mirror of
https://github.com/NGSolve/netgen.git
synced 2024-11-11 16:49:16 +05:00
753 lines
19 KiB
C++
753 lines
19 KiB
C++
#include <mystdlib.h>
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#include "meshing.hpp"
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namespace netgen
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{
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extern const char * tetrules[];
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// extern const char * tetrules2[];
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extern const char * prismrules2[];
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extern const char * pyramidrules[];
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extern const char * pyramidrules2[];
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extern const char * hexrules[];
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// extern double teterrpow;
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MESHING3_RESULT MeshVolume (const MeshingParameters & c_mp, Mesh& mesh3d)
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{
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static Timer t("MeshVolume"); RegionTimer reg(t);
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MeshingParameters mp = c_mp; // copy mp to change them here
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int oldne;
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int meshed;
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NgArray<INDEX_2> connectednodes;
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if (!mesh3d.HasLocalHFunction()) mesh3d.CalcLocalH(mp.grading);
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mesh3d.Compress();
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// mesh3d.PrintMemInfo (cout);
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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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int nonconsist = 0;
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for (int k = 1; k <= mesh3d.GetNDomains(); k++)
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{
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if(mp.only3D_domain_nr && mp.only3D_domain_nr !=k)
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continue;
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PrintMessage (3, "Check subdomain ", k, " / ", mesh3d.GetNDomains());
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mesh3d.FindOpenElements(k);
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/*
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bool res = mesh3d.CheckOverlappingBoundary();
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if (res)
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{
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PrintError ("Surface is overlapping !!");
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nonconsist = 1;
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}
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*/
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bool res = (mesh3d.CheckConsistentBoundary() != 0);
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if (res)
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{
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PrintError ("Surface mesh not consistent");
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nonconsist = 1;
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}
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}
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if (nonconsist)
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{
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PrintError ("Stop meshing since 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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double globmaxh = mp.maxh;
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for (int k = 1; k <= mesh3d.GetNDomains(); k++)
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{
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if(mp.only3D_domain_nr && mp.only3D_domain_nr !=k)
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continue;
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if (multithread.terminate)
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break;
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PrintMessage (2, "");
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PrintMessage (1, "Meshing subdomain ", k, " of ", mesh3d.GetNDomains());
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(*testout) << "Meshing subdomain " << k << endl;
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mp.maxh = min2 (globmaxh, mesh3d.MaxHDomain(k));
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mesh3d.CalcSurfacesOfNode();
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mesh3d.FindOpenElements(k);
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if (!mesh3d.GetNOpenElements())
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continue;
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Box<3> domain_bbox( Box<3>::EMPTY_BOX );
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for (SurfaceElementIndex sei = 0; sei < mesh3d.GetNSE(); sei++)
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{
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const Element2d & el = mesh3d[sei];
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if (el.IsDeleted() ) continue;
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if (mesh3d.GetFaceDescriptor(el.GetIndex()).DomainIn() == k ||
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mesh3d.GetFaceDescriptor(el.GetIndex()).DomainOut() == k)
