//-----------------------------------------------------------------------------+
// Copyright (C), 1998-2007, Beijing Tangent Software Co. Ltd.
// = FileName	:   TGGe3DFace类
// = Version	:   ver2.0
// = Author		:   wlw
// = CreateDate	:   2002-09-09
// = Description:   TGGe3DFace类声明
// = Maintainers: 
//                  
//-----------------------------------------------------------------------------+
#ifndef _TGGE3DFACE_H_
#define _TGGE3DFACE_H_

#ifndef _TGGEENTITY_H_
#include "TGGeEntity.h"
#endif

#ifndef _TGGECURVESEGMENT_H_
#include "TGGeCurveSegment.h"
#endif

#ifndef _TDPTRLIST_H_
#include "TDPtrList.h"
#endif

#ifndef _TGGEPLANE_H_
#include "TGGePlane.h"
#endif

#ifndef _TADSGEPOINT3D_H_
#include "TADSGePoint3d.h"
#endif

#ifndef _TENTITYSET_H_
#include "TEntitySet.h"
#endif

class TGGe3DFace3Pt;

#define FLAG_UNNORMAL 0x10
#define FLAG_TRIANGLE 0x20 //此时0、3两点相等

class GEOAPI TGGe3DFace : public TGGeEntity
{
public:

	TGGe3DFace(int tag = 0);

    TGGe3DFace(TEntitySet &entFace, ads_matrix tranMat = NULL);
    
	TGGe3DFace(TGGe3DFace3Pt &face1, TGGe3DFace3Pt &face2);
    
	TGGe3DFace(const AcDbFace &face);
	
	TGGe3DFace(const TGGe3DFace &face);

	virtual ~TGGe3DFace();
	
	virtual bool IsKindOf(TEntityId entType) const;
	virtual TEntityId Type() const;
	virtual void CopyFrom(const TGGeEntity* pImpSrc);

    
	//如果是三角形，则移位使得首末点相同
	virtual TGGe3DFace & MakeBetter(); 
    
	virtual int IsLinear() const;
    
	virtual int IsPoint() const;
    
	virtual int IsRectangular(ads_real *x = NULL, ads_real *y = NULL) const;
	
	// nMethod: 0－采用标记来判断，1－采用首没点是否相同来判断，2－采用任意相邻2点相等来判断
	//          执行速度依次递减
	virtual BOOL IsTriangle(int nMethod) const;
	
	virtual BOOL IsVisible(int nSide) const;
	
	virtual void SetVisible(int nSide, BOOL bTrue);
	
    virtual int GetExtend(ads_point lowPt, ads_point upPt) const;
    
	virtual int Make(LPCTSTR lay = NULL) const;
	
    virtual int Modify(TEntitySet &entFace);
    
	virtual void TransformBy(ads_matrix mat);
    
	virtual void ExplodeEdge(TDPtrList<TGGeCurveSegment> &lstSegs) const;
    
	virtual void SetElevation(double nElev);
	
	virtual TVector3D GetNormal() const;
		
    virtual void Reverse();
	
	virtual int GetFlag()const;
	virtual void SetFlag(const int nFlag);
	
	virtual TADSGePoint3d& GetVertex(int nIndex);
	virtual TADSGePoint3d GetVertex(int nIndex)const;
	virtual void SetVertex(int nIndex, TADSGePoint3d pt);
	
    AcDbFace *AsDbFace() const;

	//0~3顶点向前/向后移位
	void MoveShift(BOOL bForward); 
	
    // 对3dface进行切割
    BOOL SectByPlane(const TGGePlane &plan, TDPtrList<TGGe3DFace> &upFaces, TDPtrList<TGGe3DFace> &downFaces) const;
	
	//vtLight都必须是单位向量！
	virtual TGGePoly3D GetPoly3D()const;
	
	TGGePlane GetPlane()const;
	
	int operator !() const;
	
	TGGe3DFace & operator= (const TGGe3DFace &face);
	
	TGGe3DFace & operator << (int nBit);
	
	TGGe3DFace & operator >> (int nBit);

	void SubSortVertex();
	BOOL SubSectByX(double xSect, TDPtrList<TGGe3DFace> &leftFaces, TDPtrList<TGGe3DFace> &rightFaces) const;
public:
	int m_nFlag;
	TADSGePoint3d m_ptVertex[4];
};


#endif