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Chess "AI" now uses move function like the player

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This commit is contained in:
Wuzzy 2023-07-16 11:06:19 +02:00
parent ef65e86547
commit c1bb45d8b2
1 changed files with 104 additions and 113 deletions
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217
src/chess.lua
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@ -58,7 +58,7 @@ local letters = {'a','b','c','d','e','f','g','h'}
local function index_to_notation(idx) local function index_to_notation(idx)
local x, y = index_to_xy(idx) local x, y = index_to_xy(idx)
if not x then if not x or not y then
return "??" return "??"
end end
local xstr = letters[x+1] or "?" local xstr = letters[x+1] or "?"
@ -893,6 +893,7 @@ local starting_grid = {
"realchess:bishop_black_2", "realchess:bishop_black_2",
"realchess:knight_black_2", "realchess:knight_black_2",
"realchess:rook_black_2", "realchess:rook_black_2",
-- rank '8'
-- rank '7' -- rank '7'
"realchess:pawn_black_1", "realchess:pawn_black_1",
"realchess:pawn_black_2", "realchess:pawn_black_2",
@ -903,8 +904,10 @@ local starting_grid = {
"realchess:pawn_black_7", "realchess:pawn_black_7",
"realchess:pawn_black_8", "realchess:pawn_black_8",
-- ranks '6' thru '3' -- ranks '6' thru '3'
'','','','','','','','','','','','','','','','', '','','','','','','','',
'','','','','','','','','','','','','','','','', '','','','','','','','',
'','','','','','','','',
'','','','','','','','',
-- rank '2' -- rank '2'
"realchess:pawn_white_1", "realchess:pawn_white_1",
"realchess:pawn_white_2", "realchess:pawn_white_2",
@ -1412,34 +1415,36 @@ function realchess.init(pos)
end end
-- The move logic of Chess. -- The move logic of Chess.
-- This is meant to be called when the player *ATTEMPTS* to move a piece -- This is meant to be called when a player *ATTEMPTS* to move a piece
-- from one slot of the inventory to another one and reacts accordingly. -- from one slot of the inventory to another one and reacts accordingly.
-- If the move is valid, the inventory is changed to reflect the new -- If the move is valid, the inventory is changed to reflect the new
-- situation. If the move is invalid, nothing happens. -- situation, and the game state and UI is upated as well and true
-- is returned.
-- If the move is invalid, nothing happens and false is returned.
-- Note: The move can also be done by a computer player.
-- --
-- * pos: Chessboard node pos -- * meta: Chessboard node metadata
-- * from_list: Inventory list of source square -- * from_list: Inventory list of source square
-- * from_index: Inventory index of source square -- * from_index: Inventory index of source square
-- * to_list: Inventory list of destination square -- * to_list: Inventory list of destination square
-- * to_index: Inventory list of destination square -- * to_index: Inventory list of destination square
function realchess.move(pos, from_list, from_index, to_list, to_index, player) -- * playerName: Name of player to move
function realchess.move(meta, from_list, from_index, to_list, to_index, playerName)
if from_list ~= "board" and to_list ~= "board" then if from_list ~= "board" and to_list ~= "board" then
return return false
end end
local meta = minetest.get_meta(pos)
local promo = meta:get_string("promotionActive") local promo = meta:get_string("promotionActive")
if promo ~= "" then if promo ~= "" then
-- Can't move when waiting for selecting a pawn promotion -- Can't move when waiting for selecting a pawn promotion
return return false
end end
local gameResult = meta:get_string("gameResult") local gameResult = meta:get_string("gameResult")
if gameResult ~= "" then if gameResult ~= "" then
-- No moves if game is over -- No moves if game is over
return return false
end end
local playerName = player:get_player_name()
local inv = meta:get_inventory() local inv = meta:get_inventory()
local pieceFrom = inv:get_stack(from_list, from_index):get_name() local pieceFrom = inv:get_stack(from_list, from_index):get_name()
local pieceTo = inv:get_stack(to_list, to_index):get_name() local pieceTo = inv:get_stack(to_list, to_index):get_name()
@ -1452,7 +1457,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
if pieceFrom:find("white") then if pieceFrom:find("white") then
if pieceTo:find("white") then if pieceTo:find("white") then
-- Don't replace pieces of same color -- Don't replace pieces of same color
return return false
end end
if lastMove == "white" then if lastMove == "white" then
@ -1462,7 +1467,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
if playerWhite ~= "" and playerWhite ~= playerName then if playerWhite ~= "" and playerWhite ~= playerName then
minetest.chat_send_player(playerName, chat_prefix .. S("Someone else plays white pieces!")) minetest.chat_send_player(playerName, chat_prefix .. S("Someone else plays white pieces!"))
