mirror of
https://github.com/NGSolve/netgen.git
synced 2024-11-12 00:59:16 +05:00
655 lines
25 KiB
C++
655 lines
25 KiB
C++
#ifdef NG_PYTHON
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#include <../general/ngpython.hpp>
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#include <mystdlib.h>
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#include "meshing.hpp"
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#include <csg.hpp>
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#include <geometry2d.hpp>
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#include <../interface/writeuser.hpp>
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using namespace netgen;
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namespace netgen
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{
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extern shared_ptr<NetgenGeometry> ng_geometry;
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}
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template <typename T, int BASE = 0, typename TIND = int>
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void ExportArray (py::module &m)
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{
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using TA = Array<T,BASE,TIND>;
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string name = string("Array_") + typeid(T).name();
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py::class_<Array<T,BASE,TIND>>(m, name.c_str())
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.def ("__len__", [] ( Array<T,BASE,TIND> &self ) { return self.Size(); } )
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.def ("__getitem__",
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FunctionPointer ([](Array<T,BASE,TIND> & self, TIND i) -> T&
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{
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if (i < BASE || i >= BASE+self.Size())
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throw py::index_error();
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return self[i];
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}),
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py::return_value_policy::reference)
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.def("__iter__", [] ( TA & self) {
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return py::make_iterator (self.begin(),self.end());
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}, py::keep_alive<0,1>()) // keep array alive while iterator is used
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;
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}
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void TranslateException (const NgException & ex)
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{
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string err = string("Netgen exception: ")+ex.What();
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PyErr_SetString(PyExc_RuntimeError, err.c_str());
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}
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DLL_HEADER void ExportNetgenMeshing(py::module &m)
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{
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py::class_<PointIndex>(m, "PointId")
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.def(py::init<int>())
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.def("__repr__", &ToString<PointIndex>)
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.def("__str__", &ToString<PointIndex>)
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.def_property_readonly("nr", &PointIndex::operator int)
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.def("__eq__" , FunctionPointer( [](PointIndex &self, PointIndex &other)
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{ return static_cast<int>(self)==static_cast<int>(other); }) )
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.def("__hash__" , FunctionPointer( [](PointIndex &self ) { return static_cast<int>(self); }) )
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;
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py::class_<ElementIndex>(m, "ElementId3D")
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.def(py::init<int>())
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.def("__repr__", &ToString<ElementIndex>)
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.def("__str__", &ToString<ElementIndex>)
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.def_property_readonly("nr", &ElementIndex::operator int)
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.def("__eq__" , FunctionPointer( [](ElementIndex &self, ElementIndex &other)
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{ return static_cast<int>(self)==static_cast<int>(other); }) )
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.def("__hash__" , FunctionPointer( [](ElementIndex &self ) { return static_cast<int>(self); }) )
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;
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py::class_<SurfaceElementIndex>(m, "ElementId2D")
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.def(py::init<int>())
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.def("__repr__", &ToString<SurfaceElementIndex>)
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.def("__str__", &ToString<SurfaceElementIndex>)
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.def_property_readonly("nr", &SurfaceElementIndex::operator int)
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.def("__eq__" , FunctionPointer( [](SurfaceElementIndex &self, SurfaceElementIndex &other)
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{ return static_cast<int>(self)==static_cast<int>(other); }) )
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.def("__hash__" , FunctionPointer( [](SurfaceElementIndex &self ) { return static_cast<int>(self); }) )
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;
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py::class_<SegmentIndex>(m, "ElementId1D")
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.def(py::init<int>())
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.def("__repr__", &ToString<SegmentIndex>)
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.def("__str__", &ToString<SegmentIndex>)
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.def_property_readonly("nr", &SegmentIndex::operator int)
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.def("__eq__" , FunctionPointer( [](SegmentIndex &self, SegmentIndex &other)
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{ return static_cast<int>(self)==static_cast<int>(other); }) )
