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rewrite create boundarylayer function (now more efficient and stable
and easier)
This commit is contained in:
Christopher Lackner
parent
0d48924392
commit
609cbbcadf
@ -88,167 +88,175 @@ namespace netgen
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cout << "Quads: " << nq << endl;
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}
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/*
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Philippose Rajan - 11 June 2009
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Function to calculate the surface normal at a given
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vertex of a surface element, with respect to that
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surface element.
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This function is used by the boundary layer generation
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function, in order to calculate the effective direction
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in which the prismatic layer should grow
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*/
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inline Vec<3> GetSurfaceNormal(Mesh & mesh, const Element2d & el)
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{
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auto v0 = mesh[el[0]];
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auto v1 = mesh[el[1]];
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auto v2 = mesh[el[2]];
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Vec<3> vec1 = v1-v0;
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Vec<3> vec2 = v2-v0;
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Vec<3> normal = Cross(vec1, vec2);
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normal.Normalize();
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return normal;
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}
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/*
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Philippose Rajan - 11 June 2009
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modified by Christopher Lackner Apr 2020
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Added an initial experimental function for
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generating prismatic boundary layers on
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a given set of surfaces.
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The number of layers, height of the first layer
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and the growth / shrink factor can be specified
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by the user
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Currently, the layer height is calculated using:
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height = h_first_layer * (growth_factor^(num_layers - 1))
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*/
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void GenerateBoundaryLayer(Mesh& mesh, const BoundaryLayerParameters& blp)
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{
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PrintMessage(1, "Generating boundary layer...");
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PrintMessage(3, "Old NP: ", mesh.GetNP());
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PrintMessage(3, "Old NSE: ",mesh.GetNSE());
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map<tuple<int, int, int>, int> domains_to_surf_index;
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map<tuple<PointIndex, PointIndex>, int> pi_to_edgenr;
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map<int, int> last_layer_surface_index_map;
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int max_surface_index = mesh.GetNFD();
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int max_edge_nr = -1;
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for(const auto& seg : mesh.LineSegments())
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if(seg.edgenr > max_edge_nr)
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max_edge_nr = seg.edgenr;
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for(int layer = blp.heights.Size(); layer >= 1; layer--)
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{
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PrintMessage(3, "Generating layer: ", layer);
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int new_mat_nr = mesh.GetNDomains() +1;
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mesh.SetMaterial(new_mat_nr, blp.new_mat);
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auto map_surface_index = [&](auto si)
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{
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if(last_layer_surface_index_map.find(si) == last_layer_surface_index_map.end())
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{
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last_layer_surface_index_map[si] = ++max_surface_index;
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auto& old_fd = mesh.GetFaceDescriptor(si);
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int domout = blp.outside ? old_fd.DomainOut() : blp.new_matnrs[layer-1];
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int domin = blp.outside ? blp.new_matnrs[layer-1] : old_fd.DomainIn();
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// -1 surf nr is so that curving does not do anything
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FaceDescriptor fd(-1,
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domin, domout, -1);
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fd.SetBCProperty(max_surface_index);
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mesh.AddFaceDescriptor(fd);
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mesh.SetBCName(max_surface_index-1,
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"mapped_" + old_fd.GetBCName());
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return max_surface_index;
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}
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return last_layer_surface_index_map[si];
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};
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auto domains = blp.domains;
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if(!blp.outside)
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domains.Invert();
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mesh.UpdateTopology();
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auto& meshtopo = mesh.GetTopology();
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auto layerht = blp.heights[layer-1];
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PrintMessage(5, "Layer Height = ", layerht);
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// Need to store the old number of points and
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// surface elements because there are new points and
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// surface elements being added during the process
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int np = mesh.GetNP();
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int nse = mesh.GetNSE();
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int ne = mesh.GetNE();
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// Safety measure to ensure no issues with mesh
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// consistency
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int nse = mesh.GetNSE();
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int nseg = mesh.GetNSeg();
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// Indicate which points need to be remapped
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BitArray bndnodes(np+1); // big enough for 1-based array
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Array<Array<PointIndex>, PointIndex> mapto(np);
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// Map of the old points to the new points
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Array<PointIndex, PointIndex> mapto(np);
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// Growth vectors for the prismatic layer based on
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// the effective surface normal at a given point
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Array<Vec<3>, PointIndex> growthvectors(np);
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growthvectors = 0.;
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// Bit array to identify all the points belonging
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// to the surface of interest
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bndnodes.Clear();
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Array<double> surfacefacs(mesh.GetNFD()+1);
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surfacefacs = 0.;
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// Run through all the surface elements and mark the points
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// belonging to those where a boundary layer has to be created.
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// In addition, also calculate the effective surface normal
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// vectors at each of those points to determine the mesh motion
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// direction
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PrintMessage(3, "Marking points for remapping...");
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for(const auto& sel : mesh.SurfaceElements())
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if (blp.surfid.Contains(sel.GetIndex()))
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auto getSurfaceNormal = [&mesh] (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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// surface index map
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Array<int> si_map(mesh.GetNFD()+1);
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si_map = -1;
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int fd_old = mesh.GetNFD();
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// create new FaceDescriptors
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for(auto i : Range(1, fd_old+1))
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{
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auto& fd = mesh.GetFaceDescriptor(i);
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if(blp.surfid.Contains(i))
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{
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if(auto isIn = domains.Test(fd.DomainIn()); isIn != domains.Test(fd.DomainOut()))
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{
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int new_si = mesh.GetNFD()+1;
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surfacefacs[i] = isIn ? 1. : -1.;
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// -1 surf nr is so that curving does not do anything
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FaceDescriptor new_fd(-1, isIn ? new_mat_nr : fd.DomainIn(),
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isIn ? fd.DomainOut() : new_mat_nr, -1);
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new_fd.SetBCProperty(new_si);
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mesh.AddFaceDescriptor(new_fd);
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si_map[i] = new_si;
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mesh.SetBCName(new_si-1, "mapped_" + fd.GetBCName());
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}
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}
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}
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// mark points for remapping
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for(const auto& sel : mesh.SurfaceElements())
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{
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auto n = surfacefacs[sel.GetIndex()] * getSurfaceNormal(sel);
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if(n.Length2() != 0.)
