Re: [deal.II] Re: Problem with parallelization when using hyper_cube_slit

Roberto, you are setting boundary ids only for locally owned cells. I assume this means your constraint matrix will be inconsistent because of that. Can you check what happens if you use the correct boundary indices on all processors? On Fri, Apr 13, 2018 at 1:42 PM, Roberto Porcù wrote: > Dea

[deal.II] algorithm of finding cell in a mesh by a point

Hi, I checked the asymptotic complexity of algorithm GridTool::find_active_cell_around_point and found that it is O(N), where N is the number of cells in a mesh. Is it too slow? I heard about algorithms that produce mean asymptotic O(log(N)) or at least O(square root (N)) Regards, Ilya -- T

[deal.II] deal.II Newsletter #28

Hello everyone! This is deal.II newsletter #28. It automatically reports recently merged features and discussions about the deal.II finite element library. ## Below you find a list of recently proposed or merged features: #6251: Change GridTools::distributed_compute_ptloc to use global descrip

[deal.II] Re: algorithm of finding cell in a mesh by a point

Ilya On Monday, April 16, 2018 at 11:53:20 AM UTC-4, Bryukhanov Ilya wrote: > > I heard about algorithms that produce mean asymptotic O(log(N)) or at > least O(square root (N)) > To do that you need to first build a tree and then search in it. This is not what is done the current function but if

Re: [deal.II] interpolating boundary values from a previously found FE solution

On 04/15/2018 07:34 PM, Jaekwang Kim wrote: Is there any example tutorial related to the first approach? _/"You can build a ConstraintMatrix object that sets boundary DoFs of V to the corresponding values of U. This should be easy to do." /_ None that I would know of, but you build constra

[deal.II] Re: Mesh generation issue

Hi Peng I've written something to generate sphere based on the documentation, which generates not as perfect, but usable mesh (see attached). If you are interested, click this . Best Jie -- The deal.II project is lo