/// <summary>
/// Copy constructor.
/// </summary>
/// <param name="snakePart"></param>
public SnakeBodyPart(SnakeBodyPart snakeBodyPart)
{
_gameBoardWidthPixels = snakeBodyPart.GameBoardWidthPixels;
_gameBoardHeightPixels = snakeBodyPart.GameBoardHeightPixels;
_xPosition = snakeBodyPart.XPosition;
_yPosition = snakeBodyPart.YPosition;
_width = snakeBodyPart.WidthPixels;
_height = snakeBodyPart.HeightPixels;
_directionOfTravel = snakeBodyPart.DirectionOfTravel;
}
/// <summary>
/// The UpdateSnakeStatus method is called to update the status of the snake.
/// The snake's position is updated.
/// Events are raised if the snake has hit a boundary, hit itself, or eaten the cherry.
/// </summary>
public void UpdateSnakeStatus(Cherry theCherry)
{
while (_updatingSnake)
{
Thread.Sleep(50);
}
_updatingSnake = true;
TheSnakeHead.UpdatePosition(); // Update the position of the snake's head.
TheSnakeEye.UpdatePosition(); // Update the position of the snake's eye.
// Update the position of the snake's body.
Direction previousDirection;
Direction nextDirection = TheSnakeHead.DirectionOfTravel;
foreach (SnakeBodyPart bodyPart in _snakeBody)
{
bodyPart.UpdatePosition();
previousDirection = bodyPart.DirectionOfTravel;
bodyPart.DirectionOfTravel = nextDirection;
nextDirection = previousDirection;
}
// Check if the snake has hit a boundary.
if (TheSnakeHead.HitBoundary())
{
// The snake has hit the boundary - raise an OnHitBoundary event.
OnHitBoundary?.Invoke();
}
// Check if the snake has hit itself.
if (TheSnakeHead.HitSelf(_snakeBody))
{
// The snake has hit itself - raise an OnHitSnake event.
OnHitSnake?.Invoke();
}
// Check if the snake can eat the cherry.
if (TheSnakeHead.EatCherry(theCherry))
{
// The snake has eaten the cherry - increase the length of the snake.
SnakeBodyPart snakeBodyPart = new SnakeBodyPart(_gameBoardWidthPixels, _gameBoardHeightPixels, this);
_snakeBody.Add(snakeBodyPart);
// The snake has eaten the cherry - raise an OnEatCherry event.
OnEatCherry?.Invoke();
}
_updatingSnake = false;
}
