diff --git a/EGkPolyLine.h b/EGkPolyLine.h
index 1baa2e6..34c11e6 100644
--- a/EGkPolyLine.h
+++ b/EGkPolyLine.h
@@ -109,6 +109,8 @@ class PolyLine
       EGK_EXPORT bool MakeConvex( const Vector3d& vtN,  bool bLeftSide) ;
       EGK_EXPORT bool Invert( bool bInvertU = true) ;
       EGK_EXPORT bool Flatten( double dZ = 0) ;
+      EGK_EXPORT bool GetConvexHullXY( PNTVECTOR& vConvHull) const ;
+      EGK_EXPORT bool GetMinAreaRectangleXY( Point3d& ptCen, Vector3d& vtAx, double& dLen, double& dHeight) const ;
 
    private :
       int      m_nRejected ;
diff --git a/EInAPI.h b/EInAPI.h
index 0ec3bc0..6a97b85 100644
--- a/EInAPI.h
+++ b/EInAPI.h
@@ -428,6 +428,8 @@ EIN_EXPORT BOOL __stdcall EgtCurveNearestExtremityToPoint( int nId, const double
 EIN_EXPORT BOOL __stdcall EgtCurveExtrusion( int nId, int nRefId, double vtExtr[3]) ;
 EIN_EXPORT BOOL __stdcall EgtCurveThickness( int nId, double* pdThick) ;
 EIN_EXPORT BOOL __stdcall EgtCurveSelfIntersCount( int nId, int* pnCount) ;
+EIN_EXPORT BOOL __stdcall EgtCurveMinAreaRectangleXY( int nId, int nRefId,
+                             double ptOrig[3], double vtX[3], double vtY[3], double vtZ[3], double* pdDimX, double* pdDimY) ;
 EIN_EXPORT int  __stdcall EgtClosedCurveClassify( int nId1, int nId2) ;
 EIN_EXPORT BOOL __stdcall EgtGetMinDistPointCurve( const double ptP[3], int nId, double* pdDist, double* pdU) ;
 EIN_EXPORT BOOL __stdcall EgtGetMinDistPntSidePointCurve( const double ptP[3], int nId, const double vtN[3],
diff --git a/EXeExecutor.h b/EXeExecutor.h
index 6bf5db0..e987e46 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -406,6 +406,7 @@ EXE_EXPORT int  ExeSplitCurveAtPoint( int nId, const Point3d& ptOn, int nRefType
 EXE_EXPORT int  ExeSplitCurveAtParam( int nId, double dParam) ;
 EXE_EXPORT int  ExeSplitCurveAtCorners( int nId, double dTgAngToler, int* pnCount) ;
 EXE_EXPORT int  ExeSplitCurveAtSelfInters( int nId, int* pnCount) ;
+EXE_EXPORT int  ExeGetCurveLinearConvexHullXY( int nId, double dLinTol, int nRefType) ;
 EXE_EXPORT bool ExeModifyCircleCP( int nId, const Point3d& ptOn, int nRefType) ;
 EXE_EXPORT bool ExeModifyArcRadius( int nId, double dRad) ;
 EXE_EXPORT bool ExeModifyArcC2P( int nId, const Point3d& ptEnd, int nRefType) ;
@@ -465,6 +466,7 @@ EXE_EXPORT bool ExeCurveNearestExtremityToPoint( int nId, const Point3d& ptP, bo
 EXE_EXPORT bool ExeCurveExtrusion( int nId, int nRefId, Vector3d& vtExtr) ;
 EXE_EXPORT bool ExeCurveThickness( int nId, double* pdThick) ;
 EXE_EXPORT bool ExeCurveSelfIntersCount( int nId, int* pnCount) ;
+EXE_EXPORT bool ExeCurveMinAreaRectangleXY( int nId, int nRefId, Frame3d& frRect, double& dDimX, double& dDimY) ;
 EXE_EXPORT int  ExeClosedCurveClassify( int nId1, int nId2) ;
 EXE_EXPORT bool ExeGetMinDistPointCurve( const Point3d& ptP, int nId, double* pdDist, double* pdU) ;
 EXE_EXPORT bool ExeGetMinDistPntSidePointCurve( const Point3d& ptP, int nId, const Vector3d& vtN,