diff --git a/include/convert_to_biu.h b/include/convert_to_biu.h
new file mode 100644
index 0000000000..8fc2281fa9
--- /dev/null
+++ b/include/convert_to_biu.h
@@ -0,0 +1,38 @@
+#ifndef CONVERT_TO_BIU_H
+#define CONVERT_TO_BIU_H
+
+#include <config.h>     // USE_PCBNEW_NANOMETRES is defined here
+
+/**
+ * @file convert_to_biu.h
+ */
+
+
+/**
+ * @brief inline convert functions to convert a value in decimils (or mils)
+ * to the internal unit used in pcbnew or cvpcb(nanometer or decimil)
+ * depending on compil option
+ */
+
+/// Convert mils to PCBNEW internal units (iu).
+inline int Mils2iu( int mils )
+{
+#if defined( USE_PCBNEW_NANOMETRES )
+    return int( mils * 25.4e3 + 0.5 );
+#else
+    return mils * 10;
+#endif
+}
+
+/// Convert deci-mils to PCBNEW internal units (iu).
+inline int DMils2iu( int dmils )
+{
+#if defined( USE_PCBNEW_NANOMETRES )
+    return int( dmils * 25.4e2 + 0.5 );
+#else
+    return dmils;
+#endif
+}
+
+#endif  // #define CONVERT_TO_BIU_H
+
diff --git a/pcbnew/class_board.cpp b/pcbnew/class_board.cpp
index 6be88e0307..1181c4ae12 100644
--- a/pcbnew/class_board.cpp
+++ b/pcbnew/class_board.cpp
@@ -71,13 +71,6 @@ BOARD::BOARD() :
 
 BOARD::~BOARD()
 {
-    /*  @todo
-        NO!  this has nothing to do with a BOARD
-        Do this in the UI, not in the storage container please.
-    if( m_PcbFrame && m_PcbFrame->GetScreen() )
-        m_PcbFrame->GetScreen()->ClearUndoRedoList();
-    */
-
     while( m_ZoneDescriptorList.size() )
     {
         ZONE_CONTAINER* area_to_remove = m_ZoneDescriptorList[0];
diff --git a/pcbnew/class_board.h b/pcbnew/class_board.h
index 0716ac51ea..3dae2934c3 100644
--- a/pcbnew/class_board.h
+++ b/pcbnew/class_board.h
@@ -272,6 +272,14 @@ public:
      */
     static wxString GetDefaultLayerName( int aLayerNumber );
 
+    /**
+     * Function ReturnFlippedLayerNumber
+     * @return the layer number after flipping an item
+     * some (not all) layers: external copper, Mask, Paste, and solder
+     * are swapped between front and back sides
+     */
+    static int ReturnFlippedLayerNumber( int oldlayer );
+
     /**
      * Function Add
      * adds the given item to this BOARD and takes ownership of its memory.
diff --git a/pcbnew/class_dimension.cpp b/pcbnew/class_dimension.cpp
index 6582ad8ad0..d80584c91d 100644
--- a/pcbnew/class_dimension.cpp
+++ b/pcbnew/class_dimension.cpp
@@ -36,7 +36,6 @@
 #include <class_drawpanel.h>
 #include <colors_selection.h>
 #include <kicad_string.h>
-#include <protos.h>
 #include <richio.h>
 
 #include <class_board.h>
@@ -200,7 +199,7 @@ void DIMENSION::Rotate( const wxPoint& aRotCentre, double aAngle )
 void DIMENSION::Flip( const wxPoint& aCentre )
 {
     Mirror( aCentre );
-    SetLayer( ChangeSideNumLayer( GetLayer() ) );
+    SetLayer( BOARD::ReturnFlippedLayerNumber( GetLayer() ) );
 }
 
 
diff --git a/pcbnew/class_drawsegment.cpp b/pcbnew/class_drawsegment.cpp
index a72e569b6a..7c710e179a 100644
--- a/pcbnew/class_drawsegment.cpp
+++ b/pcbnew/class_drawsegment.cpp
@@ -107,7 +107,7 @@ void DRAWSEGMENT::Flip( const wxPoint& aCentre )
         NEGATE( m_Angle );
     }
 
