Hi Tomas, The osgUtul::Simplifier is for surfaces so will probably produce pretty unreliable results on tetrahedral mesh.
I haven't come across algorithms for simplifing tetrahedral meshes so you an rather out on your own. I'd recommend creating efficient meshes at source when you build the triangle mesh from the tetrahedrons. If you are going to simplify then do so on the tertrahedral mesh to begin with, then generate the trianglular mesh. If you bill a boundary surface from the tetrahedral mesh then could be used with the osgUtil::Simplifier. Robert. On 2/26/07, Tomas Hnilica <[EMAIL PROTECTED]> wrote:
Hi all, Hello all OSG users, I have a question about rendering optimization of meshes. I know that it is maybe not directly related to scenegraphs, but perhaps there will be some extensions that deal with it. Suppose I have a model created from tetrahedrons (or any other 3d objects) that are connected to each other and make volumes. I would like to simplify such models for faster rendering with preserved topology - I need to be able to select, pick parts of it. I found some algorithms called "triangle mesh decimation" (Schroeder) and "progressive meshes" (Hoppe) that simplify the mesh - but also change it's topology. This would be probably useful with using LOD, but for interactive work (selecting, picking) some other structures (original ones) would have to be paralelly used....is it common to use simplified structure for rendering and original one for other stuff?? Are such algorithms implemented? Are there any implemented, that do not change the topology? When thinking about volumes made from tetrahedrons it is clear that there is a lot of triangles (i think about tetrahedron like 4 triangles), that are inside others (occlusion culling?), many are duplicated (2 tetrahedrons connected by 1 surface - triangle), etc.. Is there any plugin that goes through geometry and removes such triangles? (Simplifier?) Do you have any experience and suggestions to this topic? Many thanks in advance, Tomas Hnilica _______________________________________________ osg-users mailing list osg-users@openscenegraph.net http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/
_______________________________________________ osg-users mailing list osg-users@openscenegraph.net http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/
