private void PlaceFood()
{
TwoDPoint fp = RandomPoint(_emptyTiles);
_field[fp.X, fp.Y] = Tile.food;
_emptyTiles.Remove(fp);
_food.Add(fp);
}
public override bool Equals(object obj)
{
if (obj == null || obj.GetType() != this.GetType())
{
return(false);
}
// If parameter cannot be cast to Point return false.
TwoDPoint p = (TwoDPoint)obj;
return(X == p.X && Y == p.Y);
}
private void PlaceSnake()
{
_nextPos = RandomPoint(_emptyTiles);
_snake = new Snake(_nextPos);
DrawSnakeHeadOnTiles();
for (int i = 0; i < SnakeStartingLength - 1; i++)
{
_nextPos = RandomPoint(GetAdjacent(_nextPos));
_snake.Grow(_nextPos);
DrawSnakeHeadOnTiles();
}
}
void MoveTo(TwoDPoint p)
{
if (_food.Contains(p))
{
_snake.Grow(p);
_score++;
_food.Remove(p);
}
else
{
_emptyTiles.Remove(p);
_field[_snake.Tail.X, _snake.Tail.Y] = Tile.empty;
_emptyTiles.Add(_snake.Tail);
_snake.Move(p);
}
_field[p.X, p.Y] = Tile.snake;
}
private bool isInvalid(TwoDPoint p)
{
return(p.X < 0 || p.Y < 0 || p.X >= Width || p.Y >= Height);
}
private IEnumerable <TwoDPoint> GetAdjacent(TwoDPoint point)
{
return(_emptyTiles.Where(p => p.ManhattanDistance(point) == 1));
}
//public void UnGrow()
//{
// _points.RemoveAt(_points.Count - 1);
//}
public void Move(TwoDPoint p)
{
_points.Dequeue();
_points.Enqueue(p);
}
public void Grow(TwoDPoint p)
{
_points.Enqueue(p);
}
public Snake(int x, int y)
{
TwoDPoint starting = new TwoDPoint(x, y);
_points.Enqueue(starting);
}
public Snake(TwoDPoint starting)
{
_points.Enqueue(starting);
}
//readonly List<TwoDPoint> _points = new List<TwoDPoint>();
public Snake()
{
TwoDPoint p = new TwoDPoint(0, 0);
_points.Enqueue(p);
}
public bool Equals(TwoDPoint p)
{
return(X == p.X && Y == p.Y);
}
internal int ManhattanDistance(TwoDPoint p)
{
return(Math.Abs(_x - p.X) + Math.Abs(_y - p.Y));
}