//-----------------------------------------------------------------------------+
// Copyright (C), 1998-2007, SH Software Co. Ltd.
// = FileName	:   XLinearEnt.h
// = Version	:   ver2.0
// = Author		:   zjq
// = CreateDate	:   2002-09-09
// = Description:   线性图形基类XLinearEnt类的声明
// = Maintainers: 
//                  
//-----------------------------------------------------------------------------+
#ifndef _XLINEARENT_H_
#define _XLINEARENT_H_

#ifndef _XCURVE_H_
#include "XCurve.h"
#endif

class XArc;
class XCircle;
class GEOAPI XLinearEnt : public XCurve
{
public:
	virtual bool IsKindOf(TEntityId entType) const;
	virtual TEntityId Type() const;

	virtual void TransformBy(ads_matrix mat);
	virtual int GetExtend(XPoint &ptlow, XPoint &ptup) const;
	//图形长度，周长
	virtual ads_real GetLength() const;		
	virtual int Make(const TCHAR *szlay = NULL) const;
	virtual int MakeEntity(const Entity* pEntity) const;

	//  0--错误；1－左边；2－右边；3－起始点；4－终止点；5－线内；6－起始侧延长线；7－终止侧延长线
	virtual int HitTest2d(const XPoint &ptTest) const;

	virtual XPoint MidPoint() const;
	virtual void SetPoints(const XPoint& pt1, const XPoint& pt2);
	virtual int OSnap(int nMode, XPoint &ptPick) const;
	virtual int Intersection(const XArc* pArc, ads_point ptrp1 = NULL, ads_point ptrp2 = NULL) const;
	virtual int Intersection(const XCircle* pCircle, ads_point ptrp1 = NULL, ads_point ptrp2 = NULL) const;
	virtual void CopyFrom(const XEntity* pImpSrc);

protected:
			 XLinearEnt();
	virtual ~XLinearEnt();
};

#endif