//-------------------------------------------------------------------------------------------------------+
// Copyright (C), 1998-2007, Beijing Tangent Software Co. Ltd.
// = FileName	:   TGTriangle2D 类
// = Version	:   ver2.0
// = Author		:   wlw
// = CreateDate	:   2002-09-09
// = Description:   TGTriangle2D 声明 三角形平面域
// = Maintainers: 
//                  
//-------------------------------------------------------------------------------------------------------+
#ifndef _TGTRIANGLE2D_H_
#define _TGTRIANGLE2D_H_

#ifndef _TGNPOLYGON2D_H_
#include "TGNPolygon2D.h"
#endif

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

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

class TGObject;

class GEOAPI TGTriangle2D:public TGNPolygon2D
{
public:
	//construct
	TGTriangle2D();
	virtual ~TGTriangle2D();
	
	//检查是否逆时针方向曲线
	TGTriangle2D(const TGPoint&pt0,const TGPoint&pt1,const TGPoint&pt2,bool bCheck=true);

	//override TGObject
	virtual bool IsValid()const;
	virtual bool Explode(TGObjectList&res)const;
	virtual TGObject* Clone()const;
};
#endif