mirror of
https://github.com/NGSolve/netgen.git
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improve functionality of boundarylayer
This commit is contained in:
Christopher Lackner
parent
7fe4ca9c4f
commit
d752ada2bd
@ -103,7 +103,7 @@ namespace netgen
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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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Vec<3> GetSurfaceNormal(Mesh & mesh, const Element2d & el)
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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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@ -115,12 +115,9 @@ namespace netgen
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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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@ -149,10 +146,38 @@ namespace netgen
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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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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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FaceDescriptor fd(max_surface_index-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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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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mesh.UpdateTopology();
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auto& meshtopo = mesh.GetTopology();
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@ -213,7 +238,7 @@ namespace netgen
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}
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if (!blp.grow_edges)
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for(const auto& sel : mesh.SurfaceElements())
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for(const auto& sel : mesh.LineSegments())
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{
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bndnodes.Clear(sel[0]);
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bndnodes.Clear(sel[1]);
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@ -241,8 +266,6 @@ namespace netgen
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}
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growthvectors[pi] += veci;
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}
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// growthvectors[pi].Normalize();
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// growthvectors[pi] *= -1.0;
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}
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else
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{
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@ -251,7 +274,6 @@ namespace netgen
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}
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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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@ -271,7 +293,9 @@ namespace netgen
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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) && blp.surfid.Contains(mesh[sei].si))
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if(segsel.Test(sei))
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{
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if(blp.surfid.Contains(mesh[sei].si))
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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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@ -300,34 +324,20 @@ namespace netgen
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auto pnt2_elems = meshtopo.GetVertexSurfaceElements(segpair_p2);
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for(auto pnt1_sei : pnt1_elems)
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{
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const auto& pnt1_sel = mesh[pnt1_sei];
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if(mesh[pnt1_sei].GetIndex() == mesh[sej].si)
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for(auto pnt2_sei : pnt2_elems)
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{
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const Element2d & pnt2_sel = mesh.SurfaceElement(pnt2_sei);
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if((pnt1_sel.GetIndex() == mesh[sej].si)
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&& (pnt2_sel.GetIndex() == mesh[sej].si)
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&& (pnt1_sei == pnt2_sei))
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{
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if(pnt1_sei == pnt2_sei)
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pnt_commelem = pnt1_sei;
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}
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}
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}
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const Element2d & commsel = mesh.SurfaceElement(pnt_commelem);
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if(IsInvalid(pnt_commelem))
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throw Exception("Couldn't find element on other side for " + ToString(segpair_p1) + " to " + ToString(segpair_p2));
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const auto& commsel = mesh[pnt_commelem];
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auto surfelem_vect = GetSurfaceNormal(mesh, commsel);
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if(blp.outside)
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surfelem_vect *= -1;
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double surfangle = Angle(growthvectors[segpair_p1],surfelem_vect);
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// remap the segments to the new points
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if(!blp.outside)
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{
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mesh[sei][0] = mapto[seg_p1];
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mesh[sei][1] = mapto[seg_p2];
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mesh[sej][1] = mapto[seg_p1];
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mesh[sej][0] = mapto[seg_p2];
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}
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if((surfangle < (90 + angleThreshold) * 3.141592 / 180.0)
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&& (surfangle > (90 - angleThreshold) * 3.141592 / 180.0))
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@ -342,61 +352,181 @@ namespace netgen
