private bool IncrementLayer()
{
current_layer++;
if (current_layer > max_layer)
{
return(false);
}
state = SpiralState.Bottom;
Current = Vector3Int.one * (current_layer * -1);
return(true);
}
public bool MoveNext()
{
if (current_layer == -1)
{
current_layer = 0;
return(true);
}
switch (state)
{
case SpiralState.Center:
return(IncrementLayer());
case SpiralState.Bottom:
if (!NextInPlane())
{
state = SpiralState.Middle;
Current = Vector3Int.one * -current_layer + new Vector3Int(0, 0, 1);
}
break;
case SpiralState.Middle:
if (!NextInMiddle())
{
if (Current.z == current_layer - 1)
{
state = SpiralState.Top;
Current = new Vector3Int(-current_layer, -current_layer, current_layer);
}
else
{
Current = new Vector3Int(-current_layer, -current_layer, Current.z + 1);
}
}
break;
case SpiralState.Top:
if (!NextInPlane())
{
return(IncrementLayer());
}
break;
default:
throw new ArgumentOutOfRangeException();
}
return(true);
}
public void Reset()
{
Current = Vector3Int.zero;
current_layer = -1;
state = SpiralState.Center;
}
