return x + y * 8 + 1
end
+local function get_square(a, b)
+ return (a * 8) - (8 - b)
+end
+
local chat_prefix = minetest.colorize("#FFFF00", "[Chess] ")
local letters = {'A','B','C','D','E','F','G','H'}
+local rowDirs = {-1, -1, -1, 0, 0, 1, 1, 1}
+local colDirs = {-1, 0, 1, -1, 1, -1, 0, 1}
+
+local bishopThreats = {true, false, true, false, false, true, false, true}
+local rookThreats = {false, true, false, true, true, false, true, false}
+local queenThreats = {true, true, true, true, true, true, true, true}
+local kingThreats = {true, true, true, true, true, true, true, true}
+
+local function king_attack(color, idx, inv)
+ local threatDetected = false
+ local kill = color == "white"
+ local pawnThreats = {kill, false, kill, false, false, not kill, false, not kill}
+
+ for dir = 1, 8 do
+ if not threatDetected then
+ local col, row = index_to_xy(idx)
+ col, row = col + 1, row + 1
+
+ for step = 1, 8 do
+ row = row + rowDirs[dir]
+ col = col + colDirs[dir]
+
+ if row >= 1 and row <= 8 and col >= 1 and col <= 8 then
+ local square = get_square(row, col)
+ local square_name = inv:get_stack("board", square):get_name()
+ local piece, pieceColor = square_name:match(":(%w+)_(%w+)")
+
+ if piece then
+ if pieceColor ~= color then
+ if piece == "bishop" and bishopThreats[dir] then
+ threatDetected = true
+ elseif piece == "rook" and rookThreats[dir] then
+ threatDetected = true
+ elseif piece == "queen" and queenThreats[dir] then
+ threatDetected = true
+ else
+ if step == 1 then
+ if piece == "pawn" and pawnThreats[dir] then
+ threatDetected = true
+ end
+ if piece == "king" and kingThreats[dir] then
+ threatDetected = true
+ end
+ end
+ end
+ end
+ break
+ end
+ end
+ end
+ end
+ end
+
+ return threatDetected
+end
+
+local function locate_kings(inv)
+ local Bidx, Widx
+ for i = 1, 64 do
+ local piece, color = inv:get_stack("board", i):get_name():match(":(%w+)_(%w+)")
+ if piece == "king" then
+ if color == "black" then
+ Bidx = i
+ else
+ Widx = i
+ end
+ end
+ end
+
+ return Bidx, Widx
+end
+
local pieces = {
"realchess:rook_black_1",
"realchess:knight_black_1",
]] .. "tablecolumns[image," .. pieces_str ..
";text;color;text;color;text;image," .. pieces_str .. "]"
+local function get_moves_list(meta, pieceFrom, pieceTo, pieceTo_s, from_x, to_x, from_y, to_y)
+ local moves = meta:get_string("moves")
+ local pieceFrom_s = pieceFrom:match(":(%w+_%w+)")
+ local pieceFrom_si_id = pieces_str:match("(%d+)=" .. pieceFrom_s)
+ local pieceTo_si_id = pieceTo_s ~= "" and pieces_str:match("(%d+)=" .. pieceTo_s) or ""
+
+ local coordFrom = letters[from_x + 1] .. math.abs(from_y - 8)
+ local coordTo = letters[to_x + 1] .. math.abs(to_y - 8)
+
+ local new_moves = pieceFrom_si_id .. "," ..
+ coordFrom .. "," ..
+ (pieceTo ~= "" and "#33FF33" or "#FFFFFF") .. ", > ,#FFFFFF," ..
+ coordTo .. "," ..
+ (pieceTo ~= "" and pieceTo_si_id or "69") .. "," ..
+ moves
+
+ meta:set_string("moves", new_moves)
+end
+
+local function get_eaten_list(meta, pieceTo, pieceTo_s)
+ local eaten = meta:get_string("eaten")
+ if pieceTo ~= "" then
+ eaten = eaten .. pieceTo_s .. ","
+ end
+
+ meta:set_string("eaten", eaten)
+
+ local eaten_t = string.split(eaten, ",")
+ local eaten_img = ""
+
+ local a, b = 0, 0
+ for i = 1, #eaten_t do
+ local is_white = eaten_t[i]:sub(-5,-1) == "white"
+ local X = (is_white and a or b) % 4
+ local Y = ((is_white and a or b) % 16 - X) / 4
+
+ if is_white then
+ a = a + 1
+ else
+ b = b + 1
+ end
+
+ eaten_img = eaten_img ..
