DelaunayTriangulationBuilder.h

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/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2012 Excensus LLC.
 *
 * This is free software; you can redistribute and/or modify it under
 * the terms of the GNU Lesser General Licence as published
 * by the Free Software Foundation.
 * See the COPYING file for more information.
 *
 **********************************************************************
 *
 * Last port: triangulate/DelaunayTriangulationBuilder.java r524
 *
 **********************************************************************/

#ifndef GEOS_TRIANGULATE_DELAUNAYTRIANGULATIONBUILDER_H
#define GEOS_TRIANGULATE_DELAUNAYTRIANGULATIONBUILDER_H

#include <geos/triangulate/IncrementalDelaunayTriangulator.h>
#include <geos/geom/CoordinateSequence.h>

#include <memory>

namespace geos {
namespace geom {
class Geometry;
class MultiLineString;
class GeometryCollection;
class GeometryFactory;
class Envelope;
}
namespace triangulate {
namespace quadedge {
class QuadEdgeSubdivision;
}
}
}

namespace geos {
namespace triangulate { //geos.triangulate


class GEOS_DLL DelaunayTriangulationBuilder {
public:
    static std::unique_ptr<geom::CoordinateSequence> extractUniqueCoordinates(const geom::Geometry& geom);

    static IncrementalDelaunayTriangulator::VertexList toVertices(const geom::CoordinateSequence& coords);

    static std::unique_ptr<geom::CoordinateSequence> unique(const geom::CoordinateSequence* seq);

private:
    std::unique_ptr<geom::CoordinateSequence> siteCoords;
    double tolerance;
    std::unique_ptr<quadedge::QuadEdgeSubdivision> subdiv;

public:
    DelaunayTriangulationBuilder();

    ~DelaunayTriangulationBuilder() = default;

    void setSites(const geom::Geometry& geom);

    void setSites(const geom::CoordinateSequence& coords);

    inline void
    setTolerance(double p_tolerance)
    {
        this->tolerance = p_tolerance;
    }

private:
    void create();

public:
    quadedge::QuadEdgeSubdivision& getSubdivision();

    std::unique_ptr<geom::MultiLineString> getEdges(const geom::GeometryFactory& geomFact);

    std::unique_ptr<geom::GeometryCollection> getTriangles(const geom::GeometryFactory& geomFact);

    static geom::Envelope envelope(const geom::CoordinateSequence& coords);

};

} //namespace geos.triangulate
} //namespace goes

#endif //GEOS_TRIANGULATE_QUADEDGE_DELAUNAYTRIANGULATIONBUILDER_H