export_idf.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2013  Cirilo Bernardo
 * Copyright The 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, see <https://www.gnu.org/licenses/>.
 */
 
 
#include <list>
#include <optional>
#include <locale_io.h>
#include <macros.h>
#include <pcb_edit_frame.h>
#include <board.h>
#include <board_design_settings.h>
#include <footprint.h>
#include <footprint_library_adapter.h>
#include <io/idf/idf_parser.h>
#include <pad.h>
#include <pcb_shape.h>
#include <build_version.h>
#include <project_pcb.h>
#include <reporter.h>
#include "project.h"
#include "3d_cache/3d_cache.h"
#include "filename_resolver.h"
#include "export_idf.h"
 
 
#include <3d_math.h>
#include <3d_rendering/3d_placeholder_utils.h>
#include <base_units.h>     // to define pcbIUScale.FromMillimeter(x)
#include <jobs/job_export_pcb_idf.h>
 
 
// assumed default graphical line thickness: == 0.1mm
#define LINE_WIDTH (pcbIUScale.mmToIU( 0.1 ))
 
 
IDF_EXPORTER::IDF_EXPORTER( BOARD* aBoard, FILENAME_RESOLVER* aResolver, JOB_EXPORT_PCB_IDF* aSettings,
                            REPORTER* aReporter ) :
        m_board( aBoard ),
        m_resolver( aResolver ),
        m_settings( aSettings ),
        m_reporter( aReporter )
{
    if( !m_settings )
    {
        m_defaultSettings = std::make_unique<JOB_EXPORT_PCB_IDF>();
        m_settings = m_defaultSettings.get();
    }
}

static void idf_append_shape( PCB_SHAPE* aGraphic, double aScale, double aOffX, double aOffY,
                              std::list<IDF_SEGMENT*>& aLines )
{
    IDF_POINT sp, ep;                   // start and end points from KiCad item
 
    switch( aGraphic->GetShape() )
    {
    case SHAPE_T::SEGMENT:
    {
        if( aGraphic->GetStart() == aGraphic->GetEnd() )
            break;
 
        sp.x = aGraphic->GetStart().x * aScale + aOffX;
        sp.y = -aGraphic->GetStart().y * aScale + aOffY;
        ep.x = aGraphic->GetEnd().x * aScale + aOffX;
        ep.y = -aGraphic->GetEnd().y * aScale + aOffY;
        aLines.push_back( new IDF_SEGMENT( sp, ep ) );
 
        break;
    }
 
    case SHAPE_T::RECTANGLE:
    {
        if( aGraphic->GetStart() == aGraphic->GetEnd() )
            break;
 
        // IDF Y is up-positive, so mirror KiCad's down-positive Y like the other shapes do
        double top = -aGraphic->GetStart().y * aScale + aOffY;
        double left = aGraphic->GetStart().x * aScale + aOffX;
        double bottom = -aGraphic->GetEnd().y * aScale + aOffY;
        double right = aGraphic->GetEnd().x * aScale + aOffX;
 
        IDF_POINT corners[4];
        corners[0] = IDF_POINT( left, top );
        corners[1] = IDF_POINT( right, top );
        corners[2] = IDF_POINT( right, bottom );
        corners[3] = IDF_POINT( left, bottom );
 
        aLines.push_back( new IDF_SEGMENT( corners[0], corners[1] ) );
        aLines.push_back( new IDF_SEGMENT( corners[1], corners[2] ) );
        aLines.push_back( new IDF_SEGMENT( corners[2], corners[3] ) );
        aLines.push_back( new IDF_SEGMENT( corners[3], corners[0] ) );
        break;
    }
 
    case SHAPE_T::ARC:
    {
        if( aGraphic->GetCenter() == aGraphic->GetStart() )
            break;
 
        sp.x = aGraphic->GetCenter().x * aScale + aOffX;
        sp.y = -aGraphic->GetCenter().y * aScale + aOffY;
        ep.x = aGraphic->GetStart().x * aScale + aOffX;
        ep.y = -aGraphic->GetStart().y * aScale + aOffY;
        aLines.push_back( new IDF_SEGMENT( sp, ep, -aGraphic->GetArcAngle().AsDegrees(), true ) );
 
        break;
    }
 
    case SHAPE_T::CIRCLE:
    {
        if( aGraphic->GetRadius() == 0 )
            break;
 
        sp.x = aGraphic->GetCenter().x * aScale + aOffX;
        sp.y = -aGraphic->GetCenter().y * aScale + aOffY;
        ep.x = sp.x - aGraphic->GetRadius() * aScale;
        ep.y = sp.y;
 
        // Circles must always have an angle of +360 deg. to appease
        // quirky MCAD implementations of IDF.
        aLines.push_back( new IDF_SEGMENT( sp, ep, 360.0, true ) );
 
        break;
    }
 
    case SHAPE_T::POLY:
    {
        if( !aGraphic->IsPolyShapeValid() )
            break;
 
