ugkcurve.h

linux下一款GIS程序源码

// ugkcurve.h: interface for the UGKCurve class.

/************************************************************************/
/*                               UGKCurve                               */
/************************************************************************/
/**
 * Abstract curve base class.
 */

/*
  UGKCurve类在基类UGKGeometry的基础上只增加了几个函数，没有增加成员变量
  新增加的函数成员也是虚函数，并没有实现
*/

#ifndef  UGKCurve_H
#define  UGKCurve_H


#include "ugkgeometry.h"
#include "ugkpoint.h"

class UGKCurve : public UGKGeometry  
{
public:
	UGKCurve();
	virtual ~UGKCurve();

    virtual double get_Length() const = 0;
	virtual void StartPoint(UGKPoint *) const = 0;
	virtual void EndPoint(UGKPoint *) const = 0;
	virtual int  get_IsClosed() const;
	virtual void Value( double, UGKPoint * ) const = 0;

};

#endif