return return false
end end
playerWhite = playerName playerWhite = playerName
@ -1471,22 +1476,22 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
elseif pieceFrom:find("black") then elseif pieceFrom:find("black") then
if pieceTo:find("black") then if pieceTo:find("black") then
-- Don't replace pieces of same color -- Don't replace pieces of same color
return return false
end end
if lastMove == "black" then if lastMove == "black" then
-- let the other invocation decide in case of a capture -- let the other invocation decide in case of a capture
return return false
end end
if playerBlack ~= "" and playerBlack ~= playerName then if playerBlack ~= "" and playerBlack ~= playerName then
minetest.chat_send_player(playerName, chat_prefix .. S("Someone else plays black pieces!")) minetest.chat_send_player(playerName, chat_prefix .. S("Someone else plays black pieces!"))
return return false
end end
if lastMove == "" then if lastMove == "" then
-- Nobody has moved yet, and Black cannot move first -- Nobody has moved yet, and Black cannot move first
return return false
end end
playerBlack = playerName playerBlack = playerName
@ -1511,7 +1516,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
-- single step -- single step
if from_x == to_x then if from_x == to_x then
if pieceTo ~= "" then if pieceTo ~= "" then
return return false
elseif to_index >= 1 and to_index <= 8 then elseif to_index >= 1 and to_index <= 8 then
-- activate promotion -- activate promotion
promotion = true promotion = true
@ -1528,17 +1533,17 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
meta:set_int("promotionPawnToIdx", to_index) meta:set_int("promotionPawnToIdx", to_index)
end end
else else
return return false
end end
elseif from_y - 2 == to_y then elseif from_y - 2 == to_y then
-- double step -- double step
if pieceTo ~= "" or from_y < 6 or pawnWhiteMove ~= "" then if pieceTo ~= "" or from_y < 6 or pawnWhiteMove ~= "" then
return return false
end end
-- store the destination of this double step in meta (needed for en passant check) -- store the destination of this double step in meta (needed for en passant check)
doublePawnStep = to_index doublePawnStep = to_index
else else
return return false
end end
--[[ --[[
@ -1552,7 +1557,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
if from_x == to_x then if from_x == to_x then
if pieceTo ~= "" then if pieceTo ~= "" then
return return false
end end
elseif from_x - 1 == to_x or from_x + 1 == to_x then elseif from_x - 1 == to_x or from_x + 1 == to_x then
-- capture -- capture
@ -1568,10 +1573,10 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
end end
end end
if not can_capture then if not can_capture then
return return false
end end
else else
return return false
end end
elseif thisMove == "black" then elseif thisMove == "black" then
@ -1581,7 +1586,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
-- single step -- single step
if from_x == to_x then if from_x == to_x then
if pieceTo ~= "" then if pieceTo ~= "" then
return return false
elseif to_index >= 57 and to_index <= 64 then elseif to_index >= 57 and to_index <= 64 then
-- activate promotion -- activate promotion
promotion = true promotion = true
@ -1598,17 +1603,17 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
meta:set_int("promotionPawnToIdx", to_index) meta:set_int("promotionPawnToIdx", to_index)
end end
else else
return return false
end end
elseif from_y + 2 == to_y then elseif from_y + 2 == to_y then
-- double step -- double step
if pieceTo ~= "" or from_y > 1 or pawnBlackMove ~= "" then if pieceTo ~= "" or from_y > 1 or pawnBlackMove ~= "" then
return return false
end end
-- store the destination of this double step in meta (needed for en passant check) -- store the destination of this double step in meta (needed for en passant check)
doublePawnStep = to_index doublePawnStep = to_index
else else
return return false
end end
--[[ --[[
@ -1622,7 +1627,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
if from_x == to_x then if from_x == to_x then
if pieceTo ~= "" then if pieceTo ~= "" then
return return false
end end
elseif from_x - 1 == to_x or from_x + 1 == to_x then elseif from_x - 1 == to_x or from_x + 1 == to_x then
-- capture -- capture
@ -1638,13 +1643,13 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
end end
end end
if not can_capture then if not can_capture then
return return false
end end
else else
return return false
end end
else else
return return false
end end
-- ROOK -- ROOK
