//-----------------------------------------------------------------------------+
// Copyright (C), 1998-2007, Beijing Tangent Software Co. Ltd.
// = FileName	:   TBPloyLine.h
// = Version	:   ver2.0
// = Author		:   xlc
// = CreateDate	:   2002-09-09
// = Description:   类的声明,坐标为UCS
// = Maintainers: 
//                  
//-----------------------------------------------------------------------------+

#ifndef _TBPLOYLINE_H_
#define _TBPLOYLINE_H_

#ifndef _TBNODE_H_
#include "TBNode.h"
#endif

#ifndef _TGGEPOLYGONEX_H_
#include "TGGePolygonEx.h"
#endif

#ifndef _TGGEPOLY2D_H_
#include "TGGePoly2D.h"
#endif

#ifndef _TDNODE_H_
#include "TDNode.h"
#endif

class GEOAPI TBPloyLine : public CObject 
{
public:
	TBPloyLine();
	TBPloyLine(const TBPloyLine& bline);
	virtual ~TBPloyLine();
	
	//返回下一结点,如果pNode是最后节点,返回NULL.
	virtual TBNode* GetNextNode(const TBNode* pNode);
	//返回上一结点,如果pNode是头节点,返回NULL.
	virtual TBNode* GetPreNode(const TBNode* pNode); 

	//赋值操作
	TBPloyLine& operator = (const TBPloyLine& basLine); 
	//基线合并.只有当两基线首尾结点重合时才能合并（闭合的基线不能相加，相加后不检查闭合性）。
	TBPloyLine operator + (const TBPloyLine& basLine) const; 
	
	//与Create(AcDbObjectId&）区别:不考虑坐标的转换
	BOOL Create(const AcDbEntity* pEntity);
	BOOL Create(const TGGePoly2D& poly);
	BOOL Create(const TGGePolygonEx& poly);
	//ConstructBasLine根据objId构造基线链表,如果是圆或圆弧
	BOOL Create(AcDbObjectId& objId);		
	
	//将基线按每节段数nSegs近似等分,flag=1,等分直线,否则不等分直线
	void DivideBySegs(const int nSegs,BOOL flag = 1);
	//将基线中圆弧按角度detaAng近似等分
	void DivideByAng(const double detaAng);
	
	//按每段段数直线段化基线  
	void LinearizePLine(int nSegs);
	//按角度直线段化基线
	void LinearizePLine(double dAng);
	
	//返回基线总长度              
	double GetLength(BOOL bReCalSCoord = 0) const;
	
	//返回基线上最大X值,最小X值
	double	GetMaxX();
	double	GetMinX();                                  
	double	GetMinY();
	double	GetMaxY();
	
	//返回s坐标处的TDNode,totalLength>=s>=0;bCalZ=1,计算Z值
	BOOL GetDNode(double s,TDNode* pDivNode); 
	
	//返回基线链表头结点 
	TBNode* Head();
	//返回基线链表尾结点                                    
	TBNode* Tail();
	
	//得到最左边的结点
	TBNode* GetMostLeftNode();      
	
	//返回S±deta范围内的结点，bPercent=1，则deta为百分比
	TBNode* GetNodeRangedAt(double ds,double deta,BOOL bPercent = 0);
	
	//返回圆弧始点切线与X轴夹角
	double GetActAngOfArcIn(TBNode* pNode);
	//返回圆弧终点切线与X轴夹角
	double GetActAngOfArcOut(TBNode* pNode);    
	
	//1：顺时针，2：逆时针，0：无法判断--注意：需要先直线段化
	BOOL GetClockwise(); 
	
	//在结点pNode处插入一条基线，LinkEdgeUnvisible=1：基线的最后一点与pNode连线不可见
	BOOL InsertBLineInto(TBNode* pNode,TBPloyLine* pBLine,BOOL LinkEdgeUnvisible = 1); 
	
	//测试基线是否封闭
	BOOL IsClosed() const; 
	
	//判断是否有圆弧存在                                          
	BOOL HasArc() const;
	
	//判断是否为园                                                    
	BOOL isCircle() const;
	
	//判断基线是否在XY平面内                                                  
	BOOL IsInXYPlane() const;
	
	//判断pt是否在闭合基线内部,1：内部，0：外部，2：边界上                                  
	BOOL IsPtInPolygon(AcGePoint3d& pt) const; 
	
	//基线是否与LINE线段相交,只与小于X的线段作比较,假设基线全为直线段                    
	BOOL IsIntersectWith(double x,AcGePoint3d pt1,AcGePoint3d pt2) const;
	
	//测试是否为空 
	BOOL IsEmpty() const;
	
	//重新计算首尾点距离，看是否封闭，封闭返回1                     
	BOOL CheckClose(); 
	
	//返回1：pBLine在此区域内部，2：外部，3：相交      
	int  IsWhere(TBPloyLine* pBLine);
	
	//基线反向操作                                         
	TBPloyLine& Reverse();
	
	//整理基线，将重合点、同一直线或圆弧上的多余点删除                                                    
	void ClearUp(double tol = TOL); 
	
	//将共线的圆弧段合并                                             
	void MergeCoArc(double tol = TOL);

	//将共线的直线段合并                                         
	void MergeCoLine(double tol = TOL); 
	
	//删除重合结点
	void RmvOverlapPt(double tol = TOL); 
	
	//重新计算S坐标                               
	void ReCalcSValue(); 
	
	//将pHead设置基线的头，只对封闭曲线                                   
	void ResetHead(TBNode* pHead);
	
	//平移基线                                 
	void MoveTo(AcGeVector3d& disp);
	
	//释放并清空等分点链表                                        
	void ReleaseDivLst(); 
	//清空基线链表                                                 
	void ReleaseBasLst();       
	//清空基线和等分链表，m_bClosed=0                                               
	void ReleaseAll();                                                     
	
public:
	//是否封闭
	BOOL m_bClosed;	
	//基线基础链表，调用ConstructBasLine构造
	TBNodeList m_BNodeList;
	//基线等分点链表,调用CostructDivLst构造，用ReleaseDivLst清空
	TDNodeList m_DNodeList; 
	
private:
	//判断ECS与UCS的Z轴是否平行1：同向平行，2：反向平行；0：不平行
	int  IsZParalECSAndUcs(AcDbObjectId& objId);
	//将点从WCS转换到UCS,bVer = 1:转换矢量
	void WCS2UCS(AcGePoint3d& pt,BOOL bVer = 0);
	void WCS2ECS(AcGePoint3d& pt,AcDbObjectId& objId,BOOL bVer = 0);
	//将点从ECS转换到UCS,bVer = 1:转换矢量
	void ECS2UCS(AcGePoint3d& pt,AcDbObjectId& objId,BOOL bVer = 0);
	//与acutPolar()功能相同
	AcGePoint3d polar(AcGePoint3d& pt0,double ang,double dist);
	//x1\x2是否同号
	BOOL IsEqualSign(double x1,double x2); 
};

#endif