mirror of
https://github.com/NGSolve/netgen.git
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307 lines
11 KiB
C++
307 lines
11 KiB
C++
#ifdef NG_PYTHON
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#include <boost/python.hpp>
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#include <csg.hpp>
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using namespace netgen;
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namespace bp = boost::python;
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//////////////////////////////////////////////////////////////////////
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// Lambda to function pointer conversion
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template <typename Function>
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struct function_traits
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: public function_traits<decltype(&Function::operator())> {};
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template <typename ClassType, typename ReturnType, typename... Args>
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struct function_traits<ReturnType(ClassType::*)(Args...) const> {
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typedef ReturnType (*pointer)(Args...);
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typedef ReturnType return_type;
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};
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template <typename Function>
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typename function_traits<Function>::pointer
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FunctionPointer (const Function& lambda) {
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return static_cast<typename function_traits<Function>::pointer>(lambda);
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}
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template <class T>
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inline string ToString (const T& t)
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{
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stringstream ss;
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ss << t;
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return ss.str();
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}
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// a shadow solid tree using shared pointers.
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class SPSolid
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{
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shared_ptr<SPSolid> s1, s2;
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Solid * solid;
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int bc = -1;
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string material;
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bool owner;
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public:
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enum optyp { TERM, SECTION, UNION, SUB };
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SPSolid (Solid * as) : solid(as), owner(true), op(TERM) { ; }
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~SPSolid ()
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{
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; // if (owner) delete solid;
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}
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SPSolid (optyp aop, shared_ptr<SPSolid> as1, shared_ptr<SPSolid> as2)
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: s1(as1), s2(as2), owner(true), op(aop)
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{
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if (aop == UNION)
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solid = new Solid (Solid::UNION, s1->GetSolid(), s2->GetSolid());
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else if (aop == SECTION)
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solid = new Solid (Solid::SECTION, s1->GetSolid(), s2->GetSolid());
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else if (aop == SUB)
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solid = new Solid (Solid::SUB, s1->GetSolid()); // , s2->GetSolid());
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}
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Solid * GetSolid() { return solid; }
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const Solid * GetSolid() const { return solid; }
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void GiveUpOwner()
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{
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owner = false;
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if (s1) s1 -> GiveUpOwner();
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if (s2) s2 -> GiveUpOwner();
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}
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void AddSurfaces(CSGeometry & geom)
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{
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if (op == TERM)
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geom.AddSurfaces (solid->GetPrimitive());
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if (s1) s1 -> AddSurfaces (geom);
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if (s2) s2 -> AddSurfaces (geom);
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}
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void SetMaterial (string mat) { material = mat; }
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string GetMaterial ()
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{
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if (!material.empty()) return material;
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if (s1)
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{
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string s1mat = s1->GetMaterial();
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if (!s1mat.empty()) return s1mat;
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}
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if (s2)
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{
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string s2mat = s2->GetMaterial();
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if (!s2mat.empty()) return s2mat;
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}
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return material;
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}
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void SetBC(int abc)
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{
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if (bc == -1)
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{
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bc = abc;
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if (s1) s1 -> SetBC(bc);
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if (s2) s2 -> SetBC(bc);
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if (op == TERM)
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{
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Primitive * prim = solid -> GetPrimitive();
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for (int i = 0; i < prim->GetNSurfaces(); i++)
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prim->GetSurface(i).SetBCProperty (abc);
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cout << "set " << prim->GetNSurfaces() << " surfaces to bc " << bc << endl;
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}
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}
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}
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private:
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optyp op;
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};
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inline ostream & operator<< (ostream & ost, const SPSolid & sol)
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{
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ost << *sol.GetSolid();
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return ost;
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}
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namespace netgen
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{
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extern CSGeometry * ParseCSG (istream & istr);
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}
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void ExportCSG()
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{
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std::string nested_name = "csg";
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if( bp::scope() )
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nested_name = bp::extract<std::string>(bp::scope().attr("__name__") + ".csg");
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bp::object module(bp::handle<>(bp::borrowed(PyImport_AddModule(nested_name.c_str()))));
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cout << "exporting csg " << nested_name << endl;
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bp::object parent = bp::scope() ? bp::scope() : bp::import("__main__");
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parent.attr("csg") = module ;
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bp::scope local_scope(module);
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bp::class_<Point<2>> ("Point2d", bp::init<double,double>())
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.def(bp::self+Vec<2>())
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;
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bp::class_<Point<3>> ("Point3d", bp::init<double,double,double>())
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.def(bp::self-bp::self)
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.def(bp::self+Vec<3>())
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.def(bp::self-Vec<3>())
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;
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bp::def ("Pnt", FunctionPointer( [] (double x, double y, double z) { return Point<3>(x,y,z); } ) );
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bp::def ("Pnt", FunctionPointer( [] (double x, double y) { return Point<2>(x,y); } ) );
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bp::class_<Vec<2>> ("Vec2d", bp::init<double,double>())
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.def(bp::self+bp::self)
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// .def(bp::self*double())
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.def(double()*bp::self)
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;
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bp::class_<Vec<3>> ("Vec3d", bp::init<double,double,double>())
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.def(bp::self+bp::self)
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// .def(bp::self*double())
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.def(double()*bp::self)
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;
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bp::def ("Vec", FunctionPointer( [] (double x, double y, double z) { return Vec<3>(x,y,z); } ) );
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bp::def ("Vec", FunctionPointer( [] (double x, double y) { return Vec<2>(x,y); } ) );
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bp::class_<SPSolid, shared_ptr<SPSolid>, boost::noncopyable> ("Solid", bp::no_init)
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.def ("__str__", &ToString<SPSolid>)
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.def ("__add__", FunctionPointer( [] ( shared_ptr<SPSolid> self, shared_ptr<SPSolid> other ) { return make_shared<SPSolid> (SPSolid::UNION, self, other); } ) )
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.def ("__mul__", FunctionPointer( [] ( shared_ptr<SPSolid> self, shared_ptr<SPSolid> other ) { return make_shared<SPSolid> (SPSolid::SECTION, self, other); } ) )
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.def ("__sub__", FunctionPointer( [] ( shared_ptr<SPSolid> self, shared_ptr<SPSolid> other )
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{ return make_shared<SPSolid> (SPSolid::SECTION, self, make_shared<SPSolid> (SPSolid::SUB, other, nullptr)); } ) )
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// .def ("__neg__", FunctionPointer( [] ( shared_ptr<SPSolid> self ) { return make_shared<SPSolid> (SPSolid::SUB, self); } ) ) COMPLEMENT?