@ -1656,7 +1661,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
-- Ensure that no piece disturbs the way -- Ensure that no piece disturbs the way
for i = from_y + 1, to_y - 1 do for i = from_y + 1, to_y - 1 do
if inv:get_stack(from_list, xy_to_index(from_x, i)):get_name() ~= "" then if inv:get_stack(from_list, xy_to_index(from_x, i)):get_name() ~= "" then
return return false
end end
end end
else else
@ -1664,7 +1669,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
-- Ensure that no piece disturbs the way -- Ensure that no piece disturbs the way
for i = to_y + 1, from_y - 1 do for i = to_y + 1, from_y - 1 do
if inv:get_stack(from_list, xy_to_index(from_x, i)):get_name() ~= "" then if inv:get_stack(from_list, xy_to_index(from_x, i)):get_name() ~= "" then
return return false
end end
end end
end end
@ -1675,7 +1680,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
-- ensure that no piece disturbs the way -- ensure that no piece disturbs the way
for i = from_x + 1, to_x - 1 do for i = from_x + 1, to_x - 1 do
if inv:get_stack(from_list, xy_to_index(i, from_y)):get_name() ~= "" then if inv:get_stack(from_list, xy_to_index(i, from_y)):get_name() ~= "" then
return return false
end end
end end
else else
@ -1683,13 +1688,13 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
-- Ensure that no piece disturbs the way -- Ensure that no piece disturbs the way
for i = to_x + 1, from_x - 1 do for i = to_x + 1, from_x - 1 do
if inv:get_stack(from_list, xy_to_index(i, from_y)):get_name() ~= "" then if inv:get_stack(from_list, xy_to_index(i, from_y)):get_name() ~= "" then
return return false
end end
end end
end end
else else
-- Attempt to move arbitrarily -> abort -- Attempt to move arbitrarily -> abort
return return false
end end
-- Lose castling right when moving rook -- Lose castling right when moving rook
@ -1726,7 +1731,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
-- Ensure that dx == 1 and dy == 2 -- Ensure that dx == 1 and dy == 2
if dx ~= 1 or dy ~= 2 then if dx ~= 1 or dy ~= 2 then
return return false
end end
-- Just ensure that destination cell does not contain friend piece -- Just ensure that destination cell does not contain friend piece
-- ^ It was done already thus everything ok -- ^ It was done already thus everything ok
@ -1742,7 +1747,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
if dy < 0 then dy = -dy end if dy < 0 then dy = -dy end
-- Ensure dx and dy are equal -- Ensure dx and dy are equal
if dx ~= dy then return end if dx ~= dy then return false end
if from_x < to_x then if from_x < to_x then
if from_y < to_y then if from_y < to_y then
@ -1751,7 +1756,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
for i = 1, dx - 1 do for i = 1, dx - 1 do
if inv:get_stack( if inv:get_stack(
from_list, xy_to_index(from_x + i, from_y + i)):get_name() ~= "" then from_list, xy_to_index(from_x + i, from_y + i)):get_name() ~= "" then
return return false
end end
end end
else else
@ -1760,7 +1765,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
for i = 1, dx - 1 do for i = 1, dx - 1 do
if inv:get_stack( if inv:get_stack(
from_list, xy_to_index(from_x + i, from_y - i)):get_name() ~= "" then from_list, xy_to_index(from_x + i, from_y - i)):get_name() ~= "" then
return return false
end end
end end
end end
@ -1771,7 +1776,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
for i = 1, dx - 1 do for i = 1, dx - 1 do
if inv:get_stack( if inv:get_stack(
from_list, xy_to_index(from_x - i, from_y + i)):get_name() ~= "" then from_list, xy_to_index(from_x - i, from_y + i)):get_name() ~= "" then
return return false
end end
end end
else else
@ -1780,7 +1785,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
for i = 1, dx - 1 do for i = 1, dx - 1 do
if inv:get_stack( if inv:get_stack(
from_list, xy_to_index(from_x - i, from_y - i)):get_name() ~= "" then from_list, xy_to_index(from_x - i, from_y - i)):get_name() ~= "" then
return return false
end end
end end
end end
@ -1797,7 +1802,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
-- Ensure valid relative move -- Ensure valid relative move
if dx ~= 0 and dy ~= 0 and dx ~= dy then if dx ~= 0 and dy ~= 0 and dx ~= dy then
return return false
end end
if from_x == to_x then if from_x == to_x then
@ -1806,7 +1811,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
-- Ensure that no piece disturbs the way -- Ensure that no piece disturbs the way
for i = from_y + 1, to_y - 1 do for i = from_y + 1, to_y - 1 do
if inv:get_stack(from_list, xy_to_index(from_x, i)):get_name() ~= "" then if inv:get_stack(from_list, xy_to_index(from_x, i)):get_name() ~= "" then