        // Holes within an outline have no IDF representation; each outline is its own loop
        const SHAPE_POLY_SET& polySet = aGraphic->GetPolyShape();
 
        for( int ii = 0; ii < polySet.OutlineCount(); ++ii )
        {
            const SHAPE_LINE_CHAIN& chain = polySet.COutline( ii );
 
            for( int jj = 0; jj < chain.PointCount(); ++jj )
            {
                const VECTOR2I& start = chain.CPoint( jj );
                const VECTOR2I& end = chain.CPoint( ( jj + 1 ) % chain.PointCount() );
 
                if( start == end )
                    continue;
 
                sp.x = start.x * aScale + aOffX;
                sp.y = -start.y * aScale + aOffY;
                ep.x = end.x * aScale + aOffX;
                ep.y = -end.y * aScale + aOffY;
                aLines.push_back( new IDF_SEGMENT( sp, ep ) );
            }
        }
 
        break;
    }
 
    case SHAPE_T::BEZIER:
    {
        aGraphic->RebuildBezierToSegmentsPointsList();
 
        const std::vector<VECTOR2I>& pts = aGraphic->GetBezierPoints();
 
        for( size_t ii = 1; ii < pts.size(); ++ii )
        {
            if( pts[ii - 1] == pts[ii] )
                continue;
 
            sp.x = pts[ii - 1].x * aScale + aOffX;
            sp.y = -pts[ii - 1].y * aScale + aOffY;
            ep.x = pts[ii].x * aScale + aOffX;
            ep.y = -pts[ii].y * aScale + aOffY;
            aLines.push_back( new IDF_SEGMENT( sp, ep ) );
        }
 
        break;
    }
 
    default:
        break;
    }
}
 

static void idf_export_outline( BOARD* aPcb, IDF3_BOARD& aIDFBoard )
{
    double scale = aIDFBoard.GetUserScale();
    std::list< IDF_SEGMENT* > lines;    // IDF intermediate form of KiCad graphical item
    IDF_OUTLINE* outline = nullptr;     // graphical items forming an outline or cutout
 
    // Footprint cutouts are emitted separately by idf_export_footprint(); like board cutouts they
    // belong in the board outline section rather than the Other Outline section.
 
    double offX, offY;
    aIDFBoard.GetUserOffset( offX, offY );
 
    // Retrieve segments and arcs from the board
    for( BOARD_ITEM* item : aPcb->Drawings() )
    {
        if( item->Type() != PCB_SHAPE_T || item->GetLayer() != Edge_Cuts )
            continue;
 
        idf_append_shape( static_cast<PCB_SHAPE*>( item ), scale, offX, offY, lines );
    }
 
    // if there is no outline then use the bounding box
    if( lines.empty() )
    {
        goto UseBoundingBox;
    }
 
    // get the board outline and write it out
    // note: we do not use a try/catch block here since we intend
    // to simply ignore unclosed loops and continue processing
    // until we're out of segments to process
    outline = new IDF_OUTLINE;
    IDF3::GetOutline( lines, *outline );
 
    if( outline->empty() )
        goto UseBoundingBox;
 
    aIDFBoard.AddBoardOutline( outline );
    outline = nullptr;
 
    // get all cutouts and write them out
    while( !lines.empty() )
    {
        if( !outline )
            outline = new IDF_OUTLINE;
 
        IDF3::GetOutline( lines, *outline );
 
        if( outline->empty() )
        {
            outline->Clear();
            continue;
        }
 
        aIDFBoard.AddBoardOutline( outline );
        outline = nullptr;
    }
 
    // an open loop on the final iteration leaves an allocated but empty outline behind
    delete outline;
 
    return;
 
UseBoundingBox:
 
    // clean up if necessary
    while( !lines.empty() )
    {
        delete lines.front();
        lines.pop_front();
    }
 
    if( outline )
        outline->Clear();
    else
        outline = new IDF_OUTLINE;
 
    // Fetch a rectangular bounding box for the board; there is always some uncertainty in the
    // board dimensions computed via ComputeBoundingBox() since this depends on the individual
    // footprint entities.
    BOX2I bbbox = aPcb->GetBoardEdgesBoundingBox();
 
    // convert to mm and compensate for an assumed LINE_WIDTH line thickness
    double  x   = ( bbbox.GetOrigin().x + LINE_WIDTH / 2 ) * scale + offX;
    double  y   = ( bbbox.GetOrigin().y + LINE_WIDTH / 2 ) * scale + offY;
    double  dx  = ( bbbox.GetSize().x - LINE_WIDTH ) * scale;
    double  dy  = ( bbbox.GetSize().y - LINE_WIDTH ) * scale;
 
    double px[4], py[4];
    px[0]   = x;
    py[0]   = y;
 
    px[1]   = x;
    py[1]   = y + dy;
 
    px[2]   = x + dx;
    py[2]   = y + dy;
 
    px[3]   = x + dx;
    py[3]   = y;
 
