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82 lines
2.1 KiB
82 lines
2.1 KiB
/*
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* ksokoban - a Sokoban game for TDE
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* Copyright (C) 1998 Anders Widell <d95-awi@nada.kth.se>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "MoveSequence.h"
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#include "LevelMap.h"
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#include "Move.h"
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MoveSequence::MoveSequence (Move *_move, LevelMap *_map, bool _undo) {
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assert (_move->finished_);
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move_ = _move;
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map_ = _map;
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undo_ = _undo;
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if (undo_) {
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pos_ = move_->moveIndex_-2;
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xDest_ = x_ = move_->moves_[move_->moveIndex_-1]&0x7f;
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yDest_ = y_ = (move_->moves_[move_->moveIndex_-1]>>8)&0x7f;
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} else {
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pos_ = 1;
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xDest_ = x_ = move_->moves_[0]&0x7f;
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yDest_ = y_ = (move_->moves_[0]>>8)&0x7f;
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}
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newStep ();
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}
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bool
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MoveSequence::newStep () {
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if (pos_>=move_->moveIndex_ || pos_<0) return false;
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xDest_ = move_->moves_[pos_]&0x7f;
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yDest_ = (move_->moves_[pos_]>>8)&0x7f;
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if (undo_) push_ = (move_->moves_[pos_+1]&0x80)==0x80;
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else push_ = (move_->moves_[pos_]&0x80)==0x80;
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xd_ = yd_ = 0;
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if (xDest_ < x_) xd_ = -1;
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if (xDest_ > x_) xd_ = 1;
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if (yDest_ < y_) yd_ = -1;
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if (yDest_ > y_) yd_ = 1;
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if (undo_) pos_--;
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else pos_++;
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return true;
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}
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bool
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MoveSequence::next () {
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if (x_ == xDest_ && y_ == yDest_ && !newStep ()) return false;
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x_ += xd_;
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y_ += yd_;
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if (undo_) {
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if (push_) return map_->unpush (x_, y_);
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else return map_->unstep (x_, y_);
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} else {
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if (push_) return map_->push (x_, y_);
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else return map_->step (x_, y_);
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}
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}
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