// generates volume mesh from surface mesh
DLL_HEADER Ng_Result Ng_GenerateVolumeMesh (Ng_Mesh * mesh, Ng_Meshing_Parameters * mp)
{
Mesh * m = (Mesh*)mesh;
MeshingParameters mparam;
mparam.maxh = mp->maxh;
mparam.meshsizefilename = mp->meshsize_filename;
m->CalcLocalH();
MeshVolume (mparam, *m);
RemoveIllegalElements (*m);
OptimizeVolume (mparam, *m);
return NG_OK;
}
// Generates volume mesh from an existing surface mesh
DLL_HEADER Ng_Result Ng_GenerateVolumeMesh (Ng_Mesh * mesh, Ng_Meshing_Parameters * mp)
{
Mesh * m = (Mesh*)mesh;
// Philippose - 30/08/2009
// Do not locally re-define "mparam" here... "mparam" is a global
// object
//MeshingParameters mparam;
mp->Transfer_Parameters();
m->CalcLocalH();
MeshVolume (mparam, *m);
RemoveIllegalElements (*m);
OptimizeVolume (mparam, *m);
return NG_OK;
}
// Generates volume mesh from an existing surface mesh
DLL_HEADER Ng_Result Ng_GenerateVolumeMesh (Ng_Mesh * mesh, Ng_Meshing_Parameters * mp)
{
Mesh * m = (Mesh*)mesh;
// Philippose - 30/08/2009
// Do not locally re-define "mparam" here... "mparam" is a global
// object
//MeshingParameters mparam;
mparam.maxh = mp->maxh;
mparam.meshsizefilename = mp->meshsize_filename;
double fineness = min(1., max(0., mp->fineness));
mparam.curvaturesafety = 0.3 + 5 * fineness;
mparam.segmentsperedge = 0.3 + 5 * fineness;
m->CalcLocalH();
MeshVolume (mparam, *m);
RemoveIllegalElements (*m);
OptimizeVolume (mparam, *m);
return NG_OK;
}
// extern double teterrpow;
MESHING3_RESULT MeshVolume (MeshingParameters & mp, Mesh& mesh3d)
{
int oldne;
int meshed;
Array<INDEX_2> connectednodes;
if (&mesh3d.LocalHFunction() == NULL) mesh3d.CalcLocalH(mp.grading);
mesh3d.Compress();
// mesh3d.PrintMemInfo (cout);
if (mp.checkoverlappingboundary)
if (mesh3d.CheckOverlappingBoundary())
throw NgException ("Stop meshing since boundary mesh is overlapping");
int nonconsist = 0;
for (int k = 1; k <= mesh3d.GetNDomains(); k++)
{
PrintMessage (3, "Check subdomain ", k, " / ", mesh3d.GetNDomains());
mesh3d.FindOpenElements(k);
/*
bool res = mesh3d.CheckOverlappingBoundary();
if (res)
{
PrintError ("Surface is overlapping !!");
nonconsist = 1;
}
*/
bool res = (mesh3d.CheckConsistentBoundary() != 0);
if (res)
{
PrintError ("Surface mesh not consistent");
nonconsist = 1;
}
}
if (nonconsist)
{
PrintError ("Stop meshing since surface mesh not consistent");
throw NgException ("Stop meshing since surface mesh not consistent");
}
double globmaxh = mp.maxh;
for (int k = 1; k <= mesh3d.GetNDomains(); k++)
{
if (multithread.terminate)
break;
PrintMessage (2, "");
PrintMessage (1, "Meshing subdomain ", k, " of ", mesh3d.GetNDomains());
(*testout) << "Meshing subdomain " << k << endl;
mp.maxh = min2 (globmaxh, mesh3d.MaxHDomain(k));
mesh3d.CalcSurfacesOfNode();
mesh3d.FindOpenElements(k);
if (!mesh3d.GetNOpenElements())
continue;
Box<3> domain_bbox( Box<3>::EMPTY_BOX );
for (SurfaceElementIndex sei = 0; sei < mesh3d.GetNSE(); sei++)
{
const Element2d & el = mesh3d[sei];
if (el.IsDeleted() ) continue;
if (mesh3d.GetFaceDescriptor(el.GetIndex()).DomainIn() == k ||
mesh3d.GetFaceDescriptor(el.GetIndex()).DomainOut() == k)
for (int j = 0; j < el.GetNP(); j++)
domain_bbox.Add (mesh3d[el[j]]);
}
domain_bbox.Increase (0.01 * domain_bbox.Diam());
for (int qstep = 1; qstep <= 3; qstep++)
{
// cout << "openquads = " << mesh3d.HasOpenQuads() << endl;
if (mesh3d.HasOpenQuads())
{
string rulefile = ngdir;
const char ** rulep = NULL;
switch (qstep)
{
case 1:
rulefile += "/rules/prisms2.rls";
rulep = prismrules2;
break;
case 2: // connect pyramid to triangle
rulefile += "/rules/pyramids2.rls";
rulep = pyramidrules2;
break;
case 3: // connect to vis-a-vis point
rulefile += "/rules/pyramids.rls";
rulep = pyramidrules;
break;
}
// Meshing3 meshing(rulefile);
Meshing3 meshing(rulep);