    IDF_POINT p1, p2;
 
    p1.x    = px[3];
    p1.y    = py[3];
    p2.x    = px[0];
    p2.y    = py[0];
 
    outline->push( new IDF_SEGMENT( p1, p2 ) );
 
    for( int i = 1; i < 4; ++i )
    {
        p1.x    = px[i - 1];
        p1.y    = py[i - 1];
        p2.x    = px[i];
        p2.y    = py[i];
 
        outline->push( new IDF_SEGMENT( p1, p2 ) );
    }
 
    aIDFBoard.AddBoardOutline( outline );
}
 

static std::optional<double> getModelHeight( const S3DMODEL& aModel, const VECTOR3D& aRotation, const VECTOR3D& aScale )
{
    if( !aModel.m_Meshes )
        return std::nullopt;
 
    const glm::mat4 modelMatrix = CalcModelMatrix( SFVEC3F( 0.0f, 0.0f, 0.0f ),
                                                   SFVEC3F( aRotation.x, aRotation.y, aRotation.z ),
                                                   SFVEC3F( aScale.x, aScale.y, aScale.z ) );
    const SFVEC3F zRow( modelMatrix[0].z, modelMatrix[1].z, modelMatrix[2].z );
 
    float ret = 0.0;
 
    for( unsigned int meshIdx = 0; meshIdx < aModel.m_MeshesSize; ++meshIdx )
    {
        const SMESH& mesh = aModel.m_Meshes[meshIdx];
 
        if( !mesh.m_Positions )
            continue;
 
        for( unsigned int vtx = 0; vtx < mesh.m_VertexSize; ++vtx )
        {
            const SFVEC3F& pos = mesh.m_Positions[vtx];
            ret = std::max( ret, glm::dot( zRow, pos ) );
        }
    }
 
    return ret;
}
 
 
bool IDF_EXPORTER::exportFootprintIdfModels( FOOTPRINT* aFootprint, IDF3_BOARD& aIDFBoard ) const
{
    wxString libraryName = aFootprint->GetFPID().GetLibNickname();
    wxString footprintBasePath = wxEmptyString;
 
    if( m_board->GetProject() )
    {
        std::optional<LIBRARY_TABLE_ROW*> fpRow =
                            PROJECT_PCB::FootprintLibAdapter( m_board->GetProject() )->GetRow( libraryName );
 
        if( fpRow )
            footprintBasePath = LIBRARY_MANAGER::GetFullURI( *fpRow, true );
    }
 
    double scale = aIDFBoard.GetUserScale();
    double dx, dy;
    aIDFBoard.GetUserOffset( dx, dy );
 
    std::string refdes;
    IDF3_COMPONENT* comp = nullptr;
 
    auto sM = aFootprint->Models().begin();
    auto eM = aFootprint->Models().end();
    wxFileName idfFile;
    wxString   idfExt;
 
    while( sM != eM )
    {
        if( !sM->m_Show )
        {
            ++sM;
            continue;
        }
 
        std::vector<const EMBEDDED_FILES*> embeddedFilesStack;
        embeddedFilesStack.push_back( aFootprint->GetEmbeddedFiles() );
        embeddedFilesStack.push_back( m_board->GetEmbeddedFiles() );
 
        idfFile.Assign( m_resolver->ResolvePath( sM->m_Filename, footprintBasePath, std::move( embeddedFilesStack ) ) );
        idfExt = idfFile.GetExt();
 
        if( idfExt.Cmp( wxT( "idf" ) ) && idfExt.Cmp( wxT( "IDF" ) ) )
        {
            ++sM;
            continue;
        }
 
        if( refdes.empty() )
        {
            refdes = TO_UTF8( aFootprint->Reference().GetShownText( RESOLVED ) );
 
            // NOREFDES cannot be used or else the software gets confused
            // when writing out the placement data due to conflicting
            // placement and layer specifications; to work around this we
            // create a (hopefully) unique refdes for our exported part.
            if( refdes.empty() || !refdes.compare( "~" ) )
                refdes = aIDFBoard.GetNewRefDes();
        }
 
        IDF3_COMP_OUTLINE* outline = aIDFBoard.GetComponentOutline( idfFile.GetFullPath() );
 
        if( !outline )
        {
            if( m_reporter )
            {
                m_reporter->Report( wxString::Format( "Error exporting footprint %s model %s",
                                                      aFootprint->GetReference(), idfFile.GetFullPath() ),
                                    RPT_SEVERITY_ERROR );
            }
 
            return false;
        }
 
        double rotz = aFootprint->GetOrientation().AsDegrees();
        double locx = sM->m_Offset.x;  // part offsets are in mm
        double locy = sM->m_Offset.y;
        double locz = sM->m_Offset.z;
        double lrot = sM->m_Rotation.z;
 
        bool top = ( aFootprint->GetLayer() == B_Cu ) ? false : true;
 
        if( top )
        {
            locy = -locy;
            RotatePoint( &locx, &locy, aFootprint->GetOrientation() );
            locy = -locy;
        }
 