+ "image[" .. ((X + (is_white and 11.7 or 8.8)) - (X * 0.45)) .. "," ..
+ ((Y + 5.56) - (Y * 0.2)) .. ";1,1;" .. eaten_t[i] .. ".png]"
+ end
+
+ meta:set_string("eaten_img", eaten_img)
+end
+
function realchess.init(pos)
local meta = minetest.get_meta(pos)
- local inv = meta:get_inventory()
+ local inv = meta:get_inventory()
meta:set_string("formspec", fs)
meta:set_string("infotext", "Chess Board")
meta:set_string("playerBlack", "")
meta:set_string("playerWhite", "")
- meta:set_string("lastMove", "")
- meta:set_string("winner", "")
+ meta:set_string("lastMove", "")
- meta:set_int("lastMoveTime", 0)
+ meta:set_int("lastMoveTime", 0)
meta:set_int("castlingBlackL", 1)
meta:set_int("castlingBlackR", 1)
meta:set_int("castlingWhiteL", 1)
return 0
end
- local playerName = player:get_player_name()
- local meta = minetest.get_meta(pos)
-
- if meta:get_string("winner") ~= "" then
- return 0
- end
-
- local inv = meta:get_inventory()
- local pieceFrom = inv:get_stack(from_list, from_index):get_name()
- local pieceTo = inv:get_stack(to_list, to_index):get_name()
- local lastMove = meta:get_string("lastMove")
- local thisMove -- will replace lastMove when move is legal
+ local meta = minetest.get_meta(pos)
+ local playerName = player:get_player_name()
+ local inv = meta:get_inventory()
+ local pieceFrom = inv:get_stack(from_list, from_index):get_name()
+ local pieceTo = inv:get_stack(to_list, to_index):get_name()
+ local lastMove = meta:get_string("lastMove")
local playerWhite = meta:get_string("playerWhite")
local playerBlack = meta:get_string("playerBlack")
+ local thisMove -- Will replace lastMove when move is legal
if pieceFrom:find("white") then
if playerWhite ~= "" and playerWhite ~= playerName then
minetest.chat_send_player(playerName, chat_prefix .. "Someone else plays white pieces!")
return 0
end
+
if lastMove ~= "" and lastMove ~= "black" then
return 0
end
+
if pieceTo:find("white") then
-- Don't replace pieces of same color
return 0
end
+
playerWhite = playerName
thisMove = "white"
+
elseif pieceFrom:find("black") then
if playerBlack ~= "" and playerBlack ~= playerName then
minetest.chat_send_player(playerName, chat_prefix .. "Someone else plays black pieces!")
