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C:/temp/src/j2k/QNX4/Train/Railway.cpp

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#ifndef __J2K__Train__Railway_CPP__
#define __J2K__Train__Railway_CPP__

void Railway::initTrains()
{
  train[0].setTrainID(1);
  train[1].setTrainID(2);
  train[3].setTrainID(4);
}

void Railway::showCurrentGeometry()
{
  track.showGeometry();
}

void Railway::setTrainVelocity( int ID, int V )
{
  // Update the velocity
  train[ID-1].setVelocity(V);
}

//  This is the position tracker
int Railway::getTrainPosition( int ID )
{
  int trainPosition;

  printf("the position of train is %d\n", train[ID-1].getPosition() );
  trainPosition = train[ID-1].getPosition();

  if ( train[ID-1].getDirection() == CW ) {
    while(
      track.isSegmentOccupied( track.getNext(trainPosition) ) != TRUE
    ) {
     //printf("The position of train is %d\n", train[ID-1].getPosition());
    };

    train[ID-1].setPosition( track.getNext(trainPosition) );

  } else {

    while(
      track.isSegmentOccupied( track.getPrev(trainPosition) ) != TRUE
    ) {
      //printf("The position of train is %d\n", train[ID-1].getPosition());
    };

    train[ID-1].setPosition( track.getPrev(trainPosition) );
  }

  return train[ID-1].getPosition();
}

Railway::Railway()
{
  initTrains();

  // For now comment the next line
  autoPositionTrains();

  // REMEMBER TO REMOVE THE FOLLOEING LINES
  //--------------------------
  // train[0].setPosition(1);
  // train[1].setPosition(8);
  // train[3].setPosition(9);
  //--------------------------
}

void Railway::displaySegmentsOccupied()
{
  for( int i = 0; i < NSEG; i++ ) {
    if ( track.isSegmentOccupied(i+1) == TRUE )
      printf("%2d ",i+1);
    }
  }

  printf("\n");
}

void Railway::autoPositionTrains()
{
  int SegBefore[ NSEG ];
  int SegAfter[  NSEG ];
  int i;

  displaySegmentsOccupied();

  // AutoPostion for Train 1
  // "Before" track segment state
  for( i = 0; i < NSEG; i++ ) {
    SegBefore[i] = track.isSegmentOccupied(i+1);
  }

  train[0].setVelocity( 12 );
  delay( 250 );
  train[0].setVelocity( 0 );

  // "After" track segment state
  for( i = 0; i < NSEG; i++ ) {
    SegAfter[i] = track.isSegmentOccupied(i+1);
  }

  // Compare the arrays
  for( i = 0; i < NSEG; i++ ) {
    if ( SegAfter[i]==1 && SegBefore[i]==0 ) {
      train[0].setPosition(i+1);
      break;
    }
  }

  displaySegmentsOccupied();

  // AutoPostion for Train 2
  // "Before" track segment state
  for( i = 0; i < NSEG; i++ ) {
    SegBefore[i] = track.isSegmentOccupied(i+1);
  }

  train[1].setVelocity(12);

  delay(1000);
  train[1].setVelocity(0);

  // "After" track segment state
  for( i = 0; i < NSEG; i++ ) {
    SegAfter[i] = track.isSegmentOccupied(i+1);
  }

  // Compare the arrays
  for( i = 0; i < NSEG; i++ ) {
    if ( SegAfter[i]==1 && SegBefore[i]==0 ) {
      train[1].setPosition(i+1);
      break;
    }
  }

  displaySegmentsOccupied();

  // AutoPostion for Train 4
  // "Before" track segment state
  for( i = 0; i < NSEG; i++ ) {
    SegBefore[i] = track.isSegmentOccupied(i+1);
  }

  train[3].setVelocity( 12 );
  delay( 250 );
  train[3].setVelocity( 0 );

  // "After" track segment state
  for( i = 0; i < NSEG; i++ ) {
    SegAfter[i] = track.isSegmentOccupied(i+1);
  }

  // Compare the arrays
  for( i = 0; i < NSEG; i++ ) {
    if (SegAfter[i]==1 && SegBefore[i]==0) {
      train[3].setPosition(i+1);
      break;
    }
  }

  displaySegmentsOccupied();

  printf("\n\n\n-------------------------------------------\n");
  printf("The System is Ready To Run..........\n");
  printf("Train 1 position:    %d\n", train[0].getPosition() );
  printf("Train 2 position:    %d\n", train[1].getPosition() );
  printf("Train 4 position:    %d\n", train[3].getPosition() );
}

void Railway::switchTrack( int ID, int P )
{
  track.setSwitch( ID, P );
}

#endif

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