BufferBuilder.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2009-2011 Sandro Santilli <strk@kbt.io>
 * Copyright (C) 2008-2010 Safe Software Inc.
 * Copyright (C) 2006-2007 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/BufferBuilder.java r378 (JTS-1.12)
 *
 **********************************************************************/
 
#ifndef GEOS_OP_BUFFER_BUFFERBUILDER_H
#define GEOS_OP_BUFFER_BUFFERBUILDER_H
 
#include <geos/export.h>
 
#include <vector>
 
#include <geos/operation/buffer/BufferOp.h> // for inlines (BufferOp enums)
#include <geos/operation/buffer/OffsetCurveBuilder.h> // for inline (OffsetCurveBuilder enums)
#include <geos/geomgraph/EdgeList.h> // for composition
 
#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 PrecisionModel;
class Geometry;
class GeometryFactory;
}
namespace algorithm {
class LineIntersector;
}
namespace noding {
class Noder;
class SegmentString;
class IntersectionAdder;
}
namespace geomgraph {
class Edge;
class Label;
class PlanarGraph;
}
namespace operation {
namespace buffer {
class BufferSubgraph;
}
namespace overlay {
class PolygonBuilder;
}
}
}
 
namespace geos {
namespace operation { // geos.operation
namespace buffer { // geos.operation.buffer
 
class GEOS_DLL BufferBuilder {
 
public:
    BufferBuilder(const BufferParameters& nBufParams)
        :
        bufParams(nBufParams),
        workingPrecisionModel(nullptr),
        li(nullptr),
        intersectionAdder(nullptr),
        workingNoder(nullptr),
        geomFact(nullptr),
        edgeList(),
        isInvertOrientation(false)
    {}
 
    ~BufferBuilder();
 
 
    void
    setWorkingPrecisionModel(const geom::PrecisionModel* pm)
    {
        workingPrecisionModel = pm;
    }
 
    void
    setNoder(noding::Noder* newNoder)
    {
        workingNoder = newNoder;
    }
 
    void
    setInvertOrientation(bool p_isInvertOrientation)
    {
        isInvertOrientation = p_isInvertOrientation;
    }
 
 
    std::unique_ptr<geom::Geometry> buffer(const geom::Geometry* g, double distance);
 
    std::unique_ptr<geom::Geometry> bufferLineSingleSided(
        const geom::Geometry* g,
        double distance, bool leftSide);
 
private:
 
    static int depthDelta(const geomgraph::Label& label);
 
    const BufferParameters& bufParams;
 
    const geom::PrecisionModel* workingPrecisionModel;
 
    algorithm::LineIntersector* li;
 
    noding::IntersectionAdder* intersectionAdder;
 
    noding::Noder* workingNoder;
 
    const geom::GeometryFactory* geomFact;
 
    geomgraph::EdgeList edgeList;
 
    std::vector<geomgraph::Label*> newLabels;
 
    bool isInvertOrientation;
 
    void computeNodedEdges(std::vector<noding::SegmentString*>& bufSegStr,
                           const geom::PrecisionModel* precisionModel);
    // throw(GEOSException);
 
    void insertUniqueEdge(geomgraph::Edge* e);
 
    void createSubgraphs(geomgraph::PlanarGraph* graph,
                         std::vector<BufferSubgraph*>& list);
 
    void buildSubgraphs(const std::vector<BufferSubgraph*>& subgraphList,
                        overlay::PolygonBuilder& polyBuilder);
 
    noding::Noder* getNoder(const geom::PrecisionModel* precisionModel);
 
 
    std::unique_ptr<geom::Geometry> createEmptyResultGeometry() const;
 
    // Declare type as noncopyable
    BufferBuilder(const BufferBuilder& other) = delete;
    BufferBuilder& operator=(const BufferBuilder& rhs) = delete;
};
 
} // namespace geos::operation::buffer
} // namespace geos::operation
} // namespace geos
 
#ifdef _MSC_VER
#pragma warning(pop)
#endif
 
#endif // ndef GEOS_OP_BUFFER_BUFFERBUILDER_H