public override bool TryMove(Field <IAnimal> field, out Vector nextMove)
{
nextMove = new Vector(0, 0);
if (!TryDecreaseHealth())
{
return(false);
}
_targetAntelope = FindClosestAntelope(field);
if (_targetAntelope == null)
{
nextMove = _randomMoveCalculator.GetFreePositionsAndCalculate(Position, field);
}
else
{
nextMove = CalculateMoveToFollowTarget(field);
var nextPos = Position + nextMove;
if (field[nextPos.X, nextPos.Y] == _targetAntelope)
{
_health += _healthForAntelope;
_targetAntelope.Die(EventArgs.Empty);
_targetAntelope = null;
}
}
return(true);
}
private void PerformMating(Field <IAnimal> field)
{
if (_roundsLeftUntilBirth <= 0)
{
var cellBetweenParents = _vectorMath.DivideByNumber(Position + _matingTarget.Position, 2);
GibBirth(new BirthEventArgs(cellBetweenParents));
_roundsLeftUntilBirth = ROUNDS_TO_REPRODUCE;
}
if (_matingTarget != null && MateStillAround(field))
{
_roundsLeftUntilBirth--;
}
else
{
_matingTarget = FindNewMate(field);
_roundsLeftUntilBirth = ROUNDS_TO_REPRODUCE;
}
}
public Antelope FindClosestAntelope(Field <IAnimal> field)
{
Antelope targetAntelope = null;
for (int i = -_visionRange; i <= _visionRange; i++)
{
for (int j = -_visionRange; j <= _visionRange; j++)
{
var currentCellAsAntelope = field[Position.X + i, Position.Y + j] as Antelope;
var currentIsCloser = targetAntelope == null ||
_vectorMath.ToEightWayDistance(new Vector(i, j)) < _vectorMath.ToEightWayDistance(Position - targetAntelope.Position);
if (currentCellAsAntelope != null && currentIsCloser)
{
targetAntelope = currentCellAsAntelope;
}
}
}
return(targetAntelope);
}
public Antelope FindNewMate(Field <IAnimal> field)
{
var closestMateDistance = int.MaxValue;
Antelope newMate = null;
for (int i = -_matingRange; i <= _matingRange; i++)
{
for (int j = -_matingRange; j <= _matingRange; j++)
{
if (i == 0 && j == 0)
{
continue;
}
var checkedCellAsAntelope = field[Position.X + i, Position.Y + j] as Antelope;
if (checkedCellAsAntelope != null && _vectorMath.ToEightWayDistance(i, j) < closestMateDistance)
{
newMate = checkedCellAsAntelope;
closestMateDistance = _vectorMath.ToEightWayDistance(Position - newMate.Position);
}
}
}
return(newMate);
}