return 0
end
+
if lastMove ~= "" and lastMove ~= "white" then
return 0
end
+
if pieceTo:find("black") then
-- Don't replace pieces of same color
return 0
end
+
playerBlack = playerName
thisMove = "black"
end
- -- DETERMINISTIC MOVING
+ -- MOVE LOGIC
local from_x, from_y = index_to_xy(from_index)
- local to_x, to_y = index_to_xy(to_index)
+ local to_x, to_y = index_to_xy(to_index)
+ -- PAWN
if pieceFrom:sub(11,14) == "pawn" then
if thisMove == "white" then
local pawnWhiteMove = inv:get_stack(from_list, xy_to_index(from_x, from_y - 1)):get_name()
return 0
end
- -- if x not changed,
- -- ensure that destination cell is empty
- -- elseif x changed one unit left or right
- -- ensure the pawn is killing opponent piece
- -- else
- -- move is not legal - abort
+ --[[
+ if x not changed
+ ensure that destination cell is empty
+ elseif x changed one unit left or right
+ ensure the pawn is killing opponent piece
+ else
+ move is not legal - abort
+ ]]
if from_x == to_x then
if pieceTo ~= "" then
return 0
end
- -- if x not changed,
- -- ensure that destination cell is empty
- -- elseif x changed one unit left or right
- -- ensure the pawn is killing opponent piece
- -- else
- -- move is not legal - abort
+ --[[
+ if x not changed
+ ensure that destination cell is empty
+ elseif x changed one unit left or right
+ ensure the pawn is killing opponent piece
+ else
+ move is not legal - abort
+ ]]
if from_x == to_x then
if pieceTo ~= "" then
return 0
end
+ -- ROOK
elseif pieceFrom:sub(11,14) == "rook" then
if from_x == to_x then
- -- moving vertically
+ -- Moving vertically
if from_y < to_y then
- -- moving down
- -- ensure that no piece disturbs the way
+ -- Moving down
+ -- Ensure that no piece disturbs the way
for i = from_y + 1, to_y - 1 do
if inv:get_stack(from_list, xy_to_index(from_x, i)):get_name() ~= "" then
return 0
end
end
else
- -- mocing up
- -- ensure that no piece disturbs the way
+ -- Mocing up
+ -- Ensure that no piece disturbs the way
for i = to_y + 1, from_y - 1 do
if inv:get_stack(from_list, xy_to_index(from_x, i)):get_name() ~= "" then
return 0
end
end
elseif from_y == to_y then
- -- mocing horizontally
+ -- Mocing horizontally
if from_x < to_x then
-- mocing right
-- ensure that no piece disturbs the way
end
end
else
- -- mocing left
- -- ensure that no piece disturbs the way
+ -- Mocing left
+ -- Ensure that no piece disturbs the way
for i = to_x + 1, from_x - 1 do
if inv:get_stack(from_list, xy_to_index(i, from_y)):get_name() ~= "" then
return 0
end
end
else
- -- attempt to move arbitrarily -> abort
+ -- Attempt to move arbitrarily -> abort
return 0
end
end
end
+ -- KNIGHT
elseif pieceFrom:sub(11,16) == "knight" then
- -- get relative pos
+ -- Get relative pos
local dx = from_x - to_x
local dy = from_y - to_y
- -- get absolute values
+ -- Get absolute values
if dx < 0 then dx = -dx end
if dy < 0 then dy = -dy end
- -- sort x and y
+ -- Sort x and y
if dx > dy then dx, dy = dy, dx end
- -- ensure that dx == 1 and dy == 2
+ -- Ensure that dx == 1 and dy == 2
if dx ~= 1 or dy ~= 2 then
return 0
end
- -- just ensure that destination cell does not contain friend piece
- -- ^ it was done already thus everything ok
+ -- Just ensure that destination cell does not contain friend piece
+ -- ^ It was done already thus everything ok
+ -- BISHOP
elseif pieceFrom:sub(11,16) == "bishop" then
- -- get relative pos
+ -- Get relative pos
local dx = from_x - to_x
local dy = from_y - to_y
- -- get absolute values
+ -- Get absolute values
if dx < 0 then dx = -dx 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 0 end
if from_x < to_x then
if from_y < to_y then
- -- moving right-down
- -- ensure that no piece disturbs the way
+ -- Moving right-down
+ -- Ensure that no piece disturbs the way
for i = 1, dx - 1 do
if inv:get_stack(from_list, xy_to_index(from_x + i, from_y + i)):get_name() ~= "" then
return 0
end
end
else
- -- moving right-up
- -- ensure that no piece disturbs the way
+ -- Moving right-up
+ -- Ensure that no piece disturbs the way
for i = 1, dx - 1 do
if inv:get_stack(from_list, xy_to_index(from_x + i, from_y - i)):get_name() ~= "" then
return 0
end
else
if from_y < to_y then
- -- moving left-down
- -- ensure that no piece disturbs the way
+ -- Moving left-down
+ -- Ensure that no piece disturbs the way
for i = 1, dx - 1 do
if inv:get_stack(from_list, xy_to_index(from_x - i, from_y + i)):get_name() ~= "" then
return 0
end
end
else
- -- moving left-up
