OffsetCurveSetBuilder.h

Go to the documentation of this file.

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2011 Sandro Santilli <strk@kbt.io>
 * 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 <geos/geom/Location.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, geom::Location leftLoc,
                  geom::Location 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 addRingBothSides(const geom::CoordinateSequence* coord, double p_distance);

    void addRingSide(const geom::CoordinateSequence* coord,
                     double offsetDistance, int side, geom::Location cwLeftLoc,
                     geom::Location 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) = delete;
    OffsetCurveSetBuilder& operator=(const OffsetCurveSetBuilder& rhs) = delete;

public:

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

    ~OffsetCurveSetBuilder();

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

    void addCurves(const std::vector<geom::CoordinateSequence*>& lineList,
                   geom::Location leftLoc, geom::Location rightLoc);

};

} // namespace geos::operation::buffer
} // namespace geos::operation
} // namespace geos

#ifdef _MSC_VER
#pragma warning(pop)
#endif

#endif // ndef GEOS_OP_BUFFER_OFFSETCURVESETBUILDER_H