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game.cpp
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game.cpp
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/*
* Quackle -- Crossword game artificial intelligence and analysis tool
* Copyright (C) 2005-2006 Jason Katz-Brown and John O'Laughlin.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#include <iostream>
#include <sstream>
#include "computerplayer.h"
#include "datamanager.h"
#include "enumerator.h"
#include "evaluator.h"
#include "gameparameters.h"
#include "game.h"
#include "generator.h"
// define this to get warnings when there's a problem bag
#define DEBUG_BAG
using namespace Quackle;
Game::Game()
: m_defaultComputerPlayer(0)
{
reset();
}
Game::~Game()
{
}
void Game::reset()
{
m_positions.clear();
m_title = UVString();
m_description = UVString();
PlayerList dummyPlayers;
dummyPlayers.push_back(Player(MARK_UV("Dummy"), Quackle::Player::HumanPlayerType, 0));
setPlayers(dummyPlayers);
}
void Game::setPlayers(const PlayerList &list)
{
PlayerList idedPlayers(list);
const PlayerList::iterator end(idedPlayers.end());
int i = 0;
for (PlayerList::iterator it = idedPlayers.begin(); it != end; ++it, ++i)
(*it).setId(i);
m_positions.setPlayers(idedPlayers);
}
void Game::addPosition()
{
addClonePosition();
m_positions.lastPosition().incrementTurn();
m_positions.setCurrentLocation(m_positions.lastLocation());
// start with move list afresh
m_positions.lastPosition().removeAllMoves();
// don't reset if game is over as increment might
// have set the move made to be an unused tile bonus
if (!m_positions.lastPosition().gameOver())
resetCandidature();
}
void Game::addClonePosition()
{
m_positions.eraseAfter(m_positions.currentLocation());
if (m_positions.empty())
m_positions.push_back(GamePosition(m_positions.players()));
else
m_positions.push_back(m_positions.lastPosition());
}
void Game::setCurrentPosition(const GamePosition &position)
{
currentPosition() = position;
setCurrentPosition(position.location());
}
void Game::associateComputerPlayer(int playerId, ComputerPlayer *computerPlayer)
{
m_computerPlayers[playerId] = computerPlayer;
}
void Game::associateKnownComputerPlayers()
{
const PlayerList::const_iterator end(m_positions.players().end());
for (PlayerList::const_iterator it = m_positions.players().begin(); it != end; ++it)
{
if ((*it).type() == Player::ComputerPlayerType)
{
ComputerPlayer *computerPlayer = (*it).computerPlayer();
if (computerPlayer)
associateComputerPlayer((*it).id(), computerPlayer);
}
}
}
ComputerPlayer *Game::computerPlayer(int playerId)
{
if (m_computerPlayers.find(playerId) == m_computerPlayers.end())
return defaultComputerPlayer();
return m_computerPlayers[playerId];
}
void Game::setDefaultComputerPlayer(ComputerPlayer *computerPlayer)
{
m_defaultComputerPlayer = computerPlayer;
}
ComputerPlayer *Game::defaultComputerPlayer()
{
if (m_defaultComputerPlayer)
return m_defaultComputerPlayer;
m_defaultComputerPlayer = new StaticPlayer;
return m_defaultComputerPlayer;
}
Move Game::haveComputerPlay(ComputerPlayer *computerPlayer)
{
if (currentPosition().gameOver())
return Move::createNonmove();
if (!computerPlayer)
computerPlayer = this->computerPlayer(currentPosition().currentPlayer().id());
computerPlayer->setPosition(currentPosition());
Move move(computerPlayer->move());
commitMove(move);
return move;
}
void Game::advanceToNoncomputerPlayer()
{
while (!currentPosition().gameOver() && currentPosition().currentPlayer().type() == Player::ComputerPlayerType)
haveComputerPlay();
}
void Game::commitCandidate(bool maintainBoard)
{
if (currentPosition().gameOver())
return;
currentPosition().prepareForCommit();
Move moveMade(currentPosition().moveMade());
addPosition();
// Note this comes after addPosition --
// ensuring exchanged tiles can't be drawn.
