OffsetCurveSetBuilder.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2011 Sandro Santilli <strk@keybit.net>
 * Copyright (C) 2006 Refractions Research Inc.
 *
 * This is free software; you can redistribute and/or modify it under
 * the terms of the GNU Lesser General Public Licence as published
 * by the Free Software Foundation. 
 * See the COPYING file for more information.
 *
 **********************************************************************
 *
 * Last port: operation/buffer/OffsetCurveSetBuilder.java r378 (JTS-1.12)
 *
 **********************************************************************/
 
#ifndef GEOS_OP_BUFFER_OFFSETCURVESETBUILDER_H
#define GEOS_OP_BUFFER_OFFSETCURVESETBUILDER_H
 
#include <geos/export.h>
 
#include <vector>
 
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
#endif
 
// Forward declarations
namespace geos {
        namespace geom {
                class Geometry;
                class CoordinateSequence;
                class GeometryCollection;
                class Point;
                class LineString;
                class LinearRing;
                class Polygon;
        }
        namespace geomgraph {
                class Label;
        }
        namespace noding {
                class SegmentString;
        }
        namespace operation {
                namespace buffer {
                        class OffsetCurveBuilder;
                }
        }
}
 
namespace geos {
namespace operation { // geos.operation
namespace buffer { // geos.operation.buffer

class GEOS_DLL OffsetCurveSetBuilder {
 
private:
 
        // To keep track of newly-created Labels.
        // Labels will be relesed by object dtor
        std::vector<geomgraph::Label*> newLabels;
 
        const geom::Geometry& inputGeom;
 
        double distance;
 
        OffsetCurveBuilder& curveBuilder;

        std::vector<noding::SegmentString*> curveList;

        void addCurve(geom::CoordinateSequence *coord, int leftLoc,
                        int rightLoc);
 
        void add(const geom::Geometry& g);
 
        void addCollection(const geom::GeometryCollection *gc);

        void addPoint(const geom::Point *p);
 
        void addLineString(const geom::LineString *line);
 
        void addPolygon(const geom::Polygon *p);

        void addPolygonRing(const geom::CoordinateSequence *coord,
                        double offsetDistance, int side, int cwLeftLoc,
                        int cwRightLoc);

        bool isErodedCompletely(const geom::LinearRing* ringCoord,
      double bufferDistance);

        bool isTriangleErodedCompletely(const geom::CoordinateSequence *triCoords,
                        double bufferDistance);
 
    // Declare type as noncopyable
    OffsetCurveSetBuilder(const OffsetCurveSetBuilder& other);
    OffsetCurveSetBuilder& operator=(const OffsetCurveSetBuilder& rhs);
 
public:

        OffsetCurveSetBuilder(const geom::Geometry& newInputGeom,
                double newDistance, OffsetCurveBuilder& newCurveBuilder);

        ~OffsetCurveSetBuilder();

        std::vector<noding::SegmentString*>& getCurves();

        //
        void addCurves(const std::vector<geom::CoordinateSequence*>& lineList,
                int leftLoc, int rightLoc);
 
};
 
} // namespace geos::operation::buffer
} // namespace geos::operation
} // namespace geos
 
#ifdef _MSC_VER
#pragma warning(pop)
#endif
 
#endif // ndef GEOS_OP_BUFFER_OFFSETCURVESETBUILDER_H