        if( !top )
        {
            lrot = -lrot;
            RotatePoint( &locx, &locy, aFootprint->GetOrientation() );
            locy = -locy;
 
            rotz = 180.0 - rotz;
 
            if( rotz >= 360.0 )
                while( rotz >= 360.0 ) rotz -= 360.0;
 
            if( rotz <= -360.0 )
                while( rotz <= -360.0 ) rotz += 360.0;
        }
 
        if( comp == nullptr )
            comp = aIDFBoard.FindComponent( refdes );
 
        if( comp == nullptr )
        {
            comp = new IDF3_COMPONENT( &aIDFBoard );
 
            comp->SetRefDes( refdes );
 
            if( top )
            {
                comp->SetPosition( aFootprint->GetPosition().x * scale + dx,
                                   -aFootprint->GetPosition().y * scale + dy,
                                   rotz, IDF3::IDF_LAYER::LYR_TOP );
            }
            else
            {
                comp->SetPosition( aFootprint->GetPosition().x * scale + dx,
                                   -aFootprint->GetPosition().y * scale + dy,
                                   rotz, IDF3::IDF_LAYER::LYR_BOTTOM );
            }
 
            comp->SetPlacement( IDF3::IDF_PLACEMENT::PS_ECAD );
 
            aIDFBoard.AddComponent( comp );
        }
        else
        {
            double refX, refY, refA;
            IDF3::IDF_LAYER side;
 
            if( ! comp->GetPosition( refX, refY, refA, side ) )
            {
                // place the item
                if( top )
                {
                    comp->SetPosition( aFootprint->GetPosition().x * scale + dx,
                                       -aFootprint->GetPosition().y * scale + dy,
                                       rotz, IDF3::IDF_LAYER::LYR_TOP );
                }
                else
                {
                    comp->SetPosition( aFootprint->GetPosition().x * scale + dx,
                                       -aFootprint->GetPosition().y * scale + dy,
                                       rotz, IDF3::IDF_LAYER::LYR_BOTTOM );
                }
 
                comp->SetPlacement( IDF3::IDF_PLACEMENT::PS_ECAD );
 
            }
            else
            {
                // check that the retrieved component matches this one
                refX = refX - ( aFootprint->GetPosition().x * scale + dx );
                refY = refY - ( -aFootprint->GetPosition().y * scale + dy );
                refA = refA - rotz;
                refA *= refA;
                refX *= refX;
                refY *= refY;
                refX += refY;
 
                // conditions: same side, X,Y coordinates within 10 microns,
                // angle within 0.01 degree
                if( ( top && side == IDF3::IDF_LAYER::LYR_BOTTOM ) || ( !top && side == IDF3::IDF_LAYER::LYR_TOP )
                    || ( refA > 0.0001 ) || ( refX > 0.0001 ) )
                {
                    if( m_reporter )
                    {
                        m_reporter->Report(
                                wxString::Format( "Error exporting footprint %s: duplicate reference designator",
                                                  aFootprint->GetReference() ),
                                RPT_SEVERITY_ERROR );
                    }
 
                    return false;
                }
            }
        }
 
        // create the local data ...
        IDF3_COMP_OUTLINE_DATA* data = new IDF3_COMP_OUTLINE_DATA( comp, outline );
 
        data->SetOffsets( locx, locy, locz, lrot );
        comp->AddOutlineData( data );
        ++sM;
    }
 
    if( comp && m_reporter )
    {
        m_reporter->Report( wxString::Format( _( "Exported IDF model for footprint %s" ), aFootprint->GetReference() ),
                            RPT_SEVERITY_INFO );
    }
 
    return comp != nullptr;
}
 
 
IDF3_COMP_OUTLINE* IDF_EXPORTER::createOutlineFromExtrudedBody( const FOOTPRINT* aFootprint, IDF3_BOARD& aIDFBoard,
                                                                const EXTRUDED_3D_BODY& aBody ) const
{
    SHAPE_POLY_SET outline;
 
    if( !GetExtrusionOutline( aFootprint, outline ) || outline.OutlineCount() < 1 )
    {
        if( m_reporter )
        {
            m_reporter->Report( wxString::Format( _( "Could not generate extruded body for %s" ),
                                                  aFootprint->GetReference() ),
                                RPT_SEVERITY_ERROR );
        }
 
        return nullptr;
    }
 
    ApplyExtrusionTransform( outline, &aBody, VECTOR2D() );
    outline.Move( -aFootprint->GetPosition() );
    outline.Rotate( -aFootprint->GetOrientation() );
    outline.Simplify();
 
    double scale = m_settings->m_units == IDF_SETTINGS::UNITS::MILS ? pcbIUScale.MILS_PER_IU : pcbIUScale.MM_PER_IU;
 
