659 lines
18 KiB
Lua
659 lines
18 KiB
Lua
-- See https://github.com/kilbith/realchess for the main repository
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local realchess = {}
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screwdriver = screwdriver or {}
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local function index_to_xy(index)
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index = index - 1
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local x = index % 8
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local y = (index - x) / 8
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return x, y
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end
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local function xy_to_index(x, y)
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return x + y * 8 + 1
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end
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function realchess.init(pos)
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local meta = minetest.get_meta(pos)
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local inv = meta:get_inventory()
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inv:set_size("board", 64)
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local formspec = [[ size[8,8.6;]
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bgcolor[#080808BB;true]
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background[0,0;8,8;chess_bg.png]
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button[3.1,7.8;2,2;new;New game]
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list[context;board;0,0;8,8;]
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listcolors[#00000000;#00000000;#00000000;#30434C;#FFF] ]]
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meta:set_string("formspec", formspec)
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meta:set_string("infotext", "Chess Board")
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meta:set_string("playerBlack", "")
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meta:set_string("playerWhite", "")
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meta:set_string("lastMove", "")
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meta:set_int("lastMoveTime", 0)
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meta:set_string("winner", "")
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meta:set_int("castlingBlackL", 1)
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meta:set_int("castlingBlackR", 1)
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meta:set_int("castlingWhiteL", 1)
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meta:set_int("castlingWhiteR", 1)
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inv:set_list("board", {
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"realchess:rook_black_1",
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"realchess:knight_black_1",
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"realchess:bishop_black_1",
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"realchess:queen_black",
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"realchess:king_black",
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"realchess:bishop_black_2",
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"realchess:knight_black_2",
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"realchess:rook_black_2",
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"realchess:pawn_black_1",
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"realchess:pawn_black_2",
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"realchess:pawn_black_3",
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"realchess:pawn_black_4",
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"realchess:pawn_black_5",
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"realchess:pawn_black_6",
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"realchess:pawn_black_7",
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"realchess:pawn_black_8",
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"", "", "", "", "", "", "", "",
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"", "", "", "", "", "", "", "",
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"", "", "", "", "", "", "", "",
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"", "", "", "", "", "", "", "",
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"realchess:pawn_white_1",
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"realchess:pawn_white_2",
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"realchess:pawn_white_3",
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"realchess:pawn_white_4",
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"realchess:pawn_white_5",
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"realchess:pawn_white_6",
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"realchess:pawn_white_7",
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"realchess:pawn_white_8",
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"realchess:rook_white_1",
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"realchess:knight_white_1",
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"realchess:bishop_white_1",
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"realchess:queen_white",
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"realchess:king_white",
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"realchess:bishop_white_2",
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"realchess:knight_white_2",
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"realchess:rook_white_2"
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})
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end
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function realchess.move(pos, from_list, from_index, to_list, to_index, count, player)
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if from_list ~= "board" and to_list ~= "board" then
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return 0
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end
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local playerName = player:get_player_name()
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local meta = minetest.get_meta(pos)
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if meta:get_string("winner") ~= "" then
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minetest.chat_send_player(playerName, "This game is over.")
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return 0
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end
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local inv = meta:get_inventory()
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local pieceFrom = inv:get_stack(from_list, from_index):get_name()
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local pieceTo = inv:get_stack(to_list, to_index):get_name()
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local lastMove = meta:get_string("lastMove")
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local thisMove -- will replace lastMove when move is legal
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local playerWhite = meta:get_string("playerWhite")
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local playerBlack = meta:get_string("playerBlack")
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if pieceFrom:find("white") then
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if playerWhite ~= "" and playerWhite ~= playerName then
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minetest.chat_send_player(playerName, "Someone else plays white pieces!")
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return 0
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end
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if lastMove ~= "" and lastMove ~= "black" then
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minetest.chat_send_player(playerName, "It's not your turn, wait for your opponent to play.")
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return 0
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end
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if pieceTo:find("white") then
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-- Don't replace pieces of same color
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return 0
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end
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playerWhite = playerName
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thisMove = "white"
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elseif pieceFrom:find("black") then
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if playerBlack ~= "" and playerBlack ~= playerName then
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minetest.chat_send_player(playerName, "Someone else plays black pieces!")
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return 0
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end
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if lastMove ~= "" and lastMove ~= "white" then
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minetest.chat_send_player(playerName, "It's not your turn, wait for your opponent to play.")
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return 0
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end
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if pieceTo:find("black") then
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-- Don't replace pieces of same color
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return 0
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end
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playerBlack = playerName
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thisMove = "black"
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end
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-- DETERMINISTIC MOVING
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local from_x, from_y = index_to_xy(from_index)
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local to_x, to_y = index_to_xy(to_index)
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if pieceFrom:find("pawn") then
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if thisMove == "white" then
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-- white pawns can go up only
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if from_y - 1 == to_y then
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if from_x == to_x then
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if pieceTo ~= "" then
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return 0
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elseif to_index >= 1 and to_index <= 8 then
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inv:set_stack(from_list, from_index, "realchess:queen_white")
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end
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elseif from_x - 1 == to_x or from_x + 1 == to_x then
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if not pieceTo:find("black") then
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return 0
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elseif to_index >= 1 and to_index <= 8 then
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inv:set_stack(from_list, from_index, "realchess:queen_white")
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end
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else
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return 0
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end
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elseif from_y - 2 == to_y then
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if pieceTo ~= "" or from_y < 6 or inv:get_stack(from_list, xy_to_index(from_x, from_y - 1)):get_name() ~= "" then
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return 0
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end
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else
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return 0
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end
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elseif thisMove == "black" then
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-- black pawns can go down only
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if from_y + 1 == to_y then
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if from_x == to_x then
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if pieceTo ~= "" then
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return 0
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elseif to_index >= 57 and to_index <= 64 then
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inv:set_stack(from_list, from_index, "realchess:queen_black")
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end
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elseif from_x - 1 == to_x or from_x + 1 == to_x then
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if not pieceTo:find("white") then
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return 0
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elseif to_index >= 57 and to_index <= 64 then
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inv:set_stack(from_list, from_index, "realchess:queen_black")
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end
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else
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return 0
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end
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elseif from_y + 2 == to_y then
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if pieceTo ~= "" or from_y > 1 or inv:get_stack(from_list, xy_to_index(from_x, from_y + 1)):get_name() ~= "" then
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return 0
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end
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else
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return 0
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end
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-- if x not changed,
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-- ensure that destination cell is empty
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-- elseif x changed one unit left or right
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-- ensure the pawn is killing opponent piece
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-- else
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-- move is not legal - abort
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if from_x == to_x then
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if pieceTo ~= "" then
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return 0
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end
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elseif from_x - 1 == to_x or from_x + 1 == to_x then
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if not pieceTo:find("white") then
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return 0
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end
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else
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return 0
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end
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else
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return 0
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end
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elseif pieceFrom:find("rook") then
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if from_x == to_x then
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-- moving vertically
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if from_y < to_y then
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-- moving down
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-- ensure that no piece disturbs the way
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for i = from_y + 1, to_y - 1 do
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if inv:get_stack(from_list, xy_to_index(from_x, i)):get_name() ~= "" then
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return 0
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end
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end
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else
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-- mocing up
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-- ensure that no piece disturbs the way
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for i = to_y + 1, from_y - 1 do
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if inv:get_stack(from_list, xy_to_index(from_x, i)):get_name() ~= "" then
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return 0
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end
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end
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end
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elseif from_y == to_y then
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-- mocing horizontally
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if from_x < to_x then
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-- mocing right
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-- ensure that no piece disturbs the way
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for i = from_x + 1, to_x - 1 do
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if inv:get_stack(from_list, xy_to_index(i, from_y)):get_name() ~= "" then
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return 0
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end
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end
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else
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-- mocing left
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-- ensure that no piece disturbs the way
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for i = to_x + 1, from_x - 1 do
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if inv:get_stack(from_list, xy_to_index(i, from_y)):get_name() ~= "" then
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return 0
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end
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end
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end
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else
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-- attempt to move arbitrarily -> abort
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return 0
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end
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if thisMove == "white" then
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if pieceFrom:find("1") then
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meta:set_int("castlingWhiteL", 0)
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elseif pieceFrom:find("2") then
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meta:set_int("castlingWhiteR", 0)
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end
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elseif thisMove == "black" then
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if pieceFrom:find("1") then
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meta:set_int("castlingWhiteL", 0)
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elseif pieceFrom:find("2") then
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meta:set_int("castlingWhiteR", 0)
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end
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end
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elseif pieceFrom:find("knight") then
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-- get relative pos
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local dx = from_x - to_x
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local dy = from_y - to_y
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-- get absolute values
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if dx < 0 then
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dx = -dx
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end
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if dy < 0 then
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dy = -dy
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end
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-- sort x and y
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if dx > dy then
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dx, dy = dy, dx
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end
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-- ensure that dx == 1 and dy == 2
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if dx ~= 1 or dy ~= 2 then
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return 0
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end
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-- just ensure that destination cell does not contain friend piece
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-- ^ it was done already thus everything ok
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elseif pieceFrom:find("bishop") then
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-- get relative pos
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local dx = from_x - to_x
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local dy = from_y - to_y
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-- get absolute values
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if dx < 0 then
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dx = -dx
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end
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if dy < 0 then
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dy = -dy
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end
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-- ensure dx and dy are equal
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if dx ~= dy then
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return 0
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end
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if from_x < to_x then
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if from_y < to_y then
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-- moving right-down
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-- ensure that no piece disturbs the way
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for i = 1, dx - 1 do
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if inv:get_stack(from_list, xy_to_index(from_x + i, from_y + i)):get_name() ~= "" then
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return 0
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end
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end
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else
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-- moving right-up
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-- ensure that no piece disturbs the way
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for i = 1, dx - 1 do
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if inv:get_stack(from_list, xy_to_index(from_x + i, from_y - i)):get_name() ~= "" then
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return 0
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end
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end
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end
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else
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if from_y < to_y then
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-- moving left-down
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-- ensure that no piece disturbs the way
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for i = 1, dx - 1 do
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if inv:get_stack(from_list, xy_to_index(from_x - i, from_y + i)):get_name() ~= "" then
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return 0
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end
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end
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else
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-- moving left-up
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-- ensure that no piece disturbs the way
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for i = 1, dx - 1 do
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if inv:get_stack(from_list, xy_to_index(from_x - i, from_y - i)):get_name() ~= "" then
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return 0
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end
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end
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end
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end
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elseif pieceFrom:find("queen") then
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local dx = from_x - to_x
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local dy = from_y - to_y
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-- get absolute values
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if dx < 0 then
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dx = -dx
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end
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if dy < 0 then
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dy = -dy
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end
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-- ensure valid relative move
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if dx ~= 0 and dy ~= 0 and dx ~= dy then
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return 0
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end
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if from_x == to_x then
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if from_y < to_y then
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-- goes down
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-- ensure that no piece disturbs the way
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for i = 1, dx - 1 do
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if inv:get_stack(from_list, xy_to_index(from_x, from_y + i)):get_name() ~= "" then
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return 0
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end
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end
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else
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-- goes up
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-- ensure that no piece disturbs the way
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for i = 1, dx - 1 do
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if inv:get_stack(from_list, xy_to_index(from_x, from_y - i)):get_name() ~= "" then
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return 0
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end
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end
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end
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elseif from_x < to_x then
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if from_y == to_y then
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-- goes right
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-- ensure that no piece disturbs the way
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for i = 1, dx - 1 do
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if inv:get_stack(from_list, xy_to_index(from_x + i, from_y)):get_name() ~= "" then
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return 0
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end
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end
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elseif from_y < to_y then
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-- goes right-down
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-- ensure that no piece disturbs the way
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for i = 1, dx - 1 do
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if inv:get_stack(from_list, xy_to_index(from_x + i, from_y + i)):get_name() ~= "" then
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return 0
