//-------------------------------------------------------------------------------------------------------+
// Copyright (C), 1998-2007, Beijing Tangent Software Co. Ltd.
// = FileName	:   TPGeDscEdge 类
// = Version	:   ver2.0
// = Author		:   wlw
// = CreateDate	:   2002-09-09
// = Description:   TPGeDscEdge 声明 离散无向边集合
// = Maintainers: 
//                  
//-------------------------------------------------------------------------------------------------------+
#ifndef _TPGEDSCEDGE_H_
#define _TPGEDSCEDGE_H_

#ifndef _TWFLAG_H_
#include "TWFlag.h"
#endif

#ifndef _TPGEFITPATH_H_
#include "TPGeFitPath.h"
#endif

#ifndef _TPGEEXTEND2D_H_
#include "TPGeExtend2D.h"
#endif

class TPGeGLineSeg2D;
class TPGeDscPoint;
class TPGeFitTriangle;

class GEOAPI TPGeDscEdge : public TWFlag
{
public:

	//同时建立点连接!
	TPGeDscEdge(TPGeDscPoint* p0,TPGeDscPoint* p1,double len = 0);
	
	virtual ~TPGeDscEdge();
	
	//取另一个点
	TPGeDscPoint* GetNextPoint(TPGeDscPoint* pPt) const;
	
	//判断两边是否交叉、重叠
	bool IsCrossWith(TPGeDscEdge* pEdge) const;
	
	//计算一般线性插值点,失败返回NULL
	TPGeDscPoint* GetFitPoint(double dz);
	
	//从这一边起构造拟合路径,沿途边加VISITED标志
	void ConnectPath(TPGeFitPath& path);
	
	void GetExtend2D(TPGeExtend2D& ext);

	TPGeGLineSeg2D* CreateEdge();

	double GetMinZ();

	bool operator >(const TPGeDscEdge& e) const;
	
	bool operator <(const TPGeDscEdge& e) const;

public:
	
	//第一点，第二点<引用>
	TPGeDscPoint*pPt0,*pPt1;

	//当前拟合点<引用>
	TPGeDscPoint*pPtFit;    

	//边长
	double length;      
	
	//相领的两个三角
	TPGeFitTriangle* pTrgLeft,*pTrgRight;
};

#endif