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walk.h

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2003-2005 The ScummVM project
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $Header: /cvsroot/scummvm/scummvm/queen/walk.h,v 1.26.2.1 2005/10/18 02:11:19 sev Exp $
 *
 */

#ifndef QUEENWALK_H
#define QUEENWALK_H

#include "common/util.h"
#include "queen/structs.h"

namespace Queen {

struct MovePersonAnim {
      int16 firstFrame;
      int16 lastFrame;
      Direction facing;

      void set(int16 ff, int16 lf, Direction dir) {
            firstFrame = ff;
            lastFrame = lf;
            facing = dir;
      }
};

struct WalkData {
      int16 dx, dy;
      const Area *area;
      uint16 areaNum;
      MovePersonAnim anim;
};

struct MovePersonData {
      const char *name;
      int16 walkLeft1, walkLeft2;
      int16 walkRight1, walkRight2;
      int16 walkBack1, walkBack2;
      int16 walkFront1, walkFront2;
      uint16 frontStandingFrame;
      uint16 backStandingFrame;
      uint16 animSpeed;
      uint16 moveSpeed;
};

class QueenEngine;

class Walk {
public:

      Walk(QueenEngine *vm);

      int16 moveJoe(int direction, int16 endx, int16 endy, bool inCutaway);
      int16 movePerson(const Person *pp, int16 endx, int16 endy, uint16 curImage, int direction);

      void stopJoe();
      void stopPerson(uint16 bobNum);

      enum {
            MAX_WALK_DATA = 16
      };

private:

      void animateJoePrepare();
      void animateJoe();

      void animatePersonPrepare(const MovePersonData *mpd, int direction);
      void animatePerson(const MovePersonData *mpd, uint16 image, uint16 bobNum, uint16 bankNum, int direction);

      //! compute transition coordinate
      static int16 calcC(int16 c1, int16 c2, int16 c3, int16 c4, int16 lastc);

      //! find area for position
      int16 findAreaPosition(int16 *x, int16 *y, bool recalibrate);

      //! find an area not already struck
      uint16 findFreeArea(uint16 area) const;

      //! return true if the area is already on the walking path
      bool isAreaStruck(uint16 area) const;

      //! calculates the path list from oldArea to newArea
      bool calcPath(uint16 oldArea, uint16 newArea);

      //! resets path computed in calcPath()
      void initWalkData();

      //! add an area to the path
      void incWalkData(int16 px, int16 py, int16 x, int16 y, uint16 area);

      //! compute path (and populates _walkData) from current position to the new one
      bool calc(uint16 oldPos, uint16 newPos, int16 oldx, int16 oldy, int16 x, int16 y);


      //! areas for current room
      const Area *_roomArea;

      //! number of areas for current room
      uint16 _roomAreaCount;

      //! walking steps
      WalkData _walkData[MAX_WALK_DATA];

      //! number of walking steps
      uint16 _walkDataCount;

      uint16 _areaStrike[MAX_WALK_DATA];
      uint16 _areaStrikeCount;

      uint16 _areaList[MAX_WALK_DATA];
      uint16 _areaListCount;

      //! set if stopJoe() is called
      bool _joeInterrupted;

      //! set if handleSpecialArea() is called
      bool _joeMoveBlock;

      QueenEngine *_vm;

      //! persons walking animation data
      static const MovePersonData _moveData[];
};

} // End of namespace Queen

#endif

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