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  *     Markus Armbruster, 2006
  35  */
  36
  37 #include <config.h>
  38
  39 #include <math.h>
  40 #include "misc.h"
  41 #include "plague.h"
  42 #include "sect.h"
  43 #include "nat.h"
  44 #include "ship.h"
  45 #include "news.h"
  46 #include "file.h"
  47 #include "product.h"
  48 #include "land.h"
  49 #include "xy.h"
  50 #include "nsc.h"
  51 #include "optlist.h"
  52 #include "player.h"
  53 #include "update.h"
  54 #include "common.h"
  55 #include "subs.h"
  56 #include "gen.h"
  57 #include "lost.h"
  58 #include "budg.h"
  59
  60 static void shiprepair(struct shpstr *, struct natstr *, int *, int);
  61 static void upd_ship(struct shpstr *, int, struct natstr *, int *, int);
  62 static int feed_ship(struct shpstr *, int);
  63
  64 int
  65 prod_ship(int etus, int natnum, int *bp, int build)
  66                 /* build = 1, maintain = 0 */
  67 {
  68     struct shpstr *sp;
  69     struct natstr *np;
  70     int n, k = 0;
  71     int start_money;
  72     int lastx = 9999, lasty = 9999;
  73
  74     bp_enable_cachepath();
  75     for (n = 0; NULL != (sp = getshipp(n)); n++) {
  76         if (sp->shp_own == 0)
  77             continue;
  78         if (sp->shp_own != natnum)
  79             continue;
  80         if (sp->shp_effic < SHIP_MINEFF) {
  81             makelost(EF_SHIP, sp->shp_own, sp->shp_uid,
  82                      sp->shp_x, sp->shp_y);
  83             sp->shp_own = 0;
  84             continue;
  85         }
  86
  87         np = getnatp(sp->shp_own);
  88         if (lastx == 9999 || lasty == 9999) {
  89             lastx = sp->shp_x;
  90             lasty = sp->shp_y;
  91         }
  92         if (lastx != sp->shp_x || lasty != sp->shp_y) {
  93             /* Reset the cache */
  94             bp_disable_cachepath();
  95             bp_clear_cachepath();
  96             bp_enable_cachepath();
  97         }
  98         start_money = np->nat_money;
  99         upd_ship(sp, etus, np, bp, build);
 100         if (build && !player->simulation)       /* make sure to only autonav once */
 101             nav_ship(sp);       /* autonav the ship */
 102         sea_money[sp->shp_own] += np->nat_money - start_money;
 103         if (!build || np->nat_money != start_money)
 104             k++;
 105         if (player->simulation)
 106             np->nat_money = start_money;
 107     }
 108     bp_disable_cachepath();
 109     bp_clear_cachepath();
 110
 111     if (opt_SAIL) {
 112         if (build && !player->simulation)       /* make sure to only sail once */
 113             sail_ship(natnum);
 114     }
 115     return k;
 116 }
 117
 118 static void
 119 upd_ship(struct shpstr *sp, int etus,
 120          struct natstr *np, int *bp, int build)
 121                /* build = 1, maintain = 0 */
 122 {
 123     struct sctstr *sectp;
 124     struct mchrstr *mp;
 125     int pstage, ptime;
 126     int oil_gained;
 127     int max_oil;
 128     int max_food;
 129     struct pchrstr *product;
 130     unsigned char *resource;
 131     int dep;
 132     int n;
 133     int mult;
 134     int cost;
 135     int eff;
 136
 137     mp = &mchr[(int)sp->shp_type];
 138     if (build == 1) {
 139         if (!sp->shp_off && np->nat_money >= 0)
 140             shiprepair(sp, np, bp, etus);
 141         if (!player->simulation)
 142             sp->shp_off = 0;
 143     } else {
 144         mult = 1;
 145         if (np->nat_level[NAT_TLEV] < sp->shp_tech * 0.85)
 146             mult = 2;
 147         cost = -(mult * etus * MIN(0.0, money_ship * mp->m_cost));
 148         if (np->nat_money < cost && !player->simulation) {
 149             if ((eff = sp->shp_effic - etus / 5) < SHIP_MINEFF) {
 150                 wu(0, sp->shp_own,
 151                    "%s lost to lack of maintenance\n", prship(sp));
 152                 makelost(EF_SHIP, sp->shp_own, sp->shp_uid,
 153                          sp->shp_x, sp->shp_y);
 154                 sp->shp_own = 0;
 155                 return;
 156             }
 157             wu(0, sp->shp_own,
 158                "%s lost %d%% to lack of maintenance\n",
 159                prship(sp), sp->shp_effic - eff);
 160             sp->shp_effic = eff;
 161         } else {
 162             np->nat_money -= cost;
 163         }
 164
 165         if (!player->simulation) {
 166             sectp = getsectp(sp->shp_x, sp->shp_y);
 167
 168             /* produce oil */
 169             if ((mp->m_flags & M_OIL) && sectp->sct_type == SCT_WATER) {
 170                 product = &pchr[dchr[SCT_OIL].d_prd];
 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                                       * sp->shp_effic / 100.0
 177                                       * sectp->sct_oil / 100.0
 178                                       * prod_eff(SCT_OIL, 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             /* produce fish */
 194             if ((mp->m_flags & M_FOOD) && sectp->sct_type == SCT_WATER) {
 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(SCT_AGRI, sp->shp_tech));
 204             }
 205             /* feed */
 206             if ((n = feed_ship(sp, etus)) > 0) {
 207                 wu(0, sp->shp_own, "%d starved on %s\n", n, prship(sp));
 208                 if (n > 10)
 209                     nreport(sp->shp_own, N_DIE_FAMINE, 0, 1);
 210             }
 211             max_food = mp->m_item[I_FOOD];
 212             if (sp->shp_item[I_FOOD] > max_food)
 213                 sp->shp_item[I_FOOD] = max_food;
 214             /*
 215              * do plague stuff.  plague can't break out on ships,
 216              * but it can still kill people.
