On 16 March 2012 09:17, Johan Hake <hake....@gmail.com> wrote: > Hello! > > I have implemented a new version of UnitSphere based on subdivision of an > initial octahedral surface mesh and tetrahedralization using the CGAL > framework. > > This is all fine, but CGAL uses alot of time tetrahedralizing the initial > surface mesh. CGAL is also doing some funny things with the surface mesh. > > 1) It subdivide the initial surface mesh, which I want to prevent. Is > that possible. > 2) 1) results in small triangles on the surface, but large triangles > in the interior. I set a tentative volume constraint based on the > size of a triangle of the input mesh. > > You can try it out here: > > bzr branch lp:~dolfin-core/dolfin/hake-trunk > > from dolfin import * > mesh = UnitSphereNew(4) > # Do not try larger subdivisions than 4, at least for now. >
Did you look at the CGAL demo for generating a mesh or a sphere: http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Mesh_3/Chapter_main.html#Subsection_50.3.1 ? It uses an implicit surface description. I has planning to add support for meshing geometries from implicit descriptions. Garth > > Johan > > _______________________________________________ > Mailing list: https://launchpad.net/~dolfin > Post to : dolfin@lists.launchpad.net > Unsubscribe : https://launchpad.net/~dolfin > More help : https://help.launchpad.net/ListHelp _______________________________________________ Mailing list: https://launchpad.net/~dolfin Post to : dolfin@lists.launchpad.net Unsubscribe : https://launchpad.net/~dolfin More help : https://help.launchpad.net/ListHelp
