//-------------------------------------------------------------------------------------------------------+
// Copyright (C), 1998-2007, Beijing Tangent Software Co. Ltd.
// = FileName	:   TPGeExtend 类
// = Version	:   ver2.0
// = Author		:   wlw
// = CreateDate	:   2002-09-09
// = Description:   TPGeExtend 声明 坐标系中的连续区域
// = Maintainers: 
//                  
//-------------------------------------------------------------------------------------------------------+
#ifndef _TPGEEXTEND_H_
#define _TPGEEXTEND_H_

class GEOAPI TPGeExtend
{
public:

	TPGeExtend(double min = 0,double max = 0);

	virtual ~TPGeExtend();

	void SetRange(double min,double max);
	
	double GetMin() const;
	
	double GetMax() const;
	
	double GetLength() const;
	
	double GetCenter() const;

	//长度为0时代表一点,有效!
	bool IsValid() const;

	bool operator == (const TPGeExtend& ext) const;

	bool operator != (const TPGeExtend& ext) const;
	
	//不相邻
	bool operator >  (const TPGeExtend& ext) const;
	
	bool operator >= (const TPGeExtend& ext) const;
	
	bool operator <  (const TPGeExtend& ext) const;
	
	bool operator <= (const TPGeExtend& ext) const;

	bool IsInside(double x) const;

	bool IsInside(const TPGeExtend& ext) const;

	bool IsInclude(double x) const;
	
	bool IsInclude(const TPGeExtend& ext) const;

	bool IsIntersect(const TPGeExtend& ext) const;
	
	bool IsConnect(const TPGeExtend&ext) const;

	//如果不相交则返回无效TPGeExtend!
	TPGeExtend operator & (const TPGeExtend& ext) const;
	
	TPGeExtend operator + (const TPGeExtend &ext) const;
	
	TPGeExtend& operator += (const TPGeExtend& ext);
	
	void Inflate(double d);

public:
	
	double m_fMin;
	
	double m_fMax;
};

#endif