 217              */
 218             pstage = sp->shp_pstage;
 219             ptime = sp->shp_ptime;
 220             if (pstage != PLG_HEALTHY) {
 221                 n = plague_people(np, sp->shp_item, &pstage, &ptime, etus);
 222                 switch (n) {
 223                 case PLG_DYING:
 224                     wu(0, sp->shp_own,
 225                        "PLAGUE deaths reported on %s\n", prship(sp));
 226                     nreport(sp->shp_own, N_DIE_PLAGUE, 0, 1);
 227                     break;
 228                 case PLG_INFECT:
 229                     wu(0, sp->shp_own, "%s battling PLAGUE\n", prship(sp));
 230                     break;
 231                 case PLG_INCUBATE:
 232                     /* Are we still incubating? */
 233                     if (n == pstage) {
 234                         /* Yes. Will it turn "infectious" next time? */
 235                         if (ptime <= etus) {
 236                             /* Yes.  Report an outbreak. */
 237                             wu(0, sp->shp_own,
 238                                "Outbreak of PLAGUE on %s!\n", prship(sp));
 239                             nreport(sp->shp_own, N_OUT_PLAGUE, 0, 1);
 240                         }
 241                     } else {
 242                         /* It has already moved on to "infectious" */
 243                         wu(0, sp->shp_own,
 244                            "%s battling PLAGUE\n", prship(sp));
 245                     }
 246                     break;
 247                 case PLG_EXPOSED:
 248                     /* Has the plague moved to "incubation" yet? */
 249                     if (n != pstage) {
 250                         /* Yes. Will it turn "infectious" next time? */
 251                         if (ptime <= etus) {
 252                             /* Yes.  Report an outbreak. */
 253                             wu(0, sp->shp_own,
 254                                "Outbreak of PLAGUE on %s!\n", prship(sp));
 255                             nreport(sp->shp_own, N_OUT_PLAGUE, 0, 1);
 256                         }
 257                     }
 258                     break;
 259                 default:
 260                     break;
 261                 }
 262
 263                 sp->shp_pstage = pstage;
 264                 sp->shp_ptime = ptime;
 265             }
 266             pops[sp->shp_own] += sp->shp_item[I_CIVIL];
 267         }
 268     }
 269 }
 270
 271 /*
 272  * idea is: a sector full of workers can fix up eight
 273  * battleships +8 % eff each etu.  This will cost around
 274  * 8 * 8 * $40 = $2560!
 275  */
 276 static void
 277 shiprepair(struct shpstr *ship, struct natstr *np, 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;
 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;
 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;
 331     }
 332
 333     left = 100 - ship->shp_effic;
 334     delta = roundavg((double)avail / w_p_eff);
 335     if (delta <= 0)
 336         return;
 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     get_materials(sp, bp, mvec, 0);
 353
 354     buildp = leftp;
 355     if (mvec[I_LCM] < lcm_needed)
 356         buildp = MIN(buildp, (float)mvec[I_LCM] / (float)mp->m_lcm);
 357     if (mvec[I_HCM] < hcm_needed)
 358         buildp = MIN(buildp, (float)mvec[I_HCM] / (float)mp->m_hcm);
 359
 360     build = ldround(buildp * 100.0, 1);
 361     memset(mvec, 0, sizeof(mvec));
 362     mvec[I_LCM] = roundavg(mp->m_lcm * buildp);
 363     mvec[I_HCM] = roundavg(mp->m_hcm * buildp);
 364     get_materials(sp, bp, mvec, 1);
 365
 366     if (sp->sct_type != SCT_HARBR)
 367         build = delta;
 368     wf -= build * w_p_eff;
 369     if (wf < 0) {
 370         /*
 371          * I didn't use roundavg here, because I want to penalize
 372          * the player with a large number of ships.
 373          */
 374         if (!player->simulation)
 375             avail = (sp->sct_avail * 100 + wf) / 100;
 376         else
 377             avail = (gt_bg_nmbr(bp, sp, I_MAX + 1) * 100 + wf) / 100;
 378         if (avail < 0)
 379             avail = 0;
 380         if (!player->simulation)
 381             sp->sct_avail = avail;
 382         else
 383             pt_bg_nmbr(bp, sp, I_MAