ugkpolygon.h

linux下一款GIS程序源码

// ugkpolygon.h: interface for the UGKPolygon class.
//
/************************************************************************/
/*                              UGKPolygon                              */
/************************************************************************/

/**
 * Concrete class representing polygons.
 *
 * Note that the  polygons consist of one outer
 * ring, and zero or more inner rings.  A polygon cannot represent disconnected
 * regions (such as multiple islands in a political body).  The
 * UGKMultiPolygon must be used for this.
 */

#ifndef  UGKPolygon_H
#define  UGKPolygon_H

#include "ugksurface.h"
#include "ugklinearring.h"

class UGKPolygon : public UGKSurface  
{
	int         nRingCount;
	UGKLinearRing **papoRings;

public:
	UGKPolygon();
	virtual ~UGKPolygon();

	virtual const char *getGeometryName() const;
	virtual UGKwkbGeometryType getGeometryType() const;
	virtual UGKGeometry *clone() const;
	virtual void empty();
	virtual void flattenTo2D();

	virtual double      get_Area() const;
	virtual int         Centroid( UGKPoint * poPoint ) const;
	virtual int         PointOnSurface( UGKPoint * poPoint ) const;

	virtual int WkbSize() const;

	virtual int getDimension() const;
	virtual int getCoordinateDimension() const;
	virtual void getEnvelope( UGKEnvelope * psEnvelope ) const;

	virtual UGKBool  Equals( UGKGeometry * ) const;

	void        addRing( UGKLinearRing * );
	void        addRingDirectly( UGKLinearRing * );

	UGKLinearRing *getExteriorRing();
	const UGKLinearRing *getExteriorRing() const;
	int         getNumInteriorRings() const;
	UGKLinearRing *getInteriorRing( int );
	const UGKLinearRing *getInteriorRing( int ) const;

	virtual void closeRings();

};

int   UGKPolygonLabelPoint(UGKPolygon *poPoly, UGKPoint *poLabelPoint);
UGKBool UGKIntersectPointPolygon(UGKPoint *poPoint, UGKPolygon *poPoly);

#endif