/*
 * PndFtsLineApproximator.h
 *
 *  Created on: Jun 2, 2016
 *      Author: kibellus
 */
#include <vector>
#include "PndLine.h"
#include "TMatrix.h"
#include "TMath.h"
#include "PndTrackCand.h"
#include "PndFtsHit.h"
#include "PndFtsExpandedTrackCand.h"
//#include "PndLineApproximation.h"
#include "PndFtsLineComparator.h"
#include "Tuple.h"

using namespace std;

#ifndef PNDTOOLS_PNDFORWARDTRACKFINDER_PNDFTSLINEAPPROXIMATOR_H_
#define PNDTOOLS_PNDFORWARDTRACKFINDER_PNDFTSLINEAPPROXIMATOR_H_

/*
* This class can be used to create line approximations with the isochrones of a track candidate.
* You shold use the extern method createExpandedTrackCand to create the track candidates.
* Look at the method documentation of createExpandedTrackCand to find out which results you will 
* get for different cases of hits in the track candidate.
*/
class PndFtsLineApproximator {
public:
	static Double_t compDist; //distance limit for the comparator
	static Double_t compAngle; //angle limit for the comparator
	PndFtsLineApproximator() : fComparator(compDist,compAngle){}
	virtual ~PndFtsLineApproximator();
	//creates line approximations
	PndFtsExpandedTrackCand createExpandedTrackCand(PndTrackCand &cand);
private:
	//methods to create the lines
	vector<PndLineApproximation> approxLines(PndFtsHit* h1 ,PndFtsHit* h2);
	vector<PndLineApproximation> approxInnerLine(PndFtsHit* h1 ,PndFtsHit* h2);
	vector<PndLineApproximation> approxOuterLine(PndFtsHit* h1 ,PndFtsHit* h2);
	//adds a line to a collection of lines
	void addLine(vector<vector<PndLineApproximation>> &lines, PndLineApproximation &l);
	//PndLineApproximation createLine(vector<PndLineApproximation> lines);

	//mehtods which are used for a coordinate transformation
	PndFtsHit* copyHitWithNewPosition(PndFtsHit *h, Double_t x, Double_t z);
	void transform(Bool_t transToNewSystem, PndFtsHit* hit);
	TMatrix getRotationMatrix(Double_t angle);

	//used to compare lines (find out whether they are similar)
	PndFtsLineComparator fComparator; 
};

#endif /* PNDTOOLS_PNDFORWARDTRACKFINDER_PNDFTSLINEAPPROXIMATOR_H_ */