return return false
end end
end end
else else
@ -1814,7 +1819,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
-- Ensure that no piece disturbs the way -- Ensure that no piece disturbs the way
for i = to_y + 1, from_y - 1 do for i = to_y + 1, from_y - 1 do
if inv:get_stack(from_list, xy_to_index(from_x, i)):get_name() ~= "" then if inv:get_stack(from_list, xy_to_index(from_x, i)):get_name() ~= "" then
return return false
end end
end end
end end
@ -1824,7 +1829,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
-- Ensure that no piece disturbs the way -- Ensure that no piece disturbs the way
for i = from_x + 1, to_x - 1 do for i = from_x + 1, to_x - 1 do
if inv:get_stack(from_list, xy_to_index(i, from_y)):get_name() ~= "" then if inv:get_stack(from_list, xy_to_index(i, from_y)):get_name() ~= "" then
return return false
end end
end end
elseif from_y < to_y then elseif from_y < to_y then
@ -1833,7 +1838,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
for i = 1, dx - 1 do for i = 1, dx - 1 do
if inv:get_stack( if inv:get_stack(
from_list, xy_to_index(from_x + i, from_y + i)):get_name() ~= "" then from_list, xy_to_index(from_x + i, from_y + i)):get_name() ~= "" then
return return false
end end
end end
else else
@ -1842,7 +1847,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
for i = 1, dx - 1 do for i = 1, dx - 1 do
if inv:get_stack( if inv:get_stack(
from_list, xy_to_index(from_x + i, from_y - i)):get_name() ~= "" then from_list, xy_to_index(from_x + i, from_y - i)):get_name() ~= "" then
return return false
end end
end end
end end
@ -1852,7 +1857,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
-- Ensure that no piece disturbs the way and destination cell does -- Ensure that no piece disturbs the way and destination cell does
for i = to_x + 1, from_x - 1 do for i = to_x + 1, from_x - 1 do
if inv:get_stack(from_list, xy_to_index(i, from_y)):get_name() ~= "" then if inv:get_stack(from_list, xy_to_index(i, from_y)):get_name() ~= "" then
return return false
end end
end end
elseif from_y < to_y then elseif from_y < to_y then
@ -1861,7 +1866,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
for i = 1, dx - 1 do for i = 1, dx - 1 do
if inv:get_stack( if inv:get_stack(
from_list, xy_to_index(from_x - i, from_y + i)):get_name() ~= "" then from_list, xy_to_index(from_x - i, from_y + i)):get_name() ~= "" then
return return false
end end
end end
else else
@ -1870,7 +1875,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
for i = 1, dx - 1 do for i = 1, dx - 1 do
if inv:get_stack( if inv:get_stack(
from_list, xy_to_index(from_x - i, from_y - i)):get_name() ~= "" then from_list, xy_to_index(from_x - i, from_y - i)):get_name() ~= "" then
return return false
end end
end end
end end
@ -1903,7 +1908,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
end end
if dx > 1 or dy > 1 then if dx > 1 or dy > 1 then
return return false
end end
end end
kingMoved = true kingMoved = true
@ -1916,7 +1921,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
local black_king_idx, white_king_idx = locate_kings(board) local black_king_idx, white_king_idx = locate_kings(board)
if not black_king_idx or not white_king_idx then if not black_king_idx or not white_king_idx then
return return false
end end
local blackAttacked = attacked("black", black_king_idx, board) local blackAttacked = attacked("black", black_king_idx, board)
local whiteAttacked = attacked("white", white_king_idx, board) local whiteAttacked = attacked("white", white_king_idx, board)
@ -1924,10 +1929,10 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
-- Refuse to move if it would put or leave the own king -- Refuse to move if it would put or leave the own king
-- under attack -- under attack
if blackAttacked and thisMove == "black" then if blackAttacked and thisMove == "black" then
return return false
end end
if whiteAttacked and thisMove == "white" then if whiteAttacked and thisMove == "white" then
return return false
end end
if en_passant_target then if en_passant_target then
@ -1959,7 +1964,7 @@ function realchess.move(pos, from_list, from_index, to_list, to_index, player)
realchess.move_piece(meta, pieceFrom, from_list, from_index, to_list, to_index) realchess.move_piece(meta, pieceFrom, from_list, from_index, to_list, to_index)
return return true
end end
local function ai_move(inv, meta) local function ai_move(inv, meta)
@ -2019,65 +2024,43 @@ local function ai_move(inv, meta)