-    SetLayer( ChangeSideNumLayer( GetLayer() ) );
+    SetLayer( BOARD::ReturnFlippedLayerNumber( GetLayer() ) );
 }
 
 
diff --git a/pcbnew/class_mire.cpp b/pcbnew/class_mire.cpp
index e989ef1d27..5a18558e9a 100644
--- a/pcbnew/class_mire.cpp
+++ b/pcbnew/class_mire.cpp
@@ -189,7 +189,7 @@ void PCB_TARGET::Rotate(const wxPoint& aRotCentre, double aAngle)
 void PCB_TARGET::Flip(const wxPoint& aCentre )
 {
     m_Pos.y  = aCentre.y - ( m_Pos.y - aCentre.y );
-    SetLayer( ChangeSideNumLayer( GetLayer() ) );
+    SetLayer( BOARD::ReturnFlippedLayerNumber( GetLayer() ) );
 }
 
 
diff --git a/pcbnew/class_module_transform_functions.cpp b/pcbnew/class_module_transform_functions.cpp
index 171afdfbe1..3bcc462b6c 100644
--- a/pcbnew/class_module_transform_functions.cpp
+++ b/pcbnew/class_module_transform_functions.cpp
@@ -11,15 +11,18 @@
 #include <macros.h>
 
 #include <protos.h>
+#include <class_board.h>
 #include <class_pad.h>
 #include <class_edge_mod.h>
 #include <class_module.h>
 
 
-/* Calculate the layer number for changing cu / cmp layers for Cu / CMP
- * (Copper, Mask, Paste, solder)
+
+/* Returns the layer number after flipping an item
+ * some layers: external copper, Mask, Paste, and solder
+ * are swapped between front and back sides
  */
-int ChangeSideNumLayer( int oldlayer )
+int BOARD::ReturnFlippedLayerNumber( int oldlayer )
 {
     int newlayer;
 
@@ -155,7 +158,7 @@ void MODULE::Flip( const wxPoint& aCentre )
     SetPosition( finalPos );
 
     // Flip layer
-    SetLayer( ChangeSideNumLayer( GetLayer() ) );
+    SetLayer( BOARD::ReturnFlippedLayerNumber( GetLayer() ) );
 
     // Reverse mirror orientation.
     NEGATE( m_Orient );
@@ -174,7 +177,7 @@ void MODULE::Flip( const wxPoint& aCentre )
     pt_texte->m_Mirror = false;
     NEGATE_AND_NORMALIZE_ANGLE_POS( pt_texte->m_Orient );
     pt_texte->SetLayer( GetLayer() );
-    pt_texte->SetLayer( ChangeSideNumLayer( pt_texte->GetLayer() ) );
+    pt_texte->SetLayer( BOARD::ReturnFlippedLayerNumber( pt_texte->GetLayer() ) );
 
     if( GetLayer() == LAYER_N_BACK )
         pt_texte->SetLayer( SILKSCREEN_N_BACK );
@@ -195,7 +198,7 @@ void MODULE::Flip( const wxPoint& aCentre )
     pt_texte->m_Mirror = false;
     NEGATE_AND_NORMALIZE_ANGLE_POS( pt_texte->m_Orient );
     pt_texte->SetLayer( GetLayer() );
-    pt_texte->SetLayer( ChangeSideNumLayer( pt_texte->GetLayer() ) );
+    pt_texte->SetLayer( BOARD::ReturnFlippedLayerNumber( pt_texte->GetLayer() ) );
 
     if( GetLayer() == LAYER_N_BACK )
         pt_texte->SetLayer( SILKSCREEN_N_BACK );
@@ -236,7 +239,7 @@ void MODULE::Flip( const wxPoint& aCentre )
                     em->SetAngle( -em->GetAngle() );
                 }
 
-                em->SetLayer( ChangeSideNumLayer( em->GetLayer() ) );
+                em->SetLayer( BOARD::ReturnFlippedLayerNumber( em->GetLayer() ) );
             }
             break;
 
