ugklinestring.h

linux下一款GIS程序源码

// ugklinestring.h: interface for the UGKLineString class.
//
/************************************************************************/
/*                            UGKLineString                             */
/************************************************************************/

/**
 * Concrete representation of a multi-vertex line.
 */
/*
    继承UGKCurve类，描述一条多顶点的曲线
*/

#ifndef  UGKLineString_H
#define  UGKLineString_H


#include "ugkcurve.h"

class UGKLineString : public UGKCurve  
{
protected:
	int         nPointCount;
	UGKRawPoint *paoPoints;   //UGKRawPoint类型数组，用于存放每个点的坐标

	double      *padfZ; 

	void        Make3D();
	void        Make2D();

public:
	UGKLineString();
	virtual ~UGKLineString();

	virtual int WkbSize() const;

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

	virtual double get_Length() const;
	virtual void StartPoint(UGKPoint *) const;
	virtual void EndPoint(UGKPoint *) const;
	virtual void Value( double, UGKPoint * ) const;

	int         getNumPoints() const { return nPointCount; }
	void        getPoint( int, UGKPoint * ) const;
	double      getX( int i ) const { return paoPoints[i].x; }
	double      getY( int i ) const { return paoPoints[i].y; }
	double      getZ( int i ) const;

	virtual UGKBool  Equals( UGKGeometry * ) const;

	void        setNumPoints( int );
	void        setPoint( int, UGKPoint * );
	void        setPoint( int, double, double, double = 0.0 );
	void        setPoints( int, UGKRawPoint *, double * = NULL );
	void        setPoints( int, double * padfX, double * padfY,
                           double *padfZ = NULL );
	void        addPoint( UGKPoint * );
	void        addPoint( double, double, double = 0.0 );

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



};


int TABGenerateArc(UGKLineString *poLine, int numPoints, 
                   double dCenterX, double dCenterY,
                   double dXRadius, double dYRadius,
                   double dStartAngle, double dEndAngle);


int TABCloseRing(UGKLineString *poRing);
UGKBool UGKPointInRing(UGKPoint *poPoint, UGKLineString *poRing);

#endif