//-------------------------------------------------------------------------------------------------------+
// Copyright (C), 1998-2007, Beijing Tangent Software Co. Ltd.
// = FileName	:   TGMCurve2D 类
// = Version	:   ver2.0
// = Author		:   wlw
// = CreateDate	:   2002-09-09
// = Description:   TGMCurve2D 声明
// = Maintainers: 
//                  
//-------------------------------------------------------------------------------------------------------+
#ifndef _TGMCURVE2D_H_
#define _TGMCURVE2D_H_

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

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

#ifndef _TPDLIST_H_
#include "TPDList.h"
#endif

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

#ifndef _TGMATRIX_H_
#include "TGMatrix.h"
#endif

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

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

class TGMLine2D;

class GEOAPI TGMCurve2D:public TPGeCurve2D,public TPDList< TPGeCurve2D >
{
	DECLARE_RUN_TIME_CLASS(TGMCurve2D)
public:
	//construct
	TGMCurve2D();
	TGMCurve2D(const TPGeCurve2D&curve);
	TGMCurve2D(const TGMCurve2D&curve);
	virtual ~TGMCurve2D();


	//override TPGeCurve2D
	virtual bool IsClosed() const;
	virtual bool IsFinite(bool bStart) const;
	
	//只有相邻段有且只有一点交(封闭且段数为2时，有两点交)，段数大于2时子段不能封闭!
	virtual bool IsSelfCross() const;

	virtual void GetTangent(double pa,TPGeLine2D&line) const;
	virtual void Pa2Pt(double pa,TGPoint&pt) const;
	virtual void Pt2Pa(const TGPoint&pt,double&pa) const;
	virtual void GetStartPoint(TGPoint&pt) const;
	virtual void GetEndPoint(TGPoint&pt) const;
	virtual double Integration(double pa0,double pa1) const;
	virtual void Reverse();
	virtual TGMLine2D* MLinearize(double paDist=0) const;
	virtual TGMLine2D* PLinearize(double paDist=0) const;
	virtual TPGeCurve2D* GetSubCurve(double pa0,double pa1) const;
	virtual TGPoint GetSamplePoint() const;
	virtual bool Offset(double offset);

	//override TGObject2D
	virtual void   SetElev(double elev);
	virtual double GetElev() const;
	
	//override TGObject
	//不空，各段有效且前后相连
	virtual bool IsValid() const;
	virtual TGObject* Clone() const;
	virtual void TransformBy(const TGMatrix&matrix);
	//分解为子段
	virtual bool Explode(TGObjectList&res) const;
	virtual bool IsInclude(const TGObject&obj) const;

	//query
	long GetSegNum() const;
	//pa转化为本地参数
	long Pa2Seg(double &pa) const;

};
#endif