CoverageSimplifier.h

 
/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2023 Paul Ramsey <pramsey@cleverelephant.ca>
 * Copyright (c) 2023 Martin Davis.
 *
 * 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 <vector>
#include <memory>
#include <geos/export.h>
#include <geos/util/Progress.h>
 
 
namespace geos {
namespace geom {
class Geometry;
class GeometryFactory;
class MultiLineString;
}
namespace coverage {
class CoverageEdge;
}
}
 
namespace geos {
namespace coverage { // geos::coverage

class GEOS_DLL CoverageSimplifier {
    using CoverageEdge = geos::coverage::CoverageEdge;
    using Geometry = geos::geom::Geometry;
    using GeometryFactory = geos::geom::GeometryFactory;
    using MultiLineString = geos::geom::MultiLineString;
 
public:

    CoverageSimplifier(const std::vector<const Geometry*>& coverage);

    static std::vector<std::unique_ptr<Geometry>> simplify(
        std::vector<const Geometry*>& coverage,
        double tolerance,
        geos::util::ProgressFunction* progressFunction = nullptr);
 
    static std::vector<std::unique_ptr<Geometry>> simplify(
        const std::vector<std::unique_ptr<Geometry>>& coverage,
        double tolerance,
        geos::util::ProgressFunction* progressFunction = nullptr);

    static std::vector<std::unique_ptr<Geometry>> simplifyInner(
        std::vector<const Geometry*>& coverage,
        double tolerance,
        geos::util::ProgressFunction* progressFunction);
 
    static std::vector<std::unique_ptr<Geometry>> simplifyInner(
        const std::vector<std::unique_ptr<Geometry>>& coverage,
        double tolerance,
        geos::util::ProgressFunction* progressFunction);

    std::vector<std::unique_ptr<Geometry>> simplify(
        double tolerance, geos::util::ProgressFunction* progressFunction);

    std::vector<std::unique_ptr<Geometry>> simplifyInner(
        double tolerance, geos::util::ProgressFunction* progressFunction);
 
 
private:
 
    // Members
    const std::vector<const Geometry*>& m_input;
    const GeometryFactory* m_geomFactory;
 
    // Methods
    void simplifyEdges(
        std::vector<CoverageEdge*> edges,
        const MultiLineString* constraints,
        double tolerance,
        geos::util::ProgressFunction* progressFunction);
 
    void setCoordinates(
        std::vector<CoverageEdge*>& edges,
        const MultiLineString* lines);
 
    std::vector<bool> getFreeRings(
        const std::vector<CoverageEdge*>& edges) const;
 
 
}; // CoverageSimplifier
 
 
} // geos::coverage
} // geos