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{
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auto n2 = GetSurfaceNormal(mesh,sel);
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auto& fd = mesh.GetFaceDescriptor(sel.GetIndex());
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auto domin = fd.DomainIn();
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auto domout = fd.DomainOut();
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if(blp.domains.Test(domout) && !blp.domains.Test(domin))
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n2 *= -1;
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if(!blp.outside)
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n2 *= -1;
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for(auto pi : sel.PNums())
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{
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// Set the bitarray to indicate that the
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// point is part of the required set
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bndnodes.SetBit(pi);
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// Add the surface normal to the already existent one
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// (This gives the effective normal direction at corners
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// and curved areas)
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auto& n1 = growthvectors[pi];
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if(n1.Length() == 0) { n1 = n2; continue; }
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auto n1n2 = n1 * n2;
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auto n1n1 = n1 * n1;
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auto n2n2 = n2 * n2;
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if(n2n2 - n1n2*n1n2/n1n1 == 0) { n1 = n2; continue; }
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n1 += (n2n2 - n1n2)/(n2n2 - n1n2*n1n2/n1n1) * (n2 - n1n2/n1n1 * n1);
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auto & np = growthvectors[pi];
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if(np.Length() == 0) { np = n; continue; }
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auto npn = np * n;
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auto npnp = np * np;
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auto nn = n * n;
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if(nn-npn*npn/npnp == 0) { np = n; continue; }
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np += (nn - npn)/(nn - npn*npn/npnp) * (n - npn/npnp * np);
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}
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}
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}
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// Bit array to keep track of segments already processed
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BitArray segs_done(nseg);
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segs_done.Clear();
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// map for all segments with same points
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// points to pair of SegmentIndex, int
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// int is type of other segment, either:
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// 0 == adjacent surface grows layer
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// 1 == adjacent surface doesn't grow layer, but layer ends on it
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// 2 == adjacent surface is interior surface that ends on layer
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// 3 == adjacent surface is exterior surface that ends on layer (not allowed yet)
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Array<Array<pair<SegmentIndex, int>>, SegmentIndex> segmap(mesh.GetNSeg());
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// moved segments
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Array<SegmentIndex> moved_segs;
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// boundaries to project endings to
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BitArray project_boundaries(fd_old+1);
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BitArray move_boundaries(fd_old+1);
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project_boundaries.Clear();
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move_boundaries.Clear();
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Array<SurfaceElementIndex, SegmentIndex> seg2surfel(mesh.GetNSeg());
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for(auto si : Range(mesh.SurfaceElements()))
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{
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NgArray<int> surfeledges;
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meshtopo.GetSurfaceElementEdges(si+1, surfeledges);
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for(auto edgenr : surfeledges)
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for(auto sei : Range(mesh.LineSegments()))
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if(meshtopo.GetEdge(sei)+1 == edgenr &&
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mesh[sei].si == mesh[si].GetIndex())
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seg2surfel[sei] = si;
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}
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for(auto si : Range(mesh.LineSegments()))
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{
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if(segs_done[si]) continue;
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const auto& segi = mesh[si];
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if(si_map[segi.si] == -1) continue;
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segs_done.SetBit(si);
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segmap[si].Append(make_pair(si, 0));
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moved_segs.Append(si);
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for(auto sj : Range(mesh.LineSegments()))
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{
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if(segs_done.Test(sj)) continue;
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const auto& segj = mesh[sj];
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if((segi[0] == segj[0] && segi[1] == segj[1]) ||
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(segi[0] == segj[1] && segi[1] == segj[0]))
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{
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segs_done.SetBit(sj);
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int type;
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if(si_map[segj.si] != -1)
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type = 0;
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else if(const auto& fd = mesh.GetFaceDescriptor(segj.si); domains.Test(fd.DomainIn()) && domains.Test(fd.DomainOut()))
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{
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type = 2;
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if(fd.DomainIn() == 0 || fd.DomainOut() == 0)
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project_boundaries.SetBit(segj.si);
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}
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else if(const auto& fd = mesh.GetFaceDescriptor(segj.si); !domains.Test(fd.DomainIn()) && !domains.Test(fd.DomainOut()))
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{
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type = 3;
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if(fd.DomainIn() == 0 || fd.DomainOut() == 0)
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project_boundaries.SetBit(segj.si);
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move_boundaries.SetBit(segj.si);
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}
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else
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{
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type = 1;
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// in case 1 we project the growthvector onto the surface
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project_boundaries.SetBit(segj.si);
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}
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segmap[si].Append(make_pair(sj, type));
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}
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}
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}
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BitArray in_surface_direction(fd_old+1);
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in_surface_direction.Clear();
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// project growthvector on surface for inner angles
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for(const auto& sel : mesh.SurfaceElements())
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// if(!blp.surfid.Contains(sel.GetIndex()))
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// {
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if(blp.project_boundaries.Contains(sel.GetIndex()))
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if(blp.grow_edges)
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{
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auto n = GetSurfaceNormal(mesh, sel);
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for(const auto& sel : mesh.SurfaceElements())
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if(project_boundaries.Test(sel.GetIndex()))
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{
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auto n = getSurfaceNormal(sel);
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for(auto i : Range(sel.PNums()))
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{
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auto pi = sel.PNums()[i];
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@ -260,491 +268,205 @@ namespace netgen
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auto v2 = (mesh[prev] - mesh[pi]).Normalize();
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auto v3 = growthvectors[pi];
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v3.Normalize();
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// only project if sel goes in boundarylayer direction
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if((v1 * v3 < 1e-12) || (v2 * v3 < 1e-12))
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continue;
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if((v1 * v3 > 1e-12) || (v2 * v3 > 1e-12))
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in_surface_direction.SetBit(sel.GetIndex());
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auto& g = growthvectors[pi];
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auto ng = n * g;
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auto gg = g * g;
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auto nn = n * n;
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if(fabs(ng*ng-nn*gg) < 1e-12 || fabs(ng) < 1e-12) continue;
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// if(fabs(ng*ng-nn*gg) < 1e-12 || fabs(ng) < 1e-12) continue;
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auto a = -ng*ng/(ng*ng-nn * gg);
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auto b = ng*gg/(ng*ng-nn*gg);
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g += a*g + b*n;
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}
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}
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if (!blp.grow_edges)
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}
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else
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{
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for(const auto& sel : mesh.LineSegments())
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for(const auto& seg : mesh.LineSegments())
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{
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int count = 0;
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for(const auto& sel2 : mesh.LineSegments())
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if(((sel[0] == sel2[0] && sel[1] == sel2[1]) || (sel[0] == sel2[1] && sel[1] == sel2[0])) && blp.surfid.Contains(sel2.si))
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for(const auto& seg2 : mesh.LineSegments())
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if(((seg[0] == seg2[0] && seg[1] == seg2[1]) || (seg[0] == seg2[1] && seg[1] == seg2[0])) && blp.surfid.Contains(seg2.si))
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count++;
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if(count == 1)
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{
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bndnodes.Clear(sel[0]);
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bndnodes.Clear(sel[1]);
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growthvectors[seg[0]] = {0., 0., 0.};
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growthvectors[seg[1]] = {0., 0., 0.};
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}
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}
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}
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// Add additional points into the mesh structure in order to
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// clone the surface elements.
