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C:/temp/src/j2k/QNX4/Train/Track.hpp

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#ifndef __J2K__Train__Track_HPP__
#define __J2K__Train__Track_HPP__

#include <j2k/Fred/Basic.hpp>
#include <j2k/Fred/Boolean.hpp>
#include <j2k/Fred/StdTypes.hpp>
#include <j2k/Fred/QNX/System.hpp>

#include <j2k/Fred/QNX/Train/Segment.hpp>
#include <j2k/Fred/QNX/Train/Switch.hpp>

#define  NSEG    16    // * This is the number of segments
#define  NSW     4     // * This is the number of switches

#define  OPEN    1     // * This is the switch position
#define  CLOSE   0     //

/*
                          . - - - - - .
                        /               \
            . - - - - -*- - - - - - - - -*- - - - - .
          /           [1]               [2]            \
        /                                               \
      /                                                   \
     |                                                     |
     |                                                     |
     |                                                     |
     |                                                     |
      \                                                   /
        \                                               /
          \           [4]               [3]           /
            . - - - - -*- - - - - - - - -*- - - - - .
                       \               /
                         . - - - - - .

*/

class Track
{
public:
  Track();                          // * Track initialisation
  virtual ~Track();                 // * Track destruction
    
  void testSwitches();              // * Test the switch operations
  int  isSegmentOccupied(int seg);  // * Querry a zone to see if occupied
  void setSwitch(int s, int p);     // * Set switch (S) position (P)
  void showGeometry();              // * DEBUG!!!!

  int  getNext( int s );
  int  getPrev( int s );

private:
  Segment segment[ NSEG ];
  Switch  switch[  NSW  ];

  void initSegments();
  void initSwitches();
  void initGeometry();

  // * Update the Track according to the switch position
  void updateTrack(int ID, int P); 
};

#endif

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