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Element2d sel(QUAD);
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if(blp.outside)
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Swap(seg_p1, seg_p2);
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sel.PNum(4) = mapto[seg_p1];
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sel.PNum(3) = mapto[seg_p2];
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sel.PNum(2) = seg_p2;
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sel.PNum(1) = seg_p1;
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sel.SetIndex(mesh[sej].si);
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sel[0] = seg_p1;
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sel[1] = seg_p2;
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sel[2] = mapto[seg_p2];
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sel[3] = mapto[seg_p1];
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auto domains = make_tuple(commsel.GetIndex(), blp.new_matnrs[layer-1], mesh.GetFaceDescriptor(commsel.GetIndex()).DomainOut());
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if(domains_to_surf_index.find(domains) == domains_to_surf_index.end())
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{
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domains_to_surf_index[domains] = ++max_surface_index;
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domains_to_surf_index[make_tuple(max_surface_index, get<1>(domains), get<2>(domains))] = max_surface_index;
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FaceDescriptor fd(max_surface_index-1,
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get<1>(domains),
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get<2>(domains),
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-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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mesh.GetBCName(get<0>(domains)-1));
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}
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auto new_index = domains_to_surf_index[domains];
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sel.SetIndex(new_index);
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mesh.AddSurfaceElement(sel);
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numquads++;
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// Add segments
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Segment seg_1, seg_2;
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seg_1[0] = mapto[seg_p1];
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seg_1[1] = seg_p1;
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seg_2[0] = seg_p2;
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seg_2[1] = mapto[seg_p2];
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auto points = make_tuple(seg_p1, mapto[seg_p1]);
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if(pi_to_edgenr.find(points) == pi_to_edgenr.end())
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pi_to_edgenr[points] = ++max_edge_nr;
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seg_1.edgenr = pi_to_edgenr[points];
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seg_1[2] = PointIndex::INVALID;
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seg_1.si = new_index;
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mesh.AddSegment(seg_1);
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points = make_tuple(seg_p2, mapto[seg_p2]);
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if(pi_to_edgenr.find(points) == pi_to_edgenr.end())
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pi_to_edgenr[points] = ++max_edge_nr;
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seg_2[2] = PointIndex::INVALID;
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seg_2.edgenr = pi_to_edgenr[points];
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seg_2.si = new_index;
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mesh.AddSegment(seg_2);
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mesh[sej].si = new_index;
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}
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else
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{
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for (int k = 0; k < pnt1_elems.Size(); k++)
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for(auto pnt1_ei : pnt1_elems)
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{
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Element2d & pnt_sel = mesh.SurfaceElement(pnt1_elems[k]);
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auto& pnt_sel = mesh[pnt1_ei];
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if(pnt_sel.GetIndex() == mesh[sej].si)
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{
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for(int l = 0; l < pnt_sel.GetNP(); l++)
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for(auto& pi : pnt_sel.PNums())
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{
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if(pnt_sel[l] == segpair_p1)
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pnt_sel[l] = mapto[seg_p1];
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else if (pnt_sel[l] == segpair_p2)
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pnt_sel[l] = mapto[seg_p2];
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if(pi == segpair_p1)
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pi = mapto[seg_p1];
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else if(pi == segpair_p2)
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pi = mapto[seg_p2];
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}
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}
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}
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for (int k = 0; k < pnt2_elems.Size(); k++)
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for(auto sk : pnt2_elems)
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{
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Element2d & pnt_sel = mesh.SurfaceElement(pnt2_elems[k]);
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auto& pnt_sel = mesh[sk];
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if(pnt_sel.GetIndex() == mesh[sej].si)
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{
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for(int l = 0; l < pnt_sel.GetNP(); l++)
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for(auto& p : pnt_sel.PNums())
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{
