IndexedDistanceToPoint.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2023 Martin Davis <mtnclimb@gmail.com>
 *
 * 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: algorithm/construct/IndexedDistanceToPoint.java
 * https://github.com/locationtech/jts/commit/d92f783163d9440fcc10c729143787bf7b9fe8f9
 *
 **********************************************************************/
 
#pragma once
 
#include <geos/geom/CoordinateSequence.h>
#include <geos/geom/Geometry.h>
#include <geos/geom/Point.h>
#include <geos/algorithm/construct/IndexedPointInPolygonsLocator.h>
#include <geos/operation/distance/IndexedFacetDistance.h>
 
namespace geos {
namespace algorithm { // geos::algorithm
namespace construct { // geos::algorithm::construct
 
class GEOS_DLL IndexedDistanceToPoint {
    using Geometry = geos::geom::Geometry;
    using Point = geos::geom::Point;
    using IndexedFacetDistance = geos::operation::distance::IndexedFacetDistance;
 
public:
    IndexedDistanceToPoint(const Geometry& geom);
 
    double distance(const Point& pt);
 
    std::unique_ptr<geom::CoordinateSequence> nearestPoints(const Point& pt);
 
private:
    void init();
 
    bool isInArea(const Point& pt);
 
    //-- members
    const Geometry& targetGeometry;
    std::unique_ptr<operation::distance::IndexedFacetDistance> facetDistance;
    std::unique_ptr<IndexedPointInPolygonsLocator> ptLocator;
 
};
 
}}}