@@ -251,7 +254,7 @@ void MODULE::Flip( const wxPoint& aCentre )
             NEGATE_AND_NORMALIZE_ANGLE_POS( pt_texte->m_Orient );
 
             pt_texte->SetLayer( GetLayer() );
-            pt_texte->SetLayer( ChangeSideNumLayer( pt_texte->GetLayer() ) );
+            pt_texte->SetLayer( BOARD::ReturnFlippedLayerNumber( pt_texte->GetLayer() ) );
 
             if( GetLayer() == LAYER_N_BACK )
                 pt_texte->SetLayer( SILKSCREEN_N_BACK );
diff --git a/pcbnew/class_pcb_text.cpp b/pcbnew/class_pcb_text.cpp
index ccda388b71..bc9d559fc3 100644
--- a/pcbnew/class_pcb_text.cpp
+++ b/pcbnew/class_pcb_text.cpp
@@ -165,7 +165,7 @@ void TEXTE_PCB::Flip(const wxPoint& aCentre )
     {
         m_Mirror = not m_Mirror;      /* inverse mirror */
     }
-    SetLayer( ChangeSideNumLayer( GetLayer() ) );
+    SetLayer( BOARD::ReturnFlippedLayerNumber( GetLayer() ) );
 }
 
 
diff --git a/pcbnew/class_track.cpp b/pcbnew/class_track.cpp
index 218f6ecd49..dbe2e80ee7 100644
--- a/pcbnew/class_track.cpp
+++ b/pcbnew/class_track.cpp
@@ -392,7 +392,7 @@ void TRACK::Flip( const wxPoint& aCentre )
     }
     else
     {
-        SetLayer( ChangeSideNumLayer( GetLayer() ) );
+        SetLayer( BOARD::ReturnFlippedLayerNumber( GetLayer() ) );
     }
 }
 
diff --git a/pcbnew/class_zone.cpp b/pcbnew/class_zone.cpp
index f893b21bb5..4355257d88 100644
--- a/pcbnew/class_zone.cpp
+++ b/pcbnew/class_zone.cpp
@@ -824,7 +824,7 @@ void ZONE_CONTAINER::Rotate( const wxPoint& centre, double angle )
 void ZONE_CONTAINER::Flip( const wxPoint& aCentre )
 {
     Mirror( aCentre );
-    SetLayer( ChangeSideNumLayer( GetLayer() ) );
+    SetLayer( BOARD::ReturnFlippedLayerNumber( GetLayer() ) );
 }
 
 
@@ -876,7 +876,8 @@ void ZONE_CONTAINER::Copy( ZONE_CONTAINER* src )
     m_PadConnection = src->m_PadConnection;
     m_ThermalReliefGap = src->m_ThermalReliefGap;
     m_ThermalReliefCopperBridge = src->m_ThermalReliefCopperBridge;
-    m_Poly->m_HatchStyle = src->m_Poly->GetHatchStyle();
+    m_Poly->SetHatchStyle( src->m_Poly->GetHatchStyle() );
+    m_Poly->SetHatchPitch( src->m_Poly->GetHatchPitch() );
     m_Poly->m_HatchLines = src->m_Poly->m_HatchLines;   // Copy vector <CSegment>
     m_FilledPolysList.clear();
     m_FilledPolysList = src->m_FilledPolysList;
diff --git a/pcbnew/class_zone_settings.cpp b/pcbnew/class_zone_settings.cpp
index aadefdc5d6..845f8b4b50 100644
--- a/pcbnew/class_zone_settings.cpp
+++ b/pcbnew/class_zone_settings.cpp
@@ -73,7 +73,7 @@ void ZONE_SETTINGS::ExportSetting( ZONE_CONTAINER& aTarget, bool aFullExport ) c
     aTarget.m_FillMode = m_FillMode;
     aTarget.m_ZoneClearance    = m_ZoneClearance;
     aTarget.m_ZoneMinThickness = m_ZoneMinThickness;
-    aTarget.m_Poly->SetHatch( m_Zone_HatchingStyle );
+    aTarget.m_Poly->SetHatch( m_Zone_HatchingStyle, Mils2iu( 20 ) );
     aTarget.m_ArcToSegmentsCount = m_ArcToSegmentsCount;
     aTarget.m_ThermalReliefGap = m_ThermalReliefGap;
     aTarget.m_ThermalReliefCopperBridge = m_ThermalReliefCopperBridge;
diff --git a/pcbnew/item_io.cpp b/pcbnew/item_io.cpp
index a3121514be..d145a2e213 100644
--- a/pcbnew/item_io.cpp
+++ b/pcbnew/item_io.cpp
@@ -1980,7 +1980,7 @@ int ZONE_CONTAINER::ReadDescr( LINE_READER* aReader )
     }
 