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// Also invert the growth vectors so that they point inwards,
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// and normalize them
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PrintMessage(3, "Cloning points and calculating growth vectors...");
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// insert new points
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for (PointIndex pi = 1; pi <= np; pi++)
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if (growthvectors[pi].Length2() != 0)
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{
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if (bndnodes.Test(pi))
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mapto[pi] = mesh.AddPoint(mesh[pi]);
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else
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mapto[pi].Invalidate();
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}
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// Add quad surface elements at edges for surfaces which
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// don't have boundary layers
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// Bit array to keep track of segments already processed
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BitArray segsel(nseg);
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// Set them all to "1" to initially activate all segments
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segsel.Set();
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// remove double segments (if more than 2 surfaces come together
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// in one edge. If one of them is mapped, keep that one and
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// map the others to it.
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Array<Array<SegmentIndex>> segmap(nseg);
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for(SegmentIndex sei = 0; sei < nseg; sei++)
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Point<3> p = mesh[pi];
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for(auto i : Range(blp.heights))
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{
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if(!segsel.Test(sei)) continue;
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const auto& segi = mesh[sei];
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for(SegmentIndex sej = 0; sej < nseg; sej++)
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{
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if(sej == sei || !segsel.Test(sej)) continue;
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const auto& segj = mesh[sej];
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if(segi[0] == segj[0] && segi[1] == segj[1])
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{
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SegmentIndex main, other;
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if(blp.surfid.Contains(segi.si))
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{ main = sei; other = sej; }
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else { main = sej; other = sei; }
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segsel.Clear(other);
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for(auto& s : segmap[other])
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segmap[main].Append(s);
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segmap[other].SetSize(0);
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segmap[main].Append(other);
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if(other == sei) sej = nseg;
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}
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p += blp.heights[i] * growthvectors[pi];
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mapto[pi].Append(mesh.AddPoint(p));
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}
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}
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PrintMessage(3, "Adding 2D Quad elements on required surfaces...");
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// add 2d quads on required surfaces
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map<pair<PointIndex, PointIndex>, int> seg2edge;
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if(blp.grow_edges)
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for(SegmentIndex sei = 0; sei < nseg; sei++)
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{
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// Only go in if the segment is still active, and if both its
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// surface index is part of the "hit-list"
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if(segsel.Test(sei))
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for(auto sei : moved_segs)
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{
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// copy here since we will add segments and this would
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// invalidate a reference!
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auto segi = mesh[sei];
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if(blp.surfid.Contains(segi.si))
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for(auto [sej, type] : segmap[sei])
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{
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// clear the bit to indicate that this segment has been processed
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segsel.Clear(sei);
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// Find matching segment pair on other surface
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for(SegmentIndex sej = 0; sej < nseg; sej++)
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{
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// copy here since we will add segments and this would
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// invalidate a reference!
