kicad/pcbnew/class_zone.cpp

/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2015 Jean-Pierre Charras, jp.charras at wanadoo.fr
 * Copyright (C) 2012 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
 * Copyright (C) 1992-2015 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

/**
 * @file class_zone.cpp
 * @brief Implementation of class to handle copper zones.
 */

#include <fctsys.h>
#include <wxstruct.h>
#include <trigo.h>
#include <class_pcb_screen.h>
#include <class_drawpanel.h>
#include <kicad_string.h>
#include <pcbcommon.h>
#include <colors_selection.h>
#include <richio.h>
#include <macros.h>
#include <wxBasePcbFrame.h>
#include <msgpanel.h>

#include <class_board.h>
#include <class_zone.h>

#include <pcbnew.h>
#include <zones.h>
#include <math_for_graphics.h>
#include <polygon_test_point_inside.h>


ZONE_CONTAINER::ZONE_CONTAINER( BOARD* aBoard ) :
    BOARD_CONNECTED_ITEM( aBoard, PCB_ZONE_AREA_T )
{
    m_CornerSelection = -1;
    m_IsFilled = false;                         // fill status : true when the zone is filled
    m_FillMode = 0;                             // How to fill areas: 0 = use filled polygons, != 0 fill with segments
    m_priority = 0;
    m_smoothedPoly = NULL;
    m_cornerSmoothingType = ZONE_SETTINGS::SMOOTHING_NONE;
    SetIsKeepout( false );
    SetDoNotAllowCopperPour( false );           // has meaning only if m_isKeepout == true
    SetDoNotAllowVias( true );                  // has meaning only if m_isKeepout == true
    SetDoNotAllowTracks( true );                // has meaning only if m_isKeepout == true
    m_cornerRadius = 0;
    SetLocalFlags( 0 );                         // flags tempoarry used in zone calculations
    m_Poly     = new CPolyLine();               // Outlines
    aBoard->GetZoneSettings().ExportSetting( *this );
}


ZONE_CONTAINER::ZONE_CONTAINER( const ZONE_CONTAINER& aZone ) :
    BOARD_CONNECTED_ITEM( aZone )
{
    m_smoothedPoly = NULL;

    // Should the copy be on the same net?
    SetNetCode( aZone.GetNetCode() );
    m_Poly = new CPolyLine( *aZone.m_Poly );

    // For corner moving, corner index to drag, or -1 if no selection
    m_CornerSelection = -1;
    m_IsFilled = aZone.m_IsFilled;
    m_ZoneClearance = aZone.m_ZoneClearance;     // clearance value
    m_ZoneMinThickness = aZone.m_ZoneMinThickness;
    m_FillMode = aZone.m_FillMode;               // Filling mode (segments/polygons)
    m_priority = aZone.m_priority;
    m_ArcToSegmentsCount = aZone.m_ArcToSegmentsCount;
    m_PadConnection = aZone.m_PadConnection;
    m_ThermalReliefGap = aZone.m_ThermalReliefGap;
    m_ThermalReliefCopperBridge = aZone.m_ThermalReliefCopperBridge;
    m_FilledPolysList.Append( aZone.m_FilledPolysList );
    m_FillSegmList = aZone.m_FillSegmList;      // vector <> copy

    m_isKeepout = aZone.m_isKeepout;
    m_doNotAllowCopperPour = aZone.m_doNotAllowCopperPour;
    m_doNotAllowVias = aZone.m_doNotAllowVias;
    m_doNotAllowTracks = aZone.m_doNotAllowTracks;

    m_cornerSmoothingType = aZone.m_cornerSmoothingType;
    m_cornerRadius = aZone.m_cornerRadius;