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if(pnt_sel[l] == segpair_p1)
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pnt_sel[l] = mapto[seg_p1];
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else if (pnt_sel[l] == segpair_p2)
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pnt_sel[l] = mapto[seg_p2];
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if(p == segpair_p1)
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p = mapto[seg_p1];
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else if (p == segpair_p2)
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p = mapto[seg_p2];
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}
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}
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}
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}
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// }
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}
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// in last layer insert new segments
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if(layer == blp.heights.Size())
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{
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Segment s1 = mesh[sei];
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Segment s2 = mesh[sej];
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s1.edgenr = ++max_edge_nr;
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s2.edgenr = max_edge_nr;
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bool create_it = true;
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if(blp.surfid.Contains(mesh[sej].si))
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{
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if(last_layer_surface_index_map.find(s1.si) != last_layer_surface_index_map.end() &&
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last_layer_surface_index_map.find(s2.si) != last_layer_surface_index_map.end())
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// edge already mapped
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create_it = false;
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s2.si = map_surface_index(s2.si);
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}
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else
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{
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// If the code comes here, it indicates that we are at
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// a line segment pair which is at the intersection
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// of two surfaces, both of which have to grow boundary
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// layers.... here too, remapping the segments to the
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// new points is required
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mesh[sei][0] = mapto[seg_p1];
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mesh[sei][1] = mapto[seg_p2];
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mesh[sej][1] = mapto[seg_p1];
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mesh[sej][0] = mapto[seg_p2];
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s2.si = domains_to_surf_index[make_tuple(s2.si,
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blp.new_matnrs[layer-1], mesh.GetFaceDescriptor(s2.si).DomainOut())];
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}
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s1.si = map_surface_index(s1.si);
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if(create_it)
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{
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mesh.AddSegment(s1);
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mesh.AddSegment(s2);
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}
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}
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// remap the segments to the new points
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mesh[sei][0] = mapto[mesh[sei][0]];
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mesh[sei][1] = mapto[mesh[sei][1]];
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mesh[sej][1] = mapto[mesh[sej][1]];
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mesh[sej][0] = mapto[mesh[sej][0]];
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}
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}
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}
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else
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{
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// check if it doesn't contain the other edge as well
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// and if it doesn't contain both mark them as done and
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// if necessary map them
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for(SegmentIndex sej = 0; sej<nseg; sej++)
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{
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if(mesh[sej][0] == mesh[sei][1] &&
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mesh[sej][1] == mesh[sei][0])
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{
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if(!blp.surfid.Contains(mesh[sej].si))
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{
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segsel.Clear(sei);
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segsel.Clear(sej);
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PointIndex mapped_point = PointIndex::INVALID;
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auto p1 = mesh[sei][0];
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auto p2 = mesh[sei][1];
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if(mapto[p1].IsValid())
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mapped_point = p1;
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else if(mapto[p2].IsValid())
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mapped_point = p2;
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else
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continue;
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auto other_point = mapped_point == p1 ? p2 : p1;
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if(growthvectors[mapped_point] * (mesh[other_point] - mesh[mapped_point]) < 0)
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{
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if(mapto[mesh[sei][0]].IsValid())
