diff --git a/vcg/complex/used_types.h b/vcg/complex/used_types.h
new file mode 100755
index 00000000..15369dae
--- /dev/null
+++ b/vcg/complex/used_types.h
@@ -0,0 +1,50 @@
+#ifndef VCG_USED_TYPES_H
+#define VCG_USED_TYPES_H
+
+#include <vcg/space/point3.h>
+#include <vcg/container/derivation_chain.h>
+
+namespace vcg{
+
+struct DummyTypes{
+		typedef char VertexType; 		// simplex types
+		typedef char EdgeType;
+		typedef char FaceType;
+		typedef char TetraType;
+		typedef char HEdgeType; 		// connector types
+
+		typedef vcg::Point3f CoordType; 		// connector types
+		typedef float ScalarType;						// connector types
+
+		typedef VertexType * VertexPointer;
+		typedef EdgeType *	EdgePointer		;
+		typedef FaceType * FacePointer		;
+		typedef TetraType * TetraPointer	;
+		typedef HEdgeType * HEdgePointer	;
+
+		static void Name(std::vector<std::string> & name){}
+		template < class LeftV>
+		void ImportLocal(const LeftV  & left ) {}
+};
+
+template <template <typename> class A = DefaultDeriver, template <typename> class B = DefaultDeriver,
+					template <typename> class C = DefaultDeriver, template <typename> class D = DefaultDeriver,
+					template <typename> class E = DefaultDeriver, template <typename> class F = DefaultDeriver,
+					template <typename> class G = DefaultDeriver, template <typename> class H = DefaultDeriver,
+					template <typename> class I = DefaultDeriver, template <typename> class J = DefaultDeriver,
+					template <typename> class K = DefaultDeriver, template <typename> class L = DefaultDeriver>
+					class UsedTypes: public Arity12<DummyTypes, A, B, C, D, E, F, G, H, I, J, K, L>  {};
+
+
+template <class A>
+	struct Use{
+		template <class T> struct AsVertexType: public T{typedef A VertexType;	typedef VertexType * VertexPointer	;};
+		template <class T> struct AsEdgeType: public T{typedef A EdgeType;			typedef EdgeType *	EdgePointer			;};
+		template <class T> struct AsFaceType: public T{typedef A FaceType;			typedef FaceType * FacePointer			;};
+		template <class T> struct AsTetraType: public T{typedef A TetraType;		typedef TetraType * TetraPointer		;};
+		template <class T> struct AsHEdgeType: public T{typedef A HEdgeType;		typedef HEdgeType * HEdgePointer		;};
+};
+
+};
+
+#endif // USED_TYPES_H