mirror of
https://github.com/NGSolve/netgen.git
synced 2024-11-14 10:08:32 +05:00
163135981e
Functions with a python typed argument (kwargs in this case) cannot use py::call_guard<py::gil_scoped_release>() because it means, the GIL is not held when the function returns (and cleans up arguments/temporary variables). Thus, remove the global call guard and create a local variable py::gil_scoped_release gil_release; after arguments are processed and before meshing starts. This local variable is destroyed before the function returns (acquiring the GIL again).
502 lines
20 KiB
C++
502 lines
20 KiB
C++
#ifdef NG_PYTHON
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#include "../general/ngpython.hpp"
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#include "../core/python_ngcore.hpp"
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#include "../meshing/python_mesh.hpp"
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#include "../include/meshing.hpp"
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#include "../include/geometry2d.hpp"
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#include "csg2d.hpp"
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using namespace netgen;
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using namespace pybind11::literals;
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namespace netgen
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{
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extern std::shared_ptr<NetgenGeometry> ng_geometry;
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}
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NGCORE_API_EXPORT void ExportGeom2d(py::module &m)
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{
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py::class_<SplineSegExt, shared_ptr<SplineSegExt>>
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(m, "Spline", "Spline of a SplineGeometry object")
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.def_property("leftdom", [] (SplineSegExt& self) { return self.leftdom; },
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[](SplineSegExt& self, int dom) { self.leftdom = dom; })
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.def_property("rightdom", [] (SplineSegExt& self) { return self.rightdom; },
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[](SplineSegExt& self, int dom) { self.rightdom = dom; })
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.def_property_readonly("bc", [] (SplineSegExt& self) { return self.bc; })
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.def("GetNormal", [](SplineSegExt& self, double t)
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{
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auto tang = self.GetTangent(t).Normalize();
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return Vec<2>(tang[1], -tang[0]);
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})
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.def("StartPoint", [](SplineSegExt& self) { return Point<2>(self.StartPI()); })
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.def("EndPoint", [](SplineSegExt& self) { return Point<2>(self.EndPI()); })
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;
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py::class_<SplineGeometry2d, NetgenGeometry, shared_ptr<SplineGeometry2d>>
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(m, "SplineGeometry",
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"a 2d boundary representation geometry model by lines and splines",
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py::multiple_inheritance())
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.def(py::init<>())
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.def(py::init([](const string& filename)
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{
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auto geo = make_shared<SplineGeometry2d>();
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geo->Load(filename.c_str());
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ng_geometry = geo;
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return geo;
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}))
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.def(NGSPickle<SplineGeometry2d>())
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.def("Load",&SplineGeometry2d::Load)
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.def("SetDomainLayer", &SplineGeometry2d::SetDomainLayer)
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.def("AppendPoint", FunctionPointer
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([](SplineGeometry2d &self, double px, double py, double maxh, double hpref, string name)
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{
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Point<2> p;
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p(0) = px;
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p(1) = py;
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GeomPoint<2> gp(p);
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gp.hmax = maxh;
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gp.hpref = hpref;
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gp.name = name;
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self.geompoints.Append(gp);
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return self.geompoints.Size()-1;
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}),
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py::arg("x"), py::arg("y"), py::arg("maxh") = 1e99, py::arg("hpref")=0, py::arg("name")="")
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.def("Append", FunctionPointer([](SplineGeometry2d &self, py::list segment, int leftdomain, int rightdomain,
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optional<variant<int, string>> bc, optional<int> copy, double maxh,
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double hpref, double hprefleft, double hprefright)
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{
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SplineSegExt * seg;
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if(py::isinstance<py::str>(segment[0]))
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{
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auto segtype = py::cast<std::string>(segment[0]);
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if (segtype == "line")
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{
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LineSeg<2> * l = new LineSeg<2>(self.GetPoint(py::cast<int>(segment[1])),
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self.GetPoint(py::cast<int>(segment[2])));
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seg = new SplineSegExt(*l);
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}
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else if (segtype == "spline3")
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{
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SplineSeg3<2> * seg3 = new SplineSeg3<2>(self.GetPoint(py::cast<int>(segment[1])),
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self.GetPoint(py::cast<int>(segment[2])),
