public bool Move()
{
int @event;
var isFoodInFront = Observe(out @event);
var transition = Ant.Transitions[_currentState, @event];
if (transition.EndState >= 0 && transition.EndState < Ant.StatesNumber)
{
var action = (ArtificialAnt.AntActions)transition.Output;
_currentState = transition.EndState;
switch (action)
{
case ArtificialAnt.AntActions.Left:
CurrentDirection = GetLeftDirection(CurrentDirection);
break;
case ArtificialAnt.AntActions.Right:
CurrentDirection = GetRightDirection(CurrentDirection);
break;
case ArtificialAnt.AntActions.Move:
CurrentCell = CurrentCell.Next(CurrentDirection, _currentField.FieldWidth, _currentField.FieldHeight);
CurrentField[CurrentCell.X, CurrentCell.Y] = false;
break;
}
return(isFoodInFront && (action == ArtificialAnt.AntActions.Move));
}
throw new Exception(String.Format("ends fail: {0}", transition.EndState));
}
private bool Observe(out int @event)
{
var nextCell = CurrentCell.Next(CurrentDirection, _currentField.FieldWidth, _currentField.FieldHeight);
var isFoodInFront = CurrentField[nextCell.X, nextCell.Y];
@event = 0;
if (ViewRadius == 1)
{
@event = isFoodInFront ? 1 : 0;
}
else
{
var left = GetLeftDirection(CurrentDirection);
var right = GetRightDirection(CurrentDirection);
nextCell = CurrentCell;
for (int i = 0; i < ViewRadius - 1; i++)
{
nextCell = nextCell.Next(left, _currentField.FieldWidth, _currentField.FieldHeight);
}
Cell startCell = nextCell;
int currCollLength = ViewRadius * 2 - 1;
int cellsElapsed = 0;
for (int i = 0; i < ObservableCells; i++)
{
if (nextCell.X == CurrentCell.X && nextCell.Y == CurrentCell.Y)
{
nextCell = nextCell.Next(right, _currentField.FieldWidth, _currentField.FieldHeight);
cellsElapsed++;
}
@event |= _currentField[nextCell.X, nextCell.Y] ? 1 << i : 0;
cellsElapsed++;
if (cellsElapsed >= currCollLength)
{
cellsElapsed = 0;
currCollLength -= 2;
startCell = startCell.Next(right, _currentField.FieldWidth, _currentField.FieldHeight).Next(CurrentDirection, _currentField.FieldWidth, _currentField.FieldHeight);
nextCell = startCell;
}
else
{
nextCell = nextCell.Next(right, _currentField.FieldWidth, _currentField.FieldHeight);
}
}
}
return(isFoodInFront);
}