// TODO how does this ensure that exchanged tiles can't be drawn?
currentPosition().makeMove(moveMade, maintainBoard);
}
void Game::commitMove(const Move &move)
{
setCandidate(move);
commitCandidate();
}
///////////
GamePosition::GamePosition(const PlayerList &players)
: m_players(players), m_currentPlayer(m_players.end()), m_playerOnTurn(m_players.end()), m_turnNumber(0), m_nestedness(0), m_scorelessTurnsInARow(0), m_gameOver(false)
{
setEmptyBoard();
resetMoveMade();
resetBag();
}
GamePosition::GamePosition(const GamePosition &position)
: m_players(position.m_players), m_moves(position.m_moves), m_moveMade(position.m_moveMade), m_committedMove(position.m_committedMove), m_turnNumber(position.m_turnNumber), m_nestedness(position.m_nestedness), m_scorelessTurnsInARow(position.m_scorelessTurnsInARow), m_gameOver(position.m_gameOver), m_board(position.m_board), m_bag(position.m_bag), m_drawingOrder(position.m_drawingOrder), m_explanatoryNote(position.m_explanatoryNote)
{
// reset iterator
if (position.turnNumber() == 0)
{
m_currentPlayer = m_players.end();
m_playerOnTurn = m_players.end();
}
else
{
setCurrentPlayer(position.currentPlayer().id());
setPlayerOnTurn(position.currentPlayer().id());
}
}
const GamePosition &GamePosition::operator=(const GamePosition &position)
{
m_players = position.m_players;
m_moves = position.m_moves;
m_moveMade = position.m_moveMade;
m_committedMove = position.m_committedMove;
m_turnNumber = position.m_turnNumber;
m_nestedness = position.m_nestedness;
m_scorelessTurnsInARow = position.m_scorelessTurnsInARow;
m_gameOver = position.m_gameOver;
m_board = position.m_board;
m_bag = position.m_bag;
m_drawingOrder = position.m_drawingOrder;
m_explanatoryNote = position.m_explanatoryNote;
// reset iterator
if (position.turnNumber() == 0)
{
m_currentPlayer = m_players.end();
m_playerOnTurn = m_players.end();
}
else
{
setCurrentPlayer(position.currentPlayer().id());
setPlayerOnTurn(position.currentPlayer().id());
}
return *this;
}
GamePosition::GamePosition()
: m_currentPlayer(m_players.end()), m_playerOnTurn(m_players.end()), m_turnNumber(0), m_nestedness(0), m_gameOver(false)
{
setEmptyBoard();
resetMoveMade();
resetBag();
}
void GamePosition::kibitz(int nmoves)
{
Generator generator(*this);
generator.kibitz(nmoves, exchangeAllowed()? Generator::RegularKibitz : Generator::CannotExchange);
m_moves = generator.kibitzList();
const MoveList::iterator end(m_moves.end());
for (MoveList::iterator it = m_moves.begin(); it != end; ++it)
ensureMovePrettiness(*it);
}
const Move &GamePosition::staticBestMove()
{
kibitz(1);
return m_moves.back();
}
void GamePosition::removeMove(const Quackle::Move &move)
{
const MoveList::iterator end(m_moves.end());
for (MoveList::iterator it = m_moves.begin(); it != end; ++it)
{
if ((*it) == move)
{
m_moves.erase(it);
break;
}
}
}
void GamePosition::removeAllMoves()
{
m_moves.clear();
}
void GamePosition::ensureMovePrettiness(Move &move)
{
if (move.prettyTiles().empty())
move.setPrettyTiles(m_board.prettyTilesOfMove(move));
}
void GamePosition::ensureMoveTilesDoNotIncludePlayThru(Move &move)
{
move.setTiles(m_board.sanitizedTilesOfMove(move));
}
void GamePosition::addMove(const Move &move)
{
if (move.isAMove())
{
Move prettifiedMove(move);
ensureMoveTilesDoNotIncludePlayThru(prettifiedMove);
ensureMovePrettiness(prettifiedMove);
m_moves.push_back(prettifiedMove);
MoveList::sort(m_moves, MoveList::Win);
}
}
void GamePosition::makeSureMoveListContainsMoves(const MoveList &moves)
{
for (MoveList::const_iterator it = moves.begin(); it != moves.end(); ++it)
if (!m_moves.contains(*it))