    SetLocalFlags( aZone.GetLocalFlags() );
}


ZONE_CONTAINER::~ZONE_CONTAINER()
{
    delete m_Poly;
    m_Poly = NULL;
}


EDA_ITEM* ZONE_CONTAINER::Clone() const
{
    return new ZONE_CONTAINER( *this );
}


bool ZONE_CONTAINER::UnFill()
{
    bool change = ( m_FilledPolysList.GetCornersCount() > 0 ) ||
                  ( m_FillSegmList.size() > 0 );

    m_FilledPolysList.RemoveAllContours();
    m_FillSegmList.clear();
    m_IsFilled = false;

    return change;
}


const wxPoint& ZONE_CONTAINER::GetPosition() const
{
    static const wxPoint dummy;

    return m_Poly ? GetCornerPosition( 0 ) : dummy;
}


void ZONE_CONTAINER::Draw( EDA_DRAW_PANEL* panel, wxDC* DC, GR_DRAWMODE aDrawMode,
                           const wxPoint& offset )
{
    if( !DC )
        return;

    wxPoint     seg_start, seg_end;
    LAYER_ID    curr_layer = ( (PCB_SCREEN*) panel->GetScreen() )->m_Active_Layer;
    BOARD*      brd   = GetBoard();

    EDA_COLOR_T color = brd->GetLayerColor( m_Layer );

    if( brd->IsLayerVisible( m_Layer ) == false && ( color & HIGHLIGHT_FLAG ) != HIGHLIGHT_FLAG )
        return;

    GRSetDrawMode( DC, aDrawMode );
    DISPLAY_OPTIONS* displ_opts = (DISPLAY_OPTIONS*)panel->GetDisplayOptions();

    if( displ_opts->m_ContrastModeDisplay )
    {
        if( !IsOnLayer( curr_layer ) )
            ColorTurnToDarkDarkGray( &color );
    }

    if( aDrawMode & GR_HIGHLIGHT )
        ColorChangeHighlightFlag( &color, !(aDrawMode & GR_AND) );

    ColorApplyHighlightFlag( &color );

    SetAlpha( &color, 150 );

    // draw the lines
    int i_start_contour = 0;
    std::vector<wxPoint> lines;
    lines.reserve( (GetNumCorners() * 2) + 2 );

    for( int ic = 0; ic < GetNumCorners(); ic++ )
    {
        seg_start = GetCornerPosition( ic ) + offset;

        if( !m_Poly->m_CornersList.IsEndContour( ic ) && ic < GetNumCorners() - 1 )
        {
            seg_end = GetCornerPosition( ic + 1 ) + offset;
        }
        else
        {
            seg_end = GetCornerPosition( i_start_contour ) + offset;
            i_start_contour = ic + 1;
        }

        lines.push_back( seg_start );
        lines.push_back( seg_end );
    }

    GRLineArray( panel->GetClipBox(), DC, lines, 0, color );

    // draw hatches
    lines.clear();
    lines.reserve( (m_Poly->m_HatchLines.size() * 2) + 2 );

    for( unsigned ic = 0; ic < m_Poly->m_HatchLines.size(); ic++ )
    {
        seg_start = m_Poly->m_HatchLines[ic].m_Start + offset;
        seg_end   = m_Poly->m_HatchLines[ic].m_End + offset;
        lines.push_back( seg_start );
        lines.push_back( seg_end );
    }

    GRLineArray( panel->GetClipBox(), DC, lines, 0, color );
}


void ZONE_CONTAINER::DrawFilledArea( EDA_DRAW_PANEL* panel,
                                     wxDC* DC, GR_DRAWMODE aDrawMode, const wxPoint& offset )
{
    static std::vector <char>    CornersTypeBuffer;
    static std::vector <wxPoint> CornersBuffer;
    DISPLAY_OPTIONS* displ_opts = (DISPLAY_OPTIONS*)panel->GetDisplayOptions();

    // outline_mode is false to show filled polys,
    // and true to show polygons outlines only (test and debug purposes)
    bool outline_mode = displ_opts->m_DisplayZonesMode == 2 ? true : false;

    if( DC == NULL )
        return;

    if( displ_opts->m_DisplayZonesMode == 1 )     // Do not show filled areas
        return;

    if( m_FilledPolysList.GetCornersCount() == 0 )  // Nothing to draw
        return;

