//-------------------------------------------------------------------------------------------------------+
// Copyright (C), 1998-2007, Beijing Tangent Software Co. Ltd.
// = FileName	:   TPGeCircle2D 类
// = Version	:   ver2.0
// = Author		:   wlw
// = CreateDate	:   2002-09-09
// = Description:   TPGeCircle2D 声明
// = Maintainers: 
//                  
//-------------------------------------------------------------------------------------------------------+
#ifndef _TPGECIRCLE2D_H_
#define _TPGECIRCLE2D_H_

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

#ifndef _TPGECIRCLE_H_
#include "TPGeCircle.h"
#endif

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

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

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

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

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

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

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

class GEOAPI TPGeCircle2D : public TPGeCurve2D,public TPGeCircle
{
	DECLARE_RUN_TIME_CLASS(TPGeCircle2D)

public:
	
	TPGeCircle2D(bool bUnclock = true);
	
	TPGeCircle2D(const TGPoint& pt,double r,bool bUnclock = true);
	
	TPGeCircle2D(const TPGeCircle& circle,bool bUnclock = true);
	
	TPGeCircle2D(const TGPoint& pt0,const TGPoint& pt1,const TGPoint& pt2);
	
	TPGeCircle2D(const TGPoint& pt0,const TGPoint& pt1,double angle);
	
	virtual ~TPGeCircle2D();

	//正向圆参数为正向弧度，反向圆参数为反向弧度
	virtual void Pa2Pt(double pa,TGPoint& pt) const;
	
	//返回区间[0,2PI)
	virtual void Pt2Pa(const TGPoint& pt,double& pa) const;

	virtual void Reverse();
	
	virtual void GetTangent(double pa,TPGeLine2D& line) const;

	virtual bool IsClosed() const;
	
	virtual bool IsFinite(bool bStart) const;
	
	virtual bool IsClockwise() const;

	virtual double Integration(double pa0,double pa1) const;
	
	virtual double Area() const;
	
	virtual double Length() const;

	virtual TGMLine2D* MLinearize(double paDist = 0) const;
	
	virtual TGMLine2D* PLinearize(double paDist = 0) const;

	virtual double GetMLinePrec() const;
	
	virtual void Split(const TTable<double> & paTable,TGObjectList& res) const;
	
	virtual TPGeCurve2D* GetSubCurve(double pa0,double pa1) const;
	
	virtual bool Offset(double offset);

	//重载 TGObject2D
	virtual void SetElev(double elev);
	virtual double GetElev() const;

	//重载 TGObject
	virtual bool IsValid() const;

	virtual void TransformBy(const TGMatrix& matrix);
	
	virtual TGObject * Clone() const;
	
	virtual bool Intersect(const TGObject& obj,TGObjectList& res) const;
	
	virtual bool IsInclude(const TGObject& obj) const;
	
	virtual GRelation HitTest(const TGPoint& pt) const;
	
	virtual bool GetExtend2D(TPGeExtend2D& ext) const;

	//参数点按圆曲线方向排列
	void Init(const TGPoint& pt0,const TGPoint& pt1,const TGPoint& pt2);
	
	//angle决定朝向
	void Init(const TGPoint& pt0,const TGPoint& pt1,double angle);

	bool IsSameCircle(const TPGeCircle2D& cir,bool bSameDirection = false) const;
	
	static void SetMLinePreci(double preci);
	
public:
	
	//默认为0.005
	static double g_fMLinePreci;
};

#endif