//-----------------------------------------------------------------------------+
// Copyright (C), 1998-2007, SH Software Co. Ltd.
// = FileName	:   XPolygonEx类
// = Version	:   ver2.0
// = Author		:   zjq
// = CreateDate	:   2002-09-09
// = Description:   XPolygonEx类声明
// = Maintainers: 
//                  
//-----------------------------------------------------------------------------+
#ifndef _XPOLYGONEX_H_
#define _XPOLYGONEX_H_

#ifndef _XPOLY_H_
#include "XPoly.h"
#endif

#ifndef _ENTITY_H_
#include "Entity.h"
#endif

#ifndef _XTRIANGLE_H_
#include "XTriangle.h"
#endif

#ifndef _LoopList_H_
#include "LoopList.h"
#endif


// 多边形的三角形化
class GEOAPI XPolygonEx : public XPoly 
{
public:
	XPolygonEx();
	XPolygonEx(XPoly &src);
	XPolygonEx(Entity &ent);
	XPolygonEx(const XPolygonEx &src);
	virtual ~XPolygonEx();

	virtual bool IsKindOf(TEntityId entType) const;
	virtual TEntityId Type() const;
	virtual void CopyFrom(const XEntity* pSrc);
	
	XPoint * operator [](int nIndex);
	const XPoint & operator [](int nIndex) const;
	XPolygonEx & operator = (const XPolygonEx &src);
		
    // 求法向量，用来作为坐标变换
    int GetNormal(XVector3D &vtNormal) const;

	int Make(const TCHAR *szLay);

	// b2D--TRUE, 已经是二维；否则是三维，需要坐标变换
    int Trianglize(DList<XTriangle> &lstTris, BOOL b2D = FALSE) const;
	int SubTrianglize(DList<XTriangle> &lstTris);

	int GetInsidePoint(XPoint &ptRet, BOOL b2D = FALSE) const;
	int SubGetInsidePoint(XPoint &ptRet);

	//是否为凸多边形，2D
	BOOL IsConvex() const; 
	BOOL IsVisible(int idx) const;
	
	void Reset();
	void Reverse();
	void Ecs2Wcs(XVector3D vtEcs);
	void Wcs2Ecs(XVector3D vtEcs);
  
	void SetVisible(int idx, BOOL bVis);
	
	void RemoveNode(int nIndex);
	void AppendNode(const XPoint &pt, int nIndex = 1);

	double GetEdgeLength(int idx) const;
	double GetAngle(int idx) const;
	XPoint GetVertex(int idx) const;
	LoopList<int>& GetVisibleFlag();
	
public:
	// 1--visible; 0-invisible  
	LoopList<int> m_lstVisibleFlag; 
};

#endif