155 lines
3.9 KiB
C++
155 lines
3.9 KiB
C++
//-----------------------------------------------------------------------------+
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// Copyright (C), 1998-2007, Beijing Tangent Software Co. Ltd.
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// = FileName : TPGeCurve2D.h
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// = Version : ver2.0
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// = Author : xlc
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// = CreateDate : 2002-09-09
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// = Description: 类的声明 ,平面有向连续参数曲线
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// 参数延曲线方向增长,如果有起点，起点参数0,如果有终点，终点参数为1
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// = Maintainers:
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//
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//-----------------------------------------------------------------------------+
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#ifndef _TPGECURVE2D_H_
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#define _TPGECURVE2D_H_
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#ifndef _TGOBJECT2D_H_
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#include "TGObject2D.h"
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#endif
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#ifndef _TGPOINT_H_
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#include "TGPoint.h"
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#endif
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#ifndef _TTABLE_H_
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#include "TTable.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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#ifndef _TGOBJECT_H_
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#include "TGObject.h"
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#endif
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#ifndef _TPGELINE2D_H_
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#include "TPGeLine2D.h"
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#endif
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#ifndef _TGOBJECTLIST_H_
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#include "TGObjectList.h"
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#endif
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class TGMLine2D;
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class TGObject3D;
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class GEOAPI TPGeCurve2D : public TGObject2D
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{
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DECLARE_RUN_TIME_CLASS(TPGeCurve2D)
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public:
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virtual ~TPGeCurve2D();
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virtual void GetStartPoint(TGPoint& pt) const;
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virtual void GetEndPoint(TGPoint& pt) const;
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//是否封闭曲线,封闭曲线一定是有限曲线
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virtual bool IsClosed() const;
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//非曲线段必须重载!
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//是否有起点或终点
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virtual bool IsFinite(bool bStart) const;
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//存在重复子集
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virtual bool IsSelfCross() const;
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//用于封闭不自交曲线!
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virtual bool IsClockwise() const;
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//由曲线参数得到点
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virtual void Pa2Pt(double pa,TGPoint& pt) const;
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//由点得到曲线参数，适用于非自交时!
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virtual void Pt2Pa(const TGPoint& pt,double& pa) const;
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//取正切线，返回单位向量
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virtual void GetTangent(double pa,TPGeLine2D& line) const;
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//对[pa0,pa1]进行面积积分
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virtual double Integration(double pa0,double pa1) const;
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//用于封闭不自交曲线!
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virtual double Area() const;
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//用于有限曲线
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//此处实现了求复合曲线的长度,基本曲线类要重载
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virtual double Length() const;
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//反向
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virtual void Reverse();
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//用于有限曲线,如果paDist<=0,则使用该实体默认精度
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//此处实现了曲线段的线性化,有限曲线但不是曲线段时，或为了提高效率子类可能需要重载
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virtual TGMLine2D* MLinearize(double paDist = 0) const;
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//,尽量转化为TGPLine2D，其余同上
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virtual TGMLine2D* PLinearize(double paDist = 0) const;
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//取线型化的默认精度
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virtual double GetMLinePrec() const;
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//取延伸曲线,外部析构
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virtual TPGeCurve2D* GetExtendCurve() const;
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//取子曲线段，外部析构
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//取同曲线方向的子曲线,pa0,pa1必须有效,不封闭时必须pa1>pa0,封闭时pa0==pa1表示一点切割
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virtual TPGeCurve2D* GetSubCurve(double pa0,double pa1) const;
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//按参数表分解曲线,paTable为有序表,参数表中参数必须有效!允许冗余参数
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//此处实现了曲线段的Split，无性能要求曲线段子类可不重载
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virtual void Split(const TTable<double> & paTable,TGObjectList& res) const;
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//取样测试点,不取端点、节点之类的不光滑点!
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virtual TGPoint GetSamplePoint() const;
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//不能是自交曲线!!不能切割三维实体!
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//封闭曲线切割结果为左为内，右为外，不考虑曲线方向!
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//不封闭的有限曲线段切割时,要求其可以正确进行结果分发时的左右测试!!
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//切割曲线时交点处全要打断,子类如重载，也应满足此要求!
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//不完全适用于切割自交曲线,即切割在自交处一般会出错!!
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//子类需要加速才需要重载
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virtual void Cut(const TGObject& obj,TGObjectList& left,TGObjectList& right,TGObjectList& mid) const;
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//左偏移为负，右偏移为正，失败返回false且不改变数据
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virtual bool Offset(double offset);
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//默认是转化为TGPCurve3D
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virtual TGObject3D* Convert3D() const;
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//此处实现了任意曲线的点测试(封闭时测试GR_OUTSIDE/GR_INSIDE),曲线封闭时不能自交!!
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//子类无特别速度要求时不需重载
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virtual GRelation HitTest(const TGPoint& pt) const;
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//在TGObject2D基础上过滤了TGRegion2D
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virtual bool IsInclude(const TGObject& obj) const;
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void GetMidPoint(TGPoint&pt)const;
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//两段曲线是否可以连接,终点与seg的起点相同
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bool IsConnect(const TPGeCurve2D&seg)const;
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//是否有两端点
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bool IsCurveSeg()const;
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//ok有限曲线(封闭或是曲线段)
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bool IsFinite()const;
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//完全无限曲线
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bool IsInfinite()const;
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//有限曲线的面积积分
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double AllIntegration()const;
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};
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#endif |