export gencad: clean and update old code. Should not really change the export.

- code refactory.
- allows export to be done from kicad-cli (kicad-cli code is not yet updated)
Need more work.

pcbnew/CMakeLists.txt

@@ -209,6 +209,7 @@ set( PCBNEW_EXPORTERS
     exporters/export_d356.cpp
     exporters/export_footprint_associations.cpp
     exporters/export_gencad.cpp
+    exporters/export_gencad_writer.cpp
     exporters/export_idf.cpp
     exporters/export_svg.cpp
     exporters/step/exporter_step.cpp

pcbnew/exporters/export_gencad_writer.h

@@ -0,0 +1,91 @@
+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 1992-2023 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 3 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 <http://www.gnu.org/licenses/>.
+ */
+
+class BOARD;
+class wxString;
+struct aFile;
+
+class GENCAD_EXPORTER
+{
+public:
+    GENCAD_EXPORTER( BOARD* aBoard ):
+        m_board( aBoard ),
+        m_file( nullptr ),
+        m_flipBottomPads( false ),
+        m_useUniquePins( false ),
+        m_useIndividualShapes( false ),
+        m_storeOriginCoords( false )
+
+    {
+    }
+
+    /** Export a genCAD file
+     * @param aFullFileName is the full filenam to create
+     * @return true on success
+     */
+    bool WriteFile( wxString& aFullFileName );
+
+    /// Set the coordinates offet when exporting items
+    void SetPlotOffet( VECTOR2I aOffset ) { GencadOffset = aOffset; }
+
+    /// Flip pad shapes on the bottom side
+    void FlipBottomPads( bool aFlip ) { m_flipBottomPads = aFlip; }
+
+    /// Make pin names unique
+    void UsePinNamesUnique( bool aUnique ) { m_useUniquePins = aUnique; }
+
+    /// Make pad shapes unique
+    void UseIndividualShapes( bool aUnique ) { m_useIndividualShapes = aUnique; }
+
+    ///Store coord origin in genCAD file
+    void StoreOriginCoordsInFile( bool aStore ) { m_storeOriginCoords = aStore; }
+
+private:
+    /// Creates the header section
+    bool CreateHeaderInfoData();
+    void CreateArtworksSection();
+    void CreateTracksInfoData();
+    void CreateBoardSection();
+    void CreateComponentsSection();
+    void CreateDevicesSection();
+    void CreateRoutesSection();
+    void CreateSignalsSection();
+    void CreateShapesSection();
+    void CreatePadsShapesSection();
+    void FootprintWriteShape( FOOTPRINT* aFootprint, const wxString& aShapeName );
+    const wxString getShapeName( FOOTPRINT* aFootprint );
+
+    double MapXTo( int aX );
+    double MapYTo( int aY );
+
+
+private:
+    BOARD* m_board;
+    wxString m_fullFileName;
+    FILE* m_file;
+
+    // Export options
+    bool m_flipBottomPads;
+    bool m_useUniquePins;
+    bool m_useIndividualShapes;
+    bool m_storeOriginCoords;
+
+    // These are the export origin (the auxiliary axis)
+    VECTOR2I GencadOffset;
+};