addMove(*it);
}
void GamePosition::kibitzAs(ComputerPlayer *computerPlayer, int nmoves)
{
computerPlayer->setPosition(*this);
setMoves(computerPlayer->moves(nmoves));
}
void GamePosition::addAndSetMoveMade(const Move &move)
{
addMove(move);
setMoveMade(move);
}
int GamePosition::validateMove(const Move &move) const
{
int ret = ValidMove;
switch (move.action)
{
case Move::Place:
case Move::Exchange:
if (!currentPlayer().rack().contains(move.usedTiles()))
ret |= InvalidTiles;
if (move.action == Move::Place)
{
// Place action -- ensure the word connects to others
if (!isConnected(move))
ret |= InvalidPlace;
if (m_board.isUnacceptableOpeningMove(move))
ret |= InvalidOpeningPlace;
// check if the word is acceptable
if (!formsAcceptableWords(move))
ret |= UnacceptableWord;
}
else
{
// Exchange action -- ensure there are enough tiles in bag
if (!exchangeAllowed())
ret |= TooLateExchange;
}
break;
case Move::UnusedTilesBonus:
case Move::TimePenalty:
ret = InvalidAction;
break;
case Move::Pass:
case Move::Nonmove:
break;
}
return ret;
}
bool GamePosition::isConnected(const Move &move) const
{
return m_board.isConnected(move);
}
bool GamePosition::formsAcceptableWords(const Move &move) const
{
vector<Move> words = m_board.allWordsFormedBy(move);
for (vector<Move>::const_iterator it = words.begin(); it != words.end(); ++it)
{
if (!isAcceptableWord((*it).wordTiles()))
return false;
}
return true;
}
bool GamePosition::isAcceptableWord(const LetterString &word) const
{
Generator generator;
return generator.isAcceptableWord(word);
}
bool GamePosition::exchangeAllowed() const
{
return m_bag.size() >= QUACKLE_PARAMETERS->minimumTilesForExchange();
}
int GamePosition::handleOverdraw(const LetterString &letters, LetterString *throwback) const
{
if (!unseenBag().removeLetters(letters))
return OverdrawnTilesNotUnseen;
if (letters.size() <= QUACKLE_PARAMETERS->overdrawPenalty())
return InvalidOverdrawNumber;
ProbableRackList racks;
Bag bag(letters);
Enumerator enumerator(bag);
enumerator.enumerate(&racks, QUACKLE_PARAMETERS->overdrawPenalty());
double minimumLeaveValue = 99999;
for (ProbableRackList::const_iterator it = racks.begin(); it != racks.end(); ++it)
{
double value = leaveValue((*it).rack.tiles());
if (value < minimumLeaveValue)
{
Rack rack(letters);
rack.unload((*it).rack.tiles());
*throwback = (Rack(letters) - (*it).rack).tiles();
minimumLeaveValue = value;
}
}
return ValidOverdraw;
}
void GamePosition::makeMove(const Move &move, bool maintainBoard)
{
if (!move.isChallengedPhoney())
{
Generator generator(*this);
generator.makeMove(move, maintainBoard);
m_board = generator.position().board();
}
if (move.action == Move::Exchange)
m_bag.toss(move.usedTiles());
}
void GamePosition::scoreMove(Move &move)
{
move.score = calculateScore(move);
move.equity = calculateEquity(move);
}
void GamePosition::ensureBoardIsPreparedForAnalysis()
{
Generator generator(*this);
generator.allCrosses();
m_board = generator.position().board();
}
int GamePosition::calculateScore(const Move &move)
{
return m_board.score(move);
}
double GamePosition::calculateEquity(const Move &move)
{
return QUACKLE_EVALUATOR->equity(*this, move);
}
double GamePosition::calculatePlayerConsideration(const Move &move)
{
return QUACKLE_EVALUATOR->playerConsideration(*this, move);
}
double GamePosition::leaveValue(const LetterString &leave) const
{
return QUACKLE_EVALUATOR->leaveValue(leave);
}
double GamePosition::calculateSharedConsideration(const Move &move)
{
return QUACKLE_EVALUATOR->sharedConsideration(*this, move);
}
Bag GamePosition::unseenBag() const
{