    SHAPE_LINE_CHAIN chain = outline.COutline( 0 );
 
    if( chain.PointCount() < 3 )
    {
        if( m_reporter )
        {
            m_reporter->Report( wxString::Format( _( "Could not generate extruded body for %s" ),
                                                  aFootprint->GetReference() ),
                                RPT_SEVERITY_ERROR );
        }
 
        return nullptr;
    }
 
    // Specify counter-clockwise: maybe not necessary for component outlines per the spec, but seems safe?
    chain = chain.Reverse();
 
    std::list<IDF_SEGMENT*> lines;
 
    for( int ii = 0; ii < chain.PointCount(); ++ii )
    {
        VECTOR2I start = chain.CPoint( ii );
        VECTOR2I end = chain.CPoint( ( ii + 1 ) % chain.PointCount() );
 
        if( start == end )
            continue;
 
        IDF_POINT sp( start.x * scale, -start.y * scale );
        IDF_POINT ep( end.x * scale, -end.y * scale );
 
        lines.push_back( new IDF_SEGMENT( sp, ep ) );
    }
 
    auto cleanup =
        [&lines]()
        {
            while( !lines.empty() )
            {
                delete lines.front();
                lines.pop_front();
            }
        };
 
    const PCB_FIELD* field = aFootprint->GetField( m_settings->m_partNumberField );
 
    if( !field )
        field = &aFootprint->Value();
 
    IDF3_COMP_OUTLINE* libOutline = aIDFBoard.GetComponentOutline( aFootprint->GetFPID().Format(),
                                                                   std::string( field->GetShownText( RESOLVED ) ) );
 
    if( !libOutline )
    {
        if( m_reporter )
        {
            m_reporter->Report( wxString::Format( _( "Could not generate extruded body for %s" ),
                                                  aFootprint->GetReference() ),
                                RPT_SEVERITY_ERROR );
        }
 
        cleanup();
        return nullptr;
    }
 
    if( libOutline->OutlinesSize() == 0 )
    {
        IDF_OUTLINE* idfOutline = new IDF_OUTLINE;
        IDF3::GetOutline( lines, *idfOutline );
 
        if( idfOutline->empty() )
        {
            delete idfOutline;
            cleanup();
            return nullptr;
        }
 
        IDF3::COMP_TYPE compType =
                ( aFootprint->GetAttributes() & FP_THROUGH_HOLE || aFootprint->GetAttributes() & FP_SMD )
                        ? IDF3::COMP_TYPE::COMP_ELEC
                        : IDF3::COMP_TYPE::COMP_MECH;
 
        libOutline->SetComponentClass( compType );
        libOutline->SetUnit( m_settings->m_units == IDF_SETTINGS::UNITS::MILS ? IDF3::IDF_UNIT::UNIT_THOU
                                                                              : IDF3::IDF_UNIT::UNIT_MM );
 
        double height = std::max( 0.0, aBody.m_height * aBody.m_scale.z * scale );
 
        libOutline->SetThickness( height );
 
        if( !libOutline->AddOutline( idfOutline ) )
        {
            delete idfOutline;
 
            if( m_reporter )
            {
                m_reporter->Report( wxString::Format( _( "Could not generate extruded body for %s" ),
                                                      aFootprint->GetReference() ),
                                    RPT_SEVERITY_ERROR );
            }
 
            cleanup();
            return nullptr;
        }
    }
    else
    {
        // The outline is shared with another footprint; reuse its geometry
    }
 
    return libOutline;
}
 
 
int IDF_EXPORTER::getMaxModelHeight( FOOTPRINT* aFootprint ) const
{
    PROJECT* project = m_board->GetProject();
    S3D_CACHE* cache = project ? PROJECT_PCB::Get3DCacheManager( project ) : nullptr;
    wxString libraryName = aFootprint->GetFPID().GetLibNickname();
    wxString footprintBasePath = wxEmptyString;
 
    if( !cache || !project )
        return 0;
 
    if( std::optional<LIBRARY_TABLE_ROW*> r = PROJECT_PCB::FootprintLibAdapter( project )->GetRow( libraryName ); r )
        footprintBasePath = LIBRARY_MANAGER::GetFullURI( *r, true );
 
    int height = 0;
 
    for( const FP_3DMODEL& fpModel : aFootprint->Models() )
    {
        if( !fpModel.m_Show || fpModel.m_Filename.empty() )
            continue;
 
        std::vector<const EMBEDDED_FILES*> embeddedFilesStack;
        embeddedFilesStack.push_back( aFootprint->GetEmbeddedFiles() );
        embeddedFilesStack.push_back( m_board->GetEmbeddedFiles() );
 
        wxString modelPath = m_resolver->ResolvePath( fpModel.m_Filename, footprintBasePath,
                                                    std::move( embeddedFilesStack ) );
 
        if( modelPath.empty() )
            continue;
 
        const S3DMODEL* model = cache->GetModel( modelPath, footprintBasePath, {} );
 
        if( !model )
            continue;
 
        height = std::max( height, pcbIUScale.mmToIU( getModelHeight( *model, fpModel.m_Rotation,
                                                                      fpModel.m_Scale ).value_or( 0 ) ) );
    }
 
    return height;
}
 

void IDF_EXPORTER::exportFootprint( FOOTPRINT* aFootprint, IDF3_BOARD& aIDFBoard ) const
{
    wxCHECK( m_board && m_resolver && m_settings, /* void */ );
 
