mirror of
https://github.com/NGSolve/netgen.git
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restructure MeshVolume
This commit is contained in:
Matthias Hochsteger
parent
62edae9b40
commit
7e344c2247
@ -1,5 +1,6 @@
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#include <mystdlib.h>
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#include "meshing.hpp"
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#include "debugging.hpp"
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namespace netgen
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{
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@ -10,6 +11,366 @@ namespace netgen
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extern const char * pyramidrules2[];
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extern const char * hexrules[];
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struct MeshingData
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{
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int domain;
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// mesh for one domain (contains all adjacent surface elments)
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Mesh mesh;
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// maps from lokal (domain) mesh to global mesh
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Array<PointIndex, PointIndex> pmap;
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// todo: store (mapped) identifications
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Array<INDEX_2> connected_pairs;
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MeshingParameters mp;
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unique_ptr<Meshing3> meshing;
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};
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// extract surface meshes belonging to individual domains
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Array<MeshingData> DivideMesh(const Mesh & mesh, const MeshingParameters & mp)
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{
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static Timer timer("DivideMesh"); RegionTimer rt(timer);
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Array<MeshingData> ret;
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auto num_domains = mesh.GetNDomains();
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ret.SetSize(num_domains);
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Array<Array<PointIndex, PointIndex>> ipmap;
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ipmap.SetSize(num_domains);
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auto dim = mesh.GetDimension();
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auto num_points = mesh.GetNP();
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auto num_facedescriptors = mesh.GetNFD();
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auto & identifications = mesh.GetIdentifications();
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for(auto i : Range(ret))
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{
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auto & md = ret[i];
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md.domain = i+1;
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if(mp.only3D_domain_nr && mp.only3D_domain_nr !=md.domain)
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continue;
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md.mp = mp;
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md.mp.maxh = min2 (mp.maxh, mesh.MaxHDomain(md.domain));
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auto & m = ret[i].mesh;
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m.SetLocalH(mesh.GetLocalH());
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ipmap[i].SetSize(num_points);
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ipmap[i] = PointIndex::INVALID;
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m.SetDimension( mesh.GetDimension() );
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for(auto i : Range(1, num_facedescriptors+1))
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m.AddFaceDescriptor( mesh.GetFaceDescriptor(i) );
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}
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// mark used points for each domain, add surface elements (with wrong point numbers) to domain mesh
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for(const auto & sel : mesh.SurfaceElements())
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{
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const auto & fd = mesh.GetFaceDescriptor(sel.GetIndex());
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int dom_in = fd.DomainIn();
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int dom_out = fd.DomainOut();
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for( auto dom : {dom_in, dom_out} )
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{
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if(dom==0)
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continue;
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if(mp.only3D_domain_nr && mp.only3D_domain_nr != dom)
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continue;
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auto & sels = ret[dom-1].mesh.SurfaceElements();
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for(auto pi : sel.PNums())
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ipmap[dom-1][pi] = 1;
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sels.Append(sel);
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}
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}
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// add used points to domain mesh, build point mapping
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for(auto i : Range(ret))
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{
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if(mp.only3D_domain_nr && mp.only3D_domain_nr != ret[i].domain)
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continue;
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auto & m = ret[i].mesh;
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auto & pmap = ret[i].pmap;
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for(auto pi : Range(ipmap[i]))
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if(ipmap[i][pi])
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{
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auto pi_new = m.AddPoint( mesh[pi] );
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ipmap[i][pi] = pi_new;
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pmap.Append( pi );
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}
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}
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NgArray<INDEX_2> connectednodes;
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for(auto i : Range(ret))
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{
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auto & imap = ipmap[i];
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if(mp.only3D_domain_nr && mp.only3D_domain_nr != ret[i].domain)
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continue;
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auto & m = ret[i].mesh;
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for (auto & sel : m.SurfaceElements())
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for(auto & pi : sel.PNums())
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pi = imap[pi];
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for (int nr = 1; nr <= identifications.GetMaxNr(); nr++)
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if (identifications.GetType(nr) != Identifications::PERIODIC)
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{