    BOARD*      brd = GetBoard();
    LAYER_ID    curr_layer = ( (PCB_SCREEN*) panel->GetScreen() )->m_Active_Layer;
    EDA_COLOR_T color = brd->GetLayerColor( m_Layer );

    if( brd->IsLayerVisible( m_Layer ) == false && ( color & HIGHLIGHT_FLAG ) != HIGHLIGHT_FLAG )
        return;

    GRSetDrawMode( DC, aDrawMode );

    if( displ_opts->m_ContrastModeDisplay )
    {
        if( !IsOnLayer( curr_layer ) )
            ColorTurnToDarkDarkGray( &color );
    }

    if( aDrawMode & GR_HIGHLIGHT )
        ColorChangeHighlightFlag( &color, !(aDrawMode & GR_AND) );

    ColorApplyHighlightFlag( &color );

    SetAlpha( &color, 150 );

    CornersTypeBuffer.clear();
    CornersBuffer.clear();

    // Draw all filled areas
    int imax = m_FilledPolysList.GetCornersCount() - 1;

    for( int ic = 0; ic <= imax; ic++ )
    {
        const CPolyPt& corner = m_FilledPolysList.GetCorner( ic );
        wxPoint  coord( corner.x + offset.x, corner.y + offset.y );
        CornersBuffer.push_back( coord );
        CornersTypeBuffer.push_back( (char) corner.m_flags );

        // the last corner of a filled area is found: draw it
        if( (corner.end_contour) || (ic == imax) )
        {
            /* Draw the current filled area: draw segments outline first
             * Curiously, draw segments outline first and after draw filled polygons
             * with outlines thickness = 0 is a faster than
             * just draw filled polygons but with outlines thickness = m_ZoneMinThickness
             * So DO NOT use draw filled polygons with outlines having a thickness  > 0
             * Note: Extra segments ( added to joint holes with external outline) flagged by
             * m_flags != 0 are not drawn
             * Note not all polygon libraries provide a flag for these extra-segments, therefore
             * the m_flags member can be always 0
             */
            {
                // Draw outlines:
                if( (m_ZoneMinThickness > 1) || outline_mode )
                {
                    int ilim = CornersBuffer.size() - 1;

                    for(  int is = 0, ie = ilim; is <= ilim; ie = is, is++ )
                    {
                        int x0 = CornersBuffer[is].x;
                        int y0 = CornersBuffer[is].y;
                        int x1 = CornersBuffer[ie].x;
                        int y1 = CornersBuffer[ie].y;

                        // Draw only basic outlines, not extra segments.
                        if( CornersTypeBuffer[ie] == 0 )
                        {
                            if( !displ_opts->m_DisplayPcbTrackFill || GetState( FORCE_SKETCH ) )
                                GRCSegm( panel->GetClipBox(), DC,
                                         x0, y0, x1, y1,
                                         m_ZoneMinThickness, color );
                            else
                                GRFillCSegm( panel->GetClipBox(), DC,
                                             x0, y0, x1, y1,
                                             m_ZoneMinThickness, color );
                        }
                    }
                }

                // Draw areas:
                if( m_FillMode == 0 && !outline_mode )
                    GRPoly( panel->GetClipBox(), DC, CornersBuffer.size(), &CornersBuffer[0],
                            true, 0, color, color );
            }

            CornersTypeBuffer.clear();
            CornersBuffer.clear();
        }
    }

    if( m_FillMode == 1  && !outline_mode )     // filled with segments
    {
        for( unsigned ic = 0; ic < m_FillSegmList.size(); ic++ )
        {
            wxPoint start = m_FillSegmList[ic].m_Start + offset;
            wxPoint end   = m_FillSegmList[ic].m_End + offset;

            if( !displ_opts->m_DisplayPcbTrackFill || GetState( FORCE_SKETCH ) )
                GRCSegm( panel->GetClipBox(), DC, start.x, start.y, end.x, end.y,
                         m_ZoneMinThickness, color );
            else
                GRFillCSegm( panel->GetClipBox(), DC, start.x, start.y, end.x, end.y,
                             m_ZoneMinThickness, color );
        }
    }
}


const EDA_RECT ZONE_CONTAINER::GetBoundingBox() const
{
    const int PRELOAD = 0x7FFFFFFF;     // Biggest integer (32 bits)

    int       ymax = -PRELOAD;
    int       ymin = PRELOAD;
    int       xmin = PRELOAD;
    int       xmax = -PRELOAD;

    int       count = GetNumCorners();

    for( int i = 0; i<count; ++i )
    {
        wxPoint corner = GetCornerPosition( i );

        ymax = std::max( ymax, corner.y );
        xmax = std::max( xmax, corner.x );
        ymin = std::min( ymin, corner.y );
        xmin = std::min( xmin, corner.x );
    }

    EDA_RECT ret( wxPoint( xmin, ymin ), wxSize( xmax - xmin + 1, ymax - ymin + 1 ) );

    return ret;
}


void ZONE_CONTAINER::DrawWhileCreateOutline( EDA_DRAW_PANEL* panel, wxDC* DC,
                                             GR_DRAWMODE draw_mode )
{
    GR_DRAWMODE current_gr_mode  = draw_mode;
    bool    is_close_segment = false;
    wxPoint seg_start, seg_end;

    if( !DC )
        return;

    LAYER_ID    curr_layer = ( (PCB_SCREEN*) panel->GetScreen() )->m_Active_Layer;
    BOARD*      brd   = GetBoard();
    EDA_COLOR_T color = brd->GetLayerColor( m_Layer );
    DISPLAY_OPTIONS* displ_opts = (DISPLAY_OPTIONS*)panel->GetDisplayOptions();

    if( displ_opts->m_ContrastModeDisplay )
    {
        if( !IsOnLayer( curr_layer ) )
            ColorTurnToDarkDarkGray( &color );
    }

    // draw the lines
    wxPoint start_contour_pos = GetCornerPosition( 0 );
    int     icmax = GetNumCorners() - 1;

    for( int ic = 0; ic <= icmax; ic++ )
    {
        int xi = GetCornerPosition( ic ).x;
        int yi = GetCornerPosition( ic ).y;
        int xf, yf;

        if( !m_Poly->m_CornersList.IsEndContour( ic ) && ic < icmax )
        {
            is_close_segment = false;
            xf = GetCornerPosition( ic + 1 ).x;
            yf = GetCornerPosition( ic + 1 ).y;

            if( m_Poly->m_CornersList.IsEndContour( ic + 1 ) || (ic == icmax - 1) )
                current_gr_mode = GR_XOR;
            else
                current_gr_mode = draw_mode;
        }
        else    // Draw the line from last corner to the first corner of the current contour
        {
            is_close_segment = true;
            current_gr_mode  = GR_XOR;
            xf = start_contour_pos.x;
            yf = start_contour_pos.y;

            // Prepare the next contour for drawing, if exists
            if( ic < icmax )
                start_contour_pos = GetCornerPosition( ic + 1 );
        }

        GRSetDrawMode( DC, current_gr_mode );

        if( is_close_segment )
            GRLine( panel->GetClipBox(), DC, xi, yi, xf, yf, 0, WHITE );
        else
            GRLine( panel->GetClipBox(), DC, xi, yi, xf, yf, 0, color );
    }
}


int ZONE_CONTAINER::GetThermalReliefGap( D_PAD* aPad ) const
{
    if( aPad == NULL || aPad->GetThermalGap() == 0 )
        return m_ThermalReliefGap;
    else
        return aPad->GetThermalGap();
}


int ZONE_CONTAINER::GetThermalReliefCopperBridge( D_PAD* aPad ) const
{
    if( aPad == NULL || aPad->GetThermalWidth() == 0 )
        return m_ThermalReliefCopperBridge;
    else
        return aPad->GetThermalWidth();
}


bool ZONE_CONTAINER::HitTest( const wxPoint& aPosition ) const
{
    if( HitTestForCorner( aPosition ) >= 0 )
        return true;

    if( HitTestForEdge( aPosition ) >= 0 )
        return true;

    return false;
}

void ZONE_CONTAINER::SetSelectedCorner( const wxPoint& aPosition )
{
    m_CornerSelection = HitTestForCorner( aPosition );

    if( m_CornerSelection < 0 )
        m_CornerSelection = HitTestForEdge( aPosition );
}


// Zones outlines have no thickness, so it Hit Test functions
// we must have a default distance between the test point
// and a corner or a zone edge:
#define MAX_DIST_IN_MM 0.25

int ZONE_CONTAINER::HitTestForCorner( const wxPoint& refPos ) const
{
    int distmax = Millimeter2iu( MAX_DIST_IN_MM );
    return m_Poly->HitTestForCorner( refPos, distmax );
}


int ZONE_CONTAINER::HitTestForEdge( const wxPoint& refPos ) const
{
    int distmax = Millimeter2iu( MAX_DIST_IN_MM );
    return m_Poly->HitTestForEdge( refPos, distmax );
}


bool ZONE_CONTAINER::HitTest( const EDA_RECT& aRect, bool aContained, int aAccuracy ) const
{
    EDA_RECT arect = aRect;
    arect.Inflate( aAccuracy );
    EDA_RECT bbox = m_Poly->GetBoundingBox();
    bbox.Normalize();

    if( aContained )
         return arect.Contains( bbox );
    else    // Test for intersection between aRect and the polygon
            // For a polygon, using its bounding box has no sense here
    {
        // Fast test: if aRect is outside the polygon bounding box,
        // rectangles cannot intersect
        if( ! bbox.Intersects( arect ) )
            return false;

        // aRect is inside the polygon bounding box,
        // and can intersect the polygon: use a fine test.
        // aRect intersects the polygon if at least one aRect corner
        // is inside the polygon
        wxPoint corner = arect.GetOrigin();

        if( HitTestInsideZone( corner ) )
            return true;

        corner.x = arect.GetEnd().x;

        if( HitTestInsideZone( corner ) )
            return true;

        corner = arect.GetEnd();

        if( HitTestInsideZone( corner ) )
            return true;

        corner.x = arect.GetOrigin().x;

        if( HitTestInsideZone( corner ) )
            return true;

        // No corner inside arect, but outlines can intersect arect
        // if one of outline corners is inside arect
        int count = m_Poly->GetCornersCount();
        for( int ii =0; ii < count; ii++ )
        {
            if( arect.Contains( m_Poly->GetPos( ii ) ) )
                return true;
        }

        return false;
    }
}


int ZONE_CONTAINER::GetClearance( BOARD_CONNECTED_ITEM* aItem ) const
{
    int         myClearance = m_ZoneClearance;

#if 0   // Maybe the netclass clearance should not come into play for a zone?
        // At least the policy decision can be controlled by the zone
        // itself, i.e. here.  On reasons of insufficient documentation,
        // the user will be less bewildered if we simply respect the
        // "zone clearance" setting in the zone properties dialog.  (At least
        // until there is a UI boolean for this.)

