public void MoveSnake()
{
try
{
while (snakeParts.Count >= snakeLenght)
{
_canvas.Children.Remove(snakeParts[0].UiElement);
snakeParts.RemoveAt(0);
}
foreach (SnakePart snakePart in snakeParts)
{
snakePart.IsHead = false;
(snakePart.UiElement as Rectangle).Fill = snakeBodyColorBrush;
}
SnakePart snakeHead = snakeParts.Last();
int nextX = (int)snakeHead.Position.X;
int nextY = (int)snakeHead.Position.Y;
switch (SnakeDirection)
{
case SnakeDirections.Left:
nextX -= _squareSize;
break;
case SnakeDirections.Right:
nextX += _squareSize;
break;
case SnakeDirections.Up:
nextY -= _squareSize;
break;
case SnakeDirections.Down:
nextY += _squareSize;
break;
}
SnakePart newSnakeHead = new SnakePart
{
IsHead = true,
Position = new Point(nextX, nextY),
};
snakeParts.Add(newSnakeHead);
DrawSnake();
DoCheckCollision();
}
catch (Exception ex)
{
throw;
}
}
private void DrawSnakeFood()
{
Point foodPosition = GetFoodPosition();
snakeFood = new SnakePart
{
Position = foodPosition,
UiElement = new Ellipse
{
Width = _squareSize,
Height = _squareSize,
Fill = snakeFoodColorBrush
}
};
_canvas.Children.Add(snakeFood.UiElement);
Canvas.SetTop(snakeFood.UiElement, snakeFood.Position.Y);
Canvas.SetLeft(snakeFood.UiElement, snakeFood.Position.X);
}
private void DoCheckCollision()
{
try
{
SnakePart snakeHead = snakeParts.First(x => x.IsHead);
if (snakeHead.Position.X == snakeFood?.Position.X && snakeHead.Position.Y == snakeFood.Position.Y)
{
OnFoodEaten();
}
if (snakeHead.Position.X >= _canvas.ActualWidth || snakeHead.Position.X < 0 ||
snakeHead.Position.Y >= _canvas.ActualHeight || snakeHead.Position.Y < 0 ||
snakeParts.Where(x => !x.IsHead && x.Position.X == snakeHead.Position.X && x.Position.Y == snakeHead.Position.Y).Count() > 0)
{
OnGameOver();
}
}
catch (Exception ex)
{
throw;
}
}
public void StartNewGame()
{
try
{
currentPoint = 0;
snakeLenght = SnakeStartintLenght;
SnakeDirection = SnakeDirections.Right;
if (snakeParts != null)
{
foreach (SnakePart snakePart in snakeParts)
{
if (_canvas.Children.Contains(snakePart.UiElement))
{
_canvas.Children.Remove(snakePart.UiElement);
}
}
snakeParts.Clear();
}
snakeParts.Add(new SnakePart {
Position = new Point(_squareSize * 5, _squareSize * 5)
});
DrawSnake();
if (snakeFood != null && _canvas.Children.Contains(snakeFood.UiElement))
{
_canvas.Children.Remove(snakeFood.UiElement);
snakeFood = null;
}
DrawSnakeFood();
OnNewGameStarted();
UpdateGameStatus();
}
catch (Exception ex)
{
throw;
}
}