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auto segj = mesh[sej];
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// Find the segment pair on the neighbouring surface element
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// Identified by: seg1[0] = seg_pair[1] and seg1[1] = seg_pair[0]
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if(segsel.Test(sej) && ((segi[0] == segj[1]) && (segi[1] == segj[0])))
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if(type == 0)
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{
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// clear bit to indicate that processing of this segment is done
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segsel.Clear(sej);
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|
||||
// if segj is not in surfel list we nned to add quads
|
||||
if(!blp.surfid.Contains(segj.si))
|
||||
{
|
||||
SurfaceElementIndex pnt_commelem;
|
||||
SetInvalid(pnt_commelem);
|
||||
|
||||
auto pnt1_elems = meshtopo.GetVertexSurfaceElements(segj[0]);
|
||||
auto pnt2_elems = meshtopo.GetVertexSurfaceElements(segj[1]);
|
||||
|
||||
for(auto pnt1_sei : pnt1_elems)
|
||||
if(mesh[pnt1_sei].GetIndex() == segj.si)
|
||||
for(auto pnt2_sei : pnt2_elems)
|
||||
if(pnt1_sei == pnt2_sei)
|
||||
pnt_commelem = pnt1_sei;
|
||||
|
||||
if(IsInvalid(pnt_commelem))
|
||||
throw Exception("Couldn't find element on other side for " + ToString(segj[0]) + " to " + ToString(segj[1]));
|
||||
|
||||
const auto& commsel = mesh[pnt_commelem];
|
||||
Element2d sel(QUAD);
|
||||
auto seg_p1 = segi[0];
|
||||
auto seg_p2 = segi[1];
|
||||
if(blp.outside)
|
||||
Swap(seg_p1, seg_p2);
|
||||
sel[0] = seg_p1;
|
||||
sel[1] = seg_p2;
|
||||
sel[2] = mapto[seg_p2];
|
||||
sel[3] = mapto[seg_p1];
|
||||
auto domains = make_tuple(commsel.GetIndex(), blp.new_matnrs[layer-1], mesh.GetFaceDescriptor(commsel.GetIndex()).DomainOut());
|
||||
|
||||
if(domains_to_surf_index.find(domains) == domains_to_surf_index.end())
|
||||
{
|
||||
domains_to_surf_index[domains] = ++max_surface_index;
|
||||
domains_to_surf_index[make_tuple(max_surface_index, get<1>(domains), get<2>(domains))] = max_surface_index;
|
||||
FaceDescriptor fd(-1,
|
||||
get<1>(domains),
|
||||
get<2>(domains),
|
||||
-1);
|
||||
fd.SetBCProperty(max_surface_index);
|
||||
mesh.AddFaceDescriptor(fd);
|
||||
mesh.SetBCName(max_surface_index-1,
|
||||
mesh.GetBCName(get<0>(domains)-1));
|
||||
Segment s;
|
||||
s[0] = mapto[segj[0]].Last();
|
||||
s[1] = mapto[segj[1]].Last();
|
||||
s[2] = PointIndex::INVALID;
|
||||
auto pair = s[0] < s[1] ? make_pair(s[0], s[1]) : make_pair(s[1], s[0]);
|
||||
if(seg2edge.find(pair) == seg2edge.end())
|
||||
seg2edge[pair] = ++max_edge_nr;
|
||||
s.edgenr = seg2edge[pair];
|
||||
s.si = si_map[segj.si];
|
||||
mesh.AddSegment(s);
|
||||
}
|
||||
auto new_index = domains_to_surf_index[domains];
|
||||
sel.SetIndex(new_index);
|
||||
// here we need to grow the quad elements
|
||||
else if(type == 1)
|
||||
{
|
||||
PointIndex pp1 = segj[1];
|
||||
PointIndex pp2 = segj[0];
|
||||
if(in_surface_direction.Test(segj.si))
|
||||
{
|
||||
Swap(pp1, pp2);
|
||||
move_boundaries.SetBit(segj.si);
|
||||
}
|
||||
PointIndex p1 = pp1;
|
||||
PointIndex p2 = pp2;
|
||||
PointIndex p3, p4;
|
||||
Segment s0;
|
||||
s0[0] = p1;
|
||||
s0[1] = p2;
|
||||
s0[2] = PointIndex::INVALID;
|
||||
s0.edgenr = segj.edgenr;
|
||||
s0.si = segj.si;
|
||||
mesh.AddSegment(s0);
|
||||
|
||||
for(auto i : Range(blp.heights))
|
||||
{
|
||||
Element2d sel(QUAD);
|
||||
p3 = mapto[pp2][i];
|
||||
p4 = mapto[pp1][i];
|
||||
sel[0] = p1;
|
||||
sel[1] = p2;
|
||||
sel[2] = p3;
|
||||
sel[3] = p4;
|
||||
sel.SetIndex(segj.si);
|
||||
mesh.AddSurfaceElement(sel);
|
||||
|
||||
// Add segments
|
||||
Segment seg_1, seg_2;
|
||||
seg_1[0] = mapto[seg_p1];
|
||||
seg_1[1] = seg_p1;
|
||||
seg_2[0] = seg_p2;
|
||||
seg_2[1] = mapto[seg_p2];
|
||||
auto points = make_tuple(seg_p1, mapto[seg_p1]);
|
||||
if(pi_to_edgenr.find(points) == pi_to_edgenr.end())
