/*
* Extension: Checks and adds to hash table using Zobrist hash function
*/
void generateUniqueBoardHash(BoardNode currentBoard, int rowMove, int colMove, int currRow, int currCol) {
int hashKey;
BoardNode generatedBoard;
generatedBoard = makeMove(copyParentToChild(currentBoard,createBoard(currentBoard)),rowMove,colMove,currRow,currCol,DELETE);
hashKey = generateHashKey(generatedBoard);
if(hashBoard(hashKey,generatedBoard)) {
addToQueue(generatedBoard);
checkTarget(generatedBoard);
}
}
// performs move on this state, assumes move is valid
// any move it makes is valid, of course
// because gen() performs validation of moves
// before adding to the vector of moves
void KhetState::imake(KhetMove mv) {
//move piece
KhetPiece targetPiece = board[mv.toFile][mv.toRank];
if (targetPiece.type != EMPTY &&
mv.fromRot == mv.toRot) {//if its rotation target wont be empty
assert(mv.piece.type == SCARAB);
assert(targetPiece.type == ANUBIS || targetPiece.type == PYRAMID);
//scarab swap
board[mv.fromFile][mv.fromRank] = targetPiece;
board[mv.toFile][mv.toRank] = mv.piece;
} else {
board[mv.fromFile][mv.fromRank].type = EMPTY;
board[mv.toFile][mv.toRank] = mv.piece;
board[mv.toFile][mv.toRank].rot = (Rotation)mv.toRot;//mv.piece is original piece
}
key = hashBoard();
//shoot laser
KhetPiece sph;
int tFile;
int tRank;
//set inital laser location
if(ctm == SILVER) {
sph = board[9][0];
tFile = 9;
tRank = 0;
} else {
sph = board[0][7];
tFile = 0;
tRank = 7;
}
assert(board[tFile][tRank].type == SPHINX && board[tFile][tRank].color == ctm);
Rotation laserDir = sph.rot;
LaserHitInfo laserHitInfo = fireLaser(board, tFile, tRank, laserDir, 0, 0);
//piece is to be removed from board
//handle it approrpiately
targetPiece = laserHitInfo.hitPiece;
tFile = laserHitInfo.hitFile;
tRank = laserHitInfo.hitRank;
switch(targetPiece.type) {
case ANUBIS:
//anubis can take hit on front
if(!isOppositeDirections(laserHitInfo.laserDir, targetPiece.rot)) {
board[tFile][tRank].type = EMPTY;
}
break;
case PHAROAH:
board[tFile][tRank].type = EMPTY;
gameOver = true;
winner = (targetPiece.color == RED) ? SILVER : RED;
break;
case PYRAMID:
board[tFile][tRank].type = EMPTY;
break;
case SCARAB:
cout << "ERROR: scarab being removed" << endl;
break;
case SPHINX://sphinx cant be affected
break;
case EMPTY:
break;
default:
cout << "Unknown laser target " << targetPiece.type << endl;
}
//change player
ctm = (ctm == RED) ? SILVER : RED;
}
