private static void ClearCurrentSnakePartsFromConsole(Model.Snake snake)
{
PrintOnConsole(_oldTail.Row, _oldTail.Col, Constants.EMPTY_SPACE);
PrintOnConsole(_oldHead.Row, _oldHead.Col, Constants.SNAKE_BODY);
var snakeHead = snake.BodyParts.First();
PrintOnConsole(snakeHead.Row, snakeHead.Col, snakeHead.Symbol);
}
private static void DrawSnake(Model.Snake snake)
{
_oldTail = snake.BodyParts.Last();
_oldHead = snake.BodyParts.First();
foreach (var snakeBodyPart in snake.BodyParts)
{
PrintOnConsole(snakeBodyPart.Row, snakeBodyPart.Col, snakeBodyPart.Symbol, ConsoleColor.Yellow);
}
}
private static void CheckSnakeCollision(Model.Snake snake)
{
SnakeNode head = snake.Head;
// check field boundaries
bool isOutOfLeftTopBorders = head.Row < 0 || head.Col < 0;
bool isOutOfRightBottomBorders = head.Row > RowBoundary || head.Col >= ColBoundary;
if (isOutOfLeftTopBorders || isOutOfRightBottomBorders)
{
GameOver();
}
// check food collision
if (_food != null && head.Row == _food.Row && head.Col == _food.Col)
{
_food = null;
snake.Grow();
}
// check self collision
var currentNode = head.Prev;
while (currentNode != null)
{
if (head.Row == currentNode.Row && head.Col == currentNode.Col)
{
GameOver();
}
currentNode = currentNode.Prev;
}
// check obstacles collision
foreach (var obstacle in _obstacles)
{
if (head.Row == obstacle.Row && head.Col == obstacle.Col)
{
GameOver();
}
}
}
private static void RunGameLoop()
{
Console.CursorVisible = false;
var snake = new Model.Snake();
Direction snakeDirection = Direction.Right;
DrawObstacles();
while (isGameRunning)
{
ClearCurrentSnakePartsFromConsole(snake);
DrawSnake(snake);
DrawFood();
snakeDirection = GetDirection(snakeDirection);
snake.Move(snakeDirection);
CheckSnakeCollision(snake);
Thread.Sleep(snake.SnakeSpeedMilliSeconds);
}
}