public void Update(Cell subject)
{
if (status == CellStatus.empty)
{
return;
}
switch (subject.status)
{
case CellStatus.placeable:
case CellStatus.newplaced:
{
if (color != subject.color)
{
checkingcolor = subject.color;
direction = CalDir(subject);
status = CellStatus.checking;
AnnounceObservers();
}
}
break;
case CellStatus.checking:
{
ReleatedDir dir = CalDir(subject);
if (dir == subject.direction)
{
if (subject.checkingcolor == color)
{
direction = ReverseDir(subject.direction);
status = CellStatus.needflip;
}
else
{
direction = dir;
checkingcolor = subject.checkingcolor;
status = CellStatus.checking;
}
AnnounceObservers();
}
}
break;
case CellStatus.needflip:
{
ReleatedDir dir = CalDir(subject);
if (dir == subject.direction)
{
if (status == CellStatus.placeable)
{
return;
}
if (status == CellStatus.newplaced)
{
status = CellStatus.placeable;
return;
}
direction = dir;
color = (Color)(3 - (int)color);
status = CellStatus.needflip;
AnnounceObservers();
}
}
break;
}
}
ReleatedDir ReverseDir(ReleatedDir dir) => (ReleatedDir)(7 - (int)dir);