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.def("__hash__" , FunctionPointer( [](SegmentIndex &self ) { return static_cast<int>(self); }) )
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;
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/*
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py::class_<Point<3>> ("Point")
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.def(py::init<double,double,double>())
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;
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*/
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py::class_<MeshPoint /* ,py::bases<Point<3>> */ >(m, "MeshPoint")
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.def(py::init<Point<3>>())
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.def("__str__", &ToString<MeshPoint>)
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.def("__repr__", &ToString<MeshPoint>)
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.def_property_readonly("p", FunctionPointer([](const MeshPoint & self)
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{
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py::list l;
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l.append ( py::cast(self[0]) );
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l.append ( py::cast(self[1]) );
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l.append ( py::cast(self[2]) );
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return py::tuple(l);
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}))
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.def("__getitem__", FunctionPointer([](const MeshPoint & self, int index) {
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if(index<0 || index>2)
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throw py::index_error();
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return self[index];
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}))
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;
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py::class_<Element>(m, "Element3D")
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.def("__init__", [](Element *instance, int index, py::list vertices)
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{
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if (py::len(vertices) == 4)
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{
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new (instance) Element(TET);
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for (int i = 0; i < 4; i++)
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(*instance)[i] = py::extract<PointIndex>(vertices[i])();
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instance->SetIndex(index);
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}
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else if (py::len(vertices) == 6)
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{
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new (instance) Element(PRISM);
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for (int i = 0; i < 6; i++)
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(*instance)[i] = py::extract<PointIndex>(vertices[i])();
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instance->SetIndex(index);
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}
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else if (py::len(vertices) == 8)
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{
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new (instance) Element(HEX);
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for (int i = 0; i < 8; i++)
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(*instance)[i] = py::extract<PointIndex>(vertices[i])();
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instance->SetIndex(index);
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}
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else
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throw NgException ("cannot create element");
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},
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py::arg("index")=1,py::arg("vertices"),
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"create volume element"
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)
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.def("__repr__", &ToString<Element>)
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.def_property("index", &Element::GetIndex, &Element::SetIndex)
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.def_property_readonly("vertices",
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FunctionPointer ([](const Element & self) -> py::list
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{
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py::list li;
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for (int i = 0; i < self.GetNV(); i++)
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li.append (py::cast(self[i]));
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return li;
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}))
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;
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py::class_<Element2d>(m, "Element2D")
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.def("__init__",
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[](Element2d *instance, int index, py::list vertices)
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{
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if (py::len(vertices) == 3)
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{
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new (instance) Element2d(TRIG);
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for (int i = 0; i < 3; i++)
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(*instance)[i] = py::extract<PointIndex>(vertices[i])();
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instance->SetIndex(index);
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}
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else
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{
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new (instance) Element2d(QUAD);
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for (int i = 0; i < 4; i++)
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(*instance)[i] = py::extract<PointIndex>(vertices[i])();
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instance->SetIndex(index);
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}
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},
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py::arg("index")=1,py::arg("vertices"),
