src/variants/chess/knight.cpp

   1 /*
   2   Copyright (c) 2007 Paolo Capriotti <p.capriotti@gmail.com>
   3             (c) 2007 Maurizio Monge <maurizio.monge@kdemail.net>
   4
   5   This program is free software; you can redistribute it and/or modify
   6   it under the terms of the GNU General Public License as published by
   7   the Free Software Foundation; either version 2 of the License, or
   8   (at your option) any later version.
   9 */
  10
  11 #include "knight.h"
  12 #include <core/move.h>
  13 #include <core/pathinfo.h>
  14 #include <core/state.h>
  15 #include <core/board.h>
  16
  17 namespace Chess {
  18
  19 Knight::Knight() { }
  20
  21 QString Knight::name() const { return "knight"; }
  22
  23 bool Knight::canMove(const Piece&, const Piece&,
  24                    Move& move, const IState*) const {
  25   return (abs(move.delta().x) == 1 && abs(move.delta().y) == 2) ||
  26          (abs(move.delta().y) == 1 && abs(move.delta().x) == 2);
  27 }
  28
  29 int Knight::index() const { return 30; }
  30
  31 Knight* Knight::self() {
  32   static Knight s_instance;
  33   return &s_instance;
  34 }
  35
  36 }