144 lines
3.7 KiB
C++
144 lines
3.7 KiB
C++
//-----------------------------------------------------------------------------+
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// Copyright (C), 1998-2007, Beijing Tangent Software Co. Ltd.
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// = FileName : TGRegion2D.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 平面任意连通域，边界可以是无限曲线，可以无外界，外边界不封闭时，洞边界也可以是无限曲线
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// 对于封闭边界线，外边界是逆时针方向,内边界是顺时针方向
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// = Maintainers:
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//
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//-----------------------------------------------------------------------------+
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#ifndef _TGREGION2D_H_
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#define _TGREGION2D_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 _TGOBJECTLIST_H_
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#include "TGObjectList.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 _TGPOINT_H_
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#include "TGPoint.h"
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#endif
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#ifndef _TGMATRIX_H_
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#include "TGMatrix.h"
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#endif
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#ifndef _TPGEEXTEND2D_H_
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#include "TPGeExtend2D.h"
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#endif
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class TGPolygon2D;
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class TPGeCurve2D;
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class GEOAPI TGRegion2D : public TGObject2D
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{
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DECLARE_RUN_TIME_CLASS(TGRegion2D)
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public:
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virtual ~TGRegion2D();
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//外部不负责析构
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virtual TPGeCurve2D* GetBoundary(long i) const;
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//返回边界数，无边界时也返回1
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//第一个为外边界，GetBoundary(0)=NULL代表无外界。如果数量大于1,其余为内边界
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virtual long GetBoundaryNum() const;
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virtual bool Inter(const TGRegion2D&face,TGObjectList&res) const;
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//如果不能合并为连通域，返回NULL
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virtual TGRegion2D* Union(const TGRegion2D&face) const;
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virtual void SubtractBy(const TGRegion2D&face,TGObjectList&res) const;
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//不能是自交曲线!!
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virtual void CutBy(const TPGeCurve2D&curve,TGObjectList&left,TGObjectList&right) const;
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//override TGObject2D
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virtual void SetElev(double elev);
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virtual double GetElev() const;
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//override TGObject
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virtual bool IsValid() const;
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virtual bool Intersect(const TGObject&obj,TGObjectList&oList) const;
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//GR_IN/GR_OUT/GR_EDGE/GR_HOLE
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virtual GRelation HitTest(const TGPoint&pt) const;
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//边界处为GR_IN;GR_HOLE|GR_EDGE表示洞边，GR_HOLE|GR_OUT表示洞内
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virtual bool IsInclude(const TGObject&obj) const;
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virtual void TransformBy(const TGMatrix&matrix);
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virtual bool GetExtend2D(TPGeExtend2D&ext) const;
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virtual bool Explode(TGObjectList&res) const;
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//attribute
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//是否有外边界
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bool IsOutlineExist() const;
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//取外边界(有外边界时)
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TPGeCurve2D& Outline() const;
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//取洞数
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long GetHoleNum() const;
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//是否有洞
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bool IsHoleExist() const;
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//洞可以是无限曲线
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TPGeCurve2D& Hole(long i) const;
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//是否封闭域
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bool IsClosed() const;
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//边界线之间是否有交集
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bool IsBoundaryInter() const;
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//边界线之间是否允许有交
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bool IsAllowBoundaryInter() const;
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//边界线是否可能有临界交集，用于内部布尔运算，注意：有洞的开放域总返回true!
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bool IsMayBoundaryInter() const;
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//是否整个平面，无洞也没外边界
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bool IsEntirePlane() const;
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//对于有界域
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double Area() const;
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//operate
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//调整封闭边界线，外边界是逆时针方向,内边界是顺时针方向
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void Normalize();
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//禁止TGObject3D
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void Clip(const TGObject&obj,TGObjectList&inList,TGObjectList&outList,TGObjectList&midList) const;
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void SubtractBy(const TGObjectList&oList,TGObjectList&res) const;
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//边界线性化,有洞时返回TGPolygonEx2D,无限域返回NULL
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TGPolygon2D* MLinearize(double paDist=0) const;
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//边界线Offset,偏移方法同TPGeCurve2D::Offset,如果有边界线无法Offset返回false
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//可能产生无效域!
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bool Offset(double offset);
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private:
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//由曲线集求平面域,最后曲线集将置空
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//如果可能有顺时针的环路，则应选择检查洞
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//曲线集中的每条曲线只能作为一个面域的边界,因此可能有多个环路时，关键曲线要排在前面,使关键曲线先被遍历!
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//曲线集中的曲线应两两之间无重合，无交叉(非端点交点)!
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//不支持开放域!
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void CreateRegion2D(TGObjectList&curves,TGObjectList&res,bool bCheckHole)const;
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//支持开放域，其余同上
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void CreateRegion2DEx(TGObjectList&curves,TGObjectList&res,bool bCheckHole)const;
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};
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#endif |