+ -- Moving left-up
-- ensure that no piece disturbs the way
for i = 1, dx - 1 do
if inv:get_stack(from_list, xy_to_index(from_x - i, from_y - i)):get_name() ~= "" then
end
end
+ -- QUEEN
elseif pieceFrom:sub(11,15) == "queen" then
local dx = from_x - to_x
local dy = from_y - to_y
- -- get absolute values
+ -- Get absolute values
if dx < 0 then dx = -dx end
if dy < 0 then dy = -dy end
- -- ensure valid relative move
+ -- Ensure valid relative move
if dx ~= 0 and dy ~= 0 and dx ~= dy then
return 0
end
if from_x == to_x then
if from_y < to_y then
- -- goes down
- -- ensure that no piece disturbs the way
+ -- Goes down
+ -- Ensure that no piece disturbs the way
for i = 1, dx - 1 do
if inv:get_stack(from_list, xy_to_index(from_x, from_y + i)):get_name() ~= "" then
return 0
end
end
else
- -- goes up
- -- ensure that no piece disturbs the way
+ -- Goes up
+ -- Ensure that no piece disturbs the way
for i = 1, dx - 1 do
if inv:get_stack(from_list, xy_to_index(from_x, from_y - i)):get_name() ~= "" then
return 0
end
elseif from_x < to_x then
if from_y == to_y then
- -- goes right
- -- ensure that no piece disturbs the way
+ -- Goes right
+ -- Ensure that no piece disturbs the way
for i = 1, dx - 1 do
if inv:get_stack(from_list, xy_to_index(from_x + i, from_y)):get_name() ~= "" then
return 0
end
end
elseif from_y < to_y then
- -- goes right-down
- -- ensure that no piece disturbs the way
+ -- Goes right-down
+ -- Ensure that no piece disturbs the way
for i = 1, dx - 1 do
if inv:get_stack(from_list, xy_to_index(from_x + i, from_y + i)):get_name() ~= "" then
return 0
end
end
else
- -- goes right-up
- -- ensure that no piece disturbs the way
+ -- Goes right-up
+ -- Ensure that no piece disturbs the way
for i = 1, dx - 1 do
if inv:get_stack(from_list, xy_to_index(from_x + i, from_y - i)):get_name() ~= "" then
return 0
end
else
if from_y == to_y then
- -- goes left
- -- ensure that no piece disturbs the way and destination cell does
+ -- Goes left
+ -- Ensure that no piece disturbs the way and destination cell does
for i = 1, dx - 1 do
if inv:get_stack(from_list, xy_to_index(from_x - i, from_y)):get_name() ~= "" then
return 0
end
end
elseif from_y < to_y then
- -- goes left-down
- -- ensure that no piece disturbs the way
+ -- Goes left-down
+ -- Ensure that no piece disturbs the way
for i = 1, dx - 1 do
if inv:get_stack(from_list, xy_to_index(from_x - i, from_y + i)):get_name() ~= "" then
return 0
end
end
else
- -- goes left-up
- -- ensure that no piece disturbs the way
+ -- Goes left-up
+ -- Ensure that no piece disturbs the way
for i = 1, dx - 1 do
if inv:get_stack(from_list, xy_to_index(from_x - i, from_y - i)):get_name() ~= "" then
return 0
end
end
+ -- KING
elseif pieceFrom:sub(11,14) == "king" then
local dx = from_x - to_x
local dy = from_y - to_y
return 0
end
end
+
inv:set_stack(from_list, 1, "")
inv:set_stack(from_list, 3, "realchess:rook_black_1")
check = false
return 0
end
end
+
inv:set_stack(from_list, 6, "realchess:rook_black_2")
inv:set_stack(from_list, 8, "")
check = false
end
if check then
- if dx < 0 then dx = -dx end
- if dy < 0 then dy = -dy end
- if dx > 1 or dy > 1 then return 0 end
+ if dx < 0 then
+ dx = -dx
+ end
+
+ if dy < 0 then
+ dy = -dy
+ end
+
+ if dx > 1 or dy > 1 then
+ return 0
+ end
end
if thisMove == "white" then
meta:set_int("castlingWhiteL", 0)
meta:set_int("castlingWhiteR", 0)
+
+ local whiteAttacked = king_attack("white", to_index, inv)
+ if whiteAttacked then
+ return 0
+ end
+
elseif thisMove == "black" then
meta:set_int("castlingBlackL", 0)
meta:set_int("castlingBlackR", 0)
+
+ local blackAttacked = king_attack("black", to_index, inv)
+ if blackAttacked then
+ return 0
+ end
end
end
- meta:set_string("playerWhite", playerWhite)
- meta:set_string("playerBlack", playerBlack)
lastMove = thisMove
+
meta:set_string("lastMove", lastMove)
meta:set_int("lastMoveTime", minetest.get_gametime())
+ meta:set_string("playerWhite", playerWhite)
+ meta:set_string("playerBlack", playerBlack)
- if pieceTo:sub(11,14) == "king" then
- meta:set_string("winner", thisMove)
- end
-
- local moves = meta:get_string("moves")
- local pieceFrom_s = pieceFrom:match(":(%w+_%w+)")
- local pieceFrom_si_id = pieces_str:match("(%d+)=" .. pieceFrom_s)
- local pieceTo_s = pieceTo_s ~= "" and pieceTo:match(":(%w+_%w+)") or ""
- local pieceTo_si_id = pieceTo_s ~= "" and pieces_str:match("(%d+)=" .. pieceTo_s) or ""
-
- moves = pieceFrom_si_id .. "," ..
