//-----------------------------------------------------------------------------+
// Copyright (C), 1998-2007, Beijing Tangent Software Co. Ltd.
// = FileName	:   TPGeGridLine.h
// = Version	:   ver2.0
// = Author		:   xlc
// = CreateDate	:   2002-09-09
// = Description:   类的声明 网格线

// = Maintainers: 
//                  
//-----------------------------------------------------------------------------+
#ifndef _TPGEGRIDLINE_H_
#define _TPGEGRIDLINE_H_

#ifndef _TPGEGLINESEG2D_H_
#include "TPGeGLineSeg2D.h"
#endif

#ifndef _TSQTABLE_H_
#include "TSqTable.h"
#endif

#ifndef _TPGEEXTEND_H_
#include "TPGeExtend.h"
#endif

#ifndef _TPGEGRIDNODE_H_
#include "TPGeGridNode.h"
#endif

#ifndef _TDUALPTRLIST_H_
#include "TDualPtrList.h"
#endif

#ifndef _TPGEGRIDSEG_H_
#include "TPGeGridSeg.h"
#endif

#ifndef _TSPTABLE_H_
#include "TSPTable.h"
#endif

class TPGeCurve2D;
class TPGeLandform;

class GEOAPI TPGeGridLine : public TPGeGLineSeg2D
{
public:
	
	TPGeGridLine();
	
	virtual ~TPGeGridLine();
	
	double GetElev(double x) const;
	
	bool IsVisible(double value) const;

	bool operator <(const TPGeGridLine&) const;
	
	bool operator >(const TPGeGridLine&) const;
	
	void CreateFrom(const TPGeLandform* land,bool bXLine,double startValue);

public:

	//不可见区间
	TSqTable<TPGeExtend> m_allInvisibleExt;

	//与等高线的交点(有序)
	TDualPtrList<TPGeGridNode>  m_allPointElev;

	//立面曲线
	TPGeCurve2D* m_pCurveElev;

	//组成单元格边,NULL代表完整边
	TSPTable<TPGeGridSeg> m_allSeg;
};

#endif