private void MoveSnake()
{
while (snakeParts.Count >= snakeLength)
{
GameArea.Children.Remove(snakeParts[0].UiElement);
snakeParts.RemoveAt(0);
}
foreach (SnakePart snakePart in snakeParts)
{
(snakePart.UiElement as Rectangle).Fill = snakeBodyBrush;
snakePart.IsHead = false;
}
SnakePart snakeHead = snakeParts[snakeParts.Count - 1];
double nextX = snakeHead.Position.X;
double nextY = snakeHead.Position.Y;
switch (snakeDirection)
{
case SnakeDirection.Left:
if (snakeHead.Position.X < 20)
{
nextX = GameArea.ActualWidth - 20;
break;
}
nextX -= SnakeSquareSize;
break;
case SnakeDirection.Right:
if (snakeHead.Position.X >= GameArea.ActualWidth - 20)
{
nextX = 0;
break;
}
nextX += SnakeSquareSize;
break;
case SnakeDirection.Up:
if (snakeHead.Position.Y < 20)
{
nextY = GameArea.ActualHeight - 20;
break;
}
nextY -= SnakeSquareSize;
break;
case SnakeDirection.Down:
if (snakeHead.Position.Y >= GameArea.ActualHeight - 20)
{
nextY = 0;
break;
}
nextY += SnakeSquareSize;
break;
}
snakeParts.Add(new SnakePart()
{
Position = new Point(nextX, nextY),
IsHead = true
});
DrawSnake();
DoCollisionCheck();
}