git.pond.sub.org Git - empserver/blob - src/lib/update/ship.c

   1 /*
   2  *  Empire - A multi-player, client/server Internet based war game.
   3  *  Copyright (C) 1986-2006, Dave Pare, Jeff Bailey, Thomas Ruschak,
   4  *                           Ken Stevens, Steve McClure
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  *  ---
  21  *
  22  *  See files README, COPYING and CREDITS in the root of the source
  23  *  tree for related information and legal notices.  It is expected
  24  *  that future projects/authors will amend these files as needed.
  25  *
  26  *  ---
  27  *
  28  *  ship.c: Do production for ships
  29  *
  30  *  Known contributors to this file:
  31  *     Dave Pare, 1986
  32  *     Steve McClure, 1996
  33  *     Ron Koenderink, 2004
  34  */
  35
  36 #include <config.h>
  37
  38 #include "misc.h"
  39 #include "plague.h"
  40 #include "sect.h"
  41 #include "nat.h"
  42 #include "ship.h"
  43 #include "news.h"
  44 #include "file.h"
  45 #include "product.h"
  46 #include "land.h"
  47 #include "xy.h"
  48 #include "nsc.h"
  49 #include "optlist.h"
  50 #include "player.h"
  51 #include "update.h"
  52 #include "common.h"
  53 #include "subs.h"
  54 #include "gen.h"
  55 #include "lost.h"
  56 #include "budg.h"
  57
  58 static int shiprepair(struct shpstr *, struct natstr *,
  59                       int *, int);
  60 static void upd_ship(struct shpstr *, int,
  61                      struct natstr *, int *, int);
  62
  63 int
  64 prod_ship(int etus, int natnum, int *bp, int build)
  65                 /* build = 1, maintain = 0 */
  66 {
  67     struct shpstr *sp;
  68     struct natstr *np;
  69     int n, k = 0;
  70     int start_money;
  71     int lastx = 9999, lasty = 9999;
  72
  73     bp_enable_cachepath();
  74     for (n = 0; NULL != (sp = getshipp(n)); n++) {
  75         if (sp->shp_own == 0)
  76             continue;
  77         if (sp->shp_own != natnum)
  78             continue;
  79         np = getnatp(sp->shp_own);
  80         start_money = np->nat_money;
  81         if (lastx == 9999 || lasty == 9999) {
  82             lastx = sp->shp_x;
  83             lasty = sp->shp_y;
  84         }
  85         if (lastx != sp->shp_x || lasty != sp->shp_y) {
  86             /* Reset the cache */
  87             bp_disable_cachepath();
  88             bp_clear_cachepath();
  89             bp_enable_cachepath();
  90         }
  91         upd_ship(sp, etus, np, bp, build);
  92         if (build && !player->simulation)       /* make sure to only autonav once */
  93             nav_ship(sp);       /* autonav the ship */
  94         sea_money[sp->shp_own] += np->nat_money - start_money;
  95         if (!build || np->nat_money != start_money)
  96             k++;
  97         if (player->simulation)
  98             np->nat_money = start_money;
  99     }
 100     bp_disable_cachepath();
 101     bp_clear_cachepath();
 102
 103     if (opt_SAIL) {
 104         if (build && !player->simulation)       /* make sure to only sail once */
 105             sail_ship(natnum);
 106     }
 107     return k;
 108 }
 109
 110 static void
 111 upd_ship(struct shpstr *sp, int etus,
 112          struct natstr *np, int *bp, int build)
 113                /* build = 1, maintain = 0 */
 114 {
 115     struct sctstr *sectp;
 116     struct mchrstr *mp;
 117     int pstage, ptime;
 118     int oil_gained;
 119     int max_oil;
 120     int max_food;
 121     struct pchrstr *product;
 122     unsigned char *resource;
 123     int dep;
 124     int n;
 125     int mult;
 126     int needed;
 127     int cost;
 128     int eff;
 129
 130     mp = &mchr[(int)sp->shp_type];
 131     if (build == 1) {
 132         if (np->nat_priorities[PRI_SBUILD] == 0 || np->nat_money < 0)
 133             return;
 134         if (sp->shp_effic < SHIP_MINEFF || !shiprepair(sp, np, bp, etus)) {
 135             makelost(EF_SHIP, sp->shp_own, sp->shp_uid, sp->shp_x,
 136                      sp->shp_y);
 137             sp->shp_own = 0;
 138             return;
 139         }
 140     } else {
 141         mult = 1;
 142         if (np->nat_level[NAT_TLEV] < sp->shp_tech * 0.85)
 143             mult = 2;
 144         cost = -(mult * etus * MIN(0.0, money_ship * mp->m_cost));
 145         if ((np->nat_priorities[PRI_SMAINT] == 0 || np->nat_money < cost)
 146             && !player->simulation) {
 147             if ((eff = sp->shp_effic - etus / 5) < SHIP_MINEFF) {
 148                 wu(0, sp->shp_own,
 149                    "%s lost to lack of maintenance\n", prship(sp));
 150                 makelost(EF_SHIP, sp->shp_own, sp->shp_uid, sp->shp_x,
 151                          sp->shp_y);
 152                 sp->shp_own = 0;
 153                 return;
 154             }
 155             wu(0, sp->shp_own,
 156                "%s lost %d%% to lack of maintenance\n",
 157                prship(sp), sp->shp_effic - eff);
 158             sp->shp_effic = eff;
 159         } else {
 160             np->nat_money -= cost;
 161         }
 162
 163         if (!player->simulation) {
 164             sectp = getsectp(sp->shp_x, sp->shp_y);
 165
 166             if ((mp->m_flags & M_OIL) && sectp->sct_type == SCT_WATER) {
 167                 /*
 168                  * take care of oil production
 169                  */
