GeometricShapeFactory.h

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/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2001-2002 Vivid Solutions Inc.
 * Copyright (C) 2006 Refractions Research Inc.
 *
 * 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: util/GeometricShapeFactory.java rev 1.14 (JTS-1.10+)
 * (2009-03-19)
 *
 **********************************************************************/

#ifndef GEOS_UTIL_GEOMETRICSHAPEFACTORY_H
#define GEOS_UTIL_GEOMETRICSHAPEFACTORY_H

#include <geos/export.h>
#include <cassert>
#include <memory>

#include <geos/geom/Coordinate.h>

#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
#endif

// Forward declarations
namespace geos {
namespace geom {
class Coordinate;
class Envelope;
class Polygon;
class GeometryFactory;
class PrecisionModel;
class LineString;
}
}

namespace geos {
namespace util { // geos::util


class GEOS_DLL GeometricShapeFactory {
protected:
    class Dimensions {
    public:
        Dimensions();
        geom::Coordinate base;
        geom::Coordinate centre;
        double width;
        double height;
        void setBase(const geom::Coordinate& newBase);
        void setCentre(const geom::Coordinate& newCentre);
        void setSize(double size);
        void setWidth(double nWidth);
        void setHeight(double nHeight);

        // Return newly-allocated object, ownership transferred
        std::unique_ptr<geom::Envelope> getEnvelope() const;
    };
    const geom::GeometryFactory* geomFact; // externally owned
    const geom::PrecisionModel* precModel; // externally owned
    Dimensions dim;
    uint32_t nPts;

    geom::Coordinate coord(double x, double y) const;

public:

    GeometricShapeFactory(const geom::GeometryFactory* factory);

    virtual
    ~GeometricShapeFactory() {}

    std::unique_ptr<geom::LineString> createArc(double startAng, double angExtent);

    std::unique_ptr<geom::Polygon> createArcPolygon(double startAng, double angExt);

    std::unique_ptr<geom::Polygon> createCircle();

    std::unique_ptr<geom::Polygon> createRectangle();

    void setBase(const geom::Coordinate& base);

    void setCentre(const geom::Coordinate& centre);

    void setHeight(double height);

    void setNumPoints(uint32_t nNPts);

    void setSize(double size);

    void setWidth(double width);

};

} // namespace geos::util
} // namespace geos

#ifdef _MSC_VER
#pragma warning(pop)
#endif

#endif // GEOS_UTIL_GEOMETRICSHAPEFACTORY_H