diff --git a/vcg/complex/algorithms/parametrization/uv_utils.h b/vcg/complex/algorithms/parametrization/uv_utils.h
index cd9b4b5b..8157c68a 100644
--- a/vcg/complex/algorithms/parametrization/uv_utils.h
+++ b/vcg/complex/algorithms/parametrization/uv_utils.h
@@ -27,6 +27,8 @@
 
 namespace vcg {
 	namespace tri{
+
+		///calculate the BBox in UV space
 		template <class MeshType>
 		vcg::Box2<typename MeshType::ScalarType> PerWedgeUVBox(MeshType &m)
 		{
@@ -40,6 +42,25 @@ namespace vcg {
 			}
 			return UVBox;
 		}
+
+		///transform curvature to UV space
+		template <class FaceType>
+		vcg::Point2<typename FaceType::ScalarType> Coord3DtoUV(FaceType &f,
+														typename FaceType::CoordType dir)
+		{
+			///then transform to UV
+			CoordType bary3d=(f.P(0)+f.P(1)+f.P(2))/3.0;
+			vcg::Point2<ScalarType> baryUV=(f.WT(0).P()+f.WT(1).P()+f.WT(2).P())/3.0;
+			CoordType dir3d=bary3d+dir;
+			CoordType baryCoordsUV;
+			vcg::InterpolationParameters<FaceType,ScalarType>(f,dir3d,baryCoordsUV);
+			vcg::Point2<ScalarType> dirUV=baryCoordsUV.X()*f.WT(0).P()+
+											baryCoordsUV.Y()*f.WT(1).P()+
+											baryCoordsUV.Z()*f.WT(2).P()-baryUV;
+			dirUV.Normalize();
+			return dirUV;
+		}
+
 } //End Namespace Tri
 } // End Namespace vcg
 #endif
\ No newline at end of file