//-------------------------------------------------------------------------------------------------------+
// Copyright (C), 1998-2007, Beijing Tangent Software Co. Ltd.
// = FileName	:   TPGePlane Àà
// = Version	:   ver2.0
// = Author		:   wlw
// = CreateDate	:   2002-09-09
// = Description:   TPGePlane ÉùÃ÷ ·½³Ì£ºa*x+b*y+c*z+d=0;TGVector3D=(a,b,c)
// = Maintainers: 
//                  
//-------------------------------------------------------------------------------------------------------+
#ifndef _TPGEPLANE_H_
#define _TPGEPLANE_H_

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

#ifndef _TGVECTOR3D_H_
#include "TGVector3D.h"
#endif

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

#ifndef _TPGELINE3D_H_
#include "TPGeLine3D.h"
#endif

class TGMatrix;

class GEOAPI TPGePlane : public TGVector3D
{
public:
	
	TPGePlane();
	
	TPGePlane(const TPGePlane& plane);
	
	TPGePlane(const TGVector3D& vt,const TGPoint& pt);

	virtual ~TPGePlane();

	TPGePlane& operator =(const TPGePlane& plane);
	
	bool IsValid() const;
	
	bool Normalize();
	
	void SetNormal(const TGPoint& vt);
	
	void SetBasePoint(const TGPoint& pt);

	void TransformBy(const TGMatrix* pMat);
	
	TGPoint GetSamplePoint() const;

	GRelation HitTest(const TGPoint& pt,bool bNormalized = false) const;
	
	int Intersect(const TPGeLine3D& line,double& pa,bool bNormalized = false) const;
	
	int Intersect(const TPGeLine3D& line,TGPoint& pt,bool bNormalized = false) const;
	
	int Intersect(const TPGePlane& plane,TPGeLine3D& line,bool bNormalized = false) const;	
	
	bool IsSamePlane(const TPGePlane& plane,bool bSameDirection,bool bNormalized = false) const;
	
public:

	double &a,&b,&c,d;

private:

	int LinePlaneInt3DPt(double A,double B,double C,double D,const TGPoint&pt0,const TGVector3D&vt,TGPoint&pt) const;
	
	int LinePlaneInt3D(double A,double B,double C,double D,const TGPoint&pt0,const TGVector3D&vt,double&pa) const;
	
	int PlaneInt(double A1,double B1,double C1,double D1,double A2,double B2,
				 double C2,double D2,TGPoint&pt,TGVector3D&vt) const;

};

#endif