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for (int j = 0; j < el.GetNP(); j++)
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domain_bbox.Add (mesh3d[el[j]]);
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}
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domain_bbox.Increase (0.01 * domain_bbox.Diam());
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for (int qstep = 0; qstep <= 3; qstep++)
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// for (int qstep = 0; qstep <= 0; qstep++) // for hex-filling
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{
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if (qstep == 0 && !mp.try_hexes) continue;
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// cout << "openquads = " << mesh3d.HasOpenQuads() << endl;
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if (mesh3d.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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rulefile = "/Users/joachim/gitlab/netgen/rules/hexa.rls";
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rulep = hexrules;
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break;
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case 1:
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rulefile += "/rules/prisms2.rls";
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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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rulefile += "/rules/pyramids2.rls";
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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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rulefile += "/rules/pyramids.rls";
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rulep = pyramidrules;
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break;
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}
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// Meshing3 meshing(rulefile);
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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 = mesh3d.Points().Begin(); pi < mesh3d.Points().End(); pi++)
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for (PointIndex pi : mesh3d.Points().Range())
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meshing.AddPoint (mesh3d[pi], pi);
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/*
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mesh3d.GetIdentifications().GetPairs (0, connectednodes);
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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 <= mesh3d.GetIdentifications().GetMaxNr(); nr++)
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if (mesh3d.GetIdentifications().GetType(nr) != Identifications::PERIODIC)
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{
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mesh3d.GetIdentifications().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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Element2d hel = mesh3d.OpenElement(i);
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meshing.AddBoundaryElement (hel);
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}
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oldne = mesh3d.GetNE();
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meshing.GenerateMesh (mesh3d, mpquad);
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for (int i = oldne + 1; i <= mesh3d.GetNE(); i++)
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mesh3d.VolumeElement(i).SetIndex (k);
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(*testout)
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<< "mesh has " << mesh3d.GetNE() << " prism/pyramid elements" << endl;
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mesh3d.FindOpenElements(k);
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}
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}
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if (mesh3d.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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if (mp.delaunay && mesh3d.GetNOpenElements())
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{
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Meshing3 meshing((const char**)NULL);
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mesh3d.FindOpenElements(k);
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/*
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for (PointIndex pi = mesh3d.Points().Begin(); pi < mesh3d.Points().End(); pi++)
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meshing.AddPoint (mesh3d[pi], pi);
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*/
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for (PointIndex pi : mesh3d.Points().Range())
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meshing.AddPoint (mesh3d[pi], pi);
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for (int i = 1; i <= mesh3d.GetNOpenElements(); i++)
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meshing.AddBoundaryElement (mesh3d.OpenElement(i));
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oldne = mesh3d.GetNE();
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meshing.Delaunay (mesh3d, k, mp);
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for (int i = oldne + 1; i <= mesh3d.GetNE(); i++)
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mesh3d.VolumeElement(i).SetIndex (k);
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PrintMessage (3, mesh3d.GetNP(), " points, ",
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mesh3d.GetNE(), " elements");
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}
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int cntsteps = 0;
