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TowerId.h

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#ifndef GLAST_TOWERID_H
#define GLAST_TOWERID_H 1

namespace idents {

class TowerId
{
  public:

      enum {xNum=4, yNum=4}; // not likely to change again

      TowerId (unsigned int id = 0):m_id(id){}

      TowerId (unsigned int ix, unsigned int iy):m_id(ix+xNum*iy){}

      int id () const {return m_id; }

      int ix () const {return (m_id % xNum);}

      int iy () const {return (m_id / xNum);}

      bool neighbor (const TowerId& n){
          int dx = ix()-n.ix(), dy=iy()-n.iy();
          return dx<2 && dx>-2 && dy<2 && dy>-2; 
      }

      /* dereference operator -- replace with explicit method above
      operator unsigned int () const { return m_id; }
      */

private:
      unsigned int m_id;
};

} //namespace idents

#endif

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