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.def ("bc", FunctionPointer([](shared_ptr<SPSolid> & self, int nr) -> shared_ptr<SPSolid>
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{ self->SetBC(nr); return self; }))
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.def ("mat", FunctionPointer([](shared_ptr<SPSolid> & self, string mat) -> shared_ptr<SPSolid>
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{ self->SetMaterial(mat); return self; }))
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.def ("mat", &SPSolid::GetMaterial)
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;
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bp::def ("Sphere", FunctionPointer([](Point<3> c, double r)
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{
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Sphere * sp = new Sphere (c, r);
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Solid * sol = new Solid (sp);
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return make_shared<SPSolid> (sol);
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}));
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bp::def ("Plane", FunctionPointer([](Point<3> p, Vec<3> n)
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{
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Plane * sp = new Plane (p,n);
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Solid * sol = new Solid (sp);
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return make_shared<SPSolid> (sol);
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}));
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bp::def ("Cylinder", FunctionPointer([](Point<3> a, Point<3> b, double r)
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{
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Cylinder * cyl = new Cylinder (a, b, r);
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Solid * sol = new Solid (cyl);
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return make_shared<SPSolid> (sol);
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}));
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bp::def ("OrthoBrick", FunctionPointer([](Point<3> p1, Point<3> p2)
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{
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OrthoBrick * brick = new OrthoBrick (p1,p2);
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Solid * sol = new Solid (brick);
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return make_shared<SPSolid> (sol);
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}));
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bp::def ("Or", FunctionPointer([](shared_ptr<SPSolid> s1, shared_ptr<SPSolid> s2)
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{
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return make_shared<SPSolid> (SPSolid::UNION, s1, s2);
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}));
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bp::def ("And", FunctionPointer([](shared_ptr<SPSolid> s1, shared_ptr<SPSolid> s2)
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{
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return make_shared<SPSolid> (SPSolid::SECTION, s1, s2);
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}));
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bp::class_<CSGeometry, boost::noncopyable> ("CSGeometry")
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.def("__init__", bp::make_constructor (FunctionPointer
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([](const string & filename)
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{
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cout << "load geometry";
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ifstream ist(filename);
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shared_ptr<CSGeometry> geom(ParseCSG(ist));
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geom -> FindIdenticSurfaces(1e-8 * geom->MaxSize());
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return geom;
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})))
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.def("__init__", bp::make_constructor (FunctionPointer
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([](const bp::list & solidlist)
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{
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cout << "csg from list";
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auto geom = make_shared<CSGeometry>();
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for (int i = 0; i < len(solidlist); i++)
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{
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bp::object obj = solidlist[i];
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cout << "obj " << i << endl;
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bp::extract<shared_ptr<SPSolid>> solid(solidlist[i]);
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if(solid.check())
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{
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cout << "its a solid" << endl;
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solid()->AddSurfaces (*geom);
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solid()->GiveUpOwner();
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int tlonr = geom->SetTopLevelObject (solid()->GetSolid());
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geom->GetTopLevelObject(tlonr) -> SetMaterial(solid()->GetMaterial());
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}
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}
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geom -> FindIdenticSurfaces(1e-8 * geom->MaxSize());
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return geom;
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})))
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.def("Save", FunctionPointer([] (CSGeometry & self, string filename)
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{
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cout << "save geometry to file " << filename << endl;
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self.Save (filename);
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}))
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.def("Add", FunctionPointer
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([] (CSGeometry & self, shared_ptr<SPSolid> solid)
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{
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solid->AddSurfaces (self);
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solid->GiveUpOwner();
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int tlonr = self.SetTopLevelObject (solid->GetSolid());
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self.GetTopLevelObject(tlonr) -> SetMaterial(solid->GetMaterial());
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}))
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.add_property ("ntlo", &CSGeometry::GetNTopLevelObjects)
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;
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bp::def("GenerateMesh", FunctionPointer
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([](CSGeometry & geo, MeshingParameters & param)
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{
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// testout = new ofstream ("test.out");
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shared_ptr<Mesh> dummy;
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cout << "Genrate Mesh, params = " << param << endl;
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cout << "geom, bbox = " << geo.BoundingBox() << endl;
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geo.FindIdenticSurfaces(1e-8 * geo.MaxSize());
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geo.GenerateMesh (dummy, param, 0, 6);
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return dummy;
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}))
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;
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}
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BOOST_PYTHON_MODULE(libcsg) {
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ExportCSG();
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}
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#endif
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