|
||||
pi_to_edgenr[points] = ++max_edge_nr;
|
||||
seg_1.edgenr = pi_to_edgenr[points];
|
||||
seg_1[2] = PointIndex::INVALID;
|
||||
seg_1.si = new_index;
|
||||
mesh.AddSegment(seg_1);
|
||||
|
||||
points = make_tuple(seg_p2, mapto[seg_p2]);
|
||||
if(pi_to_edgenr.find(points) == pi_to_edgenr.end())
|
||||
pi_to_edgenr[points] = ++max_edge_nr;
|
||||
|
||||
seg_2[2] = PointIndex::INVALID;
|
||||
seg_2.edgenr = pi_to_edgenr[points];
|
||||
seg_2.si = new_index;
|
||||
mesh.AddSegment(seg_2);
|
||||
// TODO: Too many, would be enough to only add outermost ones
|
||||
Segment s1;
|
||||
s1[0] = p2;
|
||||
s1[1] = p3;
|
||||
s1[2] = PointIndex::INVALID;
|
||||
auto pair = make_pair(p2, p3);
|
||||
if(seg2edge.find(pair) == seg2edge.end())
|
||||
seg2edge[pair] = ++max_edge_nr;
|
||||
s1.edgenr = seg2edge[pair];
|
||||
s1.si = segj.si;
|
||||
mesh.AddSegment(s1);
|
||||
Segment s2;
|
||||
s2[0] = p4;
|
||||
s2[1] = p1;
|
||||
s2[2] = PointIndex::INVALID;
|
||||
pair = make_pair(p1, p4);
|
||||
if(seg2edge.find(pair) == seg2edge.end())
|
||||
seg2edge[pair] = ++max_edge_nr;
|
||||
s2.edgenr = seg2edge[pair];
|
||||
s2.si = segj.si;
|
||||
mesh.AddSegment(s2);
|
||||
p1 = p4;
|
||||
p2 = p3;
|
||||
}
|
||||
|
||||
// in last layer insert new segments
|
||||
if(layer == blp.heights.Size())
|
||||
{
|
||||
max_edge_nr++;
|
||||
if(!blp.surfid.Contains(segj.si))
|
||||
{
|
||||
Segment s3 = segj;
|
||||
s3.si = map_surface_index(segj.si)-1;
|
||||
Swap(s3[0], s3[1]);
|
||||
if(blp.outside)
|
||||
{
|
||||
s3[0] = mapto[s3[0]];
|
||||
s3[1] = mapto[s3[1]];
|
||||
}
|
||||
else
|
||||
s3.edgenr = max_edge_nr;
|
||||
Segment s3;
|
||||
s3[0] = p3;
|
||||
s3[1] = p4;
|
||||
s3[2] = PointIndex::INVALID;
|
||||
auto pair = p3 < p4 ? make_pair(p3, p4) : make_pair(p4, p3);
|
||||
if(seg2edge.find(pair) == seg2edge.end())
|
||||
seg2edge[pair] = ++max_edge_nr;
|
||||
s3.edgenr = seg2edge[pair];
|
||||
s3.si = segj.si;
|
||||
mesh.AddSegment(s3);
|
||||
}
|
||||
Segment s1 = segi;
|
||||
Segment s2 = segj;
|
||||
s1.edgenr = max_edge_nr;
|
||||
s2.edgenr = max_edge_nr;
|
||||
auto side_surf = domains_to_surf_index[make_tuple(s2.si, blp.new_matnrs[layer-1], mesh.GetFaceDescriptor(s2.si).DomainOut())];
|
||||
if(blp.surfid.Contains(segj.si))
|
||||
s2.si = map_surface_index(segj.si);
|
||||
else
|
||||
{
|
||||
if(blp.outside)
|
||||
{
|
||||
s2.si = side_surf;
|
||||
}
|
||||
else
|
||||
mesh[sej].si = side_surf;
|
||||
}
|
||||
s1.si = map_surface_index(s1.si);
|
||||
s1.surfnr1 = s1.surfnr2 = s2.surfnr1 = s2.surfnr2 = -1;
|
||||
mesh.AddSegment(s1);
|
||||
mesh.AddSegment(s2);
|
||||
}
|
||||
|
||||
segmap.SetSize(mesh.LineSegments().Size());
|
||||
for(auto sei2 : segmap[sei])
|
||||
{
|
||||
auto& s = mesh[sei2];
|
||||
if(blp.outside && layer == blp.heights.Size())
|
||||
{
|
||||
if(blp.surfid.Contains(s.si))
|
||||
s.si = map_surface_index(s.si);
|
||||
s.edgenr = max_edge_nr;
|
||||
}
|
||||
else
|
||||
{
|
||||
s[0] = mapto[s[0]];
|
||||
s[1] = mapto[s[1]];
|
||||
}
|
||||
}
|
||||
for(auto sej2 : segmap[sej])
|
||||
{
|
||||
auto& s = mesh[sej2];
|
||||
if(blp.outside && layer == blp.heights.Size())
|
||||
{
|
||||
if(blp.surfid.Contains(s.si))
|
||||
s.si = map_surface_index(s.si);
|
||||
s.edgenr = max_edge_nr;
|
||||
}
|
||||
else
|
||||
{
|
||||
s[0] = mapto[s[0]];
|
||||
s[1] = mapto[s[1]];
|
||||
}
|
||||
}
|
||||
|
||||
// do not use segi (not even with reference, since
|
||||
// mesh.AddSegment will resize segment array and
|
||||
// invalidate reference), this is why we copy it!!!
|
||||
mesh[sei][0] = mapto[segi[0]];
|
||||
mesh[sei][1] = mapto[segi[1]];
|
||||
mesh[sej][0] = mapto[segj[0]];
|
||||
mesh[sej][1] = mapto[segj[1]];
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
// check if it doesn't contain the other edge as well
|
||||
// and if it doesn't contain both mark them as done and
|
||||
// if necessary map them
|
||||
for(SegmentIndex sej = 0; sej<nseg; sej++)
|
||||
{
|
||||
if(segsel.Test(sej))
|
||||
{
|
||||