return unseenBagFromPlayerPerspective(currentPlayer());
}
Bag GamePosition::unseenBagFromPlayerPerspective(const Player &player) const
{
// one way:
//Bag ret(m_board.tilesNotOnBoard());
//ret.removeLetters(currentPlayer().rack().usedTiles());
// other way:
Bag ret(m_bag);
const PlayerList::const_iterator end(m_players.end());
for (PlayerList::const_iterator it = m_players.begin(); it != end; ++it)
{
if (!((*it) == player))
{
ret.toss((*it).rack());
}
}
return ret;
}
void GamePosition::ensureProperBag() const
{
#ifdef DEBUG_BAG
Bag allTiles(m_board.tilesOnBoard());
UVString debugString;
Bag racks;
racks.clear();
const PlayerList::const_iterator end(m_players.end());
for (PlayerList::const_iterator it = m_players.begin(); it != end; ++it)
{
allTiles.toss((*it).rack());
racks.toss((*it).rack());
}
allTiles.toss(m_bag.shuffledTiles());
Bag fullDistribution;
bool mismatch = false;
char allTilesCounts[QUACKLE_FIRST_LETTER + QUACKLE_MAXIMUM_ALPHABET_SIZE];
char fullCounts[QUACKLE_FIRST_LETTER + QUACKLE_MAXIMUM_ALPHABET_SIZE];
allTiles.letterCounts(allTilesCounts);
fullDistribution.letterCounts(fullCounts);
for (Letter letter = 0; letter <= QUACKLE_ALPHABET_PARAMETERS->lastLetter(); ++letter)
{
if (allTilesCounts[(int)(letter)] != fullCounts[(int)(letter)])
{
mismatch = true;
if (debugString.empty()) {
debugString += MARK_UV("-------------------------\n");
debugString += MARK_UV("tiles on board: ");
debugString += m_board.tilesOnBoard().toString() + MARK_UV("\n");
debugString += MARK_UV("racks: ") + racks.toString() + MARK_UV("\n");
debugString += MARK_UV("bag: ") + m_bag.toString() + MARK_UV("\n");
debugString += MARK_UV("All tiles: ") + allTiles.toString() + MARK_UV("\n");
}
debugString += MARK_UV("Letter doesn't match: ") + QUACKLE_ALPHABET_PARAMETERS->userVisible(letter) + MARK_UV("\n");
}
}
if (mismatch)
{
UVcout << "********* PROBLEM PROBLEM *********" << endl;
UVcout << debugString;
UVcout << "-------------------------" << endl;
}
#endif
}
void GamePosition::setEmptyBoard()
{
m_board.prepareEmptyBoard();
}
const Player &GamePosition::humanPlayer() const
{
if (currentPlayer().type() == Player::HumanPlayerType)
return currentPlayer();
bool found;
return *nextPlayerOfType(Player::HumanPlayerType, found);
}
void GamePosition::replenishAndSetRack(const Rack &previousRack, Player &player)
{
#ifdef VERBOSE_DEBUG_BAG
UVcout << "replenishAndSetRack(" << previousRack << ", " << player << ")" << endl;
#endif
Rack newRack(previousRack);
#ifdef VERBOSE_DEBUG_BAG
UVcout << "(Before refill) " << m_bag << endl;
#endif
if (m_drawingOrder.empty())
m_bag.refill(newRack);
else
m_drawingOrder = m_bag.refill(newRack, m_drawingOrder);
player.setRack(newRack);
player.setDrawnLetters(newRack - previousRack);
#ifdef VERBOSE_DEBUG_BAG
UVcout << "(After refill) " << m_bag << endl;
UVcout << "Rack refilled to " << newRack << endl;
#endif
}
void GamePosition::setCurrentPlayerRack(const Rack &rack, bool adjustBag)
{
setPlayerRack(currentPlayer().id(), rack, adjustBag);
}
UVString GamePosition::nestednessIndentation() const
{
UVString ret;
for (unsigned int i = 0; i < m_nestedness; ++i)
ret += MARK_UV("\t");
return ret;
}
void GamePosition::setOppRack(const Rack &rack, bool adjustBag)
{
int oppID;
const PlayerList::iterator end(m_players.end());
for (PlayerList::iterator it = m_players.begin(); it != end; ++it)
if ((*it).id() != currentPlayer().id())
{
m_bag.toss((*it).rack());
(*it).setRack(Rack(""));
oppID = (*it).id();
setPlayerRack(oppID, rack, adjustBag);
return;
}
}
// TODO(jasonkb): this function is poorly implemented. Also it should return a reference.
