/****************************************************************************
Copyright (C) 2002-2008 Gilles Debunne. All rights reserved.
This file is part of the QGLViewer library version 2.3.1.
http://www.libqglviewer.com - contact@libqglviewer.com
This file may be used under the terms of the GNU General Public License
versions 2.0 or 3.0 as published by the Free Software Foundation and
appearing in the LICENSE file included in the packaging of this file.
In addition, as a special exception, Gilles Debunne gives you certain
additional rights, described in the file GPL_EXCEPTION in this package.
libQGLViewer uses dual licensing. Commercial/proprietary software must
purchase a libQGLViewer Commercial License.
This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*****************************************************************************/
#include "board.h"
#include <qmessagebox.h>
bool Board::canBeSelected(int i)
{
QPoint p = pointFromInt(i);
return (isValid(p) && (stateOf(p) == Board::blueColor(bluePlays())) && (pieceCanMove(p)));
}
bool Board::isValid(const QPoint& p) const
{
return ((p.x() >= 0) && (p.y() >= 0) && (p.x() < sizeX_) && (p.y() < sizeY_) && (stateOf(p) != HOLE));
}
void Board::play(const Move& m)
{
if (!m.isValid(this))
{
QMessageBox::critical(NULL, "Invalid move", "Invalid move");
return;
}
if (!m.isClose())
setStateOf(m.start(), Board::EMPTY);
setStateOf(m.end(), Board::blueColor(bluePlays()));
for (int i=-1; i<=1; ++i)
for (int j=-1; j<=1; ++j)
{
const QPoint p(m.end().x()+i, m.end().y()+j);
if (isValid(p) && stateOf(p) == Board::blueColor(!bluePlays()))
setStateOf(p, Board::blueColor(bluePlays()));
}
undo_.addState(stateString());
bluePlays_ = !bluePlays_;
}
bool Board::gameIsOver() const
{
bool thereAreRed = false;
bool thereAreBlue = false;
bool thereAreEmpty = false;
bool moveIsPossible = false;
for (int i=0; i<sizeX_; ++i)
for (int j=0; j<sizeY_; ++j) {
const QPoint p(i,j);
Board::State state = stateOf(p);
if (state == EMPTY)
thereAreEmpty = true;
if (state == RED)
thereAreRed = true;
if (state == BLUE)
thereAreBlue = true;
if (state == Board::blueColor(bluePlays()) && (pieceCanMove(p)))
moveIsPossible = true;
}
return !thereAreRed || !thereAreBlue || !thereAreEmpty || !moveIsPossible;
}
#if QT_VERSION < 0x040000
QValueVector<Move> Board::possibleMoves(bool bluePlays) const
{
QValueVector<Move> res;
#else
QVector<Move> Board::possibleMoves(bool bluePlays) const
{
QVector<Move> res;
#endif
for (int i=0; i<sizeX_; ++i)
for (int j=0; j<sizeY_; ++j)
{
const QPoint s(i,j);
if (stateOf(s) == Board::blueColor(bluePlays))
{
for (int ii=-2; ii<=2; ++ii)
for (int jj=-2; jj<=2; ++jj)
{
const QPoint e(s.x()+ii,s.y()+jj);
if (isValid(e) && stateOf(e) == Board::EMPTY)
res.append(Move(s, e));
}
}
}
return res;
}
bool Board::pieceCanMove(const QPoint& p) const
{
for (int i=-2; i<=2; ++i)
for (int j=-2; j<=2; ++j)
{
const QPoint q(p.x()+i,p.y()+j);
if (isValid(q) && stateOf(q) == Board::EMPTY)
return true;
}
return false;
}
