PolygonTriangulator.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2020 Paul Ramsey <pramsey@cleverelephant.ca>
 *
 * 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.
 *
 **********************************************************************/
 
#pragma once
 
#include <geos/triangulate/tri/TriList.h>
#include <geos/triangulate/tri/Tri.h>
 
// Forward declarations
namespace geos {
namespace geom {
class Geometry;
class GeometryFactory;
class Polygon;
}
}
 
namespace geos {
namespace triangulate {
namespace polygon {
 

class GEOS_DLL PolygonTriangulator {
    using Geometry = geos::geom::Geometry;
    using GeometryFactory = geos::geom::GeometryFactory;
    using Polygon = geos::geom::Polygon;
    template<typename TriType>
    using TriList = geos::triangulate::tri::TriList<TriType>;
    using Tri = geos::triangulate::tri::Tri;
 
private:
 
    // Members
 
    const Geometry* inputGeom;
    const GeometryFactory* geomFact;
 
    std::unique_ptr<Geometry> compute();

    void triangulatePolygon(const Polygon* poly, TriList<Tri>& triList);
 
 
public:

    PolygonTriangulator(const Geometry* p_inputGeom)
        : inputGeom(p_inputGeom)
        , geomFact(p_inputGeom->getFactory())
    {}

    static std::unique_ptr<Geometry> triangulate(const Geometry* geom);
 
};
 
 
 
} // namespace geos.triangulate.polygon
} // namespace geos.triangulate
} // namespace geos