Fem: add feature off vtk unstructured mesh import and export

src/Mod/Fem/App/AppFemPy.cpp

@@ -67,6 +67,7 @@
 #include "FemMeshPy.h"
 #ifdef FC_USE_VTK
 #include "FemPostPipeline.h"
+#include "FemVTKTools.h"
 #endif
 
 #include <cstdlib>
@@ -93,6 +94,11 @@ class Module : public Py::ExtensionModule<Module>
         add_varargs_method("read",&Module::read,
             "Read a mesh from a file and returns a Mesh object."
         );
+#ifdef FC_USE_VTK
+        add_varargs_method("readCfdResult",&Module::readCfdResult,
+            "Read a CFD result from a file and returns a Result object."
+        );
+#endif
         add_varargs_method("show",&Module::show,
             "show(shape) -- Add the shape to the active document or create one if no document exists."
         );
@@ -236,6 +242,30 @@ class Module : public Py::ExtensionModule<Module>
         mesh->read(EncodedName.c_str());
         return Py::asObject(new FemMeshPy(mesh.release()));
     }
+
+#ifdef FC_USE_VTK
+    Py::Object readCfdResult(const Py::Tuple& args)
+    {
+        PyObject *pcObj;
+        char* Name; // PythonFeatureT<FemResultObject> is of type `App::DocumentObjectPy`
+        if (!PyArg_ParseTuple(args.ptr(), "etO","utf-8", &Name, &(App::DocumentObjectPy::Type), &pcObj))
+            throw Py::Exception();
+        std::string EncodedName = std::string(Name);
+        PyMem_Free(Name);
+        // this function needs the second parameter: App::DocumentObjectPy, since it is created in python
+        if (pcObj)
+        {
+            //App::DocumentObjectPy objpy(pcObj);
+            App::DocumentObject* obj = static_cast<App::DocumentObjectPy*>(pcObj)->getDocumentObjectPtr();
+            FemVTKTools::readFluidicResult(EncodedName.c_str(), obj);
+        }
+        else
+            FemVTKTools::readFluidicResult(EncodedName.c_str());
+
+        return Py::None();
+    }
+#endif
+
     Py::Object show(const Py::Tuple& args)
     {
         PyObject *pcObj;

src/Mod/Fem/App/CMakeLists.txt

@@ -240,6 +240,8 @@ if(BUILD_FEM_VTK)
         FemPostFilter.cpp
         FemPostFunction.h
         FemPostFunction.cpp
+        FemVTKTools.h
+        FemVTKTools.cpp
     )
     SOURCE_GROUP("PostObjects" FILES ${FemPost_SRCS})
 endif(BUILD_FEM_VTK)

src/Mod/Fem/App/FemMesh.cpp

@@ -49,6 +49,9 @@
 #include <Mod/Mesh/App/Core/Iterator.h>
 
 #include "FemMesh.h"
+#ifdef FC_USE_VTK
+    #include "FemVTKTools.h"
+#endif
 
 #include <boost/assign/list_of.hpp>
 #include <SMESH_Gen.hxx>
@@ -898,6 +901,12 @@ void FemMesh::read(const char *FileName)
         // read Nastran-file
         readNastran(File.filePath());
     }
+#ifdef FC_USE_VTK
+    else if (File.hasExtension("vtk") || File.hasExtension("vtu")) {
+        // read *.vtk legacy format or *.vtu XML unstructure Mesh
+        FemVTKTools::readVTKMesh(File.filePath().c_str(), this);
+    }
+#endif
     else{
         throw Base::Exception("Unknown extension");
     }
@@ -1185,6 +1194,12 @@ void FemMesh::write(const char *FileName) const
         // write ABAQUS Output
         writeABAQUS(File.filePath());
     }
+#ifdef FC_USE_VTK
+    else if (File.hasExtension("vtk") || File.hasExtension("vtu") ) {
+        // write unstructure mesh to VTK format *.vtk and *.vtu
+        FemVTKTools::writeVTKMesh(File.filePath().c_str(), this);
+    }
+#endif
     else{
         throw Base::Exception("Unknown extension");
     }