void Board::setStateOf(const QPoint& p, State s)
{
if (stateOf(p) == RED) nbRed_--;
if (stateOf(p) == BLUE) nbBlue_--;
board_[p.x()][p.y()] = s;
if (stateOf(p) == RED) nbRed_++;
if (stateOf(p) == BLUE) nbBlue_++;
}
QString Board::stateString() const
{
QString res;
for (int i=0; i<sizeX_; ++i)
for (int j=0; j<sizeY_; ++j)
switch(board_[i][j])
{
case Board::EMPTY: res.append('.'); break;
case Board::RED: res.append('R'); break;
case Board::BLUE: res.append('B'); break;
case Board::HOLE: res.append('X'); break;
}
return res;
}
std::ostream& operator<<(std::ostream& out, const Board& b)
{
out << b.sizeX_ << " " << b.sizeY_ << std::endl;
QString s = b.stateString();
for (int i=0; i<b.sizeX_; ++i)
#if QT_VERSION < 0x040000
out << s.mid(i*b.sizeY_, b.sizeY_).latin1() << std::endl;
#else
out << s.mid(i*b.sizeY_, b.sizeY_).toLatin1().constData() << std::endl;
#endif
out << b.undo_;
return out;
}
void Board::initFromStateString(const QString& s)
{
nbBlue_ = nbRed_ = 0;
for (int i=0; i<sizeX_; ++i)
for (int j=0; j<sizeY_; ++j)
#if QT_VERSION < 0x040000
switch (s[i*sizeY_+j].latin1())
#else
switch (s[i*sizeY_+j].toLatin1())
#endif
{
case '.' : board_[i][j] = Board::EMPTY; break;
case 'R' : board_[i][j] = Board::RED; nbRed_++; break;
case 'B' : board_[i][j] = Board::BLUE; nbBlue_++; break;
case 'X' : board_[i][j] = Board::HOLE; break;
}
}
std::istream& operator>>(std::istream& in, Board& b)
{
int sx, sy;
in >> sx >> sy;
b.resize(sx, sy);
char c;
QString s;
for (int i=0; i<sx; ++i)
for (int j=0; j<sy; ++j)
{
in >> c;
s.append(c);
}
b.initFromStateString(s);
in >> b.undo_;
if (b.undo_.isEmpty())
b.undo_.addState(s);
b.bluePlays_ = (b.undo_.nbMoves() % 2 == 1);
return in;
}
void Board::resize(int sizeX, int sizeY)
{
if (board_)
{
for (int i=0; i<sizeX_; ++i)
delete[] board_[i];
delete[] board_;
}
sizeX_ = sizeX;
sizeY_ = sizeY;
board_ = new int*[sizeX_];
for (int i=0; i<sizeX_; ++i)
board_[i] = new int[sizeY_];
}
bool Board::undo()
{
QString state = undo_.undoState();
if (state.isEmpty())
return false;
else
initFromStateString(state);
bluePlays_ = !bluePlays_;
return true;
}
bool Board::redo()
{
QString state = undo_.redoState();
if (state.isEmpty())
return false;
else
initFromStateString(state);
bluePlays_ = !bluePlays_;
return true;
}
Move Board::bestMoveNumberOfNewPieces() const
{
Move res;
int bestValue = 0;
#if QT_VERSION < 0x040000
QValueVector<Move> moves = possibleMoves(bluePlays());
#else
QVector<Move> moves = possibleMoves(bluePlays());
#endif
for (int i=0; i<int(moves.size()); ++i)
{
int value = moves[i].numberOfNewPieces(*this);
if (value > bestValue)
{
bestValue = value;
res = moves[i];
}
}
return res;
}
QString Board::statusMessage() const
{
const QString score = "Blue : " + QString::number(nbBlue_) + " - Red : " + QString::number(nbRed_);
if (gameIsOver())
if (nbBlue_ == nbRed_)
return "Deuce !\n" + score;
else
return QString("The ") + ((nbBlue_>nbRed_)?"Blue":"Red") + " won !\n" + score;
else
return score + " - " + (bluePlays_?"Blue":"Red") + " plays";
}
