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

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

class TGMeshNode;
class TPGeCurve2D;
class TGMesh;

class GEOAPI TGMeshEdge : public TWFlag
{
	friend class TPGeCurveMesh;
public:
	TGMeshEdge(const TPGeCurve2D* pCurve,TGMeshNode* pNode1,TGMeshNode* pNode2);
	virtual ~TGMeshEdge();

	const TPGeCurve2D* GetCurve()const;
	const TGMeshNode* GetNode(int i=1)const;
	bool IsLine()const;
	TGMeshNode* GetNextNode(TGMeshNode*pNode)const;

	bool operator > (const TGMeshEdge&edge)const;
	bool operator < (const TGMeshEdge&edge)const;

	TGMeshEdge* FindNextEdge(TGMeshNode* &pNodeStart,TGMesh*pMesh);
	TGMeshEdge* FindPreEdge(TGMeshNode* &pNodeStart,TGMesh*pMesh);
	TGMesh* FindMesh(int i=1);

	TGMesh* FindSDMesh();
	TGMeshEdge* FindNextSDEdge(TGMesh*pMesh);
	TGMeshEdge* FindPreSDEdge(TGMesh*pMesh);

public:
	//角度排序用
	double m_fAngle;
	//引用，以node1->node2为边的网格和以node2->node1为边的网格
	TGMesh *m_pMesh1,*m_pMesh2;

protected:
	const TPGeCurve2D *m_pCurve;
	TGMeshNode *m_pNode1,*m_pNode2;

};
#endif