Thrust.hh

// -*- C++ -*-
#ifndef RIVET_Thrust_HH
#define RIVET_Thrust_HH
 
#include "Rivet/Projection.hh"
#include "Rivet/Projections/AxesDefinition.hh"
#include "Rivet/Projections/FinalState.hh"
#include "Rivet/Event.hh"
 
namespace Rivet {
 
 
  class Thrust : public AxesDefinition {
  public:
 
    using AxesDefinition::operator=;
 
    Thrust() {}
 
    Thrust(const FinalState& fsp) {
      setName("Thrust");
      declare(fsp, "FS");
    }
 
    RIVET_DEFAULT_PROJ_CLONE(Thrust);
 
    using Projection::operator =;
 
 
  protected:
 
    void project(const Event& e) {
      const vector<Particle> ps
        = apply<FinalState>(e, "FS").particles();
      calc(ps);
    }
 
    CmpState compare(const Projection& p) const {
      return mkNamedPCmp(p, "FS");
    }
 
 
  public:
 
    double thrust() const { return _thrusts[0]; }
    double thrustMajor() const { return _thrusts[1]; }
    double thrustMinor() const { return _thrusts[2]; }
    double oblateness() const { return _thrusts[1] - _thrusts[2]; }
 
    const Vector3& thrustAxis() const { return _thrustAxes[0]; }
    const Vector3& thrustMajorAxis() const { return _thrustAxes[1]; }
    const Vector3& thrustMinorAxis() const { return _thrustAxes[2]; }
 
    const Vector3& axis1() const { return thrustAxis(); }
    const Vector3& axis2() const { return thrustMajorAxis(); }
    const Vector3& axis3() const { return thrustMinorAxis(); }
 
 
  public:
 
 
    void calc(const FinalState& fs);
 
    void calc(const vector<Particle>& fsparticles);
 
    void calc(const vector<FourMomentum>& fsmomenta);
 
    void calc(const vector<Vector3>& threeMomenta);
 
 
 
  protected:
 
    vector<double> _thrusts;
 
    vector<Vector3> _thrustAxes;
 
 
  protected:
 
    void _calcThrust(const vector<Vector3>& fsmomenta);
 
  };
 
}
 
#endif