local lastMove = meta:get_string("lastMove") local lastMove = meta:get_string("lastMove")
local lastMoveTime = meta:get_int("lastMoveTime") local lastMoveTime = meta:get_int("lastMoveTime")
if lastMoveTime > 0 or lastMove == "" then if lastMoveTime > 0 or lastMove == "" then
if not kingSafe then
if bestMoveSaveTo ~= nil then
inv:set_stack("board", bestMoveSaveTo, board[bestMoveSaveFrom])
inv:set_stack("board", bestMoveSaveFrom, "")
meta:set_string(aiColor.."Attacked", "")
else
return
end
else
if aiColor == "black" and pieceFrom:find("pawn") and choice_to >= 57 and choice_to <= 64 then
inv:set_stack("board", choice_to, "realchess:queen_black")
elseif aiColor == "white" and pieceFrom:find("pawn") and choice_to >= 1 and choice_to <= 8 then
inv:set_stack("board", choice_to, "realchess:queen_white")
else
inv:set_stack("board", choice_to, pieceFrom)
end
-- Note the pawn double step
local c_from_x, c_from_y = index_to_xy(choice_from)
local c_to_x, c_to_y = index_to_xy(choice_to)
if pieceFrom:find("pawn") and math.abs(c_from_y - c_to_y) == 2 then
meta:set_int("prevDoublePawnStepTo", choice_to)
else
meta:set_int("prevDoublePawnStepTo", 0)
end
inv:set_stack("board", choice_from, "")
end
board = board_to_table(inv)
black_king_idx, white_king_idx = locate_kings(board)
local opponent_king_idx
if opponentColor == "white" then
opponent_king_idx = white_king_idx
else
opponent_king_idx = black_king_idx
end
local opponentAttacked = attacked(opponentColor, opponent_king_idx, board)
if opponentAttacked then
meta:set_string(opponentColor.."Attacked", "true")
end
if aiColor == "black" and meta:get_string("playerBlack") == "" then if aiColor == "black" and meta:get_string("playerBlack") == "" then
meta:set_string("playerBlack", AI_NAME) meta:set_string("playerBlack", AI_NAME)
elseif aiColor == "white" and meta:get_string("playerWhite") == "" then elseif aiColor == "white" and meta:get_string("playerWhite") == "" then
meta:set_string("playerWhite", AI_NAME) meta:set_string("playerWhite", AI_NAME)
end end
local moveOK = false
meta:set_string("lastMove", aiColor) if not kingSafe then
meta:set_int("lastMoveTime", minetest.get_gametime()) -- Make a move to put the king out of check
if bestMoveSaveTo ~= nil then
add_move_to_moves_list(meta, pieceFrom, pieceTo, choice_from, choice_to) moveOK = realchess.move(meta, "board", bestMoveSaveFrom, "board", bestMoveSaveTo, AI_NAME)
add_to_eaten_list(meta, pieceTo) if not moveOK then
minetest.log("error", "[xdecor] Chess: AI tried to make an invalid move (to protect the king) from "..
update_game_result(meta) index_to_notation(bestMoveSaveFrom).." to "..index_to_notation(bestMoveSaveTo))
end
update_formspec(meta) else
else return
end
else
-- Make a regular move
moveOK = realchess.move(meta, "board", choice_from, "board", choice_to, AI_NAME)
if not moveOK then
minetest.log("error", "[xdecor] Chess: AI tried to make an invalid move from "..
index_to_notation(choice_from).." to "..index_to_notation(choice_to))
end
end
-- AI resigns if it made an incorrect move
if not moveOK then
meta:set_string("gameResultReason", "resign")
if aiColor == "black" then
meta:set_string("gameResult", "whiteWon")
add_special_to_moves_list(meta, "whiteWon")
else
meta:set_string("gameResult", "blackWon")
add_special_to_moves_list(meta, "blackWon")
end
update_formspec(meta)
end
end end
end) end)
else else
@ -2408,7 +2391,15 @@ if ENABLE_CHESS_GAMES then
-- to move pieces to. -- to move pieces to.
-- This function may manipulate the inventory. This is a bit dirty -- This function may manipulate the inventory. This is a bit dirty
-- because this is not really what the allow function is meant to do. -- because this is not really what the allow function is meant to do.
realchess.move(pos, from_list, from_index, to_list, to_index, player) local meta = minetest.get_meta(pos)
local playerName
if player and player:is_player() then
playerName = player:get_player_name()
else
playerName = "<UNKNOWN PLAYER>"
minetest.log("error", "[xdecor] Chess: An unknown player tried to move a piece in the chessboard inventory")
end
realchess.move(meta, from_list, from_index, to_list, to_index, playerName)
-- We always return 0 to disable all *builtin* inventory moves, since -- We always return 0 to disable all *builtin* inventory moves, since
-- we do it ourselves. This should be fine because there shouldn't be a -- we do it ourselves. This should be fine because there shouldn't be a
-- conflict between this mod and Minetest then. -- conflict between this mod and Minetest then.