 170                 product = &pchr[P_OIL];
 171                 oil_gained = roundavg(total_work(100, etus,
 172                                                  sp->shp_item[I_CIVIL],
 173                                                  sp->shp_item[I_MILIT],
 174                                                  sp->shp_item[I_UW],
 175                                                  ITEM_MAX)
 176                                       * (double)sp->shp_effic / 100.0
 177                                       * (double)sectp->sct_oil / 100.0
 178                                       * prod_eff(product, sp->shp_tech));
 179                 max_oil = mp->m_item[I_OIL];
 180                 if (sp->shp_item[I_OIL] + oil_gained > max_oil)
 181                     oil_gained = max_oil - sp->shp_item[I_OIL];
 182                 if (product->p_nrdep != 0 && oil_gained > 0) {
 183                     resource = (unsigned char *)sectp + product->p_nrndx;
 184                     if (*resource * 100 < product->p_nrdep * oil_gained)
 185                         oil_gained = *resource * 100 / product->p_nrdep;
 186                     dep = roundavg(oil_gained * product->p_nrdep / 100.0);
 187                     if (CANT_HAPPEN(dep > *resource))
 188                         dep = *resource;
 189                     *resource -= dep;
 190                 }
 191                 sp->shp_item[I_OIL] += oil_gained;
 192             }
 193             if ((mp->m_flags & M_FOOD) && sectp->sct_type == SCT_WATER) {
 194                 product = &pchr[P_FOOD];
 195                 sp->shp_item[I_FOOD]
 196                     += roundavg(total_work(100, etus,
 197                                            sp->shp_item[I_CIVIL],
 198                                            sp->shp_item[I_MILIT],
 199                                            sp->shp_item[I_UW],
 200                                            ITEM_MAX)
 201                                 * sp->shp_effic / 100.0
 202                                 * sectp->sct_fertil / 100.0
 203                                 * prod_eff(product, sp->shp_tech));
 204             }
 205             if ((n = feed_ship(sp, etus, &needed, 1)) > 0) {
 206                 wu(0, sp->shp_own, "%d starved on %s\n", n, prship(sp));
 207                 if (n > 10)
 208                     nreport(sp->shp_own, N_DIE_FAMINE, 0, 1);
 209             }
 210             max_food = mp->m_item[I_FOOD];
 211             if (sp->shp_item[I_FOOD] > max_food)
 212                 sp->shp_item[I_FOOD] = max_food;
 213             /*
 214              * do plague stuff.  plague can't break out on ships,
 215              * but it can still kill people.
 216              */
 217             pstage = sp->shp_pstage;
 218             ptime = sp->shp_ptime;
 219             if (pstage != PLG_HEALTHY) {
 220                 n = plague_people(np, sp->shp_item, &pstage, &ptime, etus);
 221                 switch (n) {
 222                 case PLG_DYING:
 223                     wu(0, sp->shp_own,
 224                        "PLAGUE deaths reported on %s\n", prship(sp));
 225                     nreport(sp->shp_own, N_DIE_PLAGUE, 0, 1);
 226                     break;
 227                 case PLG_INFECT:
 228                     wu(0, sp->shp_own, "%s battling PLAGUE\n", prship(sp));
 229                     break;
 230                 case PLG_INCUBATE:
 231                     /* Are we still incubating? */
 232                     if (n == pstage) {
 233                         /* Yes. Will it turn "infectious" next time? */
 234                         if (ptime <= etus) {
 235                             /* Yes.  Report an outbreak. */
 236                             wu(0, sp->shp_own,
 237                                "Outbreak of PLAGUE on %s!\n", prship(sp));
 238                             nreport(sp->shp_own, N_OUT_PLAGUE, 0, 1);
 239                         }
 240                     } else {
 241                         /* It has already moved on to "infectious" */
 242                         wu(0, sp->shp_own,
 243                            "%s battling PLAGUE\n", prship(sp));
 244                     }
 245                     break;
 246                 case PLG_EXPOSED:
 247                     /* Has the plague moved to "incubation" yet? */
 248                     if (n != pstage) {
 249                         /* Yes. Will it turn "infectious" next time? */
 250                         if (ptime <= etus) {
 251                             /* Yes.  Report an outbreak. */
 252                             wu(0, sp->shp_own,
 253                                "Outbreak of PLAGUE on %s!\n", prship(sp));
 254                             nreport(sp->shp_own, N_OUT_PLAGUE, 0, 1);
 255                         }
 256                     }
 257                     break;
 258                 default:
 259                     break;
 260                 }
 261
 262                 sp->shp_pstage = pstage;
 263                 sp->shp_ptime = ptime;
 264             }
 265             pops[sp->shp_own] += sp->shp_item[I_CIVIL];
 266         }
 267     }
 268 }
 269
 270 /*
 271  * idea is: a sector full of workers can fix up eight
 272  * battleships +8 % eff each etu.  This will cost around
 273  * 8 * 8 * $40 = $2560!
