55 lines
1.1 KiB
C++
55 lines
1.1 KiB
C++
//-------------------------------------------------------------------------------------------------------+
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// Copyright (C), 1998-2007, Beijing Tangent Software Co. Ltd.
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// = FileName : TPGeEllipse 类
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// = Version : ver2.0
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// = Author : wlw
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// = CreateDate : 2002-09-09
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// = Description: TPGeEllipse 声明 方程:x=center.x+aRadius*cos(t);y=center.y+bRadius*sin(t)
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// = Maintainers:
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//
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//-------------------------------------------------------------------------------------------------------+
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#ifndef _TPGEELLIPSE_H_
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#define _TPGEELLIPSE_H_
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#ifndef _TGPOINT_H_
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#include "TGPoint.h"
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#endif
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#ifndef _TWFLAG_H_
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#include "TWFlag.h"
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#endif
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class GEOAPI TPGeEllipse
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{
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public:
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TPGeEllipse();
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TPGeEllipse(const TGPoint& pt,double aRadius,double bRadius);
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virtual ~TPGeEllipse();
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bool operator == (const TPGeEllipse& e) const;
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bool operator != (const TPGeEllipse& e) const;
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bool IsValid() const;
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bool IsCircle() const;
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GRelation HitTest(const TGPoint& pt) const;
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void Pt2Pa(const TGPoint& pt,double& pa) const;
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void Pa2Pt(double pa,TGPoint& pt) const;
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public:
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TGPoint center;
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double a,b;
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};
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#endif
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