pftools::CaloEllipse Class Reference

#include <CaloEllipse.h>

List of all members.

Public Member Functions
void	addPoint (double x, double y)
	CaloEllipse ()
void	clearPoints ()
double	getEccentricity () const
Point	getMajorMinorAxes (double sigma=1.0) const
Point	getPosition () const
double	getTheta () const
void	makeCaches ()
void	reset ()
void	resetCaches ()
virtual	~CaloEllipse ()
Public Attributes
double	cachedEccentricity_
double	cachedMajor_
double	cachedMinor_
double	cachedTheta_
Private Attributes
std::vector< Point >	dataPoints_

---

Detailed Description

Definition at line 23 of file CaloEllipse.h.

---

Constructor & Destructor Documentation

CaloEllipse::CaloEllipse

(

)

Definition at line 15 of file CaloEllipse.cc.

                         {


}

CaloEllipse::~CaloEllipse

(

)

[virtual]

Definition at line 20 of file CaloEllipse.cc.

                          {

}

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Member Function Documentation

void pftools::CaloEllipse::addPoint	(	double	x,
		double	y
	)		[inline]

Definition at line 29 of file CaloEllipse.h.

References dataPoints_, and point.

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

void pftools::CaloEllipse::clearPoints

(

)

[inline]

Definition at line 34 of file CaloEllipse.h.

References dataPoints_.

                           {
                dataPoints_.clear();
        }

double CaloEllipse::getEccentricity

(

)

const

Definition at line 87 of file CaloEllipse.cc.

References a, b, getMajorMinorAxes(), AlCaHLTBitMon_ParallelJobs::p, and mathSSE::sqrt().

Referenced by pftools::operator<<().

                                          {
        Point p = getMajorMinorAxes();
        double a = p.first;
        double b = p.second;
        if(a == 0)
                return 0;
        double ecc = sqrt((a * a - b * b) / (a * a));
        return ecc;
}

Point CaloEllipse::getMajorMinorAxes

(

double

sigma = 1.0

)

const

Definition at line 48 of file CaloEllipse.cc.

References a, b, funct::cos(), dataPoints_, getPosition(), getTheta(), timingPdfMaker::mean, AlCaHLTBitMon_ParallelJobs::p, funct::sin(), mathSSE::sqrt(), theta(), and X.

Referenced by getEccentricity(), makeCaches(), and pftools::operator<<().

                                                       {

        if (dataPoints_.size() < 2) {
                return Point(0, 0);
        }

        Point mean = getPosition();

        PointCit it = dataPoints_.begin();
        double sum_xx(0.0);
        double sum_yy(0.0);
        double theta = getTheta();

        for (; it != dataPoints_.end(); ++it) {
                const Point& p = *it;
                double X = cos(theta) * (p.first - mean.first) - sin(theta) * (p.second
                                - mean.second);
                double Y = sin(theta) * (p.first - mean.first) + cos(theta) * (p.second
                                - mean.second);
                sum_xx += X * X;
                sum_yy += Y * Y;
        }

        double a = sigma * sqrt(sum_xx / dataPoints_.size());
        double b = sigma * sqrt(sum_yy / dataPoints_.size());

        double major, minor;

        if(a > b) {
                major = a;
                minor = b;
        } else {
                major = b;
                minor = a;
        }

        return Point(major, minor);
}

Point CaloEllipse::getPosition

(

)

const

Definition at line 97 of file CaloEllipse.cc.

References dataPoints_, and AlCaHLTBitMon_ParallelJobs::p.

Referenced by getMajorMinorAxes(), getTheta(), and pftools::operator<<().

                                     {

        if (dataPoints_.size() < 1) {
                return Point(0, 0);
        }

        double x_tot(0.0);
        double y_tot(0.0);
        PointCit it = dataPoints_.begin();
        for (; it != dataPoints_.end(); ++it) {
                const Point& p = *it;
                x_tot += p.first;
                y_tot += p.second;

        }

        return Point(x_tot / dataPoints_.size(), y_tot / dataPoints_.size());
}

double CaloEllipse::getTheta

(

)

const

Definition at line 23 of file CaloEllipse.cc.

References dataPoints_, getPosition(), timingPdfMaker::mean, AlCaHLTBitMon_ParallelJobs::p, lumiQueryAPI::q, and theta().

Referenced by getMajorMinorAxes(), makeCaches(), and pftools::operator<<().

                                   {
        if (dataPoints_.size() < 2) {
                return 0.0;
        }

        PointVector meanAdj;

        Point mean = getPosition();

        double sum_dxdx(0.0);
        double sum_dydy(0.0);
        double sum_dxdy(0.0);
        PointCit it = dataPoints_.begin();
        for (; it != dataPoints_.end(); ++it) {
                const Point& p = *it;
                Point q(p.first - mean.first, p.second - mean.second);
                meanAdj.push_back(q);
                sum_dxdx += q.first * q.first;
                sum_dydy += q.second * q.second;
                sum_dxdy += q.first * q.second;
        }
        double theta = 0.5 * atan(2.0 * sum_dxdy / (sum_dydy - sum_dxdx));
        return theta;
}

void CaloEllipse::makeCaches

(

)

Definition at line 123 of file CaloEllipse.cc.

References cachedMajor_, cachedMinor_, cachedTheta_, getMajorMinorAxes(), and getTheta().

Referenced by pftools::CandidateWrapper::recompute().

                             {
        cachedTheta_ = getTheta();
        Point axes = getMajorMinorAxes();
        cachedMajor_ = axes.first;
        cachedMinor_ = axes.second;
}

void CaloEllipse::reset

(

void

)

Definition at line 130 of file CaloEllipse.cc.

References dataPoints_, and resetCaches().

Referenced by pftools::CandidateWrapper::CandidateWrapper(), and pftools::CandidateWrapper::reset().

                        {
        dataPoints_.clear();
        resetCaches();
}

void CaloEllipse::resetCaches

(

)

Definition at line 116 of file CaloEllipse.cc.

References cachedMajor_, cachedMinor_, and cachedTheta_.

Referenced by reset().

                              {
        cachedTheta_ = 0.0;
        cachedMinor_ = 0.0;
        cachedMajor_ = 0.0;

}

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Member Data Documentation

double pftools::CaloEllipse::cachedEccentricity_

Definition at line 49 of file CaloEllipse.h.

double pftools::CaloEllipse::cachedMajor_

Definition at line 47 of file CaloEllipse.h.

Referenced by makeCaches(), and resetCaches().

double pftools::CaloEllipse::cachedMinor_

Definition at line 48 of file CaloEllipse.h.

Referenced by makeCaches(), and resetCaches().

double pftools::CaloEllipse::cachedTheta_

Definition at line 46 of file CaloEllipse.h.

Referenced by makeCaches(), and resetCaches().

std::vector<Point> pftools::CaloEllipse::dataPoints_ [private]

Definition at line 59 of file CaloEllipse.h.

Referenced by addPoint(), clearPoints(), getMajorMinorAxes(), getPosition(), getTheta(), and reset().