    NETCLASSPTR   myClass  = GetNetClass();

    if( myClass )
        myClearance = std::max( myClearance, myClass->GetClearance() );
#endif

    if( aItem )
    {
        int hisClearance = aItem->GetClearance( NULL );
        myClearance = std::max( hisClearance, myClearance );
    }

    return myClearance;
}


bool ZONE_CONTAINER::HitTestFilledArea( const wxPoint& aRefPos ) const
{
    unsigned indexstart = 0, indexend;
    bool     inside     = false;

    for( indexend = 0; indexend < m_FilledPolysList.GetCornersCount(); indexend++ )
    {
        if( m_FilledPolysList.IsEndContour( indexend ) )       // end of a filled sub-area found
        {
            if( TestPointInsidePolygon( m_FilledPolysList, indexstart, indexend,
                                        aRefPos.x, aRefPos.y ) )
            {
                inside = true;
                break;
            }

            // Prepare test of next area which starts after the current index end (if exists)
            indexstart = indexend + 1;
        }
    }

    return inside;
}


void ZONE_CONTAINER::GetMsgPanelInfo( std::vector< MSG_PANEL_ITEM >& aList )
{
    wxString msg;

    msg = _( "Zone Outline" );

    // Display Cutout instead of Outline for holes inside a zone
    // i.e. when num contour !=0
    int ncont = m_Poly->GetContour( m_CornerSelection );

    if( ncont )
        msg << wxT( " " ) << _( "(Cutout)" );

    aList.push_back( MSG_PANEL_ITEM( _( "Type" ), msg, DARKCYAN ) );

    if( GetIsKeepout() )
    {
        msg.Empty();

        if( GetDoNotAllowVias() )
            AccumulateDescription( msg, _( "No via" ) );

        if( GetDoNotAllowTracks() )
            AccumulateDescription( msg, _("No track") );

        if( GetDoNotAllowCopperPour() )
            AccumulateDescription( msg, _("No copper pour") );

        aList.push_back( MSG_PANEL_ITEM( _( "Keepout" ), msg, RED ) );
    }
    else if( IsOnCopperLayer() )
    {
        if( GetNetCode() >= 0 )
        {
            NETINFO_ITEM* net = GetNet();

            if( net )
                msg = net->GetNetname();
            else    // Should not occur
                msg = _( "<unknown>" );
        }
        else    // a netcode < 0 is an error
            msg = wxT( "<error>" );

        aList.push_back( MSG_PANEL_ITEM( _( "NetName" ), msg, RED ) );

        // Display net code : (useful in test or debug)
        msg.Printf( wxT( "%d" ), GetNetCode() );
        aList.push_back( MSG_PANEL_ITEM( _( "NetCode" ), msg, RED ) );

        // Display priority level
        msg.Printf( wxT( "%d" ), GetPriority() );
        aList.push_back( MSG_PANEL_ITEM( _( "Priority" ), msg, BLUE ) );
    }
    else
    {
        aList.push_back( MSG_PANEL_ITEM( _( "Non Copper Zone" ), wxEmptyString, RED ) );
    }

    aList.push_back( MSG_PANEL_ITEM( _( "Layer" ), GetLayerName(), BROWN ) );

    msg.Printf( wxT( "%d" ), (int) m_Poly->m_CornersList.GetCornersCount() );
    aList.push_back( MSG_PANEL_ITEM( _( "Corners" ), msg, BLUE ) );

    if( m_FillMode )
        msg = _( "Segments" );
    else
        msg = _( "Polygons" );

    aList.push_back( MSG_PANEL_ITEM( _( "Fill Mode" ), msg, BROWN ) );

    // Useful for statistics :
    msg.Printf( wxT( "%d" ), (int) m_Poly->m_HatchLines.size() );
    aList.push_back( MSG_PANEL_ITEM( _( "Hatch Lines" ), msg, BLUE ) );

    if( m_FilledPolysList.GetCornersCount() )
    {
        msg.Printf( wxT( "%d" ), (int) m_FilledPolysList.GetCornersCount() );
        aList.push_back( MSG_PANEL_ITEM( _( "Corner Count" ), msg, BLUE ) );
    }
}


