public bool CollisionWithSelf()
{
SnakeElement snakeHead = Head;
if (snakeHead != null)
{
foreach (var snakeElement in Elements)
{
if (!snakeElement.IsHead)
{
if (snakeElement.X == snakeHead.X && snakeElement.Y == snakeHead.Y)
{
return(true);
}
}
}
}
return(false);
}
internal void MoveSnake()
{
SnakeElement head = Elements[0];
SnakeElement tail = Elements[Elements.Count - 1];
TailBackup = new SnakeElement(_elementSize)
{
X = tail.X,
Y = tail.Y
};
head.IsHead = false;
tail.IsHead = true;
tail.X = head.X;
tail.Y = head.Y;
switch (MovementDirection)
{
case MovementDirection.Right:
tail.X += _elementSize;
break;
case MovementDirection.Left:
tail.X -= _elementSize;
break;
case MovementDirection.Up:
tail.Y -= _elementSize;
break;
case MovementDirection.Down:
tail.Y += _elementSize;
break;
default:
break;
}
Elements.RemoveAt(Elements.Count - 1);
Elements.Insert(0, tail);
}
