/* University College London Dept of Physics Course in C++ 3C59 
| all rights reserved 2000
|
| Utility: The Photon class
|
|   This is an unbelieveably trival class used to represent a photon in
|   the Compton experiment monte-carlo programme used as a consolidation
|   excercise
|
|   It is so trivial I havnt even written a .cpp file and ive also 
|   putmin some of the const qualifiers.
|
| Author: P.Clarke 
*/
#ifndef __photon_h__
#define __photon_h__ 1

#define M_PI 3.14159 

class Photon {

private:

  float m_energy ; // Photon energy
  float m_angle ;  // Photon angle in degrees

public:

  // Constructor:  takes angle in degrees
  Photon( float energy, float angle )
  {
    m_energy = energy;
    m_angle  = angle;
  }

  // Default constructor
  Photon( )
  {
    m_energy = 0.;
    m_angle  = 0.;
  }

 
  // Query properties
  float angle( )        const { return m_angle ;}
  float angleRadians( ) const { return (m_angle * M_PI / 180.0) ; } // M_PI defined in cmath
  float energy()        const { return m_energy ;}

};

#endif