     // Set hatch here, when outlines corners are read
-    m_Poly->SetHatch( outline_hatch );
+    m_Poly->SetHatch( outline_hatch, Mils2iu( m_Poly->GetDefaultHatchPitchMils() ) );
 
     return error ? 0 : 1;
 }
diff --git a/pcbnew/legacy_plugin.cpp b/pcbnew/legacy_plugin.cpp
index 896887a3b0..8f5626634c 100644
--- a/pcbnew/legacy_plugin.cpp
+++ b/pcbnew/legacy_plugin.cpp
@@ -3,7 +3,7 @@
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
  * Copyright (C) 2007-2011 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
- * Copyright (C) 2004 Jean-Pierre Charras, jaen-pierre.charras@gipsa-lab.inpg.com
+ * Copyright (C) 2004 Jean-Pierre Charras, jean-pierre.charras@gipsa-lab.inpg.fr
  * Copyright (C) 1992-2011 KiCad Developers, see change_log.txt for contributors.
 
  *
@@ -82,7 +82,7 @@
 #include <3d_struct.h>
 #include <pcb_plot_params.h>
 #include <drawtxt.h>
-
+#include <convert_to_biu.h>
 #include <trigo.h>
 
 #include <wx/ffile.h>
@@ -2286,7 +2286,8 @@ void LEGACY_PLUGIN::loadZONE_CONTAINER()
                 }
 
                 // Set hatch here, after outlines corners are read
-                zc->m_Poly->SetHatch( outline_hatch );
+                zc->m_Poly->SetHatch( outline_hatch,
+                                      Mils2iu( zc->m_Poly->GetDefaultHatchPitchMils() ) );
 
                 m_board->Add( zc.release() );
             }
diff --git a/pcbnew/modules.cpp b/pcbnew/modules.cpp
index b36315324a..379189e01a 100644
--- a/pcbnew/modules.cpp
+++ b/pcbnew/modules.cpp
@@ -44,6 +44,8 @@
 #include <drag.h>
 
 
+static void MoveFootprint( EDA_DRAW_PANEL* aPanel, wxDC* aDC,
+                           const wxPoint& aPosition, bool aErase );
 static void Abort_MoveOrCopyModule( EDA_DRAW_PANEL* Panel, wxDC* DC );
 
 
diff --git a/pcbnew/pcbnew.h b/pcbnew/pcbnew.h
index e013189886..9759ee4b4c 100644
--- a/pcbnew/pcbnew.h
+++ b/pcbnew/pcbnew.h
@@ -8,7 +8,7 @@
 
 #include <fctsys.h>         // PCB_INTERNAL_UNIT and EESCHEMA_INTERNAL_UNIT definitions.
 #include <base_struct.h>    // IS_DRAGGED and IN_EDIT definitions.
-
+#include <convert_to_biu.h> // to define DMils2iu() conversion function
 
 #define U_PCB (PCB_INTERNAL_UNIT / EESCHEMA_INTERNAL_UNIT)
 
@@ -34,19 +34,6 @@
 #define DIM_ANCRE_TEXTE  2       /* Anchor size (Text center) */
 
 
-#if defined(PCBNEW)
-/// Convert deci-mils to PCBNEW internal units (iu).
-inline int DMils2iu( int dmils )
-{
-#if defined( USE_PCBNEW_NANOMETRES )
-    return int( dmils * 25.4e2 + 0.5 );
-#else
-    return dmils;
-#endif
-}
-#endif
-
-
 #define TEXTS_MIN_SIZE  DMils2iu( 50 )      ///< Minimum text size in Pcbnew units value (50 * 0.0001 mils)
 #define TEXTS_MAX_SIZE  DMils2iu( 10000 )   ///< Maximum text size in Pcbnew units value (1 inch) )
 #define TEXTS_MAX_WIDTH DMils2iu( 5000 )    ///< Maximum text width in Pcbnew units value (0.5 inches)
diff --git a/pcbnew/protos.h b/pcbnew/protos.h
index 2e1a0948ac..611f26cdba 100644
--- a/pcbnew/protos.h
+++ b/pcbnew/protos.h
@@ -6,18 +6,13 @@
 #define PROTO_H
 
