//////////////////////////////////////////////////////////////////////////////
//文件: SegY文件操作类
//主要功能: 
//			实现坐标与线道号之间的相互转换
//程序编写:		2011-4-1
//
//
/////////////////////////////////////////////////////////////////////////////

#pragma once
#include "RowCol.h"
#include "TInterval.h"

namespace NCube
{

//实现坐标与线道号之间的相互转换
class AFX_EXT_CLASS CCoorTransform
{
public:
	CCoorTransform(void);
	~CCoorTransform(void);

	//带有x、y的为坐标，带有m、n的为线道号
	bool Create( double x1, double y1, double m1, double n1, 
				 double ddx, double ddy, double angle );
	//根据对应二点生成平面(二点校位)
	bool Create(
		double x1, double y1, double m1, double n1,
		double x2, double y2, double m2, double n2 );

	//根据对应三点生成平面(三点校位)
	bool Create(
		double x1, double y1, double m1, double n1,
		double x2, double y2, double m2, double n2,
		double x3, double y3, double m3, double n3 );

	////////////////////////////////////////////////////////////////
	//三点				max inline
	//		2---------------------------
	//		|							|
	//		|							|  max
	//		|							|crossline
	//		|							|
	//		|							|
	//		1---------------------------3
	/////////////////////////////////////////////////////////////////
	//!< 设置变换需要的三个对应坐标点. 注意第三点线号与第一点线号相同
	//!< c0、c1、c2为实际坐标点，对应的线道号坐标为rc0、rc1、rc2(rc0.row,col2)
	bool set3Points(
		const CPoint2D& c0, const CPoint2D& c1, const CPoint2D& c2,
		const CRowCol& rc0, const CRowCol& rc1, int col2 );

	//!< 线道号转换为坐标
	void	 toXY(const CRowCol& rc, CPoint2D& pt);
	void	 toXY(int row, int col, double&x, double& y);
	void	 toXY(double row, double col, double&x, double& y);
	CPoint2D toXY(const CRowCol& rc);
	CPoint2D toXY(int row, int col);
	CPoint2D toXY(double row, double col);

	//!< 坐标转换为线道号
	void     toRC(const CPoint2D& pt, CRowCol& rc);
	void     toRC(double x, double y, int& row, int& col);
	CRowCol	 toRC(const CPoint2D& pt);
	CRowCol  toRC(double x, double y);

	//!< 将线道号转换为坐标
	CRowCol	TransformBack(const CPoint2D& coord,
		const TIntervalStep<int>* inlrg=0,
		const TIntervalStep<int>* crlrg=0 ) const;
	/*!< Transforms Coord to RowCol. If the ranges are
	given, they are only used for snapping: the	actual range is not used */

	CPoint2D TransformBackNoSnap(const CPoint2D& coord) const;
	/*!< transforms back, but does not snap. The row is stored in the x-component, and the
	col is stored in the y-component. */

	//输出测网
	void	WriteLine(LPCTSTR lpszFileName, TIntervalStep<int> row, TIntervalStep<int> col);

	void	Write(CFile& fw);
	int 	Read(CFile& fr);
	void	Serialize(CArchive& ar, const short &ver);

protected:
	//!<Sets up the transform using three points. note that the third point is
	//assumed to be on the same row as the first point.
	struct RCTransform
	{
		RCTransform()	{ a = b = c = 0; }

		inline double det( const RCTransform& bct ) const
		{
			return b * bct.c - bct.b * c;
		}
		inline bool	valid( const RCTransform& bct ) const
		{
			double d = det( bct );
			return !mIsZero(d, 1e-10);
		}

		double		a, b, c;
	};

public:
	void	setTransforms( const RCTransform& x,const RCTransform& y )	{ xtr = x; ytr = y; }
	const RCTransform&	getTransform( bool x ) const { return x ? xtr : ytr; }

protected:
	RCTransform		xtr;
	RCTransform		ytr;

public:
	//形成变换的对应三点
	CPoint2D m_pt[3];
	CRowCol  m_rc[3];
};

}//namespace