/// <summary>
/// Used by game controls to face a certain direction. Forbids 180 degree turns when player has a tail.
/// </summary>
/// <param name="dir"></param>
public void TurnTowards(Direction dir)
{
if (TailSize > 0 && dir == _direction.Opposite())
{
return;
}
SetDirectionForced(dir);
}
public bool Update(GameTime gameTime)
{
_elapsedMilliseconds += gameTime.ElapsedGameTime.TotalMilliseconds;
if (_elapsedMilliseconds < _millisecondsBetweenUpdate)
{
return(true);
}
_elapsedMilliseconds = 0;
if (NextDirections.Count > 0)
{
Direction newDirection = NextDirections.Dequeue();
if (Count == 1 || CurrentDirection != newDirection.Opposite())
{
CurrentDirection = newDirection;
}
}
if (_partsToAdd > 0)
{
AddPiece();
_partsToAdd--;
}
MoveLast();
if (Head.Intersects(food))
{
Score += 25;
ChangeSpeed(-5);
food.SetRandomPosition();
AddParts(3);
}
if (HasCollidedWithSelf() || HasCollidedWithWall())
{
return(false);
}
return(true);
}
