//-----------------------------------------------------------------------------+
// Copyright (C), 1998-2007, SH Software Co. Ltd.
// = FileName	:   XCircle类
// = Version	:   ver2.0
// = Author		:   zjq
// = CreateDate	:   2002-09-09
// = Description:   XCircle类声明
// = Maintainers: 
//                  
//-----------------------------------------------------------------------------+
#ifndef _XCIRCLE_H_
#define _XCIRCLE_H_

#ifndef _XSHAPE_H_
#include "XCell.h"
#endif

#ifndef _XPOINT_H_
#include "XPoint.h"
#endif

class XArc;
class XLine;
class Entity;

class GEOAPI XCircle : public XCell
{	
public:
	XCircle();
	XCircle(const XCircle &src);
	XCircle(const ads_point, const ads_point);
	XCircle(const ads_point ptcenter,double dradius);
	XCircle(const Entity &entCircle, ads_matrix mat = NULL);
	XCircle(const XPoint &pt1, const XPoint &pt2, const XPoint &pt3);
	virtual ~XCircle();
	
	virtual bool IsKindOf(TEntityId entType) const;
	virtual TEntityId Type() const;
	virtual void CopyFrom(const XEntity* pSrc);
		
	virtual ShapeType GetShapeType() const;

	virtual int Intersection(const XLine* pLine, ads_point ptrp1 = NULL, ads_point ptrp2 = NULL) const;
	virtual int Intersection(const XArc* pArc, ads_point ptrp1 = NULL, ads_point ptrp2 = NULL) const;
	virtual int Intersection(const XCircle* pCir, ads_point ptrp1 = NULL, ads_point ptrp2 = NULL) const;
	
	virtual int GetExtend(ads_point lowPt, ads_point upPt) const;
	virtual int GetSubArc(const XPoint& ptloc, ads_real dchordLen, XArc& xarcres) const;
	
	virtual int Make(const TCHAR* szlay = NULL) const;
	virtual int Modify(const Entity* pEntity) const;      
	virtual int MakeEntity(const Entity* pEntity) const;
	
	virtual void Center(ads_point ptCen);
	//图形长度，周长
	virtual ads_real GetLength() const;

	virtual	ads_real Area() const;
	
	virtual	int HitTest2d(const XPoint &ptTest) const;
	virtual	int OSnap(int nMode, XPoint &ptPick) const;
	
	//第一象限点圆心变换,求半径
	virtual	void TransUCS(ads_matrix mat);

	int      operator !() const;
	XCircle& operator = (const XCircle &src);
	bool     operator == (const XCircle &src) const;

	XCircle Offset(ads_real dist) const;

	XPoint GetCenterPt();
	XPoint GetCenterPt() const;
	void SetCenterPt(XPoint pt);
	
	double GetRadius() const;
	double GetRadius();
	void SetRadius(double dR);
	bool Set(const XPoint &ptStart, const XPoint &ptOn, const XPoint &ptEnd);
	void Set(const XPoint &diaPt1, const XPoint &diaPt2);

	int PtOnCircle(const XPoint &pt);
public:
	XPoint m_ptCenter;
	double m_dRadius;
};

inline XEntity::TEntityId XCircle::Type() const
{
	return XEntity::eCircle;
}

#endif