//-------------------------------------------------------------------------------------------------------+
// Copyright (C), 1998-2007, Beijing Tangent Software Co. Ltd.
// = FileName	:   TGMLine2D 类
// = Version	:   ver2.0
// = Author		:   wlw
// = CreateDate	:   2002-09-09
// = Description:   TGMLine2D 声明
// = Maintainers: 
//                  
//-------------------------------------------------------------------------------------------------------+
#ifndef _TGMLINE2D_H_
#define _TGMLINE2D_H_

#ifndef _TPGECURVE2D_H_
#include "TPGeCurve2D.h"
#endif

#ifndef _TPGELINE2D_H_
#include "TPGeLine2D.h"
#endif

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

#ifndef _TARRAY_H_
#include "TArray.h"
#endif

#ifndef _TTABLE_H_
#include "TTable.h"
#endif

#ifndef _TGOBJECT_H_
#include "TGObject.h"
#endif

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

#ifndef _TWFLAG_H_
#include "TWFlag.h"
#endif

#ifndef _TPGEARC2D_H_
#include "TPGeArc2D.h"
#endif

#ifndef _TPGEGLINERAY2D_H_
#include "TPGeGLineRay2D.h"
#endif

#ifndef _TPGECIRCLE2D_H_
#include "TPGeCircle2D.h"
#endif

class TGObject3D;
class TGMatrix;
class TPGeGLineSeg2D;

class GEOAPI TGMLine2D : public TPGeCurve2D
{
	DECLARE_RUN_TIME_CLASS(TGMLine2D)
public:
	//contruct
	TGMLine2D(long vertexNum = 0,bool bClosed = false);
	TGMLine2D(const TArray<TGPoint>&vertexs,bool bClosed = false);
	TGMLine2D(const TTable<TGPoint>&vertexs,bool bClosed = false);
	virtual ~TGMLine2D();

	TGMLine2D& operator = (const TArray<TGPoint>&vertexs);
	TGMLine2D& operator = (const TTable<TGPoint>&vertexs);
	TGPoint&  operator[](long i);

	virtual long Pa2Seg(double&pa) const;
	virtual void SetVertexNum(long num,bool bCopy = false);
	//消除相邻重合点,如使之有效返回true
	virtual bool RemoveDupPoint();
	virtual bool OffsetSeg(long i,double offset);
	
	//override TPGeCurve2D
	//参数区间为各段参数区间之和,即[0,GetSegNum()]
	virtual double Length() const;
	virtual void Pa2Pt(double pa,TGPoint&pt) const;
	virtual void Pt2Pa(const TGPoint&pt,double&pa) const;
	virtual void GetStartPoint(TGPoint&pt) const;
	virtual void GetEndPoint(TGPoint&pt) const;
	virtual void Reverse();
	virtual void GetTangent(double pa,TPGeLine2D&line) const;

	//对于!IS(CLOSE_CURVE),如果首尾结点相同，也将认为是自交!
	virtual bool IsSelfCross() const;
	virtual bool IsClosed() const;
	virtual bool Offset(double offset);

	virtual double Integration(double pa0,double pa1) const;
	virtual TGMLine2D* MLinearize(double paDist = 0) const;
	virtual TPGeCurve2D* GetSubCurve(double pa0,double pa1) const;
	virtual TGPoint GetSamplePoint() const;
	
	//override TGObject2D
	virtual void   SetElev(double elev);
	virtual double GetElev() const;
	
	//override TGObject
	//节点数大于1，无相邻重合点
	virtual bool IsValid() const;
	
	//分解为TPGeGLineSeg2D
	virtual bool Explode(TGObjectList&res) const;
	virtual void TransformBy(const TGMatrix& pMatrix);
	virtual TGObject * Clone() const;
	virtual GRelation HitTest(const TGPoint&pt) const;
	virtual bool IsInclude(const TGObject&obj) const;
	virtual bool GetExtend2D(TPGeExtend2D&ext) const;
	
	//edit
	void SetClosed(bool bClosed = true);

	//query
	//pa转化为本地参数
	bool IsLinear() const;
	bool IsConcave() const;
	long GetVertexNum() const;
	long GetSegNum() const;
	void GetSegment(long i,TPGeLine2D&seg) const;
	const TGPoint& GetVertex(long i) const;

	//operator
	//closed and not selfcross
	void QuickCut(const TPGeGLine2D&line,TGObjectList&left,TGObjectList&right,TGObjectList&mid) const;
	void QuickCut(const TPGeGLineRay2D&line,TGObjectList&left,TGObjectList&right,TGObjectList&mid) const;
	void QuickCut(const TPGeGLineSeg2D& seg,TGObjectList&left,TGObjectList&right,TGObjectList&mid) const;
	void QuickCut(const TPGeArc2D&arc,TGObjectList&left,TGObjectList&right) const;
	void QuickCut(const TPGeCircle2D&circle,TGObjectList&left,TGObjectList&right) const;
	//分解为不自交段,如不自交则返回false	
	bool ExplodeSelfcross(TGObjectList&oList) const;


protected:
	TArray<TGPoint> points;//节点
};

inline long TGMLine2D::GetSegNum() const
{
	if(GetVertexNum() < 2)
	{
		return 0;
	}
	else
	{
		return Is(CLOSED_CURVE) ? GetVertexNum() : GetVertexNum() - 1;
	}
}

inline void TGMLine2D::GetSegment(long i,TPGeLine2D&seg) const
{
	if(i < points.GetLastIndex())
	{
		seg.SetPoint(points.GetAt(i),points.GetAt(i + 1));
	}
	else
	{
		seg.SetPoint(points.GetAt(i),points.GetAt(0));
	}
}

#endif