diff --git a/EgtGeomKernel.rc b/EgtGeomKernel.rc
index e0f7eb1..2164376 100644
Binary files a/EgtGeomKernel.rc and b/EgtGeomKernel.rc differ
diff --git a/Polygon3d.cpp b/Polygon3d.cpp
index 515ab78..997788b 100644
--- a/Polygon3d.cpp
+++ b/Polygon3d.cpp
@@ -15,6 +15,8 @@
 #include "stdafx.h"
 #include "/EgtDev/Include/EgkPolygon3d.h"
 
+using namespace std ;
+
 //----------------------------------------------------------------------------
 bool
 Polygon3d::Clear( void)
@@ -313,3 +315,11 @@ Polygon3d::LocToLoc( const Frame3d& frOri, const Frame3d& frDest)
       ptP.LocToLoc( frOri, frDest) ;
    return true ;
 }
+
+//----------------------------------------------------------------------------
+void
+Polygon3d::Invert( void)
+{
+   reverse( m_vVert.begin(), m_vVert.end()) ;
+   m_Plane.Invert() ;
+}
diff --git a/SurfTriMesh.cpp b/SurfTriMesh.cpp
index b82a7c2..e32e715 100644
--- a/SurfTriMesh.cpp
+++ b/SurfTriMesh.cpp
@@ -964,20 +964,22 @@ SurfTriMesh::CopyFrom( const SurfTriMesh& stmSrc)
 {
    if ( &stmSrc == this)
       return true ;
-   if ( ! Init( stmSrc.GetVertexSize(), stmSrc.GetTriangleSize()))
+   if ( ! Init( stmSrc.GetVertexSize(), stmSrc.GetTriangleSize(), stmSrc.GetFacetSize()))
       return false ;
-   m_vVert = stmSrc.m_vVert ;
-   m_vTria = stmSrc.m_vTria ;
-   m_bOriented = stmSrc.m_bOriented ;
-   m_bClosed = stmSrc.m_bClosed ;
+   m_nStatus = stmSrc.m_nStatus ;
    m_dLinTol = stmSrc.m_dLinTol ;
+   m_dBoundaryAng = stmSrc.m_dBoundaryAng ;
+   m_dCosBndAng = stmSrc.m_dCosBndAng ;
    m_dSmoothAng = stmSrc.m_dSmoothAng ;
    m_dCosSmAng = stmSrc.m_dCosSmAng ;
-   m_nStatus = stmSrc.m_nStatus ;
+   m_bOriented = stmSrc.m_bOriented ;
+   m_bClosed = stmSrc.m_bClosed ;
+   m_bFaceted = stmSrc.m_bFaceted ;
+   m_vVert = stmSrc.m_vVert ;
+   m_vTria = stmSrc.m_vTria ;
+   m_vFacet = stmSrc.m_vFacet ;
    m_nTimeStamp = stmSrc.m_nTimeStamp ;
    m_nTempProp = stmSrc.m_nTempProp ;
-   m_bFaceted = stmSrc.m_bFaceted ;
-   m_vFacet = stmSrc.m_vFacet ;
    m_nParts = stmSrc.m_nParts ;
    return true ;
 }
diff --git a/SurfTriMesh.h b/SurfTriMesh.h
index e0cb2a0..7e7e6a9 100644
--- a/SurfTriMesh.h
+++ b/SurfTriMesh.h
@@ -199,7 +199,7 @@ class SurfTriMesh : public ISurfTriMesh, public IGeoObjRW
 
    public :
       SurfTriMesh( void) ;
-      SurfTriMesh( const SurfTriMesh& stSrc)
+      SurfTriMesh( const SurfTriMesh& stSrc) : m_pHGrd3d( nullptr)
                   { if ( ! CopyFrom( stSrc))
                        LOG_ERROR( GetEGkLogger(), "SurfTriMesh : copy constructor error") }
       SurfTriMesh& operator =( const SurfTriMesh& stSrc)