I made a pull request related to this. If the PointLocatorTree doesn't find the element, I use a linear search over the mesh with Elem::close_to_point as a back-up. It works well for me. It's slower than the tree, of course, but it's only a back-up so seems fine to me. Also, we already had a linear search as a back-up in PointLocatorTree.
Let me know if it looks OK to you. David On 07/16/2014 05:43 PM, Derek Gaston wrote: > I would find a bit more fuzziness here to be useful myself.... > > > Derek > > > On Tue, Jul 15, 2014 at 8:53 PM, David Knezevic > <[email protected] <mailto:[email protected]>> wrote: > > > On 07/15/2014 10:51 PM, Roy Stogner wrote: > > > > On Tue, 15 Jul 2014, David Knezevic wrote: > > > >> I use MeshFunction a lot, it's very helpful. But sometimes due to > >> rounding error, I evaluate a MeshFunction at a point just > outside the > >> mesh, and hence the evaluation fails. > >> > >> I'd like to prevent this type of failure. > >> > >> I was thinking of perturbing the evaluation point in various > directions > >> (p + (delta,0,0), p + (0,delta,0), etc) until I find a point > that is > >> inside the mesh. This seems like it would work, but it's not very > >> elegant. I was wondering if anyone has any other ideas about > how to go > >> about this? > > > > We currently use Elem::contains_point() with default tolerance > in the > > point_locator in MeshFunction. Perhaps we could switch that to > > Elem::close_to_point(), add functionality to the point locators to > > allow increasing the tolerance, and expose that in the MeshFunction? > > That sounds very good to me. > > David > > > > ------------------------------------------------------------------------------ > Want fast and easy access to all the code in your enterprise? > Index and > search up to 200,000 lines of code with a free copy of Black Duck > Code Sight - the same software that powers the world's largest code > search on Ohloh, the Black Duck Open Hub! Try it now. > http://p.sf.net/sfu/bds > _______________________________________________ > Libmesh-users mailing list > [email protected] > <mailto:[email protected]> > https://lists.sourceforge.net/lists/listinfo/libmesh-users > > ------------------------------------------------------------------------------ Infragistics Professional Build stunning WinForms apps today! Reboot your WinForms applications with our WinForms controls. Build a bridge from your legacy apps to the future. http://pubads.g.doubleclick.net/gampad/clk?id=153845071&iu=/4140/ostg.clktrk _______________________________________________ Libmesh-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-users
