diff --git a/EGkVector3d.h b/EGkVector3d.h
index d5b0dca..2d04dba 100644
--- a/EGkVector3d.h
+++ b/EGkVector3d.h
@@ -172,6 +172,11 @@ EGK_EXPORT Vector3d FromPolar( double dLen, double dAngDeg) ;
 //----------------------------------------------------------------------------
 EGK_EXPORT Vector3d FromUprightOrtho( const Vector3d& vtV) ;
 
+//----------------------------------------------------------------------------
+//! Definizione come ortogonale al primo ricevuto, orizzontale e pił vicino al secondo
+//----------------------------------------------------------------------------
+EGK_EXPORT Vector3d FromNearestHorizontalOrtho( const Vector3d& vtV, const Vector3d& vtNear) ;
+
 //----------------------------------------------------------------------------
 //! Opposto di un vettore
 //----------------------------------------------------------------------------