//-------------------------------------------------------------------------------------------------------+
// Copyright (C), 1998-2007, Beijing Tangent Software Co. Ltd.
// = FileName	:   TPGeLine3D 类
// = Version	:   ver2.0
// = Author		:   wlw
// = CreateDate	:   2002-09-09
// = Description:   TPGeLine3D 声明 方程：x=basePoint.x+a*t;y=basePoint.y+b*t;z=basePoint.z+c*t;TGVector3D=(a,b,c)
// = Maintainers: 
//                  
//-------------------------------------------------------------------------------------------------------+
#ifndef _TPGELINE3D_H_
#define _TPGELINE3D_H_

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

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

#ifndef _TPGECIRCLE_H_
#include "TPGeCircle.h"
#endif

class TGMatrix;

class GEOAPI TPGeLine3D : public TGVector3D
{
public:
	
	TPGeLine3D();
	
	TPGeLine3D(const TPGeLine3D& line);

	TPGeLine3D(const TGVector3D& vt,const TGPoint& pt);
	
	TPGeLine3D(const TGPoint& pt0,const TGPoint& pt1);

	virtual ~TPGeLine3D();

	
	TPGeLine3D& operator = (const TPGeLine3D& line);

	bool IsValid() const;

	void Pt2Pa(const TGPoint& pt,double& pa) const;
	
	void Pa2Pt(double pa,TGPoint& pt) const;

	void TransformBy(const TGMatrix* pMatrix);

	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,double& pa1,double& pa2,bool bNormalized = false) const;
	
	int Intersect(const TPGeLine3D& line,TGPoint& pt,bool bNormalized = false) const;

	bool IsInSamePlane(const TPGeLine3D& line) const;
	
	bool IsSameLine(const TPGeLine3D& line,bool bSameDirection,bool bNormalized = false) const;

public:
	
	double &a,&b,&c;
	
	TGPoint basePoint;
	
private:
	
	int LineInt3D(const TGPoint &pt1,const TGVector3D &vt1, const TGPoint &pt2,const TGVector3D &vt2, double &pa1)const;
};

#endif