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self.GetPoint(py::cast<int>(segment[3])));
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seg = new SplineSegExt(*seg3);
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}
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else
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throw Exception("Appended segment is not a line or a spline3");
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}
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else
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{
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if(py::len(segment) == 2)
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{
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auto l = new LineSeg<2>(self.GetPoint(py::cast<int>(segment[0])),
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self.GetPoint(py::cast<int>(segment[1])));
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seg = new SplineSegExt(*l);
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}
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else if(py::len(segment) == 3)
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{
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SplineSeg3<2> * seg3 = new SplineSeg3<2>(self.GetPoint(py::cast<int>(segment[0])),
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self.GetPoint(py::cast<int>(segment[1])),
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self.GetPoint(py::cast<int>(segment[2])));
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seg = new SplineSegExt(*seg3);
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}
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else
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throw Exception("Appended segment must either have 2 or 3 points");
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}
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seg->leftdom = leftdomain;
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seg->rightdom = rightdomain;
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seg->hmax = maxh;
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seg->hpref_left = max(hpref, hprefleft);
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seg->hpref_right = max(hpref,hprefright);
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seg->reffak = 1;
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seg->copyfrom = -1;
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if (copy.has_value())
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seg->copyfrom = *copy+1;
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if (bc.has_value())
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{
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if(auto intptr = get_if<int>(&*bc); intptr)
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seg->bc = *intptr;
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else
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{
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auto bcname = get_if<string>(&*bc);
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seg->bc = self.GetNSplines() + 1;
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self.SetBCName(seg->bc, *bcname);
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}
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}
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else
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seg->bc = self.GetNSplines()+1;
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self.AppendSegment(seg);
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return self.GetNSplines()-1;
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}), py::arg("point_indices"), py::arg("leftdomain") = 1, py::arg("rightdomain") = py::int_(0),
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py::arg("bc")=nullopt, py::arg("copy")=nullopt, py::arg("maxh")=1e99,
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py::arg("hpref")=0,py::arg("hprefleft")=0,py::arg("hprefright")=0)
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.def("AppendSegment", FunctionPointer([](SplineGeometry2d &self, py::list point_indices, int leftdomain, int rightdomain)
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{
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int npts = py::len(point_indices);
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SplineSegExt * seg;
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//int a = py::extract<int>(point_indices[0]);
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if (npts == 2)
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{
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LineSeg<2> * l = new LineSeg<2>(self.GetPoint(py::extract<int>(point_indices[0])()), self.GetPoint(py::extract<int>(point_indices[1])()));
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seg = new SplineSegExt(*l);
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}
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else if (npts == 3)
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{
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SplineSeg3<2> * seg3 = new SplineSeg3<2>(self.GetPoint(py::extract<int>(point_indices[0])()), self.GetPoint(py::extract<int>(point_indices[1])()), self.GetPoint(py::extract<int>(point_indices[2])()));
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seg = new SplineSegExt(*seg3);
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}
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else
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throw Exception("Can only append segments with 2 or 3 points!");
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seg->leftdom = leftdomain;
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seg->rightdom = rightdomain;
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seg->hmax = 1e99;
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seg->reffak = 1;
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seg->copyfrom = -1;
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self.AppendSegment(seg);
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}), py::arg("point_indices"), py::arg("leftdomain") = 1, py::arg("rightdomain") = py::int_(0))
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.def("AddCurve",
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[] (SplineGeometry2d & self, py::object func,
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int leftdomain, int rightdomain, py::object bc, double maxh)
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{
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int n = 1000;
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NgArray<Point<2>> points;
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for (int i = 0; i <= n; i++)
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{
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double t = double(i)/n;
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py::tuple xy = func(t);
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double x = py::cast<double>(xy[0]);
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double y = py::cast<double>(xy[1]);
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points.Append (Point<2>(x,y));