    // Reference Designator
    std::string crefdes = TO_UTF8( aFootprint->Reference().GetShownText( RESOLVED ) );
 
    if( crefdes.empty() || !crefdes.compare( "~" ) )
    {
        std::string cvalue = TO_UTF8( aFootprint->Value().GetShownText( RESOLVED ) );
 
        // if both the RefDes and Value are empty or set to '~' the board owns the part,
        // otherwise associated parts of the footprint must be marked NOREFDES.
        if( cvalue.empty() || !cvalue.compare( "~" ) )
            crefdes = "BOARD";
        else
            crefdes = "NOREFDES";
    }
 
    // Export pads
    double  drill, x, y;
    double  scale = aIDFBoard.GetUserScale();
    IDF3::KEY_PLATING kplate;
    std::string pintype;
    std::string tstr;
 
    double dx, dy;
 
    aIDFBoard.GetUserOffset( dx, dy );
 
    // Footprint Edge_Cuts graphics are board cutouts. IDF has no per-component cutout, so they are
    // appended to the board outline section where any loop after the first is treated as a cutout.
    std::list<IDF_SEGMENT*> cutoutLines;
 
    for( BOARD_ITEM* item : aFootprint->GraphicalItems() )
    {
        if( item->Type() != PCB_SHAPE_T || item->GetLayer() != Edge_Cuts )
            continue;
 
        idf_append_shape( static_cast<PCB_SHAPE*>( item ), scale, dx, dy, cutoutLines );
    }
 
    // GetOutline() consumes at least one segment per call, so this terminates even on open loops.
    while( !cutoutLines.empty() )
    {
        IDF_OUTLINE* cutout = new IDF_OUTLINE;
        IDF3::GetOutline( cutoutLines, *cutout );
 
        if( cutout->empty() )
        {
            delete cutout;
            continue;
        }
 
        // ownership transfers only on success
        if( !aIDFBoard.AddBoardOutline( cutout ) )
            delete cutout;
    }
 
    for( auto pad : aFootprint->Pads() )
    {
        drill = (double) pad->GetDrillSize().x * scale;
        x     = pad->GetPosition().x * scale + dx;
        y     = -pad->GetPosition().y * scale + dy;
 
        // Export the hole on the edge layer
        if( drill > 0.0 )
        {
            // plating
            if( pad->GetAttribute() == PAD_ATTRIB::NPTH )
                kplate = IDF3::KEY_PLATING::NPTH;
            else
                kplate = IDF3::KEY_PLATING::PTH;
 
            // hole type
            tstr = TO_UTF8( pad->GetNumber() );
 
            if( tstr.empty() || !tstr.compare( "0" ) || !tstr.compare( "~" )
                || ( kplate == IDF3::KEY_PLATING::NPTH )
                || ( pad->GetDrillShape() == PAD_DRILL_SHAPE::OBLONG ) )
                pintype = "MTG";
            else
                pintype = "PIN";
 
            // fields:
            // 1. hole dia. : float
            // 2. X coord : float
            // 3. Y coord : float
            // 4. plating : PTH | NPTH
            // 5. Assoc. part : BOARD | NOREFDES | PANEL | {"refdes"}
            // 6. type : PIN | VIA | MTG | TOOL | { "other" }
            // 7. owner : MCAD | ECAD | UNOWNED
            if( ( pad->GetDrillShape() == PAD_DRILL_SHAPE::OBLONG )
                && ( pad->GetDrillSize().x != pad->GetDrillSize().y ) )
            {
                // NOTE: IDF does not have direct support for slots;
                // slots are implemented as a board cutout and we
                // cannot represent plating or reference designators
 
                double dlength = pad->GetDrillSize().y * scale;
 
                // NOTE: The orientation of footprints and pads have
                // the opposite sense due to KiCad drawing on a
                // screen with a LH coordinate system
                double angle = pad->GetOrientation().AsDegrees();
 
                // NOTE: Since this code assumes the scenario where
                // GetDrillSize().y is the length but idf_parser.cpp
                // assumes a length along the X axis, the orientation
                // must be shifted +90 deg when GetDrillSize().y is
                // the major axis.
 
                if( dlength < drill )
                {
                    std::swap( drill, dlength );
                }
                else
                {
                    angle += 90.0;
                }
 