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if (mesh3d.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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mesh3d.FindOpenElements(k);
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PrintMessage (5, mesh3d.GetNOpenElements(), " open faces");
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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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string rulefile = ngdir + "/tetra.rls";
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PrintMessage (1, "start tetmeshing");
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// Meshing3 meshing(rulefile);
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Meshing3 meshing(tetrules);
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NgArray<int, PointIndex::BASE> glob2loc(mesh3d.GetNP());
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glob2loc = -1;
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// for (PointIndex pi = mesh3d.Points().Begin(); pi < mesh3d.Points().End(); pi++)
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for (PointIndex pi : mesh3d.Points().Range())
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if (domain_bbox.IsIn (mesh3d[pi]))
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glob2loc[pi] =
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meshing.AddPoint (mesh3d[pi], pi);
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for (int i = 1; i <= mesh3d.GetNOpenElements(); i++)
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{
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Element2d hel = mesh3d.OpenElement(i);
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for (int j = 0; j < hel.GetNP(); j++)
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hel[j] = glob2loc[hel[j]];
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meshing.AddBoundaryElement (hel);
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// meshing.AddBoundaryElement (mesh3d.OpenElement(i));
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}
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oldne = mesh3d.GetNE();
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mp.giveuptol = 15 + 10 * cntsteps;
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mp.sloppy = 5;
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meshing.GenerateMesh (mesh3d, mp);
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for (ElementIndex ei = oldne; ei < mesh3d.GetNE(); ei++)
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mesh3d[ei].SetIndex (k);
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mesh3d.CalcSurfacesOfNode();
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mesh3d.FindOpenElements(k);
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// teterrpow = 2;
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if (mesh3d.GetNOpenElements() != 0)
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{
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meshed = 0;
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PrintMessage (5, mesh3d.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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mesh3d.CalcSurfacesOfNode();
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mesh3d.FreeOpenElementsEnvironment(2);
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mesh3d.CalcSurfacesOfNode();
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switch (optstr[j-1])
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{
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case 'c': optmesh.CombineImprove(mesh3d, OPT_REST); break;
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case 'd': optmesh.SplitImprove(mesh3d, OPT_REST); break;
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case 's': optmesh.SwapImprove(mesh3d, OPT_REST); break;
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case 't': optmesh.SwapImprove2(mesh3d, OPT_REST); break;
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case 'm': mesh3d.ImproveMesh(mp, OPT_REST); break;
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}
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}
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mesh3d.FindOpenElements(k);
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PrintMessage (3, "Call remove problem");
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RemoveProblem (mesh3d, k);
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mesh3d.FindOpenElements(k);
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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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PrintMessage (1, mesh3d.GetNP(), " points, ",
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mesh3d.GetNE(), " elements");
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}
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mp.maxh = globmaxh;
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MeshQuality3d (mesh3d);
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return MESHING3_OK;
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}
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/*
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MESHING3_RESULT MeshVolumeOld (MeshingParameters & mp, Mesh& mesh3d)
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{
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int i, k, oldne;
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int meshed;
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int cntsteps;
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PlotStatistics3d * pstat;
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if (globflags.GetNumFlag("silentflag", 1) <= 2)