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}
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auto spline = new DiscretePointsSeg<2> (points);
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SplineSegExt * spex = new SplineSegExt (*spline);
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spex -> leftdom = leftdomain;
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spex -> rightdom = rightdomain;
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spex->hmax = maxh;
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spex->reffak = 1;
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spex->copyfrom = -1;
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if (py::extract<int>(bc).check())
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spex->bc = py::extract<int>(bc)();
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else if (py::extract<string>(bc).check())
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{
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string bcname = py::extract<string>(bc)();
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spex->bc = self.GetNSplines()+1;
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self.SetBCName(spex->bc, bcname);
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}
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else
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spex->bc = self.GetNSplines()+1;
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self.AppendSegment (spex);
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}, py::arg("func"), py::arg("leftdomain") = 1, py::arg("rightdomain") = py::int_(0),
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py::arg("bc")=NGDummyArgument(), py::arg("maxh")=1e99,
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"Curve is given as parametrization on the interval [0,1]")
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.def("SetMaterial", &SplineGeometry2d::SetMaterial)
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.def("SetDomainMaxH", &SplineGeometry2d::SetDomainMaxh)
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.def("GetBCName", [](SplineGeometry2d& self, size_t index) { return self.GetBCName(index); })
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.def("GetNDomains", [](SplineGeometry2d& self) { return self.GetNDomains(); })
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.def("GetNSplines", [](SplineGeometry2d& self) { return self.splines.Size(); })
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.def("GetSpline", [](SplineGeometry2d& self, size_t index)
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{ return shared_ptr<SplineSegExt>(&self.GetSpline(index), NOOP_Deleter); },
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py::return_value_policy::reference_internal)
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.def("GetNPoints", [](SplineGeometry2d& self) { return self.GetNP(); })
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.def("GetPoint", [](SplineGeometry2d& self, size_t index) { return Point<2>(self.GetPoint(index)); })
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.def("PlotData", FunctionPointer([](SplineGeometry2d &self)
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{
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Box<2> box(self.GetBoundingBox());
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double xdist = box.PMax()(0) - box.PMin()(0);
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double ydist = box.PMax()(1) - box.PMin()(1);
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py::tuple xlim = py::make_tuple(box.PMin()(0) - 0.1*xdist, box.PMax()(0) + 0.1*xdist);
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py::tuple ylim = py::make_tuple(box.PMin()(1) - 0.1*ydist, box.PMax()(1) + 0.1*ydist);
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py::list xpoints, ypoints;
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for (int i = 0; i < self.splines.Size(); i++)
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{
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py::list xp, yp;
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if (self.splines[i]->GetType().compare("line")==0)
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{
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GeomPoint<2> p1 = self.splines[i]->StartPI();
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GeomPoint<2> p2 = self.splines[i]->EndPI();
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xp.append(py::cast(p1(0)));
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xp.append(py::cast(p2(0)));
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yp.append(py::cast(p1(1)));
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yp.append(py::cast(p2(1)));
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}
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else if (self.splines[i]->GetType().compare("spline3")==0)
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{
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double len = self.splines[i]->Length();
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int n = floor(len/(0.05*min(xdist,ydist)));
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for (int j = 0; j <= n; j++)
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{
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GeomPoint<2> point = self.splines[i]->GetPoint(j*1./n);
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xp.append(py::cast(point(0)));
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yp.append(py::cast(point(1)));
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}
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}
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else
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{
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cout << "spline is neither line nor spline3" << endl;
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}
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xpoints.append(xp);
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ypoints.append(yp);
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}
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return py::tuple(py::make_tuple(xlim, ylim, xpoints, ypoints));
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}))
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.def("_visualizationData", [](SplineGeometry2d &self)
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{
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Box<2> box(self.GetBoundingBox());
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double xdist = box.PMax()(0) - box.PMin()(0);
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double ydist = box.PMax()(1) - box.PMin()(1);
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py::dict data;
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py::dict segment_data;
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auto min_val = py::make_tuple(box.PMin()(0), box.PMin()(1),0);
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auto max_val = py::make_tuple(box.PMax()(1),box.PMax()(1),0);
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py::list vertices;
