37 lines
1.6 KiB
C++
37 lines
1.6 KiB
C++
#include "Knight.hpp"
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/**
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* Creates a new knight with a specified color and position.
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* @param color The color of the knight.
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* @param position The position of the knight.
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*/
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Knight::Knight(ChessPieceColor color, ChessPiecePosition position) : ChessPiece(color, position) {
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this->_char = this->_CHAR_KNIGHT;
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this->_unicode = {"\u265E", "\u2658"};
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}
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/**
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* Gets all chess piece positions the knight can move next.
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* The set of chess piece positions will be ignored, because the knight has a fixed movement.
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* @param chessboard A pointer to the chessboard.
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* @param ignore A set of chess piece positions to be ignored.
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* @return A set of chess piece positions the knight can move next.
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*/
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std::set<ChessPiecePosition> Knight::GetNextPositions(Chessboard* chessboard, std::set<ChessPiecePosition> ignore) {
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std::set<ChessPiecePosition> positions;
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// 3.6. The knight may move to one of the squares nearest to that on which it stands but not on the same rank, file or diagonal.
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for (std::string move : {"T2L1", "T2R1", "L2T1", "L2B1", "B2L1", "B2R1", "R2T1", "R2B1"}) {
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ChessPiecePosition* nextPosition = this->GetPosition().NextFromString(move);
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if (nextPosition == nullptr) continue;
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// 3.1. It is not permitted to move a piece to a square occupied by a piece of the same colour.
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// 3.1.1. If a piece moves to a square occupied by an opponent's piece the latter is captured and removed from the chessboard as part of the same move.
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if (chessboard->IsEmptyField(nextPosition) || chessboard->GetChessPiece(nextPosition)->GetColor() != this->GetColor()) {
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positions.insert(*nextPosition);
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}
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}
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return positions;
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}
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