons appropriately at the correct moment and > accounting for the currently active transformations, something similar > to the VTK/pipeline system. > Any idea? > Regards, > Mike > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- Joachim E. Vollrath University of Stuttgart Institute for Visualization and Interactive Systems (VIS) web: http://www.vis.uni-stuttgart.de/~vollrajm/ mail: [EMAIL PROTECTED] phone: 49.711.7816.403 fax: 49.711.7816.340 german postal address: Dipl. Inf. Joachim E. Vollrath Universitaet Stuttgart, Institutsverbund Informatik Institut fuer Visualisierung und Interaktive Systeme Universitaetstrasse 38 70569 Stuttgart GERMANY _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
