/data/refman/pasoursint/CMSSW_4_4_5_patch3/src/DataFormats/ParticleFlowReco/interface/CaloEllipse.h

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/*
 * CaloEllipse.h
 *
 *  Created on: 24-Mar-2009
 *      Author: jamie
 */

#ifndef CALOELLIPSE_H_
#define CALOELLIPSE_H_

#include <utility>
#include <vector>
#include <iostream>
#include <string>
#include <sstream>
namespace pftools {

typedef std::pair<double, double> Point;
typedef std::vector<Point> PointVector;
typedef PointVector::const_iterator PointCit;
typedef PointVector::iterator PointIt;

class CaloEllipse {
public:
        CaloEllipse();

        virtual ~CaloEllipse();

        void addPoint(double x, double y) {
                std::pair<double, double> point(x, y);
                dataPoints_.push_back(point);
        }

        void clearPoints() {
                dataPoints_.clear();
        }

        Point getPosition() const;

        Point getMajorMinorAxes(double sigma = 1.0) const;

        double getTheta() const;

        double getEccentricity() const;

        double cachedTheta_;
        double cachedMajor_;
        double cachedMinor_;
        double cachedEccentricity_;

        void makeCaches();

        void resetCaches();

        void reset();


private:
        std::vector<Point> dataPoints_;

};
        std::ostream& operator<<(std::ostream& s, const CaloEllipse& em);
}


#endif /* CALOELLIPSE_H_ */

#ifndef TOSTR_H
#define TOSTR_H
#include <sstream>
#include <iostream>
template <class T> std::string toString(const std::pair<T, T>& aT) {
        std::ostringstream oss;
        oss << "(" << aT.first << ", " << aT.second << ")";
        return oss.str();
}
#endif /*TOSTR_H */