- letters[from_x + 1] .. (from_y + 1) .. "," ..
- (pieceTo ~= "" and "#33FF33" or "#FFFFFF") .. ", > ,#FFFFFF," ..
- letters[to_x + 1] .. (to_y + 1) .. "," ..
- (pieceTo ~= "" and pieceTo_si_id or "69") .. "," ..
- moves
-
- meta:set_string("moves", moves)
-
- local eaten = meta:get_string("eaten")
- if pieceTo ~= "" then
- eaten = eaten .. pieceTo_s .. ","
- end
-
- meta:set_string("eaten", eaten)
-
- local eaten_t = string.split(eaten, ",")
- local eaten_img = ""
-
- local a, b = 0, 0
- for i = 1, #eaten_t do
- local is_white = eaten_t[i]:sub(-5,-1) == "white"
- local X = (is_white and a or b) % 4
- local Y = ((is_white and a or b) % 16 - X) / 4
-
- if is_white then
- a = a + 1
- else
- b = b + 1
- end
-
- eaten_img = eaten_img ..
- "image[" .. ((X + (is_white and 11.7 or 8.8)) - (X * 0.45)) .. "," ..
- ((Y + 5.56) - (Y * 0.2)) .. ";1,1;" .. eaten_t[i] .. ".png]"
- end
-
- local black_win = lastMove == "black" and pieceTo:sub(11,14) == "king"
- local white_win = lastMove == "white" and pieceTo:sub(11,14) == "king"
-
- local formspec = fs ..
- "label[2,0.3;" .. (black_win and
- minetest.colorize("#00FF00", playerBlack .. " has win") or
- minetest.colorize("#000001",
- (lastMove == "white" and playerBlack ~= "" and not white_win) and
- playerBlack .. "..." or playerBlack)) .. "]" ..
- "label[2,9.15;" .. (white_win and
- minetest.colorize("#00FF00", playerWhite .. " has win") or
- minetest.colorize("#000001",
- (lastMove == "black" and playerWhite ~= "" and not black_win) and
- playerWhite .. "..." or playerWhite)) .. "]" ..
- "table[8.9,1.05;5.07,3.75;moves;" .. moves:sub(1,-2) .. ";1]" ..
- eaten_img
-
- meta:set_string("formspec", formspec)
+ local pieceTo_s = pieceTo ~= "" and pieceTo:match(":(%w+_%w+)") or ""
+ get_moves_list(meta, pieceFrom, pieceTo, pieceTo_s, from_x, to_x, from_y, to_y)
+ get_eaten_list(meta, pieceTo, pieceTo_s)
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
+ local minutes = math.floor(time_remaining / 60)
+ local seconds = time_remaining % 60
if minutes == 0 then
return seconds .. " sec."