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mesh[sei][0] = mapto[mesh[sei][0]];
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if(mapto[mesh[sei][1]].IsValid())
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mesh[sei][1] = mapto[mesh[sei][1]];
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if(mapto[mesh[sej][0]].IsValid())
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mesh[sej][0] = mapto[mesh[sej][0]];
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if(mapto[mesh[sej][1]].IsValid())
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mesh[sej][1] = mapto[mesh[sej][1]];
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}
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}
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else
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continue;
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}
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}
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}
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}
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}
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// add surface elements between layer and old domain
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if(layer == blp.heights.Size())
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{
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for(SurfaceElementIndex si = 0; si < nse; si++)
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{
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if(blp.surfid.Contains(mesh[si].GetIndex()))
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{
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const auto& sel = mesh[si];
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Element2d newel = sel;
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newel.SetIndex(map_surface_index(sel.GetIndex()));
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mesh.AddSurfaceElement(newel);
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}
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}
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}
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@ -406,16 +536,21 @@ namespace netgen
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for (SurfaceElementIndex si = 0; si < nse; si++)
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{
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Element2d & sel = mesh.SurfaceElement(si);
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const auto& sel = mesh[si];
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if(blp.surfid.Contains(sel.GetIndex()))
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{
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int classify = 0;
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for (int j = 0; j < 3; j++)
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for(auto j : Range(sel.PNums()))
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if (mapto[sel[j]].IsValid())
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classify += (1 << j);
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// cout << "classify = " << classify << endl;
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if(classify == 0)
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continue;
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Element el;
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if(sel.GetType() == TRIG)
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{
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ELEMENT_TYPE types[] = { PRISM, TET, TET, PYRAMID,
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TET, PYRAMID, PYRAMID, PRISM };
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int nums[] = { sel[0], sel[1], sel[2], mapto[sel[0]], mapto[sel[1]], mapto[sel[2]] };
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@ -439,11 +574,33 @@ namespace netgen
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vertices[7][i] = i;
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}
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Element el(types[classify]);
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for (int i = 0; i < 6; i++)
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el[i] = nums[vertices[classify][i]];
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el = Element(types[classify]);
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for(auto i : Range(el.PNums()))
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el.PNums()[i] = nums[vertices[classify][i]];
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}
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else // sel.GetType() == QUAD
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{
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int nums[] = { sel[0], sel[1], sel[2], sel[3],
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mapto[sel[0]], mapto[sel[1]],
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mapto[sel[2]], mapto[sel[3]] };
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if(classify == 15)
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{
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int vertices[8] = { 0, 1, 2, 3, 4, 5, 6, 7 };
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if(!blp.outside)
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{
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Swap(vertices[1], vertices[3]);
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Swap(vertices[5], vertices[7]);
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}
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el = Element(HEX);
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for(auto i : Range(el.PNums()))
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el.PNums()[i] = nums[vertices[i]];
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}
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else
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{
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throw Exception("This type of quad layer not yet implemented!");
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}
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}
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el.SetIndex(blp.new_matnrs[layer-1]);
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if (classify != 0)
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mesh.AddVolumeElement(el);
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}
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}