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end
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end
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else
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-- goes right-up
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-- ensure that no piece disturbs the way
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for i = 1, dx - 1 do
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if inv:get_stack(from_list, xy_to_index(from_x + i, from_y - i)):get_name() ~= "" then
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return 0
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end
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end
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end
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else
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if from_y == to_y then
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-- goes left
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-- ensure that no piece disturbs the way and destination cell does
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for i = 1, dx - 1 do
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if inv:get_stack(from_list, xy_to_index(from_x - i, from_y)):get_name() ~= "" then
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return 0
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end
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end
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elseif from_y < to_y then
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-- goes left-down
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-- ensure that no piece disturbs the way
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for i = 1, dx - 1 do
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if inv:get_stack(from_list, xy_to_index(from_x - i, from_y + i)):get_name() ~= "" then
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return 0
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end
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end
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else
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-- goes left-up
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-- ensure that no piece disturbs the way
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for i = 1, dx - 1 do
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if inv:get_stack(from_list, xy_to_index(from_x - i, from_y - i)):get_name() ~= "" then
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return 0
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end
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end
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end
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end
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elseif pieceFrom:find("king") then
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local dx = from_x - to_x
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local dy = from_y - to_y
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local check = true
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if thisMove == "white" then
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if from_y == 7 and to_y == 7 then
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if to_x == 1 then
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if meta:get_int("castlingWhiteL") == 1 and inv:get_stack(from_list, 57):get_name() == "realchess:rook_white_1" then
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for i = 58, from_index - 1 do
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if inv:get_stack(from_list, i):get_name() ~= "" then
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return 0
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end
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end
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inv:set_stack(from_list, 57, "")
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inv:set_stack(from_list, 59, "realchess:rook_white_1")
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check = false
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end
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elseif to_x == 6 then
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if meta:get_int("castlingWhiteR") == 1 and inv:get_stack(from_list, 64):get_name() == "realchess:rook_white_2" then
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for i = from_index + 1, 63 do
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if inv:get_stack(from_list, i):get_name() ~= "" then
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return 0
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end
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end
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inv:set_stack(from_list, 62, "realchess:rook_white_2")
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inv:set_stack(from_list, 64, "")
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check = false
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end
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end
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end
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elseif thisMove == "black" then
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if from_y == 0 and to_y == 0 then
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if to_x == 1 then
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if meta:get_int("castlingBlackL") == 1 and inv:get_stack(from_list, 1):get_name() == "realchess:rook_black_1" then
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for i = 2, from_index - 1 do
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if inv:get_stack(from_list, i):get_name() ~= "" then
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return 0
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end
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end
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inv:set_stack(from_list, 1, "")
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inv:set_stack(from_list, 3, "realchess:rook_black_1")
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check = false
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end
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elseif to_x == 6 then
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if meta:get_int("castlingBlackR") == 1 and inv:get_stack(from_list, 8):get_name() == "realchess:rook_black_2" then
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for i = from_index + 1, 7 do
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if inv:get_stack(from_list, i):get_name() ~= "" then
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return 0
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end
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end
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inv:set_stack(from_list, 6, "realchess:rook_black_2")
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inv:set_stack(from_list, 8, "")
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check = false
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end
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end
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end
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end
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if check then
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if dx < 0 then
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dx = -dx
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end
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if dy < 0 then
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dy = -dy
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end
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if dx > 1 or dy > 1 then
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return 0
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end
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end
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if thisMove == "white" then
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meta:set_int("castlingWhiteL", 0)
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meta:set_int("castlingWhiteR", 0)
|
|
elseif thisMove == "black" then
|
|
meta:set_int("castlingBlackL", 0)
|
|
meta:set_int("castlingBlackR", 0)
|
|
end
|
|
end
|
|
|
|
meta:set_string("playerWhite", playerWhite)
|
|
meta:set_string("playerBlack", playerBlack)
|
|
meta:set_string("lastMove", thisMove)
|
|
meta:set_int("lastMoveTime", minetest.get_gametime())
|
|
|
|
if meta:get_string("lastMove") == "black" then
|
|
minetest.chat_send_player(playerWhite, "["..os.date("%H:%M:%S").."] "..
|
|
playerName.." has moved a "..pieceFrom:match("%a+:(%a+)")..", it's now your turn.")
|
|
elseif meta:get_string("lastMove") == "white" then
|
|
minetest.chat_send_player(playerBlack, "["..os.date("%H:%M:%S").."] "..
|
|
playerName.." has moved a "..pieceFrom:match("%a+:(%a+)")..", it's now your turn.")
|
|
end
|
|
|
|
if pieceTo:find("king") then
|
|
minetest.chat_send_player(playerBlack, playerName.." won the game.")
|
|
minetest.chat_send_player(playerWhite, playerName.." won the game.")
|
|
meta:set_string("winner", thisMove)
|
|
end
|
|
|
|
return 1
|
|
end
|
|
|
|
local function timeout_format(timeout_limit)
|
|
local time_remaining = timeout_limit - minetest.get_gametime()
|
|
local minutes = math.floor(time_remaining / 60)
|
|
local seconds = time_remaining % 60
|
|
|
|
if minutes == 0 then return seconds.." sec." end
|
|
return minutes.." min. "..seconds.." sec."