 
-#include <vector>
-
-
 class wxDC;
 class wxPoint;
 class EDA_DRAW_PANEL;
 class BOARD_ITEM;
-class D_PAD;
 class TRACK;
 class MODULE;
 
-
 /**
  * Function SwapData
  * Used in undo / redo command:
@@ -63,15 +58,7 @@ void DrawTraces( EDA_DRAW_PANEL* panel,
  */
 int ChangeSideMaskLayer( int aMask );
 
-/**
- * Function ChangeSideNumLayer
- * calculates the layer number for changing cu / cmp layers for Cu / CMP.
- * (Copper, Mask, Paste, solder)
- */
-int ChangeSideNumLayer( int oldlayer );
-
 void DrawModuleOutlines( EDA_DRAW_PANEL* panel, wxDC* DC, MODULE* module );
-void MoveFootprint( EDA_DRAW_PANEL* aPanel, wxDC* aDC, const wxPoint& aPosition, bool aErase );
 
 
 /****************/
diff --git a/pcbnew/zone_filling_algorithm.cpp b/pcbnew/zone_filling_algorithm.cpp
index 921974db12..38e626c46c 100644
--- a/pcbnew/zone_filling_algorithm.cpp
+++ b/pcbnew/zone_filling_algorithm.cpp
@@ -14,7 +14,6 @@
 
 #include <pcbnew.h>
 #include <zones.h>
-#include <protos.h>
 
 /* Local functions */
 
diff --git a/polygon/PolyLine.cpp b/polygon/PolyLine.cpp
index 2d5cbdaaf9..7efda63ff0 100644
--- a/polygon/PolyLine.cpp
+++ b/polygon/PolyLine.cpp
@@ -8,18 +8,11 @@
 #include <algorithm>
 
 #include <fctsys.h>
-#include <config.h>     // to define KICAD_NANOMETRE
 
 #include <PolyLine.h>
 #include <bezier_curves.h>
 #include <polygon_test_point_inside.h>
 
-#if defined(KICAD_NANOMETRE)
-#define PCBU_PER_MIL    (1000.0*25.4)
-#else
-#define PCBU_PER_MIL    10
-#endif
-
 
 #define to_int( x ) wxRound( (x) )
 
@@ -34,7 +27,8 @@
 
 CPolyLine::CPolyLine()
 {
-    m_HatchStyle = 0;
+    m_hatchStyle = NO_HATCH;
+    m_hatchPitch = 0;
     m_Width = 0;
     utility = 0;
     m_Kbool_Poly_Engine = NULL;
@@ -794,7 +788,7 @@ int CPolyLine::RestoreArcs( std::vector<CArc> * arc_array, std::vector<CPolyLine
 void CPolyLine::Start( int layer, int x, int y, int hatch )
 {
     m_layer      = layer;
-    m_HatchStyle = hatch;
+    SetHatchStyle( (enum hatch_style) hatch );
     CPolyPt poly_pt( x, y );
     poly_pt.end_contour = false;
 
@@ -1379,7 +1373,7 @@ void CPolyLine::Hatch()
 {
     m_HatchLines.clear();
 
-    if( m_HatchStyle == NO_HATCH )
+    if( m_hatchStyle == NO_HATCH || m_hatchPitch == 0 )
         return;
 
     if( !GetClosed() )   // If not closed, the poly is beeing created and not finalised. Not not hatch
@@ -1404,13 +1398,13 @@ void CPolyLine::Hatch()
 
     // Calculate spacing betwwen 2 hatch lines
     int    spacing;
-    if( m_HatchStyle == DIAGONAL_EDGE )
-        spacing = 20 * PCBU_PER_MIL;
+    if( m_hatchStyle == DIAGONAL_EDGE )
+        spacing = m_hatchPitch;
     else
-        spacing = 50 * PCBU_PER_MIL;
+        spacing = m_hatchPitch * 2;
 
     // set the "lenght" of hatch lines (the lenght on horizontal axis)
-    double hatch_line_len = 20 * PCBU_PER_MIL;
+    double hatch_line_len = m_hatchPitch;
 
     // To have a better look, give a slope depending on the layer
     int layer = GetLayer();
@@ -1438,7 +1432,7 @@ void CPolyLine::Hatch()
     int nc = corner.size();
 