Rack GamePosition::oppRack()
{
UVcout << "currentPlayer(): " << currentPlayer() << endl;
const PlayerList::iterator end(m_players.end());
for (PlayerList::iterator it = m_players.begin(); it != end; ++it)
UVcout << "rack " << *it << " " << (*it).rack() << endl;
for (PlayerList::iterator it = m_players.begin(); it != end; ++it)
{
if ((*it).id() != currentPlayer().id())
{
return (*it).rack();
}
}
return Rack();
}
void GamePosition::setPlayerRack(int playerID, const Rack &rack, bool adjustBag)
{
const PlayerList::iterator end(m_players.end());
for (PlayerList::iterator it = m_players.begin(); it != end; ++it)
{
if ((*it).id() == playerID)
{
// restore bag
if (adjustBag)
{
// please be correct code
m_bag.toss((*it).rack() - rack);
removeLetters((rack - (*it).rack()).tiles());
}
(*it).setRack(rack);
}
}
}
bool GamePosition::canSetCurrentPlayerRackWithoutBagExpansion(const Rack &rack) const
{
return canSetPlayerRackWithoutBagExpansion(currentPlayer().id(), rack);
}
bool GamePosition::canSetPlayerRackWithoutBagExpansion(int playerID, const Rack &rack) const
{
(void) playerID;
Bag someTiles(m_bag);
const PlayerList::const_iterator end(m_players.end());
for (PlayerList::const_iterator it = m_players.begin(); it != end; ++it)
someTiles.toss((*it).rack());
// Now we have a bag with all tiles not on the board
return someTiles.removeLetters(rack.tiles());
}
bool GamePosition::setCurrentPlayer(int playerID)
{
const PlayerList::iterator end(m_players.end());
for (PlayerList::iterator it = m_players.begin(); it != end; ++it)
{
if ((*it).id() == playerID)
{
m_currentPlayer = it;
return true;
}
}
m_currentPlayer = m_players.begin();
return false;
}
bool GamePosition::setPlayerOnTurn(int playerID)
{
const PlayerList::iterator end(m_players.end());
for (PlayerList::iterator it = m_players.begin(); it != end; ++it)
{
if ((*it).id() == playerID)
{
m_playerOnTurn = it;
return true;
}
}
m_playerOnTurn = m_players.begin();
return false;
}
void GamePosition::prepareForCommit()
{
setCommittedMove(moveMade());
}
Board GamePosition::boardAfterMoveMade() const
{
Board ret(m_board);
ret.makeMove(m_moveMade);
return ret;
}
void GamePosition::resetMoveMade()
{
m_moveMade = Move::createNonmove();
m_committedMove = Move::createNonmove();
}
void GamePosition::resetBag()
{
m_bag.prepareFullBag();
}
bool GamePosition::incrementTurn()
{
if (gameOver() || m_players.empty())
return false;
PlayerList::iterator previousCurrentPlayer(m_currentPlayer);
bool ret = false;
// if current player is players.end(), we haven't started game
// and go to first player after incrementing
if (m_currentPlayer != m_players.end())
{
Rack remainingRack(currentPlayer().rack() - m_moveMade);
Rack moveTiles(m_moveMade.usedTiles());
moveTiles.unload(currentPlayer().rack().tiles());
// now moveTiles is the tiles that are in play but not on rack
removeLetters(moveTiles.tiles());
// update our current player's score before possibly
// adding endgame bonuses
currentPlayer().addToScore(m_moveMade.effectiveScore());
// player played out
if (m_bag.empty() && remainingRack.empty())
{
// magic!
++m_turnNumber;
if (!m_gameOver)
{
// we become over based on player playing out
// with empty bag
adjustScoresToFinishGame();
m_gameOver = true;
}
}
if ((m_moveMade.action == Move::Place && m_moveMade.effectiveScore() == 0) || m_moveMade.action == Move::Exchange || m_moveMade.action == Move::Pass)
++m_scorelessTurnsInARow;
else
m_scorelessTurnsInARow = 0;
if (!m_gameOver)
{
if (QUACKLE_PARAMETERS->numberOfScorelessTurnsThatEndsGame() >= 0 && m_scorelessTurnsInARow >= QUACKLE_PARAMETERS->numberOfScorelessTurnsThatEndsGame() && !m_board.isEmpty())
{
// magic!
