//-----------------------------------------------------------------------------+
// Copyright (C), 1998-2007, SH Software Co. Ltd.
// = FileName	:   CBArc.h
// = Version	:   ver2.0
// = Author		:   zjq
// = CreateDate	:   2002-09-09
// = Description:   类的声明 圆弧描述，坐标系：UCS
// = Maintainers: 
//                  
//-----------------------------------------------------------------------------+
#ifndef _BARC_H_
#define _BARC_H_

class GEOAPI CBArc 
{
public:
	
	CBArc();
	CBArc(AcGePoint3d& cen,double radius,double startAng,double centAng);
	virtual ~CBArc();
	
	CBArc& operator = (const CBArc& arc);

	//返回相对于起点沿圆弧方向s坐标处的点，S>=0
	AcGePoint3d GetPtAtS(double s);          
	//返回相对于起点沿圆弧方向detaAng角度处的点
	AcGePoint3d GetPtAtAngle(double detaAng) const;

	AcGePoint3d GetStartPoint() const;       //取起点
	AcGePoint3d GetEndPoint() const;         //取尾点
	
	double Length();
	double GetMinX() const;                  //最小X值
	double GetMaxX() const;                  //最大X值
	double GetMinY() const;                  //最小Y值
	double GetMaxY() const;                  //最大Y值

public:
	double m_R;                             //半径
	double m_startAngle;                    //起始点角度
	double m_centAngle;                     //圆心角,>0:逆时针；<0：顺时针
	AcGePoint3d m_centPt;                   //圆心
	AcGePoint3d m_startPt;                  //起点坐标
	AcGePoint3d m_endPt;                    //终点坐标
};
#endif