//-------------------------------------------------------------------------------------------------------+
// Copyright (C), 1998-2007, Beijing Tangent Software Co. Ltd.
// = FileName	:   TPGeGLineSeg2D 类
// = Version	:   ver2.0
// = Author		:   wlw
// = CreateDate	:   2002-09-09
// = Description:   TPGeGLineSeg2D 声明
// = Maintainers: 
//                  
//-------------------------------------------------------------------------------------------------------+
#ifndef _TPGEGLINESEG2D_H_
#define _TPGEGLINESEG2D_H_

#ifndef _TPGECURVE2D_H_
#include "TPGeCurve2D.h"
#endif

#ifndef _TGVECTOR2D_H_
#include "TGVector2D.h"
#endif

#ifndef _TPGELINE2D_H_
#include "TPGeLine2D.h"
#endif

#ifndef _TGPOINT_H_
#include "TGPoint.h"
#endif

#ifndef _TTABLE_H_
#include "TTable.h"
#endif

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

#ifndef _TGOBJECT_H_
#include "TGObject.h"
#endif

#ifndef _TGOBJECTLIST_H_
#include "TGObjectList.h"
#endif

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

#ifndef _TGMLINE2D_H_
#include "TGMLine2D.h"
#endif

class TGObject3D;

class GEOAPI TPGeGLineSeg2D : public TPGeGLine2D
{
	DECLARE_RUN_TIME_CLASS(TPGeGLineSeg2D)
		
public:

	TPGeGLineSeg2D();
	
	TPGeGLineSeg2D(const TPGeLine2D& line);

	TPGeGLineSeg2D(const TGVector2D& vt,const TGPoint& pt);

	TPGeGLineSeg2D(const TGPoint& pt0,const TGPoint& pt1);
	virtual ~TPGeGLineSeg2D();

	//重载 TPGeCurve2D
	//存在区间[0,1]
	virtual void GetStartPoint(TGPoint& pt) const;

	virtual void GetEndPoint(TGPoint& pt) const;
	
	virtual bool IsFinite(bool bStart) const;
	
	virtual TGMLine2D* MLinearize(double paDist=0) const;
	
	virtual TPGeCurve2D* GetExtendCurve() const;
	
	virtual double Length() const;
	
	virtual void Reverse();
	
	virtual void Split(const TTable<double>& paTable,TGObjectList& res) const;

	//重载 TGObject3D
	virtual TGObject3D* Convert3D() const;

	//重载 TGObject
	virtual TGObject * Clone() const;
	
	virtual GRelation HitTest(const TGPoint& pt) const;
	
	virtual bool Intersect(const TGObject& obj,TGObjectList& res) const;
	
	virtual bool IsInclude(const TGObject& obj) const;
	
	virtual bool GetExtend2D(TPGeExtend2D& ext) const;
	
	TGPoint GetEndPoint() const;
	
	TGPoint GetMidPoint() const;
	
	const TGPoint&  GetStartPoint() const;
	
	bool IsSameSeg(const TPGeGLineSeg2D& seg,bool bSameDirection = false) const;
	
	bool SubtractBy(const TPGeGLineSeg2D& seg,TGObjectList& res) const;
	
	void SubtractBy(const TGObjectList& oList,TGObjectList& res) const;

};

#endif