Zombie.h

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/*
 *  Copyright (C) 2000-2001  The Exult Team
 *
 *  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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#ifndef ZOMBIE_H
#define ZOMBIE_H


#include "PathFinder.h"


class Zombie: public virtual PathFinder
  {
  int major_distance;   // Distance in tiles to go.
  int major_frame_incr;   // # steps to take in faster dir.
  Tile_coord cur;     // Current pos. within world.
          // ->'s to cur.tx, cur.ty.
  short *major_coord, *minor_coord;
  int major_dir, minor_dir; // 1 or -1 for dir. along each axis.
  int major_delta, minor_delta; // For each tile we move along major
          //   axis, we add 'minor_delta'.  When
          //   the sum >= 'major_delta', we move
          //   1 tile along minor axis, and
          //   subtract 'major_delta' from sum.
  int sum;      // Sum of 'minor_delta''s.
public:
  Zombie(int major_incr = 1) : major_distance(0), 
          major_frame_incr(major_incr)
    {  }
  // Find a path from sx,sy,sz to dx,dy,dz
  // Return 0 if no path can be traced.
  // Return !0 if path found
  virtual int NewPath(Tile_coord s, Tile_coord d,
          Pathfinder_client *client);

  // Retrieve the coordinates of the next step on the path
  virtual int GetNextStep(Tile_coord& n, bool& done);
  virtual int get_num_steps() // # of steps left to take.
    { return major_distance/major_frame_incr; }
  virtual ~Zombie();
  };

#endif

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