{

public:

// coordinates for clipper are multiplied in case of geographic coordinate systems

double conversionFactor;

ClipperConverter() : conversionFactor(1.0){ }

ClipperConverter(IShapefile* sf) {

this->SetConversionFactor(sf);

}

void SetConversionFactor(IShapefile* sf);

// Old Clipper lib:

// ClipperLib::Polygons* Shape2ClipperPolygon(IShape* shp);

// IShape* ClipperPolygon2Shape(ClipperLib::Polygons* polygon);

// static ClipperLib::Polygons* ClipPolygon(ClipperLib::Polygons* polyClip, ClipperLib::Polygons* polySubject, ClipperLib::ClipType operation);

// Clipper lib v6+ uses paths instead of polygons:

ClipperLib::Paths * Shape2ClipperPolygon(IShape* shp);

IShape* ClipperPolygon2Shape(ClipperLib::Paths* polygon);

static ClipperLib::Paths* ClipPolygon(ClipperLib::Paths* polyClip, ClipperLib::Paths* polySubject, ClipperLib::ClipType operation);

static IShape* ClipPolygon(IShape* shapeClip, IShape* shapeSubject, PolygonOperation operation);

static void AddPolygons(IShapefile* sf, ClipperLib::Clipper& clp, ClipperLib::PolyType clipType, bool selectedOnly);