     // loop through hatch lines
-    #define MAXPTS 200      // Usually we store only few values
+    #define MAXPTS 200      // Usually we store only few values per one hatch line
                             // depending on the compexity of the zone outline
 
     static std::vector <CPoint> pointbuffer;
@@ -1514,7 +1508,7 @@ void CPolyLine::Hatch()
             // Push only one line for diagonal hatch,
             // or for small lines < twice the line len
             // else push 2 small lines
-            if( m_HatchStyle == DIAGONAL_FULL || fabs( dx ) < 2 * hatch_line_len )
+            if( m_hatchStyle == DIAGONAL_FULL || fabs( dx ) < 2 * hatch_line_len )
             {
                 m_HatchLines.push_back( CSegment( pointbuffer[ip].x,
                                                   pointbuffer[ip].y,
@@ -1583,7 +1577,8 @@ bool CPolyLine::TestPointInside( int px, int py )
 void CPolyLine::Copy( CPolyLine* src )
 {
     UnHatch();
-    m_HatchStyle = src->m_HatchStyle;
+    m_hatchStyle = src->m_hatchStyle;
+    m_hatchPitch = src->m_hatchPitch;
     // copy corners, using vector copy
     corner = src->corner;
     // copy side styles, using vector copy
diff --git a/polygon/PolyLine.h b/polygon/PolyLine.h
index 827ff0ae85..fc44f87755 100644
--- a/polygon/PolyLine.h
+++ b/polygon/PolyLine.h
@@ -108,8 +108,8 @@ public:
 class CPolyLine
 {
 public:
-    enum { STRAIGHT, ARC_CW, ARC_CCW };                 // side styles
-    enum { NO_HATCH, DIAGONAL_FULL, DIAGONAL_EDGE };    // hatch styles
+    enum side_style { STRAIGHT, ARC_CW, ARC_CCW };                 // side styles
+    enum hatch_style { NO_HATCH, DIAGONAL_FULL, DIAGONAL_EDGE };    // hatch styles
 
     // constructors/destructor
     CPolyLine();
@@ -180,13 +180,25 @@ public:
     int        GetUtility( int ic ) { return corner[ic].utility; };
     void       SetUtility( int ic, int utility ) { corner[ic].utility = utility; };
     int        GetSideStyle( int is );
+    int        GetHatchPitch() { return m_hatchPitch; }
+    int        GetDefaultHatchPitchMils() { return 20; }   // default hatch pitch value in mils
 
-    int        GetHatchStyle() { return m_HatchStyle; }
-    void       SetHatch( int hatch ) { m_HatchStyle = hatch; Hatch(); };
+    enum hatch_style GetHatchStyle() { return m_hatchStyle; }
+    void       SetHatch( int hatch, int pitch )
+                {
+                    SetHatchPitch( pitch );
+                    m_hatchStyle = (enum hatch_style ) hatch;
+                    Hatch();
+                }
     void       SetX( int ic, int x );
     void       SetY( int ic, int y );
     void       SetEndContour( int ic, bool end_contour );
     void       SetSideStyle( int is, int style );
+    void       SetHatchStyle( enum hatch_style style )
+                {
+                    m_hatchStyle = style;
+                }
+    void       SetHatchPitch( int pitch ) { m_hatchPitch = pitch; }
 
     int        RestoreArcs( std::vector<CArc> * arc_array, std::vector<CPolyLine*> * pa = NULL );
 
@@ -260,15 +272,18 @@ public:
 
 
 private:
-    int m_layer;    // layer to draw on
-    int m_Width;    // lines width when drawing. Provided but not really used
+    int m_layer;        // layer to draw on
+    int m_Width;        // lines width when drawing. Provided but not really used
+    enum hatch_style m_hatchStyle;                           // hatch style, see enum above
+    int m_hatchPitch;   // for DIAGONAL_EDGE hatched outlines, basic distance between 2 hatch lines
+                        // and the len of eacvh segment
+                        // for DIAGONAL_FULL, the pitch is twice this value
     int utility;
     Bool_Engine* m_Kbool_Poly_Engine; // polygons set in kbool engine data
 
 public:
     std::vector <CPolyPt>  corner;              // array of points for corners
     std::vector <int>      side_style;          // array of styles for sides
-    int m_HatchStyle;                           // hatch style, see enum above
     std::vector <CSegment> m_HatchLines;        // hatch lines
 };