> On 15/06/09 10:21 PM, Jehanzeb Hameed wrote: >> Hello, >> >> Is there a function I can hook into LocalMeshRefinement (or elsewhere) >> which allows me to define the rule for edge-bisection? This would be >> handy, e.g. if we knew our mesh was a sphere, then points on boundary >> can be pushed off differently so that they always lie on the sphere. >> >> > As far as I know Dolfin doesn't support any other description of solid > different than just Mesh. This means that there is no way to follow > shape of the boundary during refinement. > This would be nice to have such feature, but I can't imagine > implementing it without having advanced meshing core with support for > CSG or something similar. > > If you really need a smooth sphere, I would just change the code of > RivaraRefinement.cpp (see line 264, where new point is defined). For > sphere is quite simple, to predict where the point should be located. > > cheers > BArtek
The simplified cases of cylinders and spheres are available today in Unicorn: http://www.fenics.org/wiki/Unicorn We are currently developing the general case of projection of the mesh onto an exact geometry, where the exact geometry can be represented e.g. as a NURBS surface, which I expect will be in place after the summer. Also, different variants of local mesh refiement (such as the Rivara algorithm) is available today in Unicorn, including a distributed parallel version using MPI. For a continuing discussion on Unicorn, there is a dedicated mailing list: unicorn-...@fenics.org All the best, Johan _______________________________________________ DOLFIN-dev mailing list DOLFIN-dev@fenics.org http://www.fenics.org/mailman/listinfo/dolfin-dev