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pstat = new XPlotStatistics3d;
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else
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pstat = new TerminalPlotStatistics3d;
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cntsteps = 0;
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do
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{
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cntsteps++;
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if (cntsteps > mp.maxoutersteps)
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{
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return MESHING3_OUTERSTEPSEXCEEDED;
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}
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int noldp = mesh3d.GetNP();
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if ( (cntsteps == 1) && globflags.GetDefineFlag ("delaunay"))
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{
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cntsteps ++;
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mesh3d.CalcSurfacesOfNode();
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for (k = 1; k <= mesh3d.GetNDomains(); k++)
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{
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Meshing3 meshing(NULL, pstat);
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mesh3d.FindOpenElements(k);
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for (i = 1; i <= noldp; i++)
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meshing.AddPoint (mesh3d.Point(i), i);
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for (i = 1; i <= mesh3d.GetNOpenElements(); i++)
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{
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if (mesh3d.OpenElement(i).GetIndex() == k)
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meshing.AddBoundaryElement (mesh3d.OpenElement(i));
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}
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oldne = mesh3d.GetNE();
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if (globflags.GetDefineFlag ("blockfill"))
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{
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if (!globflags.GetDefineFlag ("localh"))
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meshing.BlockFill
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(mesh3d, mp.h * globflags.GetNumFlag ("relblockfillh", 1));
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else
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meshing.BlockFillLocalH (mesh3d);
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}
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MeshingParameters mpd;
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meshing.Delaunay (mesh3d, mpd);
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for (i = oldne + 1; i <= mesh3d.GetNE(); i++)
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mesh3d.VolumeElement(i).SetIndex (k);
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}
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}
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noldp = mesh3d.GetNP();
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mesh3d.CalcSurfacesOfNode();
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mesh3d.FindOpenElements();
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for (k = 1; k <= mesh3d.GetNDomains(); k++)
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{
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Meshing3 meshing(globflags.GetStringFlag ("rules3d", NULL), pstat);
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Point3d pmin, pmax;
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mesh3d.GetBox (pmin, pmax, k);
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rot.SetCenter (Center (pmin, pmax));
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for (i = 1; i <= noldp; i++)
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meshing.AddPoint (mesh3d.Point(i), i);
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for (i = 1; i <= mesh3d.GetNOpenElements(); i++)
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{
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if (mesh3d.OpenElement(i).GetIndex() == k)
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meshing.AddBoundaryElement (mesh3d.OpenElement(i));
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}
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oldne = mesh3d.GetNE();
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if ( (cntsteps == 1) && globflags.GetDefineFlag ("blockfill"))
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{
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if (!globflags.GetDefineFlag ("localh"))
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{
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meshing.BlockFill
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(mesh3d,
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mp.h * globflags.GetNumFlag ("relblockfillh", 1));
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}
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else
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{
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meshing.BlockFillLocalH (mesh3d);
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}
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}
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mp.giveuptol = int(globflags.GetNumFlag ("giveuptol", 15));
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meshing.GenerateMesh (mesh3d, mp);