if(mesh[sej][0] == mesh[sei][1] &&
|
||||
mesh[sej][1] == mesh[sei][0])
|
||||
{
|
||||
if(!blp.surfid.Contains(mesh[sej].si))
|
||||
{
|
||||
segsel.Clear(sei);
|
||||
segsel.Clear(sej);
|
||||
PointIndex mapped_point = PointIndex::INVALID;
|
||||
auto p1 = mesh[sei][0];
|
||||
auto p2 = mesh[sei][1];
|
||||
if(mapto[p1].IsValid())
|
||||
mapped_point = p1;
|
||||
else if(mapto[p2].IsValid())
|
||||
mapped_point = p2;
|
||||
else
|
||||
continue;
|
||||
auto other_point = mapped_point == p1 ? p2 : p1;
|
||||
if(growthvectors[mapped_point] * (mesh[other_point] - mesh[mapped_point]) < 0)
|
||||
{
|
||||
if(mapto[mesh[sei][0]].IsValid())
|
||||
mesh[sei][0] = mapto[mesh[sei][0]];
|
||||
if(mapto[mesh[sei][1]].IsValid())
|
||||
mesh[sei][1] = mapto[mesh[sei][1]];
|
||||
if(mapto[mesh[sej][0]].IsValid())
|
||||
mesh[sej][0] = mapto[mesh[sej][0]];
|
||||
if(mapto[mesh[sej][1]].IsValid())
|
||||
mesh[sej][1] = mapto[mesh[sej][1]];
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// add surface elements between layer and old domain
|
||||
if(layer == blp.heights.Size())
|
||||
{
|
||||
for(SurfaceElementIndex si = 0; si < nse; si++)
|
||||
{
|
||||
const auto& sel = mesh[si];
|
||||
if(blp.surfid.Contains(sel.GetIndex()))
|
||||
{
|
||||
Element2d newel = sel;
|
||||
newel.SetIndex(map_surface_index(sel.GetIndex()));
|
||||
mesh.AddSurfaceElement(newel);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Add prismatic cells at the boundaries
|
||||
PrintMessage(3, "Generating prism boundary layer volume elements...");
|
||||
|
||||
for(SurfaceElementIndex si = 0; si < nse; si++)
|
||||
{
|
||||
const auto& sel = mesh[si];
|
||||
if(blp.surfid.Contains(sel.GetIndex()))
|
||||
auto& sel = mesh[si];
|
||||
if(si_map[sel.GetIndex()] != -1)
|
||||
{
|
||||
int classify = 0;
|
||||
for(auto j : Range(sel.PNums()))
|
||||
if (mapto[sel[j]].IsValid())
|
||||
classify += (1 << j);
|
||||
|
||||
if(classify == 0)
|
||||
continue;
|
||||
|
||||
Element el;
|
||||
|
||||
if(sel.GetType() == TRIG)
|
||||
Array<PointIndex> points(sel.PNums());
|
||||
if(surfacefacs[sel.GetIndex()] > 0) Swap(points[0], points[2]);
|
||||
for(auto j : Range(blp.heights))
|
||||
{
|
||||
ELEMENT_TYPE types[] = { PRISM, TET, TET, PYRAMID,
|
||||
TET, PYRAMID, PYRAMID, PRISM };
|
||||
int nums[] = { sel[0], sel[1], sel[2], mapto[sel[0]], mapto[sel[1]], mapto[sel[2]] };
|
||||
int vertices[][6] =
|
||||
{
|
||||
{ 0, 1, 2, 0, 1, 2 }, // should not occur
|
||||
{ 0, 2, 1, 3, 0, 0 },
|
||||
{ 0, 2, 1, 4, 0, 0 },
|
||||
{ 0, 1, 4, 3, 2, 0 },
|
||||
|
||||
{ 0, 2, 1, 5, 0, 0 },
|
||||
{ 2, 0, 3, 5, 1, 0 },
|
||||
{ 1, 2, 5, 4, 0, 0 },
|
||||
{ 0, 2, 1, 3, 5, 4 }
|
||||
};
|
||||
if(blp.outside)
|
||||
{
|
||||
if(classify != 7)
|
||||
throw Exception("Outside with non prisms not yet implemented");
|
||||
for(auto i : Range(6))
|
||||
vertices[7][i] = i;
|
||||
}
|
||||
|
||||
el = Element(types[classify]);
|
||||
for(auto i : Range(el.PNums()))
|
||||
el.PNums()[i] = nums[vertices[classify][i]];
|
||||
}
|
||||
else // sel.GetType() == QUAD
|
||||
{
|
||||
int nums[] = { sel[0], sel[1], sel[2], sel[3],
|
||||
mapto[sel[0]], mapto[sel[1]],
|
||||
mapto[sel[2]], mapto[sel[3]] };
|
||||
ArrayMem<int, 8> vertices;
|
||||
switch(classify)
|
||||
{
|
||||
case 6:
|
||||
{
|
||||
if(blp.outside)
|
||||
throw Exception("Type 6 quad outside layer is not yet implemented!");
|
||||
el = Element(PRISM);
|
||||
vertices = {0, 1, 5, 3, 2, 6};
|
||||
break;
|
||||
}
|
||||
case 9:
|
||||
{
|
||||
if(blp.outside)
|
||||
throw Exception("Type 9 quad outside layer is not yet implemented!");
|
||||
el = Element(PRISM);
|
||||
vertices = { 1, 4, 0, 2, 7, 3 };
|
||||
break;
|
||||
}
|
||||
case 15:
|
||||
{
|
||||
vertices = { 0, 1, 2, 3, 4, 5, 6, 7 };
|
||||
if(!blp.outside)
|
||||
{
|
||||
Swap(vertices[1], vertices[3]);
|
||||
Swap(vertices[5], vertices[7]);
|
||||
}
|
||||
el = Element(HEX);
|
||||
break;
|
||||
}
|
||||
default:
|
||||
throw Exception("Type " + ToString(classify) + " for quad layer not yet implemented!");