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@ -455,8 +612,16 @@ namespace netgen
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for(SurfaceElementIndex sei : Range(nse))
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{
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auto& sel = mesh[sei];
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if((blp.outside && !blp.surfid.Contains(sel.GetIndex())) ||
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(!blp.outside && blp.surfid.Contains(sel.GetIndex())))
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bool to_move = blp.surfid.Contains(sel.GetIndex());
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if(blp.domains.Size())
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{
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if(blp.outside)
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to_move |= blp.domains[mesh.GetFaceDescriptor(sel.GetIndex()).DomainIn()];
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else
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to_move |= !blp.domains[mesh.GetFaceDescriptor(sel.GetIndex()).DomainIn()];
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}
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if(to_move)
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{
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for(auto& pnum : sel.PNums())
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// Check (Doublecheck) if the corresponding point has a
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@ -467,15 +632,16 @@ namespace netgen
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}
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}
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if(blp.outside)
|
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for(ElementIndex ei : Range(ne))
|
||||
{
|
||||
auto& el = mesh[ei];
|
||||
bool to_move = blp.outside ? blp.domains[el.GetIndex()] : !blp.domains[el.GetIndex()];
|
||||
if(blp.domains.Size() == 0 || to_move)
|
||||
for(auto& pnum : el.PNums())
|
||||
// Check (Doublecheck) if the corresponding point has a
|
||||
// copy available for remapping
|
||||
if(mapto[pnum].IsValid())
|
||||
// Map the surface elements to the new points
|
||||
// Map the volume elements to the new points
|
||||
pnum = mapto[pnum];
|
||||
}
|
||||
|
||||
@ -494,7 +660,6 @@ namespace netgen
|
||||
if(bndnodes.Test(i))
|
||||
{
|
||||
MeshPoint pointtomove;
|
||||
|
||||
pointtomove = mesh.Point(i);
|
||||
mesh.Point(i).SetPoint(pointtomove + layerht * growthvectors[i]);
|
||||
}
|
||||
@ -505,12 +670,12 @@ namespace netgen
|
||||
for(int i=1; i <= mesh.GetNFD(); i++)
|
||||
{
|
||||
auto& fd = mesh.GetFaceDescriptor(i);
|
||||
if(blp.surfid.Contains(fd.SurfNr()))
|
||||
if(blp.surfid.Contains(fd.BCProperty()))
|
||||
{
|
||||
if(blp.outside)
|
||||
fd.SetDomainOut(blp.new_matnrs[0]);
|
||||
fd.SetDomainOut(blp.new_matnrs[blp.new_matnrs.Size()-1]);
|
||||
else
|
||||
fd.SetDomainIn(blp.new_matnrs[0]);
|
||||
fd.SetDomainIn(blp.new_matnrs[blp.new_matnrs.Size()-1]);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
@ -15,6 +15,7 @@ public:
|
||||
Array<int> surfid;
|
||||
Array<double> heights;
|
||||
Array<size_t> new_matnrs;
|
||||
BitArray domains;
|
||||
bool outside = false; // set the boundary layer on the outside
|
||||
bool grow_edges = false;
|
||||
};
|
||||
|
||||
@ -966,12 +966,12 @@ DLL_HEADER void ExportNetgenMeshing(py::module &m)
|
||||
|
||||
auto prismlayers = blp.heights.Size();
|
||||
auto first_new_mat = self.GetNDomains() + 1;
|
||||
for(auto i : Range(prismlayers))
|
||||
blp.new_matnrs.Append(first_new_mat + i);
|
||||
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))
|
||||
self.SetMaterial(first_new_mat + i, *pmaterial);
|
||||
blp.new_matnrs.Append(first_new_mat);
|
||||
}
|
||||
else
|
||||
{
|
||||
@ -979,16 +979,41 @@ DLL_HEADER void ExportNetgenMeshing(py::module &m)
|
||||
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
|
||||
blp.domains.Clear();
|
||||
if(string* pdomain = get_if<string>(&domain); pdomain)
|
||||
{
|
||||
regex pattern(*pdomain);
|
||||
for(auto i : Range(1, first_new_mat))
|
||||
if(regex_match(self.GetMaterial(i), pattern))
|
||||
blp.domains.SetBit(i);
|
||||
}
|
||||
else
|
||||
{
|
||||
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;
|
||||
|
||||
GenerateBoundaryLayer (self, blp);
|
||||
self.UpdateTopology();
|
||||
}, py::arg("boundary"), py::arg("thickness"), py::arg("material"),
|
||||
py::arg("domain") = 1, py::arg("outside") = false,
|
||||
py::arg("grow_edges") = false, R"delimiter(
|
||||
py::arg("domains") = ".*", py::arg("outside") = false,
|
||||
py::arg("grow_edges") = false,
|
||||
R"delimiter(
|
||||
Add boundary layer to mesh.
|
||||
|
||||
Parameters
|
||||
@ -1003,8 +1028,8 @@ thickness : float or List[float]
|
||||
material : str or List[str]
|
||||
Material name of boundary layer(s).
|
||||
|
||||
domain : string or int
|
||||
Add layer into domain specified by name or number.
|
||||
domain : str or int
|
||||
Regexp for domain boundarylayer is going into.
|
||||
|
||||
outside : bool = False
|
||||
If true add the layer on the outside
|
||||
|
||||
@ -2,16 +2,30 @@
|
||||
import pytest
|
||||
from netgen.csg import *
|
||||
|
||||
def GetNSurfaceElements(mesh, boundary):
|
||||
nse_in_layer = 0
|
||||
for el in mesh.Elements2D():
|
||||
print(el.index)
|
||||
if mesh.GetBCName(el.index-1) == boundary:
|
||||
nse_in_layer += 1
|
||||
return nse_in_layer
|
||||
|
||||
@pytest.mark.parametrize("outside", [True, False])
|
||||
def test_boundarylayer(outside):
|
||||
def test_boundarylayer(outside, capfd):
|
||||
mesh = unit_cube.GenerateMesh(maxh=0.3)
|
||||
ne_before = mesh.ne
|
||||
nse_in_layer = 0
|
||||
layer_surfacenames = ["right", "top"]
|
||||
for el in mesh.Elements2D():
|
||||
if mesh.GetBCName(el.index-1) in layer_surfacenames:
|
||||
nse_in_layer += 1
|
||||
mesh.BoundaryLayer("|".join(layer_surfacenames), [0.01, 0.02], "layer", outside=outside, grow_edges=True)
|
||||
assert mesh.ne == ne_before + 2 * nse_in_layer
|
||||
|
||||
should_ne = ne_before + 2 * sum([GetNSurfaceElements(mesh, surf) for surf in layer_surfacenames])
|
||||
assert mesh.ne == should_ne
|
||||
capture = capfd.readouterr()
|
||||
assert not "elements are not matching" in capture.out
|
||||
|
||||
for side in ["front"]:
|
||||
mesh.BoundaryLayer(side, [0.001], "layer", outside=outside, grow_edges=True)
|
||||
should_ne += GetNSurfaceElements(mesh, side)
|
||||
assert mesh.ne == should_ne
|
||||
capture = capfd.readouterr()
|
||||
assert not "elements are not matching" in capture.out
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user