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identifications.GetPairs (nr, connectednodes);
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for (auto pair : connectednodes)
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{
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auto pi0 = pair[0];
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auto pi1 = pair[1];
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if(imap[pi0].IsValid() && imap[pi1].IsValid())
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ret[i].connected_pairs.Append({imap[pi0], imap[pi1]});
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}
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}
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// ret[i].mesh.Save("surface_"+ToString(i)+".vol");
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}
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return ret;
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}
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void CloseOpenQuads( MeshingData & md)
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{
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auto & mesh = md.mesh;
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auto domain = md.domain;
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MeshingParameters & mp = md.mp;
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if(mp.only3D_domain_nr && mp.only3D_domain_nr != domain)
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return;
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int oldne;
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if (multithread.terminate)
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return;
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mesh.CalcSurfacesOfNode();
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mesh.FindOpenElements();
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if (!mesh.GetNOpenElements())
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return;
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for (int qstep = 0; qstep <= 3; qstep++)
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{
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if (qstep == 0 && !mp.try_hexes) continue;
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if (mesh.HasOpenQuads())
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{
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string rulefile = ngdir;
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const char ** rulep = NULL;
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switch (qstep)
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{
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case 0:
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rulep = hexrules;
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break;
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case 1:
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rulep = prismrules2;
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break;
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case 2: // connect pyramid to triangle
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rulep = pyramidrules2;
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break;
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case 3: // connect to vis-a-vis point
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rulep = pyramidrules;
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break;
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}
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Meshing3 meshing(rulep);
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MeshingParameters mpquad = mp;
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mpquad.giveuptol = 15;
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mpquad.baseelnp = 4;
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mpquad.starshapeclass = 1000;
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mpquad.check_impossible = qstep == 1; // for prisms only (air domain in trafo)
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for (PointIndex pi : mesh.Points().Range())
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meshing.AddPoint (mesh[pi], pi);
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for (auto pair : md.connected_pairs)
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meshing.AddConnectedPair (pair);
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for (int i = 1; i <= mesh.GetNOpenElements(); i++)
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{
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Element2d hel = mesh.OpenElement(i);
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meshing.AddBoundaryElement (hel);
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}
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oldne = mesh.GetNE();
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meshing.GenerateMesh (mesh, mpquad);
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for (int i = oldne + 1; i <= mesh.GetNE(); i++)
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mesh.VolumeElement(i).SetIndex (domain);
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(*testout)
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<< "mesh has " << mesh.GetNE() << " prism/pyramid elements" << endl;
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mesh.FindOpenElements();
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}
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}
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if (mesh.HasOpenQuads())
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{
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PrintSysError ("mesh has still open quads");
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throw NgException ("Stop meshing since too many attempts");
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// return MESHING3_GIVEUP;
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}
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}
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void MeshDomain( MeshingData & md)
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{
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auto & mesh = md.mesh;
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auto domain = md.domain;
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MeshingParameters & mp = md.mp;
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if(mp.only3D_domain_nr && mp.only3D_domain_nr != domain)
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return;
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mesh.CalcSurfacesOfNode();
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mesh.FindOpenElements(domain);
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md.meshing = make_unique<Meshing3>(nullptr);
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for (PointIndex pi : mesh.Points().Range())
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md.meshing->AddPoint (mesh[pi], pi);
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for (int i = 1; i <= mesh.GetNOpenElements(); i++)
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md.meshing->AddBoundaryElement (mesh.OpenElement(i));
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if (mp.delaunay && mesh.GetNOpenElements())
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{
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int oldne = mesh.GetNE();
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md.meshing->Delaunay (mesh, domain, mp);
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for (int i = oldne + 1; i <= mesh.GetNE(); i++)
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mesh.VolumeElement(i).SetIndex (domain);