 274  */
 275 static int
 276 shiprepair(struct shpstr *ship, struct natstr *np,
 277            int *bp, int etus)
 278 {
 279     int delta;
 280     struct sctstr *sp;
 281     struct mchrstr *mp;
 282     float leftp, buildp;
 283     int left, build;
 284     int lcm_needed, hcm_needed;
 285     int wf;
 286     int avail;
 287     int w_p_eff;
 288     int mult;
 289     int mvec[I_MAX + 1];
 290     int rel;
 291
 292     mp = &mchr[(int)ship->shp_type];
 293     sp = getsectp(ship->shp_x, ship->shp_y);
 294
 295     if ((sp->sct_own != ship->shp_own) && (sp->sct_own != 0)) {
 296         rel = getrel(getnatp(sp->sct_own), ship->shp_own);
 297
 298         if (rel < FRIENDLY)
 299             return 1;
 300     }
 301
 302     wf = 0;
 303     /* only military can work on a military boat */
 304     if (ship->shp_glim > 0)
 305         wf = etus * ship->shp_item[I_MILIT] / 2;
 306     else
 307         wf = etus * (ship->shp_item[I_CIVIL] / 2 + ship->shp_item[I_MILIT] / 5);
 308
 309     if (sp->sct_type != SCT_HARBR) {
 310         wf /= 3;
 311         avail = wf;
 312     } else {
 313         if (!player->simulation)
 314             avail = wf + sp->sct_avail * 100;
 315         else
 316             avail = wf + gt_bg_nmbr(bp, sp, I_MAX + 1) * 100;
 317     }
 318
 319     w_p_eff = SHP_BLD_WORK(mp->m_lcm, mp->m_hcm);
 320
 321     if ((sp->sct_off) && (sp->sct_own == ship->shp_own))
 322         return 1;
 323
 324     mult = 1;
 325     if (np->nat_level[NAT_TLEV] < ship->shp_tech * 0.85)
 326         mult = 2;
 327
 328     if (ship->shp_effic == 100) {
 329         /* ship is ok; no repairs needed */
 330         return 1;
 331     }
 332
 333     left = 100 - ship->shp_effic;
 334     delta = roundavg((double)avail / w_p_eff);
 335     if (delta <= 0)
 336         return 1;
 337     if (delta > (int)((float)etus * ship_grow_scale))
 338         delta = (int)((float)etus * ship_grow_scale);
 339     if (delta > left)
 340         delta = left;
 341
 342     /* delta is the max amount we can grow */
 343
 344     left = 100 - ship->shp_effic;
 345     if (left > delta)
 346         left = delta;
 347
 348     leftp = left / 100.0;
 349     memset(mvec, 0, sizeof(mvec));
 350     mvec[I_LCM] = lcm_needed = ldround(mp->m_lcm * leftp, 1);
 351     mvec[I_HCM] = hcm_needed = ldround(mp->m_hcm * leftp, 1);
 352
 353     get_materials(sp, bp, mvec, 0);
 354
 355     if (mvec[I_LCM] >= lcm_needed)
 356         buildp = leftp;
 357     else
 358         buildp = ((float)mvec[I_LCM] / (float)mp->m_lcm);
 359     if (mvec[I_HCM] < hcm_needed)
 360         buildp = MIN(buildp, ((float)mvec[I_HCM] / (float)mp->m_hcm));
 361
 362     build = ldround(buildp * 100.0, 1);
 363     memset(mvec, 0, sizeof(mvec));
 364     mvec[I_LCM] = lcm_needed = roundavg(mp->m_lcm * buildp);
 365     mvec[I_HCM] = hcm_needed = roundavg(mp->m_hcm * buildp);
 366
 367     get_materials(sp, bp, mvec, 1);
 368
 369     if (sp->sct_type != SCT_HARBR)
 370         build = delta;
 371     wf -= build * w_p_eff;
 372     if (wf < 0) {
 373         /*
 374          * I didn't use roundavg here, because I want to penalize
 375          * the player with a large number of ships.
