aahand.c

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/****************************************************************************
 Freeciv - Copyright (C) 2004 - The Freeciv 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, 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.
****************************************************************************/
 
#ifdef HAVE_CONFIG_H
#include <fc_config.h>
#endif
 
/* common/aicore */
#include "pf_tools.h"
 
/* common */
#include "accessarea.h"
#include "player.h"
#include "tiledef.h"
 
#include "aahand.h"
 
/*********************************************************************/
void access_areas_refresh(struct civ_map *nmap, struct player *plr)
{
  const struct unit_type *access_utype = access_info_access_unit();
 
  if (access_utype != nullptr) {
    struct unit *access_unit;
    struct aarea_list *alist;
    int index = 0;
 
    area_list_clear_plr(plr);
    alist = aarea_list_new();
 
    area_list_for_player_set(plr, alist);
 
    city_list_iterate(plr->cities, pcity) {
      pcity->server.aarea = nullptr;
    } city_list_iterate_end;
 
    access_unit = unit_virtual_create(plr, nullptr,
                                      access_utype, 0);
 
    city_list_iterate(plr->cities, pcity) {
      if (pcity->server.aarea == nullptr) {
        struct access_area *aarea = fc_malloc(sizeof(struct access_area));
        struct pf_parameter parameter;
        struct pf_map *pfm;
 
        aarea->index = index++;
        aarea->cities = city_list_new();
        aarea->capital = is_capital(pcity);
 
        pcity->server.aarea = aarea;
        city_list_append(aarea->cities, pcity);
        aarea_list_append(alist, aarea);
 
        unit_tile_set(access_unit, city_tile(pcity));
        pft_fill_unit_parameter(&parameter, nmap, access_unit);
        pfm = pf_map_new(&parameter);
 
        city_list_iterate(plr->cities, pcity2) {
          if (pcity2->server.aarea == nullptr) {
            struct pf_path *path;
 
            path = pf_map_path(pfm, city_tile(pcity2));
            if (path != nullptr) {
              pcity2->server.aarea = aarea;
              city_list_append(aarea->cities, pcity2);
 
              if (!aarea->capital && is_capital(pcity2)) {
                aarea->capital = TRUE;
              }
            }
 
            pf_path_destroy(path);
          }
        } city_list_iterate_end;
 
        BV_CLR_ALL(aarea->tiledefs);
        pf_map_tiles_iterate(pfm, ptile, TRUE) {
          if (ptile != nullptr) {
            tiledef_iterate(td) {
              if (tile_matches_tiledef(td, ptile)) {
                BV_SET(aarea->tiledefs, tiledef_number(td));
              }
            } tiledef_iterate_end;
          }
        } pf_map_tiles_iterate_end;
 
        pf_map_destroy(pfm);
      }
    } city_list_iterate_end;
 
    unit_virtual_destroy(access_unit);
  }
}