diff --git a/EGkBBox3d.h b/EGkBBox3d.h
index 678d365..b363bf2 100644
--- a/EGkBBox3d.h
+++ b/EGkBBox3d.h
@@ -100,6 +100,18 @@ class EGK_EXPORT BBox3d
                 if ( dSqDist < EPS_ZERO)
                    return 0 ;
                 return sqrt( dSqDist) ; }
+      double SqMaxDistFromPoint( const Point3d& ptP) const ;
+      double SqMaxDistFromPointXY( const Point3d& ptP) const ;
+      double MaxDistFromPoint( const Point3d& ptP) const
+              { double dSqDist = SqMaxDistFromPoint( ptP) ;
+                if ( dSqDist < EPS_ZERO)
+                   return 0 ;
+                return sqrt( dSqDist) ; }
+      double MaxDistFromPointXY( const Point3d& ptP) const
+              { double dSqDist = SqMaxDistFromPointXY( ptP) ;
+                if ( dSqDist < EPS_ZERO)
+                   return 0 ;
+                return sqrt( dSqDist) ; }
 
    private :
       bool IsValid( void) const ;
diff --git a/EGkIntersLineSurfTm.h b/EGkIntersLineSurfTm.h
index cdfbe9a..7ba7a02 100644
--- a/EGkIntersLineSurfTm.h
+++ b/EGkIntersLineSurfTm.h
@@ -46,4 +46,4 @@ typedef std::vector<IntLinStmInfo>  ILSIVECTOR ;
  
 //-----------------------------------------------------------------------------
 EGK_EXPORT bool IntersLineSurfTm( const Point3d& ptL, const Vector3d& vtL, double dLen, const ISurfTriMesh& Stm,
-                                  ILSIVECTOR& vInfo) ;
+                                  ILSIVECTOR& vInfo, bool bFinite = true) ;
diff --git a/EInAPI.h b/EInAPI.h
index 7ba8f3c..458f630 100644
--- a/EInAPI.h
+++ b/EInAPI.h
@@ -479,8 +479,11 @@ EIN_EXPORT BOOL __stdcall EgtSurfTmFacetNearestMidPoint( int nId, int nFacet, co
                                                          double ptMid[3], double vtNorm[3]) ;
 EIN_EXPORT BOOL __stdcall EgtSurfTmFacetCenter( int nId, int nFacet, int nRefId, double ptCen[3], double vtNorm[3]) ;
 EIN_EXPORT BOOL __stdcall EgtSurfTmFacetNormVersor( int nId, int nFacet, int nRefId, double vtNorm[3]) ;
+EIN_EXPORT BOOL __stdcall EgtSurfTmFacetOppositeSide( int nId, int nFacet, const double vtDir[3], int nRefId, double ptP1[3], double ptP2[3]) ;
 EIN_EXPORT BOOL __stdcall EgtSurfTmFacetAdjacencies( int nId, int nFacet, int*& vAdj, int* pnCount) ;
 EIN_EXPORT BOOL __stdcall EgtSurfTmFacetsContact( int nId, int nF1, int nF2, int nRefId, bool* pbAdjac, double ptP1[3], double ptP2[3], double* pdAng) ;
+EIN_EXPORT BOOL __stdcall EgtSurfTmLineInters( int nId, const double ptP[3], const double vtDir[3], int nRefType,
+                                               int*& vFlagInters, double*& vParInters, int* pnCount) ;
 EIN_EXPORT BOOL __stdcall EgtTextNormVersor( int nId, int nRefId, double vtNorm[3]) ;
 EIN_EXPORT BOOL __stdcall EgtTextGetContent( int nId, wchar_t*& wsText) ;
 EIN_EXPORT BOOL __stdcall EgtTextGetFont( int nId, wchar_t*& wsFont) ;
diff --git a/EXeConst.h b/EXeConst.h
index 6c5bd16..0485f58 100644
--- a/EXeConst.h
+++ b/EXeConst.h
@@ -53,6 +53,14 @@ enum ApprType{ APP_LINES = 0,                // come ICurve::APL_STD
                APP_RIGHT_CONVEX_LINES = 12,  // come ICurve::APL_RIGHT_CONVEX
                APP_ARCS = 3} ;
 
+//----------------- Costanti tipo punto intersezione Linea SurfTriMesh ---------
+enum SLiType { SLT_NONE =  0,
+               SLT_IN =  1,
+               SLT_OUT = 2,
+               SLT_TG_INI = 3,
+               SLT_TG_FIN = 4,
+               SLT_TOUCH = 5} ;
+
 //----------------- Costanti flag import CNC -----------------------------------
 enum EicFlag { EIC_FLAG_NONE = 0,            // come EImCncFlag::EICFLAG_NONE
                EIC_FLAG_CHAIN = 1,           // come EImCncFlag::EICFLAG_CHAIN
diff --git a/EXeExecutor.h b/EXeExecutor.h
index 56eb6c2..780a8df 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -549,6 +549,7 @@ EXE_EXPORT bool ExeSurfTmFacetCenter( int nId, int nFacet, int nRefId, Point3d&
 EXE_EXPORT bool ExeSurfTmFacetNormVersor( int nId, int nFacet, int nRefId, Vector3d& vtNorm) ;
 EXE_EXPORT bool ExeSurfTmFacetOppositeSide( int nId, int nFacet, const Vector3d& vtDir, int nRefId, Point3d& ptP1, Point3d& ptP2) ;
 EXE_EXPORT bool ExeSurfTmFacetsContact( int nId, int nF1, int nF2, int nRefId, bool& bAdjac, Point3d& ptP1, Point3d& ptP2, double& dAng) ;
+EXE_EXPORT bool ExeSurfTmLineInters( int nId, const Point3d& ptP, const Vector3d& vtDir, int nRefType, INTDBLVECTOR& vInters) ;
 EXE_EXPORT bool ExeVolZmapVolume( int nId, double& dVol) ;
 EXE_EXPORT int  ExeVolZmapPartCount( int nId) ;
 EXE_EXPORT bool ExeVolZmapPartVolume( int nId, int nPart, double& dVol) ;
diff --git a/EgtNumCollection.h b/EgtNumCollection.h
index d21bf46..6dd8722 100644
--- a/EgtNumCollection.h
+++ b/EgtNumCollection.h
@@ -1,7 +1,7 @@
 //----------------------------------------------------------------------------
-//  EgalTech 2014-2014
+//  EgalTech 2014-2018
 //----------------------------------------------------------------------------
-// File : EgtNumCollection.h       Data : 02.04.14         Versione : 1.5d1
+// File : EgtNumCollection.h       Data : 21.03.18         Versione : 1.9c3
 // Contenuto : Raccolte di oggetti numerici semplici.       
 //
 //
@@ -36,3 +36,9 @@ typedef std::list<unsigned int>      UINT_LIST ;    // lista di interi senza seg
 // Raccolte di double
 typedef std::vector<double> DBLVECTOR ;      // vettore di double
 typedef std::list<double>   DBLLIST ;        // lista di double
+
+//----------------------------------------------------------------------------
+// Raccolte di coppie integer, double
+typedef std::pair<int,double> INTDBL ;         // coppia flag, parametro 
+typedef std::vector<INTDBL>   INTDBLVECTOR ;   // vettore di coppie flag, parametro
+typedef std::list<INTDBL>     INTDBLLIST ;     // lista di coppie flag, parametro