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

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

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

#ifndef _TGGELINE_H_
#include "TGGeLine.h"
#endif

class GEOAPI TGGePlane : public TGGeEntity
{
public:
    
	TGGePlane();

    TGGePlane(double aa, double bb, double cc, double dd);

    TGGePlane(const TADSGePoint3d &ptOrg, const TVector3D &vtNorm);
    
	TGGePlane(const TGGePlane &src);
	
	virtual ~TGGePlane();

	virtual bool IsKindOf(TEntityId entType) const;
	virtual TEntityId Type() const;
	virtual void CopyFrom(const TGGeEntity* pImpSrc);
	
    virtual BOOL IsValid() const;

    // 3点确定一平面方程
    virtual BOOL SetFrom3p(const TADSGePoint3d &pt1, const TADSGePoint3d &pt2, const TADSGePoint3d &pt3);

    // 平面与线求交，考虑了线是否为无限长
    virtual BOOL Intersect(const TGGeLine &ln, TADSGePoint3d &ptInt) const;

    // 平面与平面求交，求交线（无限长）
    virtual BOOL Intersect(const TGGePlane &plan, TGGeLine &ln) const;

    virtual TVector3D GetNormal() const;

   	virtual double GetAngle(TVector3D vtLight)const;

	virtual bool IsReflect(TVector3D vtLight)const;

	virtual bool Reflect(TVector3D vtLight,TVector3D& vtRes)const;
	
	virtual double GetParaA()const;
	virtual void SetParaA(const double dVal);
	
	virtual double GetParaB()const;
	virtual void SetParaB(const double dVal);
	
	virtual double GetParaC()const;
	virtual void SetParaC(const double dVal);
	
	virtual double GetParaD()const;
	virtual	void SetParaD(const double dVal);

    TGGePlane & operator = (const TGGePlane &src);
	
    BOOL operator !() const;
	
public:
	
    double m_dParaA, m_dParaB, m_dParaC, m_dParaD;
};

extern GEOAPI BOOL GetShadowMatrix(const TGGePlane&plane, const TVector3D &vtLight, AcGeMatrix3d &mShadowMatrix);

#endif