GeometricShapeFactory.h

/**********************************************************************
 *
 * 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 <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
                geom::Envelope* getEnvelope() const;
        };
        const geom::GeometryFactory* geomFact; // externally owned
        const geom::PrecisionModel* precModel; // externally owned
        Dimensions dim;
        int nPts;
 
        geom::Coordinate coord(double x, double y) const;
 
public:

        GeometricShapeFactory(const geom::GeometryFactory *factory);
 
        virtual ~GeometricShapeFactory() {}

        geom::LineString* createArc(double startAng, double angExtent);

        geom::Polygon* createArcPolygon(double startAng, double angExt);

        geom::Polygon* createCircle();

        geom::Polygon* createRectangle();

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

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

        void setHeight(double height);

        void setNumPoints(int 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