MeshingParameters mpquad = mp;
mpquad.giveuptol = 15;
mpquad.baseelnp = 4;
mpquad.starshapeclass = 1000;
mpquad.check_impossible = qstep == 1; // for prisms only (air domain in trafo)
for (PointIndex pi = mesh3d.Points().Begin(); pi < mesh3d.Points().End(); pi++)
meshing.AddPoint (mesh3d[pi], pi);
mesh3d.GetIdentifications().GetPairs (0, connectednodes);
for (int i = 1; i <= connectednodes.Size(); i++)
meshing.AddConnectedPair (connectednodes.Get(i));
for (int i = 1; i <= mesh3d.GetNOpenElements(); i++)
{
Element2d hel = mesh3d.OpenElement(i);
meshing.AddBoundaryElement (hel);
}
oldne = mesh3d.GetNE();
meshing.GenerateMesh (mesh3d, mpquad);
for (int i = oldne + 1; i <= mesh3d.GetNE(); i++)
mesh3d.VolumeElement(i).SetIndex (k);
(*testout)
<< "mesh has " << mesh3d.GetNE() << " prism/pyramid elements" << endl;
mesh3d.FindOpenElements(k);
}
}
if (mesh3d.HasOpenQuads())
{
PrintSysError ("mesh has still open quads");
throw NgException ("Stop meshing since too many attempts");
// return MESHING3_GIVEUP;
}
if (mp.delaunay && mesh3d.GetNOpenElements())
{
Meshing3 meshing((const char**)NULL);
mesh3d.FindOpenElements(k);
/*
for (PointIndex pi = mesh3d.Points().Begin(); pi < mesh3d.Points().End(); pi++)
meshing.AddPoint (mesh3d[pi], pi);
*/
for (PointIndex pi : mesh3d.Points().Range())
meshing.AddPoint (mesh3d[pi], pi);
for (int i = 1; i <= mesh3d.GetNOpenElements(); i++)
meshing.AddBoundaryElement (mesh3d.OpenElement(i));
oldne = mesh3d.GetNE();
meshing.Delaunay (mesh3d, k, mp);
for (int i = oldne + 1; i <= mesh3d.GetNE(); i++)
mesh3d.VolumeElement(i).SetIndex (k);
PrintMessage (3, mesh3d.GetNP(), " points, ",
mesh3d.GetNE(), " elements");
}
int cntsteps = 0;
if (mesh3d.GetNOpenElements())
do
{
if (multithread.terminate)
break;
mesh3d.FindOpenElements(k);
PrintMessage (5, mesh3d.GetNOpenElements(), " open faces");
cntsteps++;
if (cntsteps > mp.maxoutersteps)
throw NgException ("Stop meshing since too many attempts");
string rulefile = ngdir + "/tetra.rls";
PrintMessage (1, "start tetmeshing");
// Meshing3 meshing(rulefile);
Meshing3 meshing(tetrules);
Array<int, PointIndex::BASE> glob2loc(mesh3d.GetNP());
glob2loc = -1;
for (PointIndex pi = mesh3d.Points().Begin(); pi < mesh3d.Points().End(); pi++)
if (domain_bbox.IsIn (mesh3d[pi]))
glob2loc[pi] =
meshing.AddPoint (mesh3d[pi], pi);
for (int i = 1; i <= mesh3d.GetNOpenElements(); i++)
{
Element2d hel = mesh3d.OpenElement(i);
for (int j = 0; j < hel.GetNP(); j++)
hel[j] = glob2loc[hel[j]];
meshing.AddBoundaryElement (hel);
// meshing.AddBoundaryElement (mesh3d.OpenElement(i));
}
oldne = mesh3d.GetNE();
mp.giveuptol = 15 + 10 * cntsteps;
mp.sloppy = 5;
meshing.GenerateMesh (mesh3d, mp);
for (ElementIndex ei = oldne; ei < mesh3d.GetNE(); ei++)
mesh3d[ei].SetIndex (k);
mesh3d.CalcSurfacesOfNode();
mesh3d.FindOpenElements(k);
// teterrpow = 2;
if (mesh3d.GetNOpenElements() != 0)
{
meshed = 0;
PrintMessage (5, mesh3d.GetNOpenElements(), " open faces found");
MeshOptimize3d optmesh(mp);
const char * optstr = "mcmstmcmstmcmstmcm";
for (size_t j = 1; j <= strlen(optstr); j++)
{
mesh3d.CalcSurfacesOfNode();
mesh3d.FreeOpenElementsEnvironment(2);
mesh3d.CalcSurfacesOfNode();
switch (optstr[j-1])
{
case 'c': optmesh.CombineImprove(mesh3d, OPT_REST); break;
case 'd': optmesh.SplitImprove(mesh3d, OPT_REST); break;
case 's': optmesh.SwapImprove(mesh3d, OPT_REST); break;
case 't': optmesh.SwapImprove2(mesh3d, OPT_REST); break;
case 'm': mesh3d.ImproveMesh(mp, OPT_REST); break;
}
}
mesh3d.FindOpenElements(k);
PrintMessage (3, "Call remove problem");
RemoveProblem (mesh3d, k);
mesh3d.FindOpenElements(k);
}
else
{
meshed = 1;
PrintMessage (1, "Success !");
}
}
while (!meshed);
PrintMessage (1, mesh3d.GetNP(), " points, ",
mesh3d.GetNE(), " elements");
}
mp.maxh = globmaxh;
MeshQuality3d (mesh3d);
return MESHING3_OK;
}