|
||||
}
|
||||
for(auto i : Range(el.PNums()))
|
||||
el.PNums()[i] = nums[vertices[i]];
|
||||
}
|
||||
el.SetIndex(blp.new_matnrs[layer-1]);
|
||||
auto eltype = points.Size() == 3 ? PRISM : HEX;
|
||||
Element el(eltype);
|
||||
for(auto i : Range(points))
|
||||
el[i] = points[i];
|
||||
for(auto i : Range(points))
|
||||
points[i] = mapto[sel.PNums()[i]][j];
|
||||
if(surfacefacs[sel.GetIndex()] > 0) Swap(points[0], points[2]);
|
||||
for(auto i : Range(points))
|
||||
el[sel.PNums().Size() + i] = points[i];
|
||||
el.SetIndex(new_mat_nr);
|
||||
mesh.AddVolumeElement(el);
|
||||
}
|
||||
Element2d newel = sel;
|
||||
for(auto& p : newel.PNums())
|
||||
p = mapto[p].Last();
|
||||
newel.SetIndex(si_map[sel.GetIndex()]);
|
||||
mesh.AddSurfaceElement(newel);
|
||||
}
|
||||
if(move_boundaries.Test(sel.GetIndex()))
|
||||
for(auto& p : sel.PNums())
|
||||
if(mapto[p].Size())
|
||||
p = mapto[p].Last();
|
||||
}
|
||||
|
||||
// Finally switch the point indices of the surface elements
|
||||
// to the newly added ones
|
||||
PrintMessage(3, "Transferring boundary layer surface elements to new vertex references...");
|
||||
|
||||
for(SurfaceElementIndex sei : Range(nse))
|
||||
for(SegmentIndex sei = 0; sei < nseg; sei++)
|
||||
{
|
||||
auto& sel = mesh[sei];
|
||||
if(!blp.surfid.Contains(sel.GetIndex()))
|
||||
{
|
||||
const auto& fd = mesh.GetFaceDescriptor(sel.GetIndex());
|
||||
if(blp.outside &&
|
||||
(!blp.domains[fd.DomainIn()] && !blp.domains[fd.DomainOut()]))
|
||||
continue;
|
||||
if(!blp.outside &&
|
||||
(blp.domains[fd.DomainIn()] || blp.domains[fd.DomainOut()]))
|
||||
continue;
|
||||
}
|
||||
for(auto& pnum : sel.PNums())
|
||||
if(mapto[pnum].IsValid())
|
||||
pnum = mapto[pnum];
|
||||
auto& seg = mesh[sei];
|
||||
if(move_boundaries.Test(seg.si))
|
||||
for(auto& p : seg.PNums())
|
||||
if(mapto[p].Size())
|
||||
p = mapto[p].Last();
|
||||
}
|
||||
|
||||
for(ElementIndex ei : Range(ne))
|
||||
for(ElementIndex ei = 0; ei < ne; ei++)
|
||||
{
|
||||
auto& el = mesh[ei];
|
||||
// only move the elements on the correct side
|
||||
if(blp.outside ? blp.domains[el.GetIndex()] : !blp.domains[el.GetIndex()])
|
||||
for(auto& pnum : el.PNums())
|
||||
if(mapto[pnum].IsValid())
|
||||
pnum = mapto[pnum];
|
||||
}
|
||||
|
||||
// Lock all the prism points so that the rest of the mesh can be
|
||||
// optimised without invalidating the entire mesh
|
||||
// for (PointIndex pi = mesh.Points().Begin(); pi < mesh.Points().End(); pi++)
|
||||
for (PointIndex pi = 1; pi <= np; pi++)
|
||||
if(bndnodes.Test(pi)) mesh.AddLockedPoint(pi);
|
||||
|
||||
// Now, actually pull back the old surface points to create
|
||||
// the actual boundary layers
|
||||
PrintMessage(3, "Moving and optimising boundary layer points...");
|
||||
|
||||
for (PointIndex i = 1; i <= np; i++)
|
||||
if(!domains[el.GetIndex()])
|
||||
{
|
||||
if(bndnodes.Test(i))
|
||||
{
|
||||
MeshPoint pointtomove;
|
||||
pointtomove = mesh.Point(i);
|
||||
mesh.Point(i).SetPoint(pointtomove + layerht * growthvectors[i]);
|
||||
for(auto& p : el.PNums())
|
||||
if(mapto[p].Size())
|
||||
p = mapto[p].Last();
|
||||
}
|
||||
}
|
||||
mesh.Compress();
|
||||
}
|
||||
|
||||
for(int i=1; i <= mesh.GetNFD(); i++)
|
||||
for(auto i : Range(1, fd_old+1))
|
||||
if(si_map[i] != -1)
|
||||
{
|
||||
auto& fd = mesh.GetFaceDescriptor(i);
|
||||
if(blp.surfid.Contains(fd.BCProperty()))
|
||||
{
|
||||
if(blp.outside)
|
||||
fd.SetDomainOut(blp.new_matnrs[blp.new_matnrs.Size()-1]);
|
||||
if(mesh.GetFaceDescriptor(mesh.GetNFD()).DomainIn() == new_mat_nr)
|
||||
mesh.GetFaceDescriptor(i).SetDomainOut(new_mat_nr);
|
||||
else
|
||||
fd.SetDomainIn(blp.new_matnrs[blp.new_matnrs.Size()-1]);
|
||||
mesh.GetFaceDescriptor(i).SetDomainIn(new_mat_nr);
|
||||
}
|
||||
}
|
||||
|
||||
PrintMessage(3, "New NP: ", mesh.GetNP());
|
||||
PrintMessage(1, "Boundary Layer Generation....Done!");
|
||||
}
|
||||
}
|
||||
|
||||
@ -14,7 +14,7 @@ public:
|
||||
// parameters by Philippose ..
