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https://github.com/NGSolve/netgen.git
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103 lines
3.3 KiB
C++
103 lines
3.3 KiB
C++
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#ifdef NG_PYTHON
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#include <../general/ngpython.hpp>
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#include <stlgeom.hpp>
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#ifdef WIN32
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#define DLL_HEADER __declspec(dllexport)
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#endif
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using namespace netgen;
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namespace netgen
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{
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//extern shared_ptr<Mesh> mesh;
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extern shared_ptr<NetgenGeometry> ng_geometry;
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}
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DLL_HEADER void ExportSTL(py::module & m)
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{
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py::class_<STLGeometry,shared_ptr<STLGeometry>, NetgenGeometry> (m,"STLGeometry")
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.def(py::init<>())
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.def(NGSPickle<STLGeometry>())
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.def("_visualizationData", [](shared_ptr<STLGeometry> stl_geo)
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{
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std::vector<float> vertices;
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std::vector<int> trigs;
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std::vector<float> normals;
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std::vector<float> min = {std::numeric_limits<float>::max(),
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std::numeric_limits<float>::max(),
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std::numeric_limits<float>::max()};
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std::vector<float> max = {std::numeric_limits<float>::lowest(),
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std::numeric_limits<float>::lowest(),
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std::numeric_limits<float>::lowest()};
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std::vector<string> surfnames;
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surfnames.push_back("stl");
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vertices.reserve(stl_geo->GetNT()*3*3);
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trigs.reserve(stl_geo->GetNT()*4);
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normals.reserve(stl_geo->GetNT()*3*3);
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size_t ii = 0;
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for(int i = 0; i < stl_geo->GetNT(); i++)
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{
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auto& trig = stl_geo->GetTriangle(i+1);
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for(int k = 0; k < 3; k++)
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{
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trigs.push_back(ii++);
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auto& pnt = stl_geo->GetPoint(trig[k]);
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for (int l = 0; l < 3; l++)
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{
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float val = pnt[l];
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vertices.push_back(val);
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min[l] = min2(min[l], val);
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max[l] = max2(max[l], val);
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normals.push_back(trig.Normal()[l]);
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}
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}
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trigs.push_back(0);
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}
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py::gil_scoped_acquire ac;
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py::dict res;
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py::list snames;
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for(auto name : surfnames)
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snames.append(py::cast(name));
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res["vertices"] = MoveToNumpy(vertices);
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res["triangles"] = MoveToNumpy(trigs);
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res["normals"] = MoveToNumpy(normals);
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res["surfnames"] = snames;
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res["min"] = MoveToNumpy(min);
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res["max"] = MoveToNumpy(max);
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return res;
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}, py::call_guard<py::gil_scoped_release>())
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;
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m.def("LoadSTLGeometry", FunctionPointer([] (const string & filename)
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{
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ifstream ist(filename);
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return shared_ptr<STLGeometry>(STLGeometry::Load(ist));
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}),py::call_guard<py::gil_scoped_release>());
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m.def("GenerateMesh", FunctionPointer([] (shared_ptr<STLGeometry> geo, MeshingParameters ¶m)
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{
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auto mesh = make_shared<Mesh>();
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SetGlobalMesh(mesh);
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mesh->SetGeometry(geo);
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ng_geometry = geo;
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try
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{
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geo->GenerateMesh(mesh,param);
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}
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catch (NgException ex)
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{
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cout << "Caught NgException: " << ex.What() << endl;
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}
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return mesh;
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}),py::call_guard<py::gil_scoped_release>())
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;
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}
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PYBIND11_MODULE(libstl, m) {
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ExportSTL(m);
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}
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#endif
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