public void Move(Direction direction)
{
if (((int)direction + 2) % 4 == (int)previousMove)
{
direction = previousMove;
}
else
{
previousMove = direction;
}
Square head = Snake.First.Value;
int headX = head.X;
int headY = head.Y;
switch (direction)
{
case Direction.UP:
headY -= 1;
if (headY < 0)
{
Gameover = true;
return;
}
break;
case Direction.LEFT:
headX -= 1;
if (headX < 0)
{
Gameover = true;
return;
}
break;
case Direction.DOWN:
headY += 1;
if (headY >= Y)
{
Gameover = true;
return;
}
break;
case Direction.RIGHT:
headX += 1;
if (headX >= X)
{
Gameover = true;
return;
}
break;
}
Square newHead = new Square(headX, headY);
if (Snake.Contains(newHead))
{
Gameover = true;
return;
}
Snake.AddFirst(newHead);
if (newHead.Equals(Food))
{
Hunger = X * Y;
Score += 1;
if (X * Y - Snake.Count == 0)
{
Gameover = true; return;
}
CreateFood(random);
}
else
{
Snake.RemoveLast();
}
--Hunger;
if (Hunger <= 0)
{
Gameover = true;
}
++LifeTime;
}