GeometryPrecisionReducer.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2012 Sandro Santilli <strk@kbt.io>
 *
 * 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: precision/GeometryPrecisionReducer.cpp rev. 1.10 (JTS-1.7)
 *
 **********************************************************************/
 
#pragma once
 
#include <geos/export.h>
#include <geos/geom/GeometryFactory.h> // for GeometryFactory::Ptr
#include <memory> // for unique_ptr
 
// Forward declarations
namespace geos {
namespace geom {
class PrecisionModel;
class GeometryFactory;
class Geometry;
}
}
 
namespace geos {
namespace precision { // geos.precision
 
class GEOS_DLL GeometryPrecisionReducer {
 
private:
 
    // Externally owned
    const geom::GeometryFactory* newFactory;
 
    const geom::PrecisionModel& targetPM;
 
    bool removeCollapsed;
    bool changePrecisionModel;
    bool useAreaReducer;
    bool isPointwise;
 
    std::unique_ptr<geom::Geometry> fixPolygonalTopology(const geom::Geometry& geom);
 
    geom::GeometryFactory::Ptr createFactory(
        const geom::GeometryFactory& oldGF,
        const geom::PrecisionModel& newPM);
 
    std::unique_ptr<geom::Geometry> changePM(
        const geom::Geometry* geom,
        const geom::PrecisionModel& newPM);
 
    GeometryPrecisionReducer(GeometryPrecisionReducer const&); /*= delete*/
    GeometryPrecisionReducer& operator=(GeometryPrecisionReducer const&); /*= delete*/
 
public:
 
    static std::unique_ptr<geom::Geometry>
    reduce(const geom::Geometry& g, const geom::PrecisionModel& precModel);
 
    static std::unique_ptr<geom::Geometry>
    reducePointwise(const geom::Geometry& g, const geom::PrecisionModel& precModel);
 
    static std::unique_ptr<geom::Geometry>
    reduceKeepCollapsed(const geom::Geometry& g, const geom::PrecisionModel& precModel);
 
    GeometryPrecisionReducer(const geom::PrecisionModel& pm)
        : newFactory(nullptr)
        , targetPM(pm)
        , removeCollapsed(true)
        , changePrecisionModel(false)
        , useAreaReducer(false)
        , isPointwise(false)
    {}
 
    GeometryPrecisionReducer(const geom::GeometryFactory& changeFactory)
        : newFactory(&changeFactory)
        , targetPM(*(changeFactory.getPrecisionModel()))
        , removeCollapsed(true)
        , changePrecisionModel(false)
        , useAreaReducer(false)
        , isPointwise(false)
    {}
 
    void
    setRemoveCollapsedComponents(bool remove)
    {
        removeCollapsed = remove;
    }
 
    void
    setChangePrecisionModel(bool change)
    {
        changePrecisionModel = change;
    }
 
    void
    setUseAreaReducer(bool useAR)
    {
        useAreaReducer = useAR;
    }
 
    void
    setPointwise(bool pointwise)
    {
        isPointwise = pointwise;
    }
 
    std::unique_ptr<geom::Geometry> reduce(const geom::Geometry& geom);
 
};
 
} // namespace geos.precision
} // namespace geos