                // NOTE: KiCad measures a slot's length from end to end
                // rather than between the centers of the arcs
                dlength -= drill;
 
                aIDFBoard.AddSlot( drill, dlength, angle, x, y );
            }
            else
            {
                IDF_DRILL_DATA *dp = new IDF_DRILL_DATA( drill, x, y, kplate, crefdes,
                                                         pintype, IDF3::KEY_OWNER::ECAD );
 
                if( !aIDFBoard.AddDrill( dp ) )
                {
                    delete dp;
 
                    if( m_reporter )
                    {
                        m_reporter->Report( wxString::Format( "Error exporting footprint %s: %s",
                                                              aFootprint->GetReference(),
                                                              _( "could not add drill for pad" ) ),
                                            RPT_SEVERITY_ERROR );
                    }
                }
            }
        }
    }
 
    if( ( !(aFootprint->GetAttributes() & (FP_THROUGH_HOLE|FP_SMD)) ) && !m_settings->m_includeUnspecified )
        return;
 
    if( aFootprint->GetDNPForVariant( m_board->GetCurrentVariant() ) && !m_settings->m_includeDNP )
        return;
 
    int standoffHeight = 0;
 
    // add any valid models to the library item list
    if( !exportFootprintIdfModels( aFootprint, aIDFBoard ) )
    {
        // No explicit models found: use the existing extruded body, or generate one
        IDF3_COMP_OUTLINE* libOutline = nullptr;
        EXTRUDED_3D_BODY generatedBody;
        EXTRUDED_3D_BODY* body = nullptr;
 
        if( EXTRUDED_3D_BODY* extruded = aFootprint->GetExtrudedBody() )
        {
            if( extruded->m_height <= 0 )
                return;
 
            standoffHeight = extruded->m_standoff;
            body = extruded;
        }
 
        if( !body )
        {
            int height = getMaxModelHeight( aFootprint );
 
            if( height == 0 )
                return;
 
            generatedBody.m_height = height;
            body = &generatedBody;
        }
 
        libOutline = createOutlineFromExtrudedBody( aFootprint, aIDFBoard, *body );
 
        if( libOutline )
        {
            std::string refdes = TO_UTF8( aFootprint->Reference().GetShownText( RESOLVED ) );
 
            if( refdes.empty() || !refdes.compare( "~" ) )
                refdes = aIDFBoard.GetNewRefDes();
 
            IDF3_COMPONENT* comp = aIDFBoard.FindComponent( refdes );
            double          rotz = aFootprint->GetOrientation().AsDegrees();
            bool            top = ( aFootprint->GetLayer() != B_Cu );
 
            if( comp == nullptr )
            {
                comp = new IDF3_COMPONENT( &aIDFBoard );
                comp->SetRefDes( refdes );
                comp->SetPosition( aFootprint->GetPosition().x * scale + dx,
                                   -aFootprint->GetPosition().y * scale + dy,
                                   rotz, top ? IDF3::IDF_LAYER::LYR_TOP : IDF3::IDF_LAYER::LYR_BOTTOM );
                comp->SetPlacement( IDF3::IDF_PLACEMENT::PS_ECAD );
                aIDFBoard.AddComponent( comp );
            }
            else
            {
                double          refX, refY, refA;
                IDF3::IDF_LAYER side;
 
                if( !comp->GetPosition( refX, refY, refA, side ) )
                {
                    comp->SetPosition( aFootprint->GetPosition().x * scale + dx,
                                       -aFootprint->GetPosition().y * scale + dy,
                                       rotz, top ? IDF3::IDF_LAYER::LYR_TOP : IDF3::IDF_LAYER::LYR_BOTTOM );
                    comp->SetPlacement( IDF3::IDF_PLACEMENT::PS_ECAD );
                }
                else
                {
                    // check that the retrieved component matches this one
                    refX = refX - ( aFootprint->GetPosition().x * scale + dx );
                    refY = refY - ( -aFootprint->GetPosition().y * scale + dy );
                    refA = refA - rotz;
                    refA *= refA;
                    refX *= refX;
                    refY *= refY;
                    refX += refY;
 
                    // conditions: same side, X,Y coordinates within 10 microns,
                    // angle within 0.01 degree
                    if( ( top && side == IDF3::IDF_LAYER::LYR_BOTTOM ) || ( !top && side == IDF3::IDF_LAYER::LYR_TOP )
                            || ( refA > 0.0001 ) || ( refX > 0.0001 ) )
                    {
                        comp->GetPosition( refX, refY, refA, side );
 
                        if( m_reporter )
                        {
                            m_reporter->Report(
                                    wxString::Format( "Error exporting footprint %s: duplicate reference designator",
                                                      aFootprint->GetReference() ),
                                    RPT_SEVERITY_ERROR );
                        }
 
                        return;
                    }
                }
            }
 
            double unitScale = m_settings->m_units == IDF_SETTINGS::UNITS::MILS ? pcbIUScale.MILS_PER_IU
                                                                                : pcbIUScale.MM_PER_IU;
 
            IDF3_COMP_OUTLINE_DATA* data = new IDF3_COMP_OUTLINE_DATA( comp, libOutline );
            data->SetOffsets( 0.0, 0.0, standoffHeight * unitScale, 0.0 );
            comp->AddOutlineData( data );
 
            if( m_reporter )
            {
                m_reporter->Report( wxString::Format( _( "Exported extruded body for footprint %s" ),
                                                      aFootprint->GetReference() ),
                                    RPT_SEVERITY_INFO );
            }
        }
    }
}
 