/* Geometric transforms: */

void ZONE_CONTAINER::Move( const wxPoint& offset )
{
    /* move outlines */
    for( unsigned ii = 0; ii < m_Poly->m_CornersList.GetCornersCount(); ii++ )
    {
        SetCornerPosition( ii, GetCornerPosition( ii ) + offset );
    }

    m_Poly->Hatch();

    /* move filled areas: */
    for( unsigned ic = 0; ic < m_FilledPolysList.GetCornersCount(); ic++ )
    {
        m_FilledPolysList.SetX( ic, m_FilledPolysList.GetX( ic ) + offset.x );
        m_FilledPolysList.SetY( ic, m_FilledPolysList.GetY( ic ) + offset.y );
    }

    for( unsigned ic = 0; ic < m_FillSegmList.size(); ic++ )
    {
        m_FillSegmList[ic].m_Start += offset;
        m_FillSegmList[ic].m_End   += offset;
    }
}


void ZONE_CONTAINER::MoveEdge( const wxPoint& offset, int aEdge )
{
    // Move the start point of the selected edge:
    SetCornerPosition( aEdge, GetCornerPosition( aEdge ) + offset );

    // Move the end point of the selected edge:
    if( m_Poly->m_CornersList.IsEndContour( aEdge ) || aEdge == GetNumCorners() - 1 )
    {
        int icont = m_Poly->GetContour( aEdge );
        aEdge = m_Poly->GetContourStart( icont );
    }
    else
    {
        aEdge++;
    }

    SetCornerPosition( aEdge, GetCornerPosition( aEdge ) + offset );

    m_Poly->Hatch();
}


void ZONE_CONTAINER::Rotate( const wxPoint& centre, double angle )
{
    wxPoint pos;

    for( unsigned ic = 0; ic < m_Poly->m_CornersList.GetCornersCount(); ic++ )
    {
        pos = m_Poly->m_CornersList.GetPos( ic );
        RotatePoint( &pos, centre, angle );
        m_Poly->SetX( ic, pos.x );
        m_Poly->SetY( ic, pos.y );
    }

    m_Poly->Hatch();

    /* rotate filled areas: */
    for( unsigned ic = 0; ic < m_FilledPolysList.GetCornersCount(); ic++ )
    {
        pos = m_FilledPolysList.GetPos( ic );
        RotatePoint( &pos, centre, angle );
        m_FilledPolysList.SetX( ic, pos.x );
        m_FilledPolysList.SetY( ic, pos.y );
    }

    for( unsigned ic = 0; ic < m_FillSegmList.size(); ic++ )
    {
        RotatePoint( &m_FillSegmList[ic].m_Start, centre, angle );
        RotatePoint( &m_FillSegmList[ic].m_End, centre, angle );
    }
}


void ZONE_CONTAINER::Flip( const wxPoint& aCentre )
{
    Mirror( aCentre );
    SetLayer( FlipLayer( GetLayer() ) );
}


void ZONE_CONTAINER::Mirror( const wxPoint& mirror_ref )
{
    for( unsigned ic = 0; ic < m_Poly->m_CornersList.GetCornersCount(); ic++ )
    {
        int py = m_Poly->m_CornersList.GetY( ic ) - mirror_ref.y;
        NEGATE( py );
        m_Poly->m_CornersList.SetY( ic, py + mirror_ref.y );
    }

    m_Poly->Hatch();

    /* mirror filled areas: */
    for( unsigned ic = 0; ic < m_FilledPolysList.GetCornersCount(); ic++ )
    {
        int py = m_FilledPolysList.GetY( ic ) - mirror_ref.y;
        NEGATE( py );
        m_FilledPolysList.SetY( ic, py + mirror_ref.y );
    }

    for( unsigned ic = 0; ic < m_FillSegmList.size(); ic++ )
    {
        m_FillSegmList[ic].m_Start.y -= mirror_ref.y;
        NEGATE( m_FillSegmList[ic].m_Start.y );
        m_FillSegmList[ic].m_Start.y += mirror_ref.y;
        m_FillSegmList[ic].m_End.y   -= mirror_ref.y;
        NEGATE( m_FillSegmList[ic].m_End.y );
        m_FillSegmList[ic].m_End.y += mirror_ref.y;
    }
}