|
|
end
|
|
|
|
function realchess.fields(pos, formname, fields, sender)
|
|
local playerName = sender:get_player_name()
|
|
local meta = minetest.get_meta(pos)
|
|
local timeout_limit = meta:get_int("lastMoveTime") + 300
|
|
if fields.quit then return end
|
|
|
|
-- timeout is 5 min. by default for resetting the game (non-players only)
|
|
if fields.new and (meta:get_string("playerWhite") == playerName or
|
|
meta:get_string("playerBlack") == playerName) then
|
|
realchess.init(pos)
|
|
elseif fields.new and meta:get_int("lastMoveTime") ~= 0 and
|
|
minetest.get_gametime() >= timeout_limit and
|
|
(meta:get_string("playerWhite") ~= playerName or
|
|
meta:get_string("playerBlack") ~= playerName) then
|
|
realchess.init(pos)
|
|
else
|
|
minetest.chat_send_player(playerName, "[!] You can't reset the chessboard, a game has been started.\n"..
|
|
"If you are not a current player, try again in "..timeout_format(timeout_limit))
|
|
end
|
|
end
|
|
|
|
function realchess.dig(pos, player)
|
|
local meta = minetest.get_meta(pos)
|
|
local playerName = player:get_player_name()
|
|
local timeout_limit = meta:get_int("lastMoveTime") + 300
|
|
|
|
-- timeout is 5 min. by default for digging the chessboard (non-players only)
|
|
if meta:get_int("lastMoveTime") ~= 0 and minetest.get_gametime() <= timeout_limit then
|
|
minetest.chat_send_player(playerName, "[!] You can't dig the chessboard, a game has been started.\n"..
|
|
"Reset it first if you're a current player, or dig again in "..timeout_format(timeout_limit))
|
|
return false
|
|
end
|
|
|
|
return true
|
|
end
|
|
|
|
function realchess.on_move(pos, from_list, from_index, to_list, to_index, count, player)
|
|
local inv = minetest.get_meta(pos):get_inventory()
|
|
inv:set_stack(from_list, from_index, '')
|
|
return false
|
|
end
|
|
|
|
function realchess.take(pos, listname, index, stack, player)
|
|
return 0
|
|
end
|
|
|
|
minetest.register_node(":realchess:chessboard", {
|
|
description = "Chess Board",
|
|
drawtype = "nodebox",
|
|
paramtype = "light",
|
|
paramtype2 = "facedir",
|
|
inventory_image = "chessboard_top.png",
|
|
wield_image = "chessboard_top.png",
|
|
tiles = {"chessboard_top.png", "chessboard_top.png", "chessboard_sides.png"},
|
|
groups = {choppy=3, oddly_breakable_by_hand=2, flammable=3},
|
|
sounds = default.node_sound_wood_defaults(),
|
|
node_box = {type = "fixed", fixed = {-.375, -.5, -.375, .375, -.4375, .375}},
|
|
sunlight_propagates = true,
|
|
on_rotate = screwdriver.rotate_simple,
|
|
can_dig = realchess.dig,
|
|
on_construct = realchess.init,
|
|
on_receive_fields = realchess.fields,
|
|
allow_metadata_inventory_move = realchess.move,
|
|
on_metadata_inventory_move = realchess.on_move,
|
|
allow_metadata_inventory_take = realchess.take
|
|
})
|
|
|
|
local function register_piece(name, count)
|
|
for _, color in pairs({"black", "white"}) do
|
|
if not count then
|
|
minetest.register_craftitem(":realchess:"..name.."_"..color, {
|
|
description = color:gsub("^%l", string.upper).." "..name:gsub("^%l", string.upper),
|
|
inventory_image = name.."_"..color..".png",
|
|
stack_max = 1,
|
|
groups = {not_in_creative_inventory=1}
|
|
})
|
|
else
|
|
for i = 1, count do
|
|
minetest.register_craftitem(":realchess:"..name.."_"..color.."_"..i, {
|
|
description = color:gsub("^%l", string.upper).." "..name:gsub("^%l", string.upper),
|
|
inventory_image = name.."_"..color..".png",
|
|
stack_max = 1,
|
|
groups = {not_in_creative_inventory=1}
|
|
})
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
register_piece("pawn", 8)
|
|
register_piece("rook", 2)
|
|
register_piece("knight", 2)
|
|
register_piece("bishop", 2)
|
|
register_piece("queen")
|
|
register_piece("king")
|
|
|
|
minetest.register_craft({
|
|
output = "realchess:chessboard",
|
|
recipe = {
|
|
{"dye:black", "dye:white", "dye:black"},
|
|
{"stairs:slab_wood", "stairs:slab_wood", "stairs:slab_wood"}
|
|
}
|
|
})
|
|
|