 
VECTOR2D IDF_EXPORTER::getOrigin() const
{
    VECTOR2D origin;
    wxCHECK( m_settings && m_board, origin );
 
    switch( m_settings->m_originMode )
    {
    default:
    case IDF_SETTINGS::COORD_ORIGIN::CENTER:
    {
        BOX2I bbox = m_board->GetBoardEdgesBoundingBox();
        origin = bbox.Centre() * pcbIUScale.MM_PER_IU;
        break;
    }
 
    case IDF_SETTINGS::COORD_ORIGIN::GRID:
        origin = m_board->GetDesignSettings().GetGridOrigin() * pcbIUScale.MM_PER_IU;
        break;
 
    case IDF_SETTINGS::COORD_ORIGIN::DRILL:
        origin = m_board->GetDesignSettings().GetAuxOrigin() * pcbIUScale.MM_PER_IU;
        break;
 
    case IDF_SETTINGS::COORD_ORIGIN::USER:
    {
        double scale = m_settings->m_units == IDF_SETTINGS::UNITS::MM ? pcbIUScale.MM_PER_IU : pcbIUScale.MILS_PER_IU;
        origin = m_settings->m_userOrigin *scale;
        break;
    }
    }
 
    return origin;
}
 
 
bool IDF_EXPORTER::Export( const wxString& aFullFileName ) const
{
    wxCHECK( m_board, false );
    wxCHECK( m_resolver, false );
    wxCHECK( m_settings, false );
 
    IDF3_BOARD idfBoard( IDF3::CAD_TYPE::CAD_ELEC );
 
    // Switch the locale to standard C (needed to print floating point numbers)
    LOCALE_IO toggle;
 
    bool ok = true;
    double scale = pcbIUScale.MM_PER_IU;   // we must scale internal units to mm for IDF
    IDF3::IDF_UNIT idfUnit;
 
    if( m_settings->m_units == IDF_SETTINGS::UNITS::MILS )
    {
        idfUnit = IDF3::IDF_UNIT::UNIT_THOU;
        idfBoard.SetUserPrecision( 1 );
    }
    else
    {
        idfUnit = IDF3::IDF_UNIT::UNIT_MM;
        idfBoard.SetUserPrecision( 5 );
    }
 
    wxFileName brdName = m_board->GetFileName();
 
    idfBoard.SetUserScale( scale );
    idfBoard.SetBoardThickness( m_board->GetDesignSettings().GetBoardThickness() * scale );
    idfBoard.SetBoardName( TO_UTF8( brdName.GetFullName() ) );
    idfBoard.SetBoardVersion( 0 );
    idfBoard.SetLibraryVersion( 0 );
 
    std::ostringstream ostr;
    ostr << "KiCad " << TO_UTF8( GetBuildVersion() );
    idfBoard.SetIDFSource( ostr.str() );
 
    try
    {
        // set up the board reference point
        VECTOR2D origin = getOrigin();
        idfBoard.SetUserOffset( -origin.x, origin.y );
 
        if( m_reporter )
            m_reporter->Report( _( "Exporting board shape" ), RPT_SEVERITY_INFO );
 
        // Export the board outline
        idf_export_outline( m_board, idfBoard );
 
        // Output the drill holes and footprint (library) data.
        for( FOOTPRINT* footprint : m_board->Footprints() )
            exportFootprint( footprint, idfBoard );
 
        if( !idfBoard.WriteFile( aFullFileName, idfUnit, m_reporter ) )
            ok = false;
    }
    catch( const IO_ERROR& ioe )
    {
        if( m_reporter && !idfBoard.GetError().empty() )
            m_reporter->Report( ioe.What(), RPT_SEVERITY_ERROR );
 
        ok = false;
    }
    catch( const std::exception& e )
    {
        if( m_reporter && !idfBoard.GetError().empty() )
            m_reporter->Report( From_UTF8( e.what() ), RPT_SEVERITY_ERROR );
 
        ok = false;
    }
 
    if( ok )
    {
        wxFileName brdname( aFullFileName );
        wxFileName libname( aFullFileName );
 
        brdname.SetExt( FILEEXT::IdfV3BoardFileExtension );
        libname.SetExt( FILEEXT::IdfV3LibraryFileExtension );
 
        m_settings->AddOutput( brdname.GetFullPath() );
        m_settings->AddOutput( libname.GetFullPath() );
 
        if( m_reporter )
        {
            m_reporter->Report( wxString::Format( _( "Wrote IDF board file to %s" ), brdname.GetFullPath() ),
                                RPT_SEVERITY_INFO );
            m_reporter->Report( wxString::Format( _( "Wrote IDF library file to %s" ), libname.GetFullPath() ),
                                RPT_SEVERITY_INFO );
        }
    }
 
    return ok;
}