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py::list domains;
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py::list segment_points;
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py::list segment_normals;
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py::list leftdom;
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py::list rightdom;
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int max_bcnr = 0;
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for(int i = 0; i < self.splines.Size(); i++)
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{
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std::vector<netgen::GeomPoint<2>> lst;
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if (self.splines[i]->GetType().compare("line") == 0)
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lst = { self.splines[i]->StartPI(), self.splines[i]->EndPI() };
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else if(self.splines[i]->GetType().compare("spline3") == 0)
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{
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double len = self.splines[i]->Length();
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int n = floor(len/(0.05*min(xdist,ydist)));
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n = max(3, n);
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lst.push_back(self.splines[i]->StartPI());
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for (int j = 1; j < n; j++){
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lst.push_back(self.splines[i]->GetPoint(j*1./n));
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lst.push_back(self.splines[i]->GetPoint(j*1./n));
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}
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lst.push_back(self.splines[i]->EndPI());
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}
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else
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{
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throw NgException("Spline is neither line nor spline3");
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}
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for (auto point : lst)
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{
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for(auto val : {point(0), point(1), 0.})
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vertices.append(val);
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int bcnr = self.GetSpline(i).bc;
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max_bcnr = max2(max_bcnr, bcnr);
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domains.append(bcnr);
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domains.append(self.GetSpline(i).leftdom);
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domains.append(self.GetSpline(i).rightdom);
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}
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// segment data
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auto pnt = self.splines[i]->GetPoint(0.5);
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segment_points.append(py::make_tuple(pnt(0),pnt(1)));
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auto normal = self.GetSpline(i).GetTangent(0.5);
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std::swap(normal(0),normal(1));
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normal(1) *= -1;
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normal *= 1./sqrt(normal(0) * normal(0) + normal(1)*normal(1));
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segment_normals.append(py::make_tuple(normal(0),normal(1)));
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leftdom.append(self.GetSpline(i).leftdom);
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rightdom.append(self.GetSpline(i).rightdom);
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}
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py::list bcnames;
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for (int i = 1; i<max_bcnr + 1; i++)
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bcnames.append(self.GetBCName(i));
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segment_data["midpoints"] = segment_points;
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segment_data["normals"] = segment_normals;
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segment_data["leftdom"] = leftdom;
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segment_data["rightdom"] = rightdom;
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data["segment_data"] = segment_data;
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data["vertices"] = vertices;
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data["domains"] = domains;
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data["min"] = min_val;
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data["max"] = max_val;
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data["bcnames"] = bcnames;
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return data;
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})
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.def("PointData", FunctionPointer([](SplineGeometry2d &self)
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{
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py::list xpoints, ypoints, pointindex;
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for (int i = 0; i < self.geompoints.Size(); i++)
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{
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pointindex.append(py::cast(i));
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xpoints.append(py::cast(self.geompoints[i][0]));
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ypoints.append(py::cast(self.geompoints[i][1]));
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}
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return py::tuple(py::make_tuple(xpoints, ypoints, pointindex));
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}))
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.def("SegmentData", FunctionPointer([](SplineGeometry2d &self)
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{
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py::list leftpoints, rightpoints, leftdom, rightdom;
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for (int i = 0; i < self.splines.Size(); i++)
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{
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GeomPoint<2> point = self.splines[i]->GetPoint(0.5);
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Vec<2> normal = self.GetSpline(i).GetTangent(0.5);
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double temp = normal(0);
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normal(0) = normal(1);
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normal(1) = -temp;
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leftdom.append(py::cast(self.GetSpline(i).leftdom));
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rightdom.append(py::cast(self.GetSpline(i).rightdom));
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rightpoints.append(py::make_tuple(point(0), point(1), normal(0)<0, normal(1)<0));