 376          */
 377         if (!player->simulation)
 378             avail = (sp->sct_avail * 100 + wf) / 100;
 379         else
 380             avail = (gt_bg_nmbr(bp, sp, I_MAX + 1) * 100 + wf) / 100;
 381         if (avail < 0)
 382             avail = 0;
 383         if (!player->simulation)
 384             sp->sct_avail = avail;
 385         else
 386             pt_bg_nmbr(bp, sp, I_MAX + 1, avail);
 387     }
 388     if (sp->sct_type != SCT_HARBR)
 389         if ((build + ship->shp_effic) > 80) {
 390             build = 80 - ship->shp_effic;
 391             if (build < 0)
 392                 build = 0;
 393         }
 394
 395     np->nat_money -= mult * mp->m_cost * build / 100.0;
 396     if (!player->simulation)
 397         ship->shp_effic += build;
 398     return 1;
 399 }
 400
 401 /*
 402  * returns the number who starved, if any.
 403  */
 404 int
 405 feed_ship(struct shpstr *sp, int etus, int *needed, int doit)
 406 {
 407     double food_eaten, land_eaten;
 408     int ifood_eaten;
 409     int can_eat, need;
 410     int total_people;
 411     int to_starve;
 412     int starved;
 413     struct nstr_item ni;
 414     struct lndstr *lp;
 415
 416     if (opt_NOFOOD)
 417         return 0;               /* no food no work to do */
 418
 419     total_people
 420         = sp->shp_item[I_CIVIL] + sp->shp_item[I_MILIT] + sp->shp_item[I_UW];
 421     food_eaten = etus * eatrate * total_people;
 422     ifood_eaten = (int)food_eaten;
 423     if (food_eaten - ifood_eaten > 0)
 424         ifood_eaten++;
 425     starved = 0;
 426     *needed = 0;
 427     if (!player->simulation && ifood_eaten > sp->shp_item[I_FOOD])
 428         sp->shp_item[I_FOOD]
 429             += supply_commod(sp->shp_own, sp->shp_x, sp->shp_y,
 430                              I_FOOD, ifood_eaten - sp->shp_item[I_FOOD]);
 431
 432 /* doit - only steal food from land units during the update */
 433     if (ifood_eaten > sp->shp_item[I_FOOD] && sp->shp_nland > 0 && doit) {
 434         snxtitem_all(&ni, EF_LAND);
 435         while ((lp = nxtitemp(&ni)) && ifood_eaten > sp->shp_item[I_FOOD]) {
 436             if (lp->lnd_ship != sp->shp_uid)
 437                 continue;
 438             need = ifood_eaten - sp->shp_item[I_FOOD];
 439             land_eaten = etus * eatrate * lnd_getmil(lp);
 440             if (lp->lnd_item[I_FOOD] - need > land_eaten) {
 441                 sp->shp_item[I_FOOD] += need;
 442                 lp->lnd_item[I_FOOD] -= need;
 443             } else if (lp->lnd_item[I_FOOD] - land_eaten > 0) {
 444                 sp->shp_item[I_FOOD] += lp->lnd_item[I_FOOD] - land_eaten;
 445                 lp->lnd_item[I_FOOD] -= lp->lnd_item[I_FOOD] - land_eaten;
 446             }
 447         }
 448     }
 449
 450     if (ifood_eaten > sp->shp_item[I_FOOD]) {
 451         *needed = ifood_eaten - sp->shp_item[I_FOOD];
 452         can_eat = sp->shp_item[I_FOOD] / (etus * eatrate);
 453         /* only want to starve off at most 1/2 the populace. */
 454         if (can_eat < total_people / 2)
 455             can_eat = total_people / 2;
 456
 457         to_starve = total_people - can_eat;
 458         while (to_starve && sp->shp_item[I_UW]) {
 459             to_starve--;
 460             starved++;
 461             sp->shp_item[I_UW]--;
 462         }
 463         while (to_starve && sp->shp_item[I_CIVIL]) {
 464             to_starve--;
 465             starved++;
 466             sp->shp_item[I_CIVIL]--;
 467         }
 468         while (to_starve && sp->shp_item[I_MILIT]) {
 469             to_starve--;
 470             starved++;
 471             sp->shp_item[I_MILIT]--;
 472         }
 473
 474         sp->shp_item[I_FOOD] = 0;
 475     } else {
 476         sp->shp_item[I_FOOD] -= (int)food_eaten;
 477     }
 478     return starved;
 479 }