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101 lines
2.7 KiB
C++
101 lines
2.7 KiB
C++
#include <meshing.hpp>
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namespace netgen
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{
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unique_ptr<Mesh> GetOpenElements( const Mesh & m, int dom = 0 )
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{
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static Timer t("GetOpenElements"); RegionTimer rt(t);
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auto mesh = make_unique<Mesh>();
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*mesh = m;
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Array<bool, PointIndex> interesting_points(mesh->GetNP());
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interesting_points = false;
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mesh->FindOpenElements(dom);
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NgArray<Element2d> openelements;
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openelements = mesh->OpenElements();
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for (auto & el : openelements)
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for (auto i : el.PNums())
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interesting_points[i] = true;
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for (auto & el : mesh->VolumeElements())
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{
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int num_interesting_points = 0;
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for (auto pi : el.PNums())
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if(interesting_points[pi])
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num_interesting_points++;
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if(num_interesting_points==0)
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el.Delete();
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el.SetIndex(num_interesting_points);
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}
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mesh->SetMaterial(1, "1_point");
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mesh->SetMaterial(2, "2_points");
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mesh->SetMaterial(3, "3_points");
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mesh->SetMaterial(4, "4_points");
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mesh->Compress();
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mesh->ClearSurfaceElements();
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for (auto & el : openelements)
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mesh->AddSurfaceElement( el );
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return mesh;
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}
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unique_ptr<Mesh> FilterMesh( const Mesh & m, FlatArray<PointIndex> points, FlatArray<SurfaceElementIndex> sels, FlatArray<ElementIndex> els )
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{
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static Timer t("GetOpenElements"); RegionTimer rt(t);
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auto mesh_ptr = make_unique<Mesh>();
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auto & mesh = *mesh_ptr;
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mesh = m;
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Array<bool, PointIndex> keep_point(mesh.GetNP());
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Array<bool, SurfaceElementIndex> keep_sel(mesh.GetNSE());
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Array<bool, ElementIndex> keep_el(mesh.GetNE());
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mesh.LineSegments().DeleteAll();
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keep_point = false;
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for(auto pi : points)
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keep_point[pi] = true;
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auto set_keep = [&] (auto & input, auto & keep_array, auto & els)
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{
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keep_array = false;
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for(auto ind : input)
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keep_array[ind] = true;
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for(auto ind : Range(els))
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{
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bool & keep = keep_array[ind];
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if(keep) continue;
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for(auto pi : mesh[ind].PNums())
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keep |= keep_point[pi];
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if(!keep)
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mesh[ind].Delete();
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}
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for(auto i = 0; i<els.Size(); i++)
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if(els[i].IsDeleted())
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{
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els.DeleteElement(i);
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i--;
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}
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};
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set_keep(sels, keep_sel, mesh.SurfaceElements());
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set_keep(els, keep_el, mesh.VolumeElements());
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//mesh.Compress();
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return mesh_ptr;
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}
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}
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