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Pawn.cpp
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Pawn.cpp
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//
// Pawn.cpp
// Chess
//
// Created by Albaraa on 3/6/14.
// Copyright (c) 2014 Albaraa. All rights reserved.
//
#include "Pawn.h"
Pawn* Pawn::clone(){
return new Pawn (*this);
}
void Pawn::getValidMove(Piece* (&chessBoard)[9][9], std::vector<PieceMove> &allPossibleMoves, PieceMove & lastMove){
PieceMove newMove;
newMove.movingPiece = this;
//If pawn has not yet moved, the pawn is able to go forward twice.
if(this->hasMoved() == 0){
//Check if owner of current pawn is black and if the two spots in front if the pawn are empty.
if(this->owner() == 1 && chessBoard[this->rank() - 2][this->file()] == NULL && chessBoard[this->rank() - 1][this->file()] == NULL){
newMove.fromRank = this->rank();
newMove.fromFile = this->file();
newMove.rank = this->rank() - 2;
newMove.file = this->file();
newMove.promotion = 0;
if(isKingInCheck(chessBoard, newMove, *this) == false){
allPossibleMoves.push_back(newMove);
}
//Check if owner of current pawn is white and if the two spots in front if the pawn are empty.
}else if(this->owner() == 0 && chessBoard[this->rank() + 2][this->file()] == NULL && chessBoard[this->rank() + 1][this->file()] == NULL){
//Check if king is in check
newMove.fromRank = this->rank();
newMove.fromFile = this->file();
newMove.rank = this->rank() + 2;
newMove.file = this->file();
newMove.promotion = 0;
if(isKingInCheck(chessBoard, newMove, *this) == false){
allPossibleMoves.push_back(newMove);
}
}
}
//Normal pawn moving forward one block
if(this->owner() == 1 && this->rank() <= 8 && this->rank() > 0 && chessBoard[this->rank() - 1][this->file()] == NULL){
//Check if king is in check
newMove.fromRank = this->rank();
newMove.fromFile = this->file();
newMove.rank = this->rank() - 1;
newMove.file = this->file();
newMove.promotion = 0;
if(isKingInCheck(chessBoard, newMove, *this) == false){
allPossibleMoves.push_back(newMove);
}
}else if(this->owner() == 0 && this->rank() <= 8 && this->rank() > 0 && chessBoard[this->rank() + 1][this->file()] == NULL){
//Check if king is in check
newMove.fromRank = this->rank();
newMove.fromFile = this->file();
newMove.rank = this->rank() + 1;
newMove.file = this->file();
newMove.promotion = 0;
if(isKingInCheck(chessBoard, newMove, *this) == false){
allPossibleMoves.push_back(newMove);
}
}
//Pawn moving to the location of another piece of the different owner diagonally (if black [+1][+1] or [+1][-1], if white [-1][+1] or [-1][-1]) taking the piece out.
for(int j = - 1; j <= 1; j++){
if(this->owner() == 1 && this->rank() - 1 <= 8 && j != 0 && this->file() + j <= 8 && this->file() + j > 0 && chessBoard[this->rank() - 1][this->file() + j] != NULL
&& chessBoard[this->rank() - 1][this->file() + j]->owner() != this->owner()){
//Check if king is in check
newMove.fromRank = this->rank();
newMove.fromFile = this->file();
newMove.rank = this->rank() - 1;
newMove.file = this->file() + j;
newMove.promotion = 0;
if(isKingInCheck(chessBoard, newMove, *this) == false){
allPossibleMoves.push_back(newMove);
}
}else if(this->owner() == 0 && this->rank() + 1 > 0 && j != 0 && this->file() + j <= 8 && this->file() + j > 0 && chessBoard[this->rank() + 1][this->file() + j] != NULL
&& chessBoard[this->rank() + 1][this->file() + j]->owner() != this->owner()){
//Check if king is in check
newMove.fromRank = this->rank();
newMove.fromFile = this->file();
newMove.rank = this->rank() + 1;
newMove.file = this->file() + j;
newMove.promotion = 0;
if(isKingInCheck(chessBoard, newMove, *this) == false){
allPossibleMoves.push_back(newMove);
}
}
}
//En Passant if owner is black
if(this->owner() == 1 && this->rank() == 4){
if(this->file() + 1 <= 8 && chessBoard[this->rank()][this->file() + 1] != NULL && chessBoard[this->rank()][this->file() + 1]->owner() != this->owner()
&& chessBoard[this->rank()][this->file() + 1]->type() == this->type() && lastMove.fromRank == 2 && lastMove.rank == 4 && lastMove.file == this->file() + 1){
//Check if king is in check
newMove.fromRank = this->rank();
newMove.fromFile = this->file();
newMove.rank = this->rank() + 1;
newMove.file = this->file() + 1;
newMove.promotion = 0;
if(isKingInCheck(chessBoard, newMove, *this) == false){
allPossibleMoves.push_back(newMove);
}
}
if(this->file() - 1 > 0 && chessBoard[this->rank()][this->file() - 1] != NULL && chessBoard[this->rank()][this->file() - 1]->owner() != this->owner()
&& chessBoard[this->rank()][this->file() - 1]->type() == this->type() && lastMove.fromRank == 2 && lastMove.rank == 4 && lastMove.file == this->file() - 1){
//Check if king is in check
newMove.fromRank = this->rank();
newMove.fromFile = this->file();
newMove.rank = this->rank() + 1;
newMove.file = this->file() - 1;
newMove.promotion = 0;
if(isKingInCheck(chessBoard, newMove, *this) == false){
allPossibleMoves.push_back(newMove);
}
}
//En Passant if owner is white
} else if(this->owner() == 0 && this->rank() == 5){
if(this->file() + 1 <= 8 && chessBoard[this->rank()][this->file() + 1] != NULL && chessBoard[this->rank()][this->file() + 1]->owner() != this->owner()
&& chessBoard[this->rank()][this->file() + 1]->type() == this->type() && lastMove.fromRank == 7 && lastMove.rank == 5 && lastMove.file == this->file() + 1){
//Check if king is in check
newMove.fromRank = this->rank();
newMove.fromFile = this->file();
newMove.rank = this->rank() + 1;
newMove.file = this->file() + 1;
newMove.promotion = 0;
if(isKingInCheck(chessBoard, newMove, *this) == false){
allPossibleMoves.push_back(newMove);
}
}
if(this->file() - 1 > 0 && chessBoard[this->rank()][this->file() - 1] != NULL && chessBoard[this->rank()][this->file() - 1]->owner() != this->owner()
&& chessBoard[this->rank()][this->file() - 1]->type() == this->type() && lastMove.fromRank == 7 && lastMove.rank == 5 && lastMove.file == this->file() - 1){
//Check if king is in check
newMove.fromRank = this->rank();
newMove.fromFile = this->file();
newMove.rank = this->rank() + 1;
newMove.file = this->file() - 1;
newMove.promotion = 0;
if(isKingInCheck(chessBoard, newMove, *this) == false){
allPossibleMoves.push_back(newMove);
}
}
}
return;
};