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Improved hand and meld records
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parent
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commit
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3 changed files with 46 additions and 59 deletions
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@ -1,21 +1,21 @@
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-type wind() :: east | south | west | north.
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-type dragon() :: green | red | white.
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-record(tile, {
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suit,
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value
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suit :: pin | man | sou | wind | dragon,
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value :: integer() | wind() | dragon(),
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from=draw :: draw | wind()
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}).
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-type tile() :: #tile{}.
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-record(meld, {
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type :: pair | chii | pon | kan,
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tiles :: [tile()]
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}).
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-type meld() :: #meld{}.
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-record(hand, {
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tiles=[],
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sets=[],
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seqs=[]
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}).
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-record(set, {
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count,
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tile,
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open=true
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}).
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-record(seq, {
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tiles,
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open=true
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tiles=[] :: [tile()],
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melds=[] :: [meld()]
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}).
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-type hand() :: #hand{}.
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@ -10,21 +10,16 @@ find(Tiles) ->
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find([], Hand, Possible) ->
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[Hand|Possible];
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find(Tiles, Hand = #hand{tiles=HT, sets=HS}, Possible) ->
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case Tiles of
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[T, T, T, T|Rest] ->
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find(Rest, Hand#hand{sets=[#set{count=4, tile=T, open=false}|HS]}, Possible);
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_ -> []
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end ++
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find(Tiles, Hand = #hand{tiles=HT, melds=HM}, Possible) ->
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case Tiles of
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[T, T, T|Rest] ->
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find(Rest, Hand#hand{sets=[#set{count=3, tile=T, open=false}|HS]}, Possible);
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find(Rest, Hand#hand{melds=[#meld{type=pon, tiles=[T, T, T]}|HM]}, Possible);
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_ ->
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[]
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end ++
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case Tiles of
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[T, T|Rest] ->
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find(Rest, Hand#hand{sets=[#set{count=2, tile=T, open=false}|HS]}, Possible);
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find(Rest, Hand#hand{melds=[#meld{type=pair, tiles=[T, T]}|HM]}, Possible);
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_ ->
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[]
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end ++
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@ -32,7 +27,7 @@ find(Tiles, Hand = #hand{tiles=HT, sets=HS}, Possible) ->
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[T1 = #tile{value=V1, suit=S}, T2 = #tile{value=V2, suit=S}, T3 = #tile{value=V3, suit=S}|_] when
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is_integer(V1) andalso
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[V1, V2, V3] =:= [V1, V1 + 1, V1 + 2] ->
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find(Tiles -- [T1, T2, T3], Hand#hand{sets=[#seq{tiles=[T1, T2, T3], open=false}|HS]}, Possible);
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find(Tiles -- [T1, T2, T3], Hand#hand{melds=[#meld{type=chii, tiles=[T1, T2, T3]}|HM]}, Possible);
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_ ->
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[]
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end ++
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@ -41,12 +36,12 @@ find(Tiles, Hand = #hand{tiles=HT, sets=HS}, Possible) ->
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find(Rest, Hand#hand{tiles=[T|HT]}, Possible)
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end.
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is_complete(#hand{tiles=[], sets=Sets}) ->
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Pairs = [S || S <- Sets, S#set.count =:= 2],
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is_complete(#hand{tiles=[], melds=Melds}) ->
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Pairs = [M || M <- Melds, M#meld.type =:= pair],
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case length(Pairs) of
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1 ->
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% Four mentsu + 1 pair = 5 sets
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length(Sets) =:= 5;
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length(Melds) =:= 5;
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7 ->
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% Must be seven *unique* pairs
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sets:size(sets:from_list(Pairs)) =:= 7;
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@ -57,9 +52,9 @@ is_complete(#hand{}=Hand) ->
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kokushi_musou(Hand).
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% 13 Orphans
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kokushi_musou(#hand{tiles=Tiles, sets=Sets}) when
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kokushi_musou(#hand{tiles=Tiles, melds=Melds}) when
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length(Tiles) =:= 13
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andalso length(Sets) =:= 0 ->
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andalso length(Melds) =:= 0 ->
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not lists:any(fun(#tile{value=V}) ->
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lists:member(V, lists:seq(2,8))
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end,
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50
src/yaku.erl
50
src/yaku.erl
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@ -5,21 +5,23 @@
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-compile([export_all]).
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yakuhai(#hand{sets=Sets}) ->
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length(lists:filter(fun(T = #tile{}) ->
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case T#tile.suit of
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wind ->
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yakuhai(#hand{melds=Melds}) ->
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length(lists:filter(fun(#meld{type=Type, tiles=[T|_]}) ->
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case {Type, T} of
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{pair, _} ->
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false;
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{chii, _} ->
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false;
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{_, #tile{suit=wind}} ->
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% TODO: Round/Seat Winds
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false;
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dragon ->
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true;
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_ ->
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false
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{_, #tile{suit=dragon}} ->
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true
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end
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end,
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Sets)).
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Melds)).
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tanyao(#hand{sets=Sets}) ->
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tanyao(#hand{melds=Melds}) ->
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not lists:any(fun(T = #tile{}) ->
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case T#tile.suit of
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dragon ->
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@ -30,32 +32,22 @@ tanyao(#hand{sets=Sets}) ->
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lists:member(T#tile.value, [1,9])
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end
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end,
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Sets).
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lists:flatten([Tiles || #meld{tiles=Tiles} <- Melds])).
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pinfu(#hand{sets=Sets}) ->
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pinfu(#hand{melds=Melds}) ->
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% TODO: Verify closed, open wait, pair not round/seat wind
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lists:all(fun(S) ->
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case S of
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#seq{} ->
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true;
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_ ->
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false
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end
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end,
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[S || S <- Sets]).
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length([M || M = #meld{type=T} <- Melds, T =:= chii]) =:= 4.
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% 7 Pairs
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chiitoitsu(#hand{tiles=[], sets=Sets})
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when length(Sets) =:= 7 ->
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Pairs = [S || S <- Sets, S#set.count =:= 2],
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chiitoitsu(#hand{tiles=[], melds=Melds})
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when length(Melds) =:= 7 ->
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Pairs = [S || S <- Melds, S#meld.type =:= pair],
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length(Pairs) =:= 7 andalso sets:size(sets:from_list(Pairs)) =:= 7.
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% 13 Orphans
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kokushi_musou(#hand{tiles=Tiles, sets=Sets})
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when length(Tiles) =:= 13
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andalso length(Sets) =:= 0 ->
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kokushi_musou(#hand{tiles=Tiles, melds=[#meld{type=pair, tiles=[T,T]}]}) ->
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not lists:any(fun(#tile{value=V}) ->
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lists:member(V, lists:seq(2,8))
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end,
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Tiles)
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andalso sets:size(sets:from_list(Tiles)) =:= 13.
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[T|Tiles])
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andalso sets:size(sets:from_list([T|Tiles])) =:= 13.
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