public void Move()
{
if (_velocity.FullStop)
{
return;
}
var newHead = Tail;
Tail = Tail.Head;
Tail.SetConnection(null, -1);
newHead.SetConnection(Head, -1);
newHead.SetConnection(null, 1);
Head.SetConnection(newHead, 1);
Head = newHead;
newHead.CloneXY(newHead.Tail);
newHead.Move(_velocity, _boundWidth, _boundHeight);
if (_isTailOverNewPart)
{
Tail.SetConnection(_nextPartToAdd, -1);
_nextPartToAdd.SetConnection(Tail, 1);
Tail = _nextPartToAdd;
_nextPartToAdd = null;
_isTailOverNewPart = false;
}
if (_nextPartToAdd == null && _partsToAdd.Count > 0)
{
_nextPartToAdd = _partsToAdd.Dequeue();
}
if (_nextPartToAdd != null && (_nextPartToAdd.X == Tail.X &&
_nextPartToAdd.Y == Tail.Y))
{
_isTailOverNewPart = true;
}
}
private void Create()
{
var head = new SnakePart(_initialX, _initialY);
Tail = head;
for (var i = 0; i < _initialLength - 1; i++)
{
var next = new SnakePart(head.X + 1, head.Y);
next.SetConnection(head, -1);
head.SetConnection(next, 1);
head = next;
}
Head = head;
_velocity = new Velocity(0, 0);
}
