src/variants/shogi/silver.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 "silver.h"
  12 #include <core/behaviour.h>
  13 #include <core/move.h>
  14 #include <core/state.h>
  15
  16 namespace Shogi {
  17
  18 Silver::Silver() { }
  19
  20 QString Silver::name() const { return "silver"; }
  21
  22 bool Silver::canMove(const Piece& piece, const Piece&,
  23                    Move& move, const IState* state) const {
  24   const IBehaviour* behaviour = state->behaviour();
  25   if (!behaviour) return false;
  26   return (abs(move.delta().x) == abs(move.delta().y) && abs(move.delta().x) == 1)
  27           || (move.delta().y == behaviour->direction(piece.color()).y && abs(move.delta().x) <= 1);
  28 }
  29
  30 int Silver::index() const { return 10000; }
  31
  32 Silver* Silver::self() {
  33   static Silver s_instance;
  34   return &s_instance;
  35 }
  36
  37 }