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"create surface element"
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)
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.def_property("index", &Element2d::GetIndex, &Element2d::SetIndex)
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.def_property_readonly("vertices",
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FunctionPointer([](const Element2d & self) -> py::list
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{
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py::list li;
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for (int i = 0; i < self.GetNV(); i++)
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li.append(py::cast(self[i]));
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return li;
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}))
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;
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py::class_<Segment>(m, "Element1D")
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.def("__init__",
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[](Segment *instance, py::list vertices, py::list surfaces, int index)
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{
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new (instance) Segment();
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for (int i = 0; i < 2; i++)
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(*instance)[i] = py::extract<PointIndex>(vertices[i])();
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instance -> si = index;
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// needed for codim2 in 3d
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instance -> edgenr = index;
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if (len(surfaces))
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{
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instance->surfnr1 = py::extract<int>(surfaces[0])();
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instance->surfnr2 = py::extract<int>(surfaces[1])();
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}
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},
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py::arg("vertices"),
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py::arg("surfaces")=py::list(),
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py::arg("index")=1,
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"create segment element"
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)
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.def("__repr__", &ToString<Segment>)
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.def_property_readonly("vertices",
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FunctionPointer ([](const Segment & self) -> py::list
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{
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py::list li;
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for (int i = 0; i < 2; i++)
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li.append (py::cast(self[i]));
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return li;
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}))
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.def_property_readonly("surfaces",
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FunctionPointer ([](const Segment & self) -> py::list
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{
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py::list li;
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li.append (py::cast(self.surfnr1));
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li.append (py::cast(self.surfnr2));
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return li;
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}))
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.def_property_readonly("index", FunctionPointer([](const Segment &self) -> size_t
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{
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return self.si;
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}))
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.def_property_readonly("edgenr", FunctionPointer([](const Segment & self) -> size_t
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{
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return self.edgenr;
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}))
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;
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py::class_<Element0d>(m, "Element0D")
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.def("__init__",
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[](Element0d *instance, PointIndex vertex, int index)
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{
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new (instance) Element0d;
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instance->pnum = vertex;
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instance->index = index;
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},
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py::arg("vertex"),
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py::arg("index")=1,
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"create point element"
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)
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.def("__repr__", &ToString<Element0d>)
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.def_property_readonly("vertices",
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FunctionPointer ([](const Element0d & self) -> py::list
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{
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py::list li;
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li.append (py::cast(self.pnum));
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return li;
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}))
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;
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py::class_<FaceDescriptor>(m, "FaceDescriptor")
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.def(py::init<const FaceDescriptor&>())
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.def("__init__",
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[](FaceDescriptor *instance, int surfnr, int domin, int domout, int bc)
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{
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new (instance) FaceDescriptor();
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instance->SetSurfNr(surfnr);
