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90 lines
2.6 KiB
C++
90 lines
2.6 KiB
C++
#ifndef NETGEN_BOUNDARYLAYER_HPP
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#define NETGEN_BOUNDARYLAYER_HPP
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namespace netgen
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{
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///
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DLL_HEADER extern void InsertVirtualBoundaryLayer (Mesh & mesh);
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/// Create a typical prismatic boundary layer on the given
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/// surfaces
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class BoundaryLayerParameters
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{
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public:
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// parameters by Philippose ..
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Array<int> surfid;
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Array<double> heights;
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map<string, string> new_mat;
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BitArray domains;
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bool outside = false; // set the boundary layer on the outside
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bool grow_edges = false;
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bool limit_growth_vectors = true;
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double limit_safety = 0.3; // alloow only 30% of the growth vector length
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bool sides_keep_surfaceindex = false;
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Array<size_t> project_boundaries;
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};
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DLL_HEADER void GenerateBoundaryLayer (Mesh & mesh,
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const BoundaryLayerParameters & blp);
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DLL_HEADER int /* new_domain_number */ GenerateBoundaryLayer2 (Mesh & mesh, int domain, const Array<double> & thicknesses, bool should_make_new_domain=true, const Array<int> & boundaries=Array<int>{});
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class BoundaryLayerTool
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{
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public:
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BoundaryLayerTool(Mesh & mesh_, const BoundaryLayerParameters & params_);
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void Perform();
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protected:
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Mesh & mesh;
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MeshTopology & topo;
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BoundaryLayerParameters params;
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Array<Vec<3>, PointIndex> growthvectors;
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Table<SurfaceElementIndex, PointIndex> p2sel;
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BitArray domains, is_edge_moved, is_boundary_projected, is_boundary_moved;
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Array<SegmentIndex> moved_segs;
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int max_edge_nr, nfd_old, ndom_old;
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Array<int> new_mat_nrs;
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BitArray moved_surfaces;
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int np, nseg, nse, ne;
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double height;
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bool have_single_segments;
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Array<Segment> segments, new_segments;
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Array<double> surfacefacs;
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Array<int> si_map;
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Array<double, PointIndex> limits;
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// major steps called in Perform()
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void CreateNewFaceDescriptors();
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void CreateFaceDescriptorsSides();
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void CalculateGrowthVectors();
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Array<Array<pair<SegmentIndex, int>>, SegmentIndex> BuildSegMap();
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BitArray ProjectGrowthVectorsOnSurface();
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void InterpolateSurfaceGrowthVectors();
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void InterpolateGrowthVectors();
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void LimitGrowthVectorLengths();
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void InsertNewElements(FlatArray<Array<pair<SegmentIndex, int>>, SegmentIndex> segmap, const BitArray & in_surface_direction);
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void SetDomInOut();
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void SetDomInOutSides();
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void AddSegments();
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void FixVolumeElements();
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Vec<3> getNormal(const Element2d & el)
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{
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auto v0 = mesh[el[0]];
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return Cross(mesh[el[1]]-v0, mesh[el[2]]-v0).Normalize();
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}
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Vec<3> getEdgeTangent(PointIndex pi, int edgenr);
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};
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} // namespace netgen
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#endif // NETGEN_BOUNDARYLAYER_HPP
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