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leftpoints.append(py::make_tuple(point(0), point(1), normal(0)<0, normal(1)<0));
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}
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return py::tuple(py::make_tuple(leftpoints, rightpoints, leftdom, rightdom));
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}))
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.def("Print", FunctionPointer([](SplineGeometry2d &self)
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{
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for (int i = 0; i < self.geompoints.Size(); i++)
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{
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cout << i << " : " << self.geompoints[i][0] << " , " << self.geompoints[i][1] << endl;
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}
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//Box<2> box(self.GetBoundingBox());
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//cout << box.PMin() << endl;
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//cout << box.PMax() << endl;
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cout << self.splines.Size() << endl;
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for (int i = 0; i < self.splines.Size(); i++)
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{
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cout << self.splines[i]->GetType() << endl;
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//cout << i << " : " << self.splines[i]->GetPoint(0.1) << " , " << self.splines[i]->GetPoint(0.5) << endl;
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}
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}))
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.def("Draw", FunctionPointer
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([] (shared_ptr<SplineGeometry2d> self)
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{
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ng_geometry = self;
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py::module::import("netgen").attr("Redraw")();
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})
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)
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.def("GenerateMesh", [](shared_ptr<SplineGeometry2d> self,
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optional<MeshingParameters> pars, py::kwargs kwargs)
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{
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MeshingParameters mp;
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if(pars) mp = *pars;
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CreateMPfromKwargs(mp, kwargs);
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py::gil_scoped_release gil_release;
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auto mesh = make_shared<Mesh>();
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mesh->SetGeometry(self);
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SetGlobalMesh (mesh);
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ng_geometry = self;
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auto result = self->GenerateMesh(mesh, mp);
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if(result != 0)
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throw Exception("Meshing failed!");
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return mesh;
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}, py::arg("mp") = nullopt,
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meshingparameter_description.c_str())
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.def("_SetDomainTensorMeshing", &SplineGeometry2d::SetDomainTensorMeshing)
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;
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py::class_<Solid2d>(m, "Solid2d")
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.def(py::init<>())
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.def(py::init<Array<std::variant<Point<2>, EdgeInfo, PointInfo>>, std::string, std::string>(), py::arg("points"), py::arg("mat")=MAT_DEFAULT, py::arg("bc")=BC_DEFAULT)
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.def(py::self+py::self)
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.def(py::self-py::self)
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.def(py::self*py::self)
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.def(py::self+=py::self)
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.def(py::self-=py::self)
|
|
.def(py::self*=py::self)
|
|
|
|
.def("Mat", &Solid2d::Mat)
|
|
.def("BC", &Solid2d::BC)
|
|
.def("Maxh", &Solid2d::Maxh)
|
|
.def("Layer", &Solid2d::Layer)
|
|
|
|
.def("Copy", [](Solid2d & self) -> Solid2d { return self; })
|
|
.def("Move", &Solid2d::Move)
|
|
.def("Scale", static_cast<Solid2d& (Solid2d::*)(double)>(&Solid2d::Scale))
|
|
.def("Scale", static_cast<Solid2d& (Solid2d::*)(Vec<2>)>(&Solid2d::Scale))
|
|
.def("Rotate", &Solid2d::RotateDeg, py::arg("angle"), py::arg("center")=Point<2>{0,0})
|
|
;
|
|
|
|
|
|
m.def("Rectangle", [](Point<2> p0, Point<2> p1, string mat, string bc, optional<string> bottom, optional<string> right, optional<string> top, optional<string> left) -> Solid2d
|
|
{
|
|
using P = Point<2>;
|
|
return { {
|
|
p0, EdgeInfo{bottom ? *bottom : bc},
|
|
P{p1[0],p0[1]}, EdgeInfo {right ? *right : bc},
|
|
p1, EdgeInfo {top ? *top : bc},
|
|
P{p0[0],p1[1]}, EdgeInfo {left ? *left : bc},
|
|
}, mat};
|
|
},
|
|
"pmin"_a, "pmax"_a, "mat"_a=MAT_DEFAULT, "bc"_a=BC_DEFAULT,
|
|
"bottom"_a=nullopt, "right"_a=nullopt, "top"_a=nullopt, "left"_a=nullopt
|
|
);
|
|
m.def("Circle", Circle, py::arg("center"), py::arg("radius"), py::arg("mat")=MAT_DEFAULT, py::arg("bc")=BC_DEFAULT);
|
|
|
|
py::class_<CSG2d>(m, "CSG2d")
|
|
.def(py::init<>())
|
|
.def("GenerateSplineGeometry", &CSG2d::GenerateSplineGeometry)
|
|
.def("Add", &CSG2d::Add)
|
|
.def("GenerateMesh", [](CSG2d & self, optional<MeshingParameters> pars, py::kwargs kwargs)
|
|
{
|
|
MeshingParameters mp;
|
|
if(pars) mp = *pars;
|
|
CreateMPfromKwargs(mp, kwargs);
|
|
py::gil_scoped_release gil_release;
|
|
auto mesh = make_shared<Mesh>();
|
|
auto geo = self.GenerateSplineGeometry();
|
|
mesh->SetGeometry(geo);
|
|
SetGlobalMesh (mesh);
|
|
ng_geometry = geo;
|
|
auto result = geo->GenerateMesh(mesh, mp);
|
|
if(result != 0)
|
|
throw Exception("Meshing failed!");
|
|
return mesh;
|
|
}, py::arg("mp") = nullopt,
|
|
meshingparameter_description.c_str())
|
|
;
|
|
|
|
py::class_<EdgeInfo>(m, "EdgeInfo")
|
|
.def(py::init<>())
|
|
.def(py::init<const Point<2>&>(), py::arg("control_point"))
|
|
.def(py::init<double>(), py::arg("maxh"))
|
|
.def(py::init<string>(), py::arg("bc"))
|
|
.def(py::init<optional<Point<2>>, double, string>(), py::arg("control_point")=nullopt, py::arg("maxh")=MAXH_DEFAULT, py::arg("bc")=BC_DEFAULT)
|
|
;
|
|
py::class_<PointInfo>(m, "PointInfo")
|
|
.def(py::init<>())
|
|
.def(py::init<double>(), "maxh"_a)
|
|
.def(py::init<string>(), "name"_a)
|
|
.def(py::init<double, string>(), "maxh"_a, "name"_a)
|
|
;
|
|
}
|
|
|
|
PYBIND11_MODULE(libgeom2d, m) {
|
|
ExportGeom2d(m);
|
|
}
|
|
|
|
#endif
|
|
|