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/* This code is based on Apple's "GeekGameBoard" sample code, version 1.0.
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http://developer.apple.com/samplecode/GeekGameBoard/
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Copyright © 2007 Apple Inc. Copyright © 2008 Jens Alfke. All Rights Reserved.
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Redistribution and use in source and binary forms, with or without modification, are permitted
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provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this list of conditions
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and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice, this list of
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conditions and the following disclaimer in the documentation and/or other materials provided
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with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRI-
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BUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#import "TicTacToeGame.h"
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#import "Grid.h"
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#import "Dispenser.h"
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#import "Piece.h"
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#import "QuartzUtils.h"
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@implementation TicTacToeGame
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- (Piece*) pieceForPlayer: (int)playerNumber
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{
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Piece *p = [[Piece alloc] initWithImageNamed: (playerNumber ? @"O.tiff" :@"X.tiff")
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scale: 80];
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p.owner = [self.players objectAtIndex: playerNumber];
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p.name = (playerNumber ?@"O" :@"X");
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return [p autorelease];
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}
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- (id) init
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{
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self = [super init];
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if (self != nil) {
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[self setNumberOfPlayers: 2];
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}
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return self;
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}
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- (void) setUpBoard
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{
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// Create a 3x3 grid:
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CGFloat center = floor(CGRectGetMidX(_table.bounds));
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[_grid release];
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_grid = [[RectGrid alloc] initWithRows: 3 columns: 3 frame: CGRectMake(center-150,0, 300,300)];
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[_grid addAllCells];
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_grid.allowsMoves = _grid.allowsCaptures = NO;
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_grid.cellColor = CreateGray(1.0, 0.25);
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_grid.lineColor = kTranslucentLightGrayColor;
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[_table addSublayer: _grid];
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}
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- (NSString*) stateString
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{
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unichar str[10];
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for( int i=0; i<9; i++ ) {
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NSString *ident = [_grid cellAtRow: i/3 column: i%3].bit.name;
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if( ident==nil )
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str[i] = '-';
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else
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str[i] = [ident characterAtIndex: 0];
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}
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return [NSString stringWithCharacters: str length: 9];
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}
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- (void) setStateString: (NSString*)stateString
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{
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for( int i=0; i<9; i++ ) {
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Piece *piece = nil;
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if( i < stateString.length )
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switch( [stateString characterAtIndex: i] ) {
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case 'X': case 'x': piece = [self pieceForPlayer: 0]; break;
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case 'O': case 'o': piece = [self pieceForPlayer: 1]; break;
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default: break;
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}
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[_grid cellAtRow: i/3 column: i%3].bit = piece;
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}
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}
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- (Bit*) bitToPlaceInHolder: (id<BitHolder>)holder
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{
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if( holder.bit==nil && [holder isKindOfClass: [Square class]] )
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return [self pieceForPlayer: self.currentPlayer.index];
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else
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return nil;
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}
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- (void) bit: (Bit*)bit movedFrom: (id<BitHolder>)src to: (id<BitHolder>)dst
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{
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Square *square = (Square*)dst;
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int squareIndex = 3*square.row + square.column;
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[self.currentTurn addToMove: [NSString stringWithFormat: @"%@%i", bit.name, squareIndex]];
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[super bit: bit movedFrom: src to: dst];
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}
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static Player* ownerAt( Grid *grid, int index )
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{
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return [grid cellAtRow: index/3 column: index%3].bit.owner;
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}
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/** Should return the winning player, if the current position is a win. */
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- (Player*) checkForWinner
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{
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static const int kWinningTriples[8][3] = { {0,1,2}, {3,4,5}, {6,7,8}, // rows
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{0,3,6}, {1,4,7}, {2,5,8}, // cols
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{0,4,8}, {2,4,6} }; // diagonals
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for( int i=0; i<8; i++ ) {
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const int *triple = kWinningTriples[i];
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Player *p = ownerAt(_grid,triple[0]);
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if( p && p == ownerAt(_grid,triple[1]) && p == ownerAt(_grid,triple[2]) )
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return p;
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}
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return nil;
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}
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@end
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