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Merge branch 'from_pyocc' into 'master'

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add From_PyOCC function to convert swig pyocc shape to netgen.occ

See merge request ngsolve/netgen!703
This commit is contained in:
Schöberl, Joachim 2025-03-17 15:21:44 +01:00
commit 951e20a7e4
1 changed files with 26 additions and 0 deletions
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26
libsrc/occ/python_occ_shapes.cpp
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@ -689,6 +689,32 @@ DLL_HEADER void ExportNgOCCShapes(py::module &m)
OCCGeometry::global_shape_properties.clear();
OCCGeometry::global_shape_property_indices.Clear();
});
struct SwigTypeInfo
{
const char* name; // SWIG's type name string
// Other fields...
};
struct SwigPyObject{
PyObject_HEAD
void *ptr;
SwigTypeInfo* ty; // SWIG type information
int own; // ownership flag
};
m.def("From_PyOCC", [](py::object shape)
{
py::object py_this = shape.attr("this");
PyObject* obj = py_this.ptr();
SwigPyObject* swig_obj = reinterpret_cast<SwigPyObject*>(obj);
if (!swig_obj->ptr || !swig_obj->ty || !swig_obj->ty->name) {
throw std::runtime_error("SWIG object does not contain a valid pointer");
}
if(strcmp(swig_obj->ty->name, "_p_TopoDS_Shape") != 0)
throw std::runtime_error("Does not contain TopoDS_Shape from pyocc!");
return py::cast(static_cast<TopoDS_Shape*>(swig_obj->ptr));
}, py::return_value_policy::reference, py::keep_alive<0,1>());
py::class_<TopoDS_Shape> (m, "TopoDS_Shape")
.def("__str__", [] (const TopoDS_Shape & shape)