Hi David, The answers 2 and 3 are the ones for which I am looking for. Thanks for the detailed answers. And additionally there is nothing wrong with your answers :). Probably I asked the question in a wrong way. Thanks again... Best Regards, Ugras
________________________________ From: David Spilling <[email protected]> To: OpenSceneGraph Users <[email protected]> Sent: Tuesday, September 29, 2009 12:28:47 PM Subject: Re: [osg-users] OSG_FEM Hi Ugras, What you ask is slightly strange, and I apologies if this reply appears too patronising - it isn't meant to be! OSG is basically a rendering package; it just draws things. To try to interpret your question sensibly: 1) Can OSG import FEM meshes? I imagine that if your mesher can export the mesh definition in a manner in which OSG can read it (i.e. in one of the many graphics formats that OSG supports) then you can display the mesh. However note that all OSG formats are shells, not solids. Solid nodes, in the FE sense, don't really exist in graphics land. 2) Can OSG generate meshes? There are a number of utilities within OSG that might give you a starting point for getting OSG to mesh objects (given the surface issue limitations described above); for example, the delauneytriangulator, or the tesselator, or the optimiser. However, I am not aware of any OSG plugins that perform meshing based on FEM rules. Similarly, OSG doesn't natively know about constraints, or connectivity, between surfaces, unless it has somehow been built into the scenegraph. 3) Can OSG perform numerical analysis? This, again, is something you would have to develop. OSG provides a simple library of vector/matrix operations, but decomposition and optimisation are not in the current methods. I would also suggest that, rather than extend OSG to cover these operations, you use freely available external high performance libraries to do this, e.g. linpack/blas etc. 4) Can OSG display FEM results (e.g. mode shapes) Well, OSG can display anything you like, but the trick, again, would be to find some mutual compatible format. For example, you could use OSG to animate a model's vertices such that it shows the eigenfrequencies like a movie, but most of this would be programmatic, I imagine. I hope that helps. David
_______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