++m_turnNumber;
adjustScoresToFinishPassedOutGame();
m_gameOver = true;
}
}
// refill rack of player that just played
replenishAndSetRack(remainingRack);
// now move onto next player
++m_currentPlayer;
}
if (m_currentPlayer == m_players.end())
{
++m_turnNumber;
m_currentPlayer = m_players.begin();
ret = true;
}
// ensure players get a rack at the beginning of the game,
// and that the first player draws first (even though yes
// olaugh I realize that it doesn't matter :-)
if (currentPlayer().rack().empty())
replenishAndSetRack(currentPlayer().rack());
// refill rack of any player whose rack is empty (again for
// beginning of game)
const PlayerList::iterator end(m_players.end());
for (PlayerList::iterator it = m_players.begin(); it != end; ++it)
if ((*it).rack().empty())
replenishAndSetRack((*it).rack(), *it);
// freeze current player as last person who played out
if (gameOver())
m_currentPlayer = previousCurrentPlayer;
m_playerOnTurn = m_currentPlayer;
// kill drawing order
m_drawingOrder = LetterString();
// reset note to a clean slate
m_explanatoryNote = UVString();
return ret;
}
bool GamePosition::removeLetters(const LetterString &letters)
{
bool ret = true;
const LetterString::const_iterator end(letters.end());
for (LetterString::const_iterator it = letters.begin(); it != end; ++it)
{
#ifdef VERBOSE_DEBUG_BAG
UVcout << "removeLetters processing " << QUACKLE_ALPHABET_PARAMETERS->userVisible(*it) << endl;
#endif
const bool removedFromBag = m_bag.removeLetter(*it);
if (removedFromBag)
{
#ifdef VERBOSE_DEBUG_BAG
UVcout << "removed from bag" << endl;
#endif
}
else
{
bool removedFromPlayer = false;
const PlayerList::iterator playersEnd(m_players.end());
for (PlayerList::iterator playerIt = m_players.begin(); playerIt != playersEnd; ++playerIt)
{
if (*playerIt == currentPlayer())
continue;
LetterString letterString;
letterString += (*it);
Rack newRack((*playerIt).rack());
removedFromPlayer = newRack.unload(letterString);
if (removedFromPlayer)
{
replenishAndSetRack(newRack, *playerIt);
break;
}
}
if (removedFromPlayer)
{
#ifdef VERBOSE_DEBUG_BAG
UVcout << "removed from player" << endl;
#endif
}
else
{
#ifdef VERBOSE_DEBUG_BAG
UVcout << "couldn't find any place to remove " << QUACKLE_ALPHABET_PARAMETERS->userVisible(*it) << " from!" << endl;
#endif
ret = false;
}
}
}
return ret;
}
PlayerList::const_iterator GamePosition::nextPlayer() const
{
PlayerList::const_iterator ret = m_currentPlayer;
ret++;
if (ret == m_players.end())
ret = m_players.begin();
return ret;
}
PlayerList::const_iterator GamePosition::playerWithId(int id, bool &found) const
{
PlayerList::const_iterator it = m_currentPlayer;
for (++it; ; ++it)
{
if (it == m_players.end())
it = m_players.begin();
if ((*it).id() == id)
{
found = true;
return it;
}
if (it == m_currentPlayer)
{
found = false;
return it;
}
}
}
PlayerList::const_iterator GamePosition::nextPlayerOfType(Player::PlayerType type, bool &found) const
{
PlayerList::const_iterator ret = m_currentPlayer;
++ret;
while (true)
{
if (ret == m_players.end())
ret = m_players.begin();
if ((*ret).type() == type)
break;
if (ret == m_currentPlayer)
{
found = false;
break;
}
++ret;
}
found = true;
return ret;
}
PlayerList GamePosition::endgameAdjustedScores() const
{
PlayerList ret;
const PlayerList::const_iterator end(m_players.end());
for (PlayerList::const_iterator it = m_players.begin(); it != end; ++it)
{
Player adjustedPlayer(*it);
if (gameOver() && adjustedPlayer == currentPlayer())
{
adjustedPlayer.addToScore(m_moveMade.effectiveScore());
}
ret.push_back(adjustedPlayer);
}
return ret;
}
PlayerList GamePosition::leadingPlayers() const
{
PlayerList ret;
PlayerList players(endgameAdjustedScores());
for (PlayerList::const_iterator it = players.begin(); it != players.end(); ++it)
{
if (!ret.empty() && (*it).score() > ret.back().score())
ret.clear();
if (ret.empty() || (*it).score() >= ret.back().score())
ret.push_back(*it);
}
return ret;
}
int GamePosition::spread(int playerID) const
{
int nextBest = 0;
int currentPlayerScore = 0;
PlayerList players(endgameAdjustedScores());
for (PlayerList::const_iterator it = players.begin(); it != players.end(); ++it)
{
if ((*it).id() == playerID)