diff --git a/vcg/math/matrix33.h b/vcg/math/matrix33.h
index 2da2c504..356a10db 100644
--- a/vcg/math/matrix33.h
+++ b/vcg/math/matrix33.h
@@ -75,6 +75,15 @@ public:
           m(i,j)=(*this)[i][j];
     }
 
+    template <class EigenMatrix33Type>
+    EigenMatrix33Type ToEigenMatrix() const {
+      EigenMatrix33Type m;
+      for(int i = 0; i < 3; i++)
+        for(int j = 0; j < 3; j++)
+          m(i,j)=(*this)[i][j];
+      return m;
+    }
+
     template <class EigenMatrix33Type>
     void FromEigenMatrix(const EigenMatrix33Type & m){
       for(int i = 0; i < 3; i++)
@@ -82,6 +91,8 @@ public:
           (*this)[i][j]=m(i,j);
     }
 
+
+
     static inline const Matrix33 &Identity( )
     {
         static Matrix33<S> tmp; tmp.SetIdentity();
diff --git a/vcg/math/matrix44.h b/vcg/math/matrix44.h
index 7ca46188..cb2f8c7c 100644
--- a/vcg/math/matrix44.h
+++ b/vcg/math/matrix44.h
@@ -158,6 +158,15 @@ public:
                 m(i,j)=(*this)[i][j];
     }
 
+    template <class EigenMatrix44Type>
+    EigenMatrix44Type ToEigenMatrix() const {
+        EigenMatrix44Type m;
+        for(int i = 0; i < 4; i++)
+            for(int j = 0; j < 4; j++)
+                m(i,j)=(*this)[i][j];
+        return m;
+    }
+
     template <class EigenMatrix44Type>
     void FromEigenMatrix(const EigenMatrix44Type & m){
         for(int i = 0; i < 4; i++)