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for (i = oldne + 1; i <= mesh3d.GetNE(); i++)
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mesh3d.VolumeElement(i).SetIndex (k);
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}
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mesh3d.CalcSurfacesOfNode();
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mesh3d.FindOpenElements();
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teterrpow = 2;
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if (mesh3d.GetNOpenElements() != 0)
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{
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meshed = 0;
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(*mycout) << "Open elements found, old" << endl;
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const char * optstr = "mcmcmcmcm";
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int j;
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for (j = 1; j <= strlen(optstr); j++)
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switch (optstr[j-1])
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{
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case 'c': mesh3d.CombineImprove(); break;
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case 'd': mesh3d.SplitImprove(); break;
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case 's': mesh3d.SwapImprove(); break;
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case 'm': mesh3d.ImproveMesh(2); break;
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}
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(*mycout) << "Call remove" << endl;
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RemoveProblem (mesh3d);
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(*mycout) << "Problem removed" << endl;
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}
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else
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meshed = 1;
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}
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while (!meshed);
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MeshQuality3d (mesh3d);
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return MESHING3_OK;
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}
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*/
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/*
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MESHING3_RESULT MeshMixedVolume(MeshingParameters & mp, Mesh& mesh3d)
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{
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int i, j;
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MESHING3_RESULT res;
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Point3d pmin, pmax;
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mp.giveuptol = 10;
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mp.baseelnp = 4;
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mp.starshapeclass = 100;
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// TerminalPlotStatistics3d pstat;
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Meshing3 meshing1("pyramids.rls");
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for (i = 1; i <= mesh3d.GetNP(); i++)
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meshing1.AddPoint (mesh3d.Point(i), i);
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mesh3d.FindOpenElements();
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for (i = 1; i <= mesh3d.GetNOpenElements(); i++)
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if (mesh3d.OpenElement(i).GetIndex() == 1)
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meshing1.AddBoundaryElement (mesh3d.OpenElement(i));
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res = meshing1.GenerateMesh (mesh3d, mp);
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mesh3d.GetBox (pmin, pmax);
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PrintMessage (1, "Mesh pyramids, res = ", res);
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if (res)
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exit (1);
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for (i = 1; i <= mesh3d.GetNE(); i++)
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mesh3d.VolumeElement(i).SetIndex (1);
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// do delaunay
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mp.baseelnp = 0;
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mp.starshapeclass = 5;
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Meshing3 meshing2(NULL);
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for (i = 1; i <= mesh3d.GetNP(); i++)
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meshing2.AddPoint (mesh3d.Point(i), i);
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mesh3d.FindOpenElements();
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for (i = 1; i <= mesh3d.GetNOpenElements(); i++)
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if (mesh3d.OpenElement(i).GetIndex() == 1)
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meshing2.AddBoundaryElement (mesh3d.OpenElement(i));
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MeshingParameters mpd;
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meshing2.Delaunay (mesh3d, mpd);
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for (i = 1; i <= mesh3d.GetNE(); i++)
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mesh3d.VolumeElement(i).SetIndex (1);
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mp.baseelnp = 0;
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mp.giveuptol = 10;