void ZONE_CONTAINER::Copy( ZONE_CONTAINER* src )
{
    m_Parent = src->m_Parent;
    m_Layer  = src->m_Layer;
    SetNetCode( src->GetNetCode() );
    SetTimeStamp( src->m_TimeStamp );
    m_Poly->RemoveAllContours();
    m_Poly->Copy( src->m_Poly );                // copy outlines
    m_CornerSelection  = -1;                    // For corner moving, corner index to drag,
                                                // or -1 if no selection
    m_ZoneClearance    = src->m_ZoneClearance;  // clearance value
    m_ZoneMinThickness = src->m_ZoneMinThickness;
    m_FillMode = src->m_FillMode;               // Filling mode (segments/polygons)
    m_ArcToSegmentsCount = src->m_ArcToSegmentsCount;
    m_PadConnection = src->m_PadConnection;
    m_ThermalReliefGap = src->m_ThermalReliefGap;
    m_ThermalReliefCopperBridge = src->m_ThermalReliefCopperBridge;
    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.RemoveAllContours();
    m_FilledPolysList.Append( src->m_FilledPolysList );
    m_FillSegmList.clear();
    m_FillSegmList = src->m_FillSegmList;
}


ZoneConnection ZONE_CONTAINER::GetPadConnection( D_PAD* aPad ) const
{
    if( aPad == NULL || aPad->GetZoneConnection() == UNDEFINED_CONNECTION )
        return m_PadConnection;
    else
        return aPad->GetZoneConnection();
}


void ZONE_CONTAINER::AddPolygon( std::vector< wxPoint >& aPolygon )
{
    if( aPolygon.empty() )
        return;

    for( unsigned i = 0;  i < aPolygon.size();  i++ )
    {
        if( i == 0 )
            m_Poly->Start( GetLayer(), aPolygon[i].x, aPolygon[i].y, GetHatchStyle() );
        else
            AppendCorner( aPolygon[i] );
    }

    m_Poly->CloseLastContour();
}



wxString ZONE_CONTAINER::GetSelectMenuText() const
{
    wxString text;
    NETINFO_ITEM* net;
    BOARD* board = GetBoard();

    int ncont = m_Poly->GetContour( m_CornerSelection );

    if( ncont )
        text << wxT( " " ) << _( "(Cutout)" );

    if( GetIsKeepout() )
        text << wxT( " " ) << _( "(Keepout)" );

    text << wxString::Format( wxT( " (%08lX)" ), m_TimeStamp );

    // Display net name for copper zones
    if( !GetIsKeepout() )
    {
        if( GetNetCode() >= 0 )
        {
            if( board )
            {
                net = GetNet();

                if( net )
                {
                    text << wxT( " [" ) << net->GetNetname() << wxT( "]" );
                }
            }
            else
            {
                text << _( "** NO BOARD DEFINED **" );
            }
        }
        else
        {   // A netcode < 0 is an error:
            // Netname not found or area not initialised
            text << wxT( " [" ) << GetNetname() << wxT( "]" );
            text << wxT( " <" ) << _( "Not Found" ) << wxT( ">" );
        }
    }

    wxString msg;
    msg.Printf( _( "Zone Outline %s on %s" ), GetChars( text ),
                 GetChars( GetLayerName() ) );

    return msg;
}


/* Copy polygons stored in aKiPolyList to m_FilledPolysList
 * The previous m_FilledPolysList contents is replaced.
 */
void ZONE_CONTAINER::CopyPolygonsFromClipperPathsToFilledPolysList(
                            ClipperLib::Paths& aClipperPolyList )
{
    m_FilledPolysList.RemoveAllContours();
    m_FilledPolysList.ImportFrom( aClipperPolyList );
}