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instance->SetDomainIn(domin);
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instance->SetDomainOut(domout);
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instance->SetBCProperty(bc);
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},
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py::arg("surfnr")=1,
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py::arg("domin")=1,
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py::arg("domout")=py::int_(0),
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py::arg("bc")=py::int_(0),
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"create facedescriptor")
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.def("__str__", &ToString<FaceDescriptor>)
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.def("__repr__", &ToString<FaceDescriptor>)
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.def_property("surfnr", &FaceDescriptor::SurfNr, &FaceDescriptor::SetSurfNr)
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.def_property("domin", &FaceDescriptor::DomainIn, &FaceDescriptor::SetDomainIn)
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.def_property("domout", &FaceDescriptor::DomainOut, &FaceDescriptor::SetDomainOut)
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.def_property("bc", &FaceDescriptor::BCProperty, &FaceDescriptor::SetBCProperty)
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.def_property_readonly("bcname", FunctionPointer ([](FaceDescriptor & self) -> string { return self.GetBCName(); }))
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.def("SetSurfaceColor", [](FaceDescriptor & self, py::list color )
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{
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Vec3d c;
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c.X() = py::extract<double>(color[0])();
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c.Y() = py::extract<double>(color[1])();
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c.Z() = py::extract<double>(color[2])();
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self.SetSurfColour(c);
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})
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;
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ExportArray<Element,0,ElementIndex>(m);
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ExportArray<Element2d,0,SurfaceElementIndex>(m);
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ExportArray<Segment>(m);
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ExportArray<Element0d>(m);
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ExportArray<MeshPoint,PointIndex::BASE,PointIndex>(m);
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ExportArray<FaceDescriptor>(m);
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py::implicitly_convertible< int, PointIndex>();
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py::class_<Mesh,shared_ptr<Mesh>>(m, "Mesh")
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// .def(py::init<>("create empty mesh"))
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.def("__init__",
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[](Mesh *instance, int dim)
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{
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new (instance) Mesh();
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instance->SetDimension(dim);
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},
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py::arg("dim")=3
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)
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.def("__str__", &ToString<Mesh>)
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.def("Load", FunctionPointer
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([](Mesh & self, const string & filename)
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{
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istream * infile;
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if (filename.find(".vol.gz") != string::npos)
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infile = new igzstream (filename.c_str());
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else
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infile = new ifstream (filename.c_str());
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// ifstream input(filename);
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#ifdef PARALLEL
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// int id;
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MPI_Comm_rank(MPI_COMM_WORLD, &id);
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MPI_Comm_size(MPI_COMM_WORLD, &ntasks);
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if (id == 0)
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{
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self.Load(*infile);
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self.Distribute();
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}
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else
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{
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self.SendRecvMesh();
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}
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#else
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self.Load(*infile);
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#endif
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for (int i = 0; i < geometryregister.Size(); i++)
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{
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NetgenGeometry * hgeom = geometryregister[i]->LoadFromMeshFile (*infile);
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if (hgeom)
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{
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ng_geometry.reset (hgeom);
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break;
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}
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}
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}))
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// static_cast<void(Mesh::*)(const string & name)>(&Mesh::Load))
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.def("Save", static_cast<void(Mesh::*)(const string & name)const>(&Mesh::Save))
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.def("Export",
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[] (Mesh & self, string filename, string format)
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{
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if (WriteUserFormat (format, self, *self.GetGeometry(), filename))