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for (int trials = 1; trials <= 50; trials++)
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{
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if (multithread.terminate)
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return MESHING3_TERMINATE;
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Meshing3 meshing3("tetra.rls");
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for (i = 1; i <= mesh3d.GetNP(); i++)
|
||
meshing3.AddPoint (mesh3d.Point(i), i);
|
||
|
||
mesh3d.FindOpenElements();
|
||
for (i = 1; i <= mesh3d.GetNOpenElements(); i++)
|
||
if (mesh3d.OpenElement(i).GetIndex() == 1)
|
||
meshing3.AddBoundaryElement (mesh3d.OpenElement(i));
|
||
|
||
if (trials > 1)
|
||
CheckSurfaceMesh2 (mesh3d);
|
||
res = meshing3.GenerateMesh (mesh3d, mp);
|
||
|
||
for (i = 1; i <= mesh3d.GetNE(); i++)
|
||
mesh3d.VolumeElement(i).SetIndex (1);
|
||
|
||
if (res == 0) break;
|
||
|
||
|
||
|
||
for (i = 1; i <= mesh3d.GetNE(); i++)
|
||
{
|
||
const Element & el = mesh3d.VolumeElement(i);
|
||
if (el.GetNP() != 4)
|
||
{
|
||
for (j = 1; j <= el.GetNP(); j++)
|
||
mesh3d.AddLockedPoint (el.PNum(j));
|
||
}
|
||
}
|
||
|
||
mesh3d.CalcSurfacesOfNode();
|
||
mesh3d.FindOpenElements();
|
||
|
||
MeshOptimize3d optmesh;
|
||
|
||
teterrpow = 2;
|
||
const char * optstr = "mcmcmcmcm";
|
||
for (j = 1; j <= strlen(optstr); j++)
|
||
switch (optstr[j-1])
|
||
{
|
||
case 'c': optmesh.CombineImprove(mesh3d, OPT_REST); break;
|
||
case 'd': optmesh.SplitImprove(mesh3d); break;
|
||
case 's': optmesh.SwapImprove(mesh3d); break;
|
||
case 'm': mesh3d.ImproveMesh(); break;
|
||
}
|
||
|
||
RemoveProblem (mesh3d);
|
||
}
|
||
|
||
|
||
PrintMessage (1, "Meshing tets, res = ", res);
|
||
if (res)
|
||
{
|
||
mesh3d.FindOpenElements();
|
||
PrintSysError (1, "Open elements: ", mesh3d.GetNOpenElements());
|
||
exit (1);
|
||
}
|
||
|
||
|
||
|
||
for (i = 1; i <= mesh3d.GetNE(); i++)
|
||
{
|
||
const Element & el = mesh3d.VolumeElement(i);
|
||
if (el.GetNP() != 4)
|
||
{
|
||
for (j = 1; j <= el.GetNP(); j++)
|
||
mesh3d.AddLockedPoint (el.PNum(j));
|
||
}
|
||
}
|
||
|
||
mesh3d.CalcSurfacesOfNode();
|
||
mesh3d.FindOpenElements();
|
||
|
||
MeshOptimize3d optmesh;
|
||
|
||
teterrpow = 2;
|
||
const char * optstr = "mcmcmcmcm";
|
||
for (j = 1; j <= strlen(optstr); j++)
|
||
switch (optstr[j-1])
|
||
{
|
||
case 'c': optmesh.CombineImprove(mesh3d, OPT_REST); break;
|
||
case 'd': optmesh.SplitImprove(mesh3d); break;
|
||
case 's': optmesh.SwapImprove(mesh3d); break;
|
||
case 'm': mesh3d.ImproveMesh(); break;
|
||
}
|
||
|
||
|
||
return MESHING3_OK;
|
||
}
|
||
*/
|
||
|
||
|
||
|
||
|
||
|
||
|
||
MESHING3_RESULT OptimizeVolume (const MeshingParameters & mp,
|
||
Mesh & mesh3d)
|
||
// const CSGeometry * geometry)
|
||
{
|
||
static Timer t("OptimizeVolume"); RegionTimer reg(t);
|
||
RegionTaskManager rtm(mp.parallel_meshing ? mp.nthreads : 0);
|
||
const char* savetask = multithread.task;
|
||
multithread.task = "Optimize Volume";
|
||
|
||
int i;
|
||
|
||
PrintMessage (1, "Volume Optimization");
|
||
|
||
/*
|
||
if (!mesh3d.PureTetMesh())
|
||
return MESHING3_OK;
|
||
*/
|
||
|
||
// (*mycout) << "optstring = " << mp.optimize3d << endl;
|
||
/*
|
||
const char * optstr = globflags.GetStringFlag ("optimize3d", "cmh");
|
||
int optsteps = int (globflags.GetNumFlag ("optsteps3d", 2));
|
||
*/
|
||
|
||
mesh3d.CalcSurfacesOfNode();
|
||
for (auto i : Range(mp.optsteps3d))
|
||
{
|
||
if (multithread.terminate)
|
||
break;
|
||
|
||
MeshOptimize3d optmesh(mp);
|
||
|
||
// teterrpow = mp.opterrpow;
|
||
// for (size_t j = 1; j <= strlen(mp.optimize3d); j++)
|
||
for (auto j : Range(mp.optimize3d.size()))
|
||
{
|
||
multithread.percent = 100.* (double(j)/mp.optimize3d.size() + i)/mp.optsteps3d;
|
||
if (multithread.terminate)
|
||
break;
|
||
|
||
switch (mp.optimize3d[j])
|
||
{
|
||
case 'c': optmesh.CombineImprove(mesh3d, OPT_REST); break;
|
||
case 'd': optmesh.SplitImprove(mesh3d); break;
|
||
case 'D': optmesh.SplitImprove2(mesh3d, OPT_QUALITY); break;
|
||
case 's': optmesh.SwapImprove(mesh3d); break;
|
||
// case 'u': optmesh.SwapImproveSurface(mesh3d); break;
|
||
case 't': optmesh.SwapImprove2(mesh3d); break;
|
||
#ifdef SOLIDGEOM
|
||
case 'm': mesh3d.ImproveMesh(*geometry); break;
|
||
case 'M': mesh3d.ImproveMesh(*geometry); break;
|
||
#else
|
||
case 'm': mesh3d.ImproveMesh(mp); break;
|
||
case 'M': mesh3d.ImproveMesh(mp); break;
|
||
#endif
|
||
case 'j': mesh3d.ImproveMeshJacobian(mp); break;
|
||
}
|
||
}
|
||
// mesh3d.mglevels = 1;
|
||
MeshQuality3d (mesh3d);
|
||
}
|
||
|
||
multithread.task = savetask;
|
||
return MESHING3_OK;
|
||
}
|
||
|
||
|
||
|
||
|
||
void RemoveIllegalElements (Mesh & mesh3d)
|
||
{
|
||
static Timer t("RemoveIllegalElements"); RegionTimer reg(t);
|
||
|
||
int it = 10;
|
||
int nillegal, oldn;
|
||
|
||
PrintMessage (1, "Remove Illegal Elements");
|
||
// return, if non-pure tet-mesh
|
||
/*
|
||
if (!mesh3d.PureTetMesh())
|
||
return;
|
||
*/
|
||
mesh3d.CalcSurfacesOfNode();
|
||
|
||
nillegal = mesh3d.MarkIllegalElements();
|
||
|
||
MeshingParameters dummymp;
|
||
MeshOptimize3d optmesh(dummymp);
|
||
while (nillegal && (it--) > 0)
|
||
{
|
||
if (multithread.terminate)
|
||
break;
|
||
|
||
PrintMessage (5, nillegal, " illegal tets");
|
||
optmesh.SplitImprove (mesh3d, OPT_LEGAL);
|
||
|
||
mesh3d.MarkIllegalElements(); // test
|
||
optmesh.SwapImprove (mesh3d, OPT_LEGAL);
|
||
mesh3d.MarkIllegalElements(); // test
|
||
optmesh.SwapImprove2 (mesh3d, OPT_LEGAL);
|
||
|
||
oldn = nillegal;
|
||
nillegal = mesh3d.MarkIllegalElements();
|
||
|
||
if (oldn != nillegal)
|
||
it = 10;
|
||
}
|
||
PrintMessage (5, nillegal, " illegal tets");
|
||
}
|
||
}
|