AbstractPreparedPolygonContains.h

/**********************************************************************
 * $Id: AbstractPreparedPolygonContains.h 2159 2008-08-18 16:27:02Z mloskot $
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.refractions.net
 *
 * 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.
 *
 *
 **********************************************************************/

#ifndef GEOS_GEOM_PREP_ABSTRACTPREPAREDPOLYGONCONTAINS_H
#define GEOS_GEOM_PREP_ABSTRACTPREPAREDPOLYGONCONTAINS_H

#include <geos/geom/prep/PreparedPolygonPredicate.h> // inherited


// forward declarations
namespace geos {
        namespace geom { 
                class Geometry;

                namespace prep { 
                        class PreparedPolygon;
                }
        }
}


namespace geos {
namespace geom { // geos::geom
namespace prep { // geos::geom::prep

class AbstractPreparedPolygonContains : public PreparedPolygonPredicate 
{
private:
        // information about geometric situation
        bool hasSegmentIntersection;
        bool hasProperIntersection;
        bool hasNonProperIntersection;

        bool isProperIntersectionImpliesNotContainedSituation( const geom::Geometry * testGeom);

        bool isSingleShell( const geom::Geometry & geom);
        
        void findAndClassifyIntersections( const geom::Geometry * geom);

protected:
        bool requireSomePointInInterior;

        bool eval( const geom::Geometry * geom);

        virtual bool fullTopologicalPredicate( const geom::Geometry * geom) =0;

public:
        AbstractPreparedPolygonContains( const PreparedPolygon * const prepPoly) 
        :       PreparedPolygonPredicate( prepPoly),
                hasSegmentIntersection( false),
                hasProperIntersection( false),
                hasNonProperIntersection( false),
                requireSomePointInInterior(true)
        { }

        AbstractPreparedPolygonContains( const PreparedPolygon * const prepPoly, bool requireSomePointInInterior) 
        :       PreparedPolygonPredicate( prepPoly),
                hasSegmentIntersection( false),
                hasProperIntersection( false),
                hasNonProperIntersection( false),
                requireSomePointInInterior(requireSomePointInInterior)
        { }

        virtual ~AbstractPreparedPolygonContains()
        { }

};

} // geos::geom::prep
} // geos::geom
} // geos

#endif // GEOS_GEOM_PREP_ABSTRACTPREPAREDPOLYGONCONTAINS_H
/**********************************************************************
 * $Log$
 **********************************************************************/

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