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{
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string err = string ("nothing known about format")+format;
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Array<const char*> names, extensions;
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RegisterUserFormats (names, extensions);
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err += "\navailable formats are:\n";
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for (auto name : names)
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err += string("'") + name + "'\n";
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throw NgException (err);
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}
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},
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py::arg("filename"), py::arg("format"))
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.def_property("dim", &Mesh::GetDimension, &Mesh::SetDimension)
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.def("Elements3D",
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static_cast<Array<Element,0,ElementIndex>&(Mesh::*)()> (&Mesh::VolumeElements),
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py::return_value_policy::reference)
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.def("Elements2D",
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static_cast<Array<Element2d,0,SurfaceElementIndex>&(Mesh::*)()> (&Mesh::SurfaceElements),
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py::return_value_policy::reference)
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.def("Elements1D",
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static_cast<Array<Segment>&(Mesh::*)()> (&Mesh::LineSegments),
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py::return_value_policy::reference)
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.def("Elements0D", FunctionPointer([] (Mesh & self) -> Array<Element0d>&
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{
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return self.pointelements;
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} ),
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py::return_value_policy::reference)
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.def("Points",
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static_cast<Mesh::T_POINTS&(Mesh::*)()> (&Mesh::Points),
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py::return_value_policy::reference)
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.def("FaceDescriptor", static_cast<FaceDescriptor&(Mesh::*)(int)> (&Mesh::GetFaceDescriptor),
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py::return_value_policy::reference)
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.def("GetNFaceDescriptors", &Mesh::GetNFD)
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.def("GetNCD2Names", &Mesh::GetNCD2Names)
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.def("__getitem__", FunctionPointer ([](const Mesh & self, PointIndex pi)
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{
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return self[pi];
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}))
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.def ("Add", FunctionPointer ([](Mesh & self, MeshPoint p)
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{
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return self.AddPoint (Point3d(p));
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}))
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.def ("Add", FunctionPointer ([](Mesh & self, const Element & el)
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{
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return self.AddVolumeElement (el);
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}))
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.def ("Add", FunctionPointer ([](Mesh & self, const Element2d & el)
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{
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return self.AddSurfaceElement (el);
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}))
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.def ("Add", FunctionPointer ([](Mesh & self, const Segment & el)
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{
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return self.AddSegment (el);
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}))
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.def ("Add", FunctionPointer ([](Mesh & self, const Element0d & el)
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{
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return self.pointelements.Append (el);
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}))
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.def ("Add", FunctionPointer ([](Mesh & self, const FaceDescriptor & fd)
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{
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return self.AddFaceDescriptor (fd);
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}))
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.def ("SetBCName", &Mesh::SetBCName)
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.def ("GetBCName", FunctionPointer([](Mesh & self, int bc)->string
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{ return self.GetBCName(bc); }))
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.def ("SetMaterial", &Mesh::SetMaterial)
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.def ("GetMaterial", FunctionPointer([](Mesh & self, int domnr)
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{ return string(self.GetMaterial(domnr)); }))
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.def ("GetCD2Name", &Mesh::GetCD2Name)
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.def("SetCD2Name", &Mesh::SetCD2Name)
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.def ("AddPointIdentification", [](Mesh & self, py::object pindex1, py::object pindex2, int identnr, int type)
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{
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if(py::extract<PointIndex>(pindex1).check() && py::extract<PointIndex>(pindex2).check())
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{
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self.GetIdentifications().Add (py::extract<PointIndex>(pindex1)(), py::extract<PointIndex>(pindex2)(), identnr);
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self.GetIdentifications().SetType(identnr, Identifications::ID_TYPE(type)); // type = 2 ... periodic
