PrecisionReducerTransformer.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2021 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/export.h>
#include <memory>
 
#include <geos/geom/util/GeometryTransformer.h>
 
// Forward declarations
namespace geos {
namespace geom {
class PrecisionModel;
class Geometry;
}
}
 
namespace geos {
namespace precision { // geos.precision
 
class GEOS_DLL PrecisionReducerTransformer : public geom::util::GeometryTransformer {
 
private:
 
    const geom::PrecisionModel& targetPM;
    bool isRemoveCollapsed;
 
    std::unique_ptr<geom::Geometry> reduceArea(const geom::Geometry* geom);
 
    void extend(
        std::vector<geom::Coordinate>& coords,
        std::size_t minLength);
 
 
public:
 
    PrecisionReducerTransformer(
        const geom::PrecisionModel& p_targetPM,
        bool p_isRemoveCollapsed = false)
        : targetPM(p_targetPM)
        , isRemoveCollapsed(p_isRemoveCollapsed)
        {};
 
    static std::unique_ptr<geom::Geometry> reduce(
        const geom::Geometry& geom,
        const geom::PrecisionModel& targetPM,
        bool isRemoveCollapsed = false);
 
 
protected:
 
    std::unique_ptr<geom::CoordinateSequence> transformCoordinates(
        const geom::CoordinateSequence* coords,
        const geom::Geometry* parent) override;
 
    std::unique_ptr<geom::Geometry> transformPolygon(
        const geom::Polygon* geom,
        const geom::Geometry* parent) override;
 
    std::unique_ptr<geom::Geometry> transformMultiPolygon(
        const geom::MultiPolygon* geom,
        const geom::Geometry* parent) override;
 
 
};
 
} // namespace geos.precision
} // namespace geos