#pragma once
#include "GeEntity.h"
#include "ADSGePoint3d.h"
#include "GeLine.h"

class GePlane : public GeEntity
{
public:
    
	GePlane();

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

    GePlane(const ADSGePoint3d &ptOrg, const TVector3D &vtNorm);
    
	GePlane(const GePlane &src);
	
	virtual ~GePlane();

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

    // 3点确定一平面方程
    virtual BOOL SetFrom3p(const ADSGePoint3d &pt1, const ADSGePoint3d &pt2, const ADSGePoint3d &pt3);

    // 平面与线求交，考虑了线是否为无限长
    virtual BOOL Intersect(const GeLine &ln, ADSGePoint3d &ptInt) const;

    // 平面与平面求交，求交线（无限长）
    virtual BOOL Intersect(const GePlane &plan, GeLine &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);

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

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