+ method to get Eigensystem of mesh data

src/Mod/Mesh/App/Mesh.cpp

@@ -790,6 +790,15 @@ void MeshObject::transformToEigenSystem()
     this->setTransform(cMeshEval.Transform());
 }
 
+Base::Matrix4D MeshObject::getEigenSystem(Base::Vector3d& v) const
+{
+    MeshCore::MeshEigensystem cMeshEval(_kernel);
+    cMeshEval.Evaluate();
+    Base::Vector3f uvw = cMeshEval.GetBoundings();
+    v.Set(uvw.x, uvw.y, uvw.z);
+    return cMeshEval.Transform();
+}
+
 void MeshObject::movePoint(unsigned long index, const Base::Vector3d& v)
 {
     // v is a vector, hence we must not apply the translation part

src/Mod/Mesh/App/Mesh.h

@@ -200,6 +200,7 @@ public:
     /// clears the Mesh
     void clear(void);
     void transformToEigenSystem();
+    Base::Matrix4D getEigenSystem(Base::Vector3d& v) const;
     void movePoint(unsigned long, const Base::Vector3d& v);
     void setPoint(unsigned long, const Base::Vector3d& v);
     void smooth(int iterations, float d_max);

src/Mod/Mesh/App/MeshPy.xml

@@ -112,6 +112,11 @@ Example:
 				<UserDocu>Transform the mesh to its eigenbase</UserDocu>
 			</Documentation>
 		</Methode>
+		<Methode Name="getEigenSystem" Const="true">
+			<Documentation>
+				<UserDocu>Get Eigen base of the mesh</UserDocu>
+			</Documentation>
+		</Methode>
 		<Methode Name="addFacet">
 			<Documentation>
 				<UserDocu>Add a facet to the mesh</UserDocu>

src/Mod/Mesh/App/MeshPyImp.cpp

@@ -27,6 +27,7 @@
 #include <Base/Handle.h>
 #include <Base/Builder3D.h>
 #include <Base/GeometryPyCXX.h>
+#include <Base/MatrixPy.h>
 
 #include "Mesh.h"
 #include "MeshPy.h"
@@ -465,6 +466,18 @@ PyObject*  MeshPy::transformToEigen(PyObject *args)
     Py_Return;
 }
 
+PyObject*  MeshPy::getEigenSystem(PyObject *args)
+{
+    if (!PyArg_ParseTuple(args, ""))
+        return NULL;
+    Base::Vector3d vec;
+    Base::Matrix4D mat = getMeshObjectPtr()->getEigenSystem(vec);
+    Py::Tuple t(2);
+    t.setItem(0, Py::Matrix(mat));
+    t.setItem(1, Py::Vector(vec));
+    return Py::new_reference_to(t);
+}
+
 PyObject*  MeshPy::addFacet(PyObject *args)
 {
     double x1,y1,z1,x2,y2,z2,x3,y3,z3;