FEM: mesh api, export of z88 mesh file with Fem API

src/Mod/Fem/App/FemMesh.cpp

@@ -42,6 +42,7 @@
 #include <Base/FileInfo.h>
 #include <Base/TimeInfo.h>
 #include <Base/Console.h>
+#include <Base/Interpreter.h>
 #include <App/Application.h>
 
 #include <Mod/Mesh/App/Core/MeshKernel.h>
@@ -80,6 +81,7 @@
 # include <TopoDS_Shape.hxx>
 
 # include <ShapeAnalysis_ShapeTolerance.hxx>
+# include <FemMeshPy.h>
 
 //to simplify parsing input files we use the boost lib
 #include <boost/tokenizer.hpp>
@@ -1191,7 +1193,7 @@ void FemMesh::read(const char *FileName)
 #if SMESH_VERSION_MAJOR < 7
     else if (File.hasExtension("dat") ) {
         // read brep-file
-    // vejmarie disable
+        // vejmarie disable
         myMesh->DATToMesh(File.filePath().c_str());
     }
 #endif
@@ -1600,6 +1602,36 @@ void FemMesh::writeABAQUS(const std::string &Filename, int elemParam, bool group
     }
 }
 
+
+void FemMesh::writeZ88(const std::string &FileName) const
+{
+    Base::TimeInfo Start;
+    Base::Console().Log("Start: FemMesh::writeZ88() =================================\n");
+
+    /*
+    Python command to export FemMesh from StartWB FEM 3D example:
+    import feminout.importZ88Mesh
+    feminout.importZ88Mesh.write(App.ActiveDocument.Box_Mesh.FemMesh, '/tmp/mesh.z88')
+    */
+
+    PyObject* module = PyImport_ImportModule("feminout.importZ88Mesh");
+    if (!module)
+        return;
+    try {
+        Py::Module z88mod(module, true);
+        Py::Object mesh = Py::asObject(new FemMeshPy(const_cast<FemMesh*>(this)));
+        Py::Callable method(z88mod.getAttr("write"));
+        Py::Tuple args(2);
+        args.setItem(0, mesh);
+        args.setItem(1, Py::String(FileName));
+        method.apply(args);
+    }
+    catch (Py::Exception& e) {
+        e.clear();
+    }
+}
+
+
 void FemMesh::write(const char *FileName) const
 {
     Base::FileInfo File(FileName);
@@ -1639,6 +1671,11 @@ void FemMesh::write(const char *FileName) const
         FemVTKTools::writeVTKMesh(File.filePath().c_str(), this);
     }
 #endif
+    else if (File.hasExtension("z88") ) {
+        Base::Console().Log("FEM mesh object will be exported to z88 format.\n");
+        // write z88 file
+        writeZ88(File.filePath());
+    }
     else{
         throw Base::FileException("An unknown file extension was added!");
     }

src/Mod/Fem/App/FemMesh.h

@@ -152,6 +152,7 @@ public:
     void read(const char *FileName);
     void write(const char *FileName) const;
     void writeABAQUS(const std::string &Filename, int elemParam, bool groupParam) const;
+    void writeZ88(const std::string &FileName) const;
 
 private:
     void copyMeshData(const FemMesh&);

src/Mod/Fem/App/FemMeshPy.xml

@@ -66,7 +66,10 @@
         </Methode>
         <Methode Name="write" Const="true">
             <Documentation>
-                <UserDocu>Write out a DAT, UNV, MED or STL file.</UserDocu>
+                <UserDocu>Write out various FEM mesh file formats.
+                    write(file.endingToExportTo)
+                    supported formats: DAT, INP, MED, STL, UNV, VTK, Z88
+                </UserDocu>
             </Documentation>
         </Methode>
         <Methode Name="writeABAQUS" Const="true">

src/Mod/Fem/Init.py

@@ -30,8 +30,9 @@ import FreeCAD
 
 FreeCAD.addExportType("FEM mesh TetGen (*.poly)", "feminout.convert2TetGen")
 
-FreeCAD.addImportType("FEM mesh formats (*.unv *.med *.dat *.bdf)", "Fem")
-FreeCAD.addExportType("FEM mesh formats (*.unv *.med *.stl *.dat *.inp *.vtk *.vtu)", "Fem")
+# see FemMesh::read() and FemMesh::write() methods in src/Mod/Fem/App/FemMesh.cpp
+FreeCAD.addImportType("FEM mesh formats (*.unv *.med *.dat *.bdf *.vtk *.vtu)", "Fem")
+FreeCAD.addExportType("FEM mesh formats (*.unv *.med *.stl *.dat *.inp *.vtk *.vtu *.z88)", "Fem")
 
 FreeCAD.addImportType("FEM mesh CalculiX/Abaqus (*.inp)", "feminout.importInpMesh")
 FreeCAD.addImportType("FEM result CalculiX (*.frd)", "feminout.importCcxFrdResults")
@@ -39,7 +40,7 @@ FreeCAD.addImportType("FEM result CalculiX (*.frd)", "feminout.importCcxFrdResul
 FreeCAD.addImportType("FEM mesh Fenics (*.xml *.xdmf)", "feminout.importFenicsMesh")
 FreeCAD.addExportType("FEM mesh Fenics (*.xml *.xdmf)", "feminout.importFenicsMesh")
 
-FreeCAD.addImportType("FEM mesh Z88 (*i1.txt)", "feminout.importZ88Mesh")
+FreeCAD.addImportType("FEM mesh Z88 (*i1.txt *.z88)", "feminout.importZ88Mesh")
 FreeCAD.addExportType("FEM mesh Z88 (*i1.txt)", "feminout.importZ88Mesh")
 
 FreeCAD.addImportType("FEM result Z88 displacements (*o2.txt)", "feminout.importZ88O2Results")