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}
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},
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//py::default_call_policies(),
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py::arg("pid1"),
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py::arg("pid2"),
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py::arg("identnr"),
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py::arg("type"))
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.def ("GenerateVolumeMesh",
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[](Mesh & self, py::object pymp)
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{
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cout << "generate vol mesh" << endl;
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MeshingParameters mp;
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if (py::extract<MeshingParameters>(pymp).check())
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mp = py::extract<MeshingParameters>(pymp)();
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else
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{
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mp.optsteps3d = 5;
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}
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MeshVolume (mp, self);
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OptimizeVolume (mp, self);
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},
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py::arg("mp")=NGDummyArgument())
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.def ("OptimizeVolumeMesh", FunctionPointer
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([](Mesh & self)
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{
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MeshingParameters mp;
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mp.optsteps3d = 5;
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OptimizeVolume (mp, self);
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}))
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.def ("Refine", FunctionPointer
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([](Mesh & self)
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{
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if (self.GetGeometry())
|
|
self.GetGeometry()->GetRefinement().Refine(self);
|
|
else
|
|
Refinement().Refine(self);
|
|
}))
|
|
|
|
.def ("SetGeometry", FunctionPointer
|
|
([](Mesh & self, shared_ptr<CSGeometry> geo)
|
|
{
|
|
self.SetGeometry(geo);
|
|
}))
|
|
|
|
// TODO: fix this dependency on libgeom2d.so
|
|
// .def ("SetGeometry", FunctionPointer
|
|
// ([](Mesh & self, shared_ptr<SplineGeometry2d> geo)
|
|
// {
|
|
// self.SetGeometry(geo);
|
|
// }))
|
|
|
|
.def ("BuildSearchTree", &Mesh::BuildElementSearchTree)
|
|
|
|
.def ("BoundaryLayer", FunctionPointer
|
|
([](Mesh & self, int bc, py::list thicknesses, int volnr, py::list materials)
|
|
{
|
|
int n = py::len(thicknesses);
|
|
BoundaryLayerParameters blp;
|
|
|
|
for (int i = 1; i <= self.GetNFD(); i++)
|
|
if (self.GetFaceDescriptor(i).BCProperty() == bc)
|
|
blp.surfid.Append (i);
|
|
|
|
cout << "add layer at surfaces: " << blp.surfid << endl;
|
|
|
|
blp.prismlayers = n;
|
|
blp.growthfactor = 1.0;
|
|
|
|
// find max domain nr
|
|
int maxind = 0;
|
|
for (ElementIndex ei = 0; ei < self.GetNE(); ei++)
|
|
maxind = max (maxind, self[ei].GetIndex());
|
|
cout << "maxind = " << maxind << endl;
|
|
for ( int i=0; i<n; i++ )
|
|
{
|
|
blp.heights.Append( py::extract<double>(thicknesses[i])()) ;
|
|
blp.new_matnrs.Append( maxind+1+i );
|
|
self.SetMaterial (maxind+1+i, py::extract<string>(materials[i])().c_str());
|
|
}
|
|
blp.bulk_matnr = volnr;
|
|
GenerateBoundaryLayer (self, blp);
|
|
}
|
|
))
|
|
|
|
.def ("BoundaryLayer", FunctionPointer
|
|
([](Mesh & self, int bc, double thickness, int volnr, string material)
|
|
{
|
|
BoundaryLayerParameters blp;
|
|
|
|
for (int i = 1; i <= self.GetNFD(); i++)
|
|
if (self.GetFaceDescriptor(i).BCProperty() == bc)
|
|
blp.surfid.Append (i);
|
|
|
|
cout << "add layer at surfaces: " << blp.surfid << endl;
|
|
|
|
blp.prismlayers = 1;
|
|
blp.hfirst = thickness;
|
|
blp.growthfactor = 1.0;
|
|
|
|
// find max domain nr
|
|
int maxind = 0;
|
|
for (ElementIndex ei = 0; ei < self.GetNE(); ei++)
|
|
maxind = max (maxind, self[ei].GetIndex());
|
|
cout << "maxind = " << maxind << endl;
|
|
self.SetMaterial (maxind+1, material.c_str());
|
|
blp.new_matnr = maxind+1;
|
|
blp.bulk_matnr = volnr;
|
|
GenerateBoundaryLayer (self, blp);
|
|
}
|
|
))
|
|
|
|
.def ("Scale", FunctionPointer([](Mesh & self, double factor)
|
|
{
|
|
for(auto i = 0; i<self.GetNP();i++)
|
|
self.Point(i).Scale(factor);
|
|
}))
|
|
|
|
;
|
|
|
|
|
|
py::enum_<MESHING_STEP>(m,"MeshingStep")
|
|
.value("MESHEDGES",MESHCONST_MESHEDGES)
|
|
.value("MESHSURFACE",MESHCONST_OPTSURFACE)
|
|
.value("MESHVOLUME",MESHCONST_OPTVOLUME)
|
|
;
|
|
|
|
typedef MeshingParameters MP;
|
|
py::class_<MP> (m, "MeshingParameters")
|
|
.def(py::init<>())
|
|
.def("__init__",
|
|
[](MP *instance, double maxh, bool quad_dominated, int optsteps2d, int optsteps3d,
|
|
MESHING_STEP perfstepsend, int only3D_domain)
|
|
{
|
|
new (instance) MeshingParameters;
|
|
instance->maxh = maxh;
|
|
instance->quad = int(quad_dominated);
|
|
instance->optsteps2d = optsteps2d;
|
|
instance->optsteps3d = optsteps3d;
|
|
instance->only3D_domain_nr = only3D_domain;
|
|
instance->perfstepsend = perfstepsend;
|
|
},
|
|
py::arg("maxh")=1000,
|
|
py::arg("quad_dominated")=false,
|
|
py::arg("optsteps2d") = 3,
|
|
py::arg("optsteps3d") = 3,
|
|
py::arg("perfstepsend") = MESHCONST_OPTVOLUME,
|
|
py::arg("only3D_domain") = 0,
|
|
"create meshing parameters"
|
|
)
|
|
.def("__str__", &ToString<MP>)
|
|
.def_property("maxh",
|
|
FunctionPointer ([](const MP & mp ) { return mp.maxh; }),
|
|
FunctionPointer ([](MP & mp, double maxh) { return mp.maxh = maxh; }))
|
|
.def("RestrictH", FunctionPointer
|
|
([](MP & mp, double x, double y, double z, double h)
|
|
{
|
|
mp.meshsize_points.Append ( MeshingParameters::MeshSizePoint (Point<3> (x,y,z), h));
|
|
}),
|
|
py::arg("x"), py::arg("y"), py::arg("z"), py::arg("h")
|
|
)
|
|
;
|
|
|
|
m.def("SetTestoutFile", FunctionPointer ([] (const string & filename)
|
|
{
|
|
delete testout;
|
|
testout = new ofstream (filename);
|
|
}));
|
|
|
|
m.def("SetMessageImportance", FunctionPointer ([] (int importance)
|
|
{
|
|
int old = printmessage_importance;
|
|
printmessage_importance = importance;
|
|
return old;
|
|
}));
|
|
}
|
|
|
|
PYBIND11_PLUGIN(libmesh) {
|
|
py::module m("mesh", "pybind mesh");
|
|
ExportNetgenMeshing(m);
|
|
return m.ptr();
|
|
}
|
|
#endif
|
|
|
|
|
|
|
|
|