|
||||
Array<int> surfid;
|
||||
Array<double> heights;
|
||||
Array<size_t> new_matnrs;
|
||||
string new_mat;
|
||||
BitArray domains;
|
||||
bool outside = false; // set the boundary layer on the outside
|
||||
bool grow_edges = false;
|
||||
|
||||
@ -1017,9 +1017,8 @@ DLL_HEADER void ExportNetgenMeshing(py::module &m)
|
||||
|
||||
.def ("BoundaryLayer", [](Mesh & self, variant<string, int> boundary,
|
||||
variant<double, py::list> thickness,
|
||||
variant<string, py::list> material,
|
||||
string material,
|
||||
variant<string, int> domain, bool outside,
|
||||
bool grow_edges,
|
||||
optional<string> project_boundaries)
|
||||
{
|
||||
BoundaryLayerParameters blp;
|
||||
@ -1050,6 +1049,7 @@ DLL_HEADER void ExportNetgenMeshing(py::module &m)
|
||||
}
|
||||
}
|
||||
}
|
||||
blp.new_mat = material;
|
||||
|
||||
if(project_boundaries.has_value())
|
||||
{
|
||||
@ -1070,34 +1070,13 @@ DLL_HEADER void ExportNetgenMeshing(py::module &m)
|
||||
blp.heights.Append(val.cast<double>());
|
||||
}
|
||||
|
||||
auto prismlayers = blp.heights.Size();
|
||||
auto first_new_mat = self.GetNDomains() + 1;
|
||||
auto max_dom_nr = first_new_mat;
|
||||
if(string* pmaterial = get_if<string>(&material); pmaterial)
|
||||
{
|
||||
self.SetMaterial(first_new_mat, *pmaterial);
|
||||
for(auto i : Range(prismlayers))
|
||||
blp.new_matnrs.Append(first_new_mat);
|
||||
}
|
||||
else
|
||||
{
|
||||
auto materials = *get_if<py::list>(&material);
|
||||
if(py::len(materials) != prismlayers)
|
||||
throw Exception("Length of thicknesses and materials must be same!");
|
||||
for(auto i : Range(prismlayers))
|
||||
{
|
||||
self.SetMaterial(first_new_mat+i, materials[i].cast<string>());
|
||||
blp.new_matnrs.Append(first_new_mat + i);
|
||||
}
|
||||
max_dom_nr += prismlayers-1;
|
||||
}
|
||||
|
||||
blp.domains.SetSize(max_dom_nr + 1); // one based
|
||||
int nr_domains = self.GetNDomains();
|
||||
blp.domains.SetSize(nr_domains + 1); // one based
|
||||
blp.domains.Clear();
|
||||
if(string* pdomain = get_if<string>(&domain); pdomain)
|
||||
{
|
||||
regex pattern(*pdomain);
|
||||
for(auto i : Range(1, first_new_mat))
|
||||
for(auto i : Range(1, nr_domains+1))
|
||||
if(regex_match(self.GetMaterial(i), pattern))
|
||||
blp.domains.SetBit(i);
|
||||
}
|
||||
@ -1106,19 +1085,15 @@ DLL_HEADER void ExportNetgenMeshing(py::module &m)
|
||||
auto idomain = *get_if<int>(&domain);
|
||||
blp.domains.SetBit(idomain);
|
||||
}
|
||||
// bits for new domains must be set
|
||||
if(!outside)
|
||||
for(auto i : Range(first_new_mat, max_dom_nr+1))
|
||||
blp.domains.SetBit(i);
|
||||
|
||||
blp.outside = outside;
|
||||
blp.grow_edges = grow_edges;
|
||||
blp.grow_edges = true;
|
||||
|
||||
GenerateBoundaryLayer (self, blp);
|
||||
self.UpdateTopology();
|
||||
}, py::arg("boundary"), py::arg("thickness"), py::arg("material"),
|
||||
py::arg("domains") = ".*", py::arg("outside") = false,
|
||||
py::arg("grow_edges") = false, py::arg("project_boundaries")=nullopt,
|
||||
py::arg("project_boundaries")=nullopt,
|
||||
R"delimiter(
|
||||
Add boundary layer to mesh.
|
||||
|
||||
|
||||
@ -18,7 +18,7 @@ def test_boundarylayer(outside, capfd):
|
||||
mesh = unit_cube.GenerateMesh(maxh=0.3)
|
||||
ne_before = mesh.ne
|
||||
layer_surfacenames = ["right", "top", "left", "back", "bottom"]
|
||||
mesh.BoundaryLayer("|".join(layer_surfacenames), [0.01, 0.02], "layer", outside=outside, grow_edges=True)
|
||||
mesh.BoundaryLayer("|".join(layer_surfacenames), [0.01, 0.01], "layer", outside=outside)
|
||||
|
||||
should_ne = ne_before + 2 * GetNSurfaceElements(mesh, layer_surfacenames)
|
||||
assert mesh.ne == should_ne
|
||||
@ -26,7 +26,7 @@ def test_boundarylayer(outside, capfd):
|
||||
assert not "elements are not matching" in capture.out
|
||||
|
||||
for side in ["front"]:
|
||||
mesh.BoundaryLayer(side, [0.001, 0.002], "layer", outside=outside, grow_edges=True)
|
||||
mesh.BoundaryLayer(side, [0.001, 0.001], "layer", outside=outside)
|
||||
should_ne += 2 * GetNSurfaceElements(mesh, [side])
|
||||
assert mesh.ne == should_ne
|
||||
capture = capfd.readouterr()
|
||||
@ -53,8 +53,8 @@ def test_boundarylayer2(outside, version, capfd):
|
||||
geo.CloseSurfaces(top, bot, [])
|
||||
mesh = geo.GenerateMesh()
|
||||
should_ne = mesh.ne + 2 * GetNSurfaceElements(mesh, ["default"], "part")
|
||||
layersize = 0.05
|
||||
mesh.BoundaryLayer("default", [0.5 * layersize, layersize], "part", domains="part", outside=outside, grow_edges=True)
|
||||
layersize = 0.025
|
||||
mesh.BoundaryLayer("default", [layersize, layersize], "part", domains="part", outside=outside)
|
||||
assert mesh.ne == should_ne
|
||||
assert not "elements are not matching" in capfd.readouterr().out
|
||||
import netgen.gui
|
||||
@ -73,8 +73,7 @@ def test_wrong_orientation(outside):
|
||||
|
||||
mesh = geo.GenerateMesh()
|
||||
|
||||
mesh.BoundaryLayer(".*", 0.1, "air", domains="air", outside=outside,
|
||||
grow_edges=True)
|
||||
mesh.BoundaryLayer(".*", 0.1, "air", domains="air", outside=outside)
|
||||
ngs = pytest.importorskip("ngsolve")
|
||||
mesh = ngs.Mesh(mesh)
|
||||
assert ngs.Integrate(1, mesh) == pytest.approx(1.2**3 if outside else 1)
|
||||
@ -88,8 +87,7 @@ def test_splitted_surface():
|
||||
geo.Add((brick*slots).mat("slot"))
|
||||
|
||||
mesh = geo.GenerateMesh()
|
||||
mesh.BoundaryLayer(".*", [0.001, 0.002], "block", "block", outside=False,
|
||||
grow_edges=True)
|
||||
mesh.BoundaryLayer(".*", [0.001, 0.001], "block", "block", outside=False)
|
||||
ngs = pytest.importorskip("ngsolve")
|
||||
mesh = ngs.Mesh(mesh)
|
||||
assert ngs.Integrate(1, mesh) == pytest.approx(1)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user