end
function realchess.fields(pos, _, fields, sender)
- local playerName = sender:get_player_name()
- local meta = minetest.get_meta(pos)
+ local playerName = sender:get_player_name()
+ local meta = minetest.get_meta(pos)
local timeout_limit = meta:get_int("lastMoveTime") + 300
- local playerWhite = meta:get_string("playerWhite")
- local playerBlack = meta:get_string("playerBlack")
- local lastMoveTime = meta:get_int("lastMoveTime")
+ local playerWhite = meta:get_string("playerWhite")
+ local playerBlack = meta:get_string("playerBlack")
+ local lastMoveTime = meta:get_int("lastMoveTime")
if fields.quit then return end
- -- timeout is 5 min. by default for resetting the game (non-players only)
+ -- Timeout is 5 min. by default for resetting the game (non-players only)
if fields.new then
if (playerWhite == playerName or playerBlack == playerName) then
realchess.init(pos)
- else
- minetest.chat_send_player(playerName, chat_prefix ..
- "You can't reset the chessboard, a game has been started.\n" ..
- "If you are not a current player, try again in " ..
+
+ elseif lastMoveTime ~= 0 then
+ if minetest.get_gametime() >= timeout_limit and
+ (playerWhite ~= playerName or playerBlack ~= playerName) then
+ realchess.init(pos)
+ else
+ minetest.chat_send_player(playerName, chat_prefix ..
+ "You can't reset the chessboard, a game has been started. " ..
+ "If you aren't a current player, try again in " ..
timeout_format(timeout_limit))
+ end
end
end
-
- if fields.new and lastMoveTime ~= 0 and minetest.get_gametime() >= timeout_limit and
- (playerWhite ~= playerName or playerBlack ~= playerName) then
- realchess.init(pos)
- end
end
function realchess.dig(pos, player)
return false
end
- local meta = minetest.get_meta(pos)
- local playerName = player:get_player_name()
+ local meta = minetest.get_meta(pos)
+ local playerName = player:get_player_name()
local timeout_limit = meta:get_int("lastMoveTime") + 300
- local lastMoveTime = meta:get_int("lastMoveTime")
+ local lastMoveTime = meta:get_int("lastMoveTime")
- -- timeout is 5 min. by default for digging the chessboard (non-players only)
+ -- Timeout is 5 min. by default for digging the chessboard (non-players only)
return (lastMoveTime == 0 and minetest.get_gametime() > timeout_limit) or
minetest.chat_send_player(playerName, chat_prefix ..
- "You can't dig the chessboard, a game has been started.\n" ..
+ "You can't dig the chessboard, a game has been started. " ..
"Reset it first if you're a current player, or dig it again in " ..
timeout_format(timeout_limit))
end
function realchess.on_move(pos, from_list, from_index)
- local inv = minetest.get_meta(pos):get_inventory()
+ local meta = minetest.get_meta(pos)
+ local inv = minetest.get_meta(pos):get_inventory()
inv:set_stack(from_list, from_index, '')
+
+ local black_king_idx, white_king_idx = locate_kings(inv)
+ local black_king_attacked = king_attack("black", black_king_idx, inv)
+ local white_king_attacked = king_attack("white", white_king_idx, inv)
+
+ local playerWhite = meta:get_string("playerWhite")
+ local playerBlack = meta:get_string("playerBlack")
+
+ local moves = meta:get_string("moves")
+ local eaten_img = meta:get_string("eaten_img")
+ local lastMove = meta:get_string("lastMove")
+ local turnBlack = minetest.colorize("#000001", (lastMove == "white" and playerBlack ~= "") and
+ playerBlack .. "..." or playerBlack)
+ local turnWhite = minetest.colorize("#000001", (lastMove == "black" and playerWhite ~= "") and
+ playerWhite .. "..." or playerWhite)
+ local check_s = minetest.colorize("#FF0000", "\\[check\\]")
+
+ local formspec = fs ..
+ "label[1.9,0.3;" .. turnBlack .. (black_king_attacked and " " .. check_s or "") .. "]" ..
+ "label[1.9,9.15;" .. turnWhite .. (white_king_attacked and " " .. check_s or "") .. "]" ..
+ "table[8.9,1.05;5.07,3.75;moves;" .. moves:sub(1,-2) .. ";1]" ..
+ eaten_img
+
+ meta:set_string("formspec", formspec)
+
return false
end
projects / xdecor.git / commitdiff