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Merge branch 'identify_periodic' into 'master'

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Identify periodic

See merge request jschoeberl/netgen!316
This commit is contained in:
Joachim Schöberl 2020-03-17 15:09:05 +00:00
commit 019d95c5f6
3 changed files with 49 additions and 0 deletions
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40
libsrc/meshing/meshclass.cpp
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@ -1,5 +1,6 @@
#include <mystdlib.h>
#include <atomic>
#include <set>
#include "meshing.hpp"
#ifdef NG_PYTHON
@ -6112,7 +6113,46 @@ namespace netgen
// }
// #endif
int Mesh::IdentifyPeriodicBoundaries(const string &s1,
const string &s2,
const Transformation<3> &mapping)
{
auto nr = ident->GetMaxNr() + 1;
ident->SetType(nr, Identifications::PERIODIC);
double lami[4];
set<int> identified_points;
Point3d pmin, pmax;
GetBox(pmin, pmax);
auto eps = 1e-8 * (pmax-pmin).Length();
for(const auto& se : surfelements)
{
if(GetBCName(se.index-1) != s1)
continue;
for(const auto& pi : se.PNums())
{
if(identified_points.find(pi) != identified_points.end())
continue;
auto pt = (*this)[pi];
auto mapped_pt = mapping(pt);
auto other_nr = GetElementOfPoint(mapped_pt, lami, true);
int index = -1;
auto other_el = VolumeElement(other_nr);
for(auto i : Range(4))
if((mapped_pt - (*this)[other_el.PNums()[i]]).Length() < eps)
{
index = i;
break;
}
if(index == -1)
throw Exception("Did not find mapped point, are you sure your mesh is periodic?");
auto other_pi = other_el.PNums()[index];
identified_points.insert(pi);
ident->Add(pi, other_pi, nr);
}
}
return nr;
}
void Mesh :: InitPointCurve(double red, double green, double blue) const
{

4
libsrc/meshing/meshclass.hpp
View File

@ -710,6 +710,10 @@ namespace netgen
FaceDescriptor & GetFaceDescriptor (int i)
{ return facedecoding.Elem(i); }
int IdentifyPeriodicBoundaries(const string& s1,
const string& s2,
const Transformation<3>& mapping);
// #ifdef NONE
// /*
// Identify points pi1 and pi2, due to

5
libsrc/meshing/python_mesh.cpp
View File

@ -855,6 +855,11 @@ DLL_HEADER void ExportNetgenMeshing(py::module &m)
py::arg("pid2"),
py::arg("identnr"),
py::arg("type"))
.def("IdentifyPeriodicBoundaries", &Mesh::IdentifyPeriodicBoundaries)
.def("GetNrIdentifications", [](Mesh& self)
{
return self.GetIdentifications().GetMaxNr();
})
.def ("CalcLocalH", &Mesh::CalcLocalH)
.def ("SetMaxHDomain", [] (Mesh& self, py::list maxhlist)
{