IndexedFacetDistance.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2016 Daniel Baston
 *
 * 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/distance/IndexedFacetDistance.java (f6187ee2 JTS-1.14)
 *
 **********************************************************************/
 
#pragma once
 
#include <geos/operation/distance/FacetSequenceTreeBuilder.h>
 
namespace geos {
namespace operation {
namespace distance {
 
class GEOS_DLL IndexedFacetDistance {
public:
 
    IndexedFacetDistance(const geom::Geometry* g) :
        cachedTree(FacetSequenceTreeBuilder::build(g)),
        baseGeometry(*g)
    {}
 
    static double distance(const geom::Geometry* g1, const geom::Geometry* g2);
 
    static std::unique_ptr<geom::CoordinateSequence> nearestPoints(const geom::Geometry* g1, const geom::Geometry* g2);
 
    double distance(const geom::Geometry* g) const;
 
    bool isWithinDistance(const geom::Geometry* g, double maxDistance) const;
 
    std::vector<GeometryLocation> nearestLocations(const geom::Geometry* g) const;
 
    std::unique_ptr<geom::CoordinateSequence> nearestPoints(const geom::Geometry* g) const;
 
private:
    struct FacetDistance {
        double operator()(const FacetSequence* a, const FacetSequence* b) const
        {
            return a->distance(*b);
        }
    };
 
    std::unique_ptr<geos::index::strtree::TemplateSTRtree<const FacetSequence*>> cachedTree;
    const geom::Geometry& baseGeometry;
 
};
}
}
}