[Dune-devel] dune-uggrid: complete rule set for green closures of tetrahedral meshes enabled by default

[Ansgar Burchardt]

On Thu, 2019-07-11 at 11:01 +0200, Oliver Sander wrote:
> This should fix
> 
>   https://gitlab.dune-project.org/core/dune-grid/issues/27
> 
> can you please verify this?

I ran uggrid-failure.cc from [1] (sequentially), the output was as
follows:

With DUNE_UGGRID_TET_RULESET=OFF (old default):

+---
| Number of codim-0 entities: 518
| Number of codim-1 entities: 1160
| Number of codim-2 entities: 805
| Number of codim-3 entities: 163
| edges 249 and 182 have nontrivial intersection
|   edge_249 : 0.75000 0.00000 0.00000     0.75000 0.12500 0.12500
|   edge_182 : 0.75000 0.00000 0.12500     0.75000 0.25000 0.00000
|   | 0.66667 * edge_249 - 0.33333 * edge_182 | = 0.00000
+---

With the change to DUNE_UGGRID_TET_RULESET=ON:

+---
| Number of codim-0 entities: 506
| Number of codim-1 entities: 1136
| Number of codim-2 entities: 790
| Number of codim-3 entities: 161
+---

So at least the test program seems to be happy now.

Ansgar

  [1] https://gitlab.dune-project.org/core/dune-grid/issues/27#note_22100
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