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PrintMessage (3, mesh.GetNP(), " points, ",
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mesh.GetNE(), " elements");
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}
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// mesh.Save("before_findopenels.vol");
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// mesh.CalcSurfacesOfNode();
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// mesh.FindOpenElements(domain);
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int cntsteps = 0;
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int meshed;
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if (mesh.GetNOpenElements())
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do
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{
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if (multithread.terminate)
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break;
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mesh.FindOpenElements();
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PrintMessage (5, mesh.GetNOpenElements(), " open faces");
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GetOpenElements( mesh, domain )->Save("open_"+ToString(cntsteps)+".vol");
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cntsteps++;
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if (cntsteps > mp.maxoutersteps)
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throw NgException ("Stop meshing since too many attempts");
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PrintMessage (1, "start tetmeshing");
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Meshing3 meshing(tetrules);
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Array<PointIndex, PointIndex> glob2loc(mesh.GetNP());
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glob2loc = PointIndex::INVALID;
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for (auto sel : mesh.OpenElements() )
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{
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for(auto & pi : sel.PNums())
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{
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if(!glob2loc[pi].IsValid())
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glob2loc[pi] = meshing.AddPoint (mesh[pi], pi);
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pi = glob2loc[pi];
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}
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meshing.AddBoundaryElement (sel);
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}
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int oldne = mesh.GetNE();
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mp.giveuptol = 15 + 10 * cntsteps;
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mp.sloppy = 5;
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meshing.GenerateMesh (mesh, mp);
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for (ElementIndex ei = oldne; ei < mesh.GetNE(); ei++)
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mesh[ei].SetIndex (domain);
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mesh.CalcSurfacesOfNode();
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mesh.FindOpenElements();
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// teterrpow = 2;
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if (mesh.GetNOpenElements() != 0)
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{
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meshed = 0;
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PrintMessage (5, mesh.GetNOpenElements(), " open faces found");
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MeshOptimize3d optmesh(mp);
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const char * optstr = "mcmstmcmstmcmstmcm";
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for (size_t j = 1; j <= strlen(optstr); j++)
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{
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mesh.CalcSurfacesOfNode();
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mesh.FreeOpenElementsEnvironment(2);
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mesh.CalcSurfacesOfNode();
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switch (optstr[j-1])
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{
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case 'c': optmesh.CombineImprove(mesh, OPT_REST); break;
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case 'd': optmesh.SplitImprove(mesh, OPT_REST); break;
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case 's': optmesh.SwapImprove(mesh, OPT_REST); break;
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case 't': optmesh.SwapImprove2(mesh, OPT_REST); break;
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case 'm': mesh.ImproveMesh(mp, OPT_REST); break;
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}
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}
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mesh.FindOpenElements();
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PrintMessage (3, "Call remove problem");
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// mesh.Save("before_remove.vol");
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RemoveProblem (mesh, domain);
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// mesh.Save("after_remove.vol");
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mesh.FindOpenElements();
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}
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else
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{
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meshed = 1;
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PrintMessage (1, "Success !");
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}
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}
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while (!meshed);
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{
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PrintMessage (3, "Check subdomain ", domain, " / ", mesh.GetNDomains());
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mesh.FindOpenElements();
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bool res = (mesh.CheckConsistentBoundary() != 0);
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if (res)
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{
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// mesh.Save("output.vol");
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PrintError ("Surface mesh not consistent");
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throw NgException ("Stop meshing since surface mesh not consistent");
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}
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}
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// OptimizeVolume( md.mp, mesh );
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}
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void MeshDomain(Mesh & mesh3d, const MeshingParameters & c_mp, int k, const Identifications & identifications)
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{
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MeshingParameters mp = c_mp; // copy mp to change them here
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@ -103,13 +464,13 @@ namespace netgen
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for (int i = 1; i <= connectednodes.Size(); i++)
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meshing.AddConnectedPair (connectednodes.Get(i));
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*/
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for (int nr = 1; nr <= identifications.GetMaxNr(); nr++)
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if (identifications.GetType(nr) != Identifications::PERIODIC)
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{
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identifications.GetPairs (nr, connectednodes);
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for (auto pair : connectednodes)
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meshing.AddConnectedPair (pair);
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}
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// for (int nr = 1; nr <= identifications.GetMaxNr(); nr++)
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// if (identifications.GetType(nr) != Identifications::PERIODIC)
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// {
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// identifications.GetPairs (nr, connectednodes);
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// for (auto pair : connectednodes)
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// meshing.AddConnectedPair (pair);
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// }
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for (int i = 1; i <= mesh3d.GetNOpenElements(); i++)
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{
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@ -276,6 +637,32 @@ namespace netgen
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}
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}
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void MergeMeshes( Mesh & mesh, Array<MeshingData> & md )
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{
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// todo: optimize: count elements, alloc all memory, copy vol elements in parallel
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static Timer t("MergeMeshes"); RegionTimer rt(t);
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for(auto & m_ : md)
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{
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auto first_new_pi = m_.pmap.Range().Next();
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auto & m = m_.mesh;
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Array<PointIndex, PointIndex> pmap(m.Points().Size());
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for(auto pi : Range(PointIndex(PointIndex::BASE), first_new_pi))
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pmap[pi] = m_.pmap[pi];
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for (auto pi : Range(first_new_pi, m.Points().Range().Next()))
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pmap[pi] = mesh.AddPoint(m[pi]);
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for ( auto el : m.VolumeElements() )
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{
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for (auto i : Range(el.GetNP()))
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el[i] = pmap[el[i]];
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el.SetIndex(m_.domain);
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mesh.AddVolumeElement(el);
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}
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}
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}
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void MergeMeshes( Mesh & mesh, FlatArray<Mesh> meshes, PointIndex first_new_pi )
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{
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// todo: optimize: count elements, alloc all memory, copy vol elements in parallel
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@ -301,6 +688,48 @@ namespace netgen
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// extern double teterrpow;
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MESHING3_RESULT MeshVolume (const MeshingParameters & mp, Mesh& mesh3d)
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{
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static Timer t("MeshVolume"); RegionTimer reg(t);
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mesh3d.Compress();
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if (mp.checkoverlappingboundary)
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if (mesh3d.CheckOverlappingBoundary())
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throw NgException ("Stop meshing since boundary mesh is overlapping");
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if(mesh3d.GetNDomains()==0)
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return MESHING3_OK;
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if (!mesh3d.HasLocalHFunction()) mesh3d.CalcLocalH(mp.grading);
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auto md = DivideMesh(mesh3d, mp);
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ParallelFor( md.Range(), [&](int i)
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{
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CloseOpenQuads( md[i] );
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});
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ParallelFor( md.Range(), [&](int i)
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{
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// try {
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MeshDomain(md[i]);
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// }
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// catch( const NgException & e ) {
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// md[i].mesh.Save("error_"+ToString(i)+".vol");
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// }
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});
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MergeMeshes(mesh3d, md);
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MeshQuality3d (mesh3d);
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return MESHING3_OK;
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}
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// extern double teterrpow;
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MESHING3_RESULT MeshVolume_ori (const MeshingParameters & mp, Mesh& mesh3d)
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{
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static Timer t("MeshVolume"); RegionTimer reg(t);
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@ -134,6 +134,7 @@ void ResetStatus()
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void PushStatus(const MyStr& s)
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{
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return;
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msgstatus_stack.Append(new MyStr (s));
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SetStatMsg(s);
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threadpercent_stack.Append(0);
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@ -141,6 +142,7 @@ void PushStatus(const MyStr& s)
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void PushStatusF(const MyStr& s)
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{
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return;
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msgstatus_stack.Append(new MyStr (s));
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SetStatMsg(s);
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threadpercent_stack.Append(0);
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@ -149,6 +151,7 @@ void PushStatusF(const MyStr& s)
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void PopStatus()
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{
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return;
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if (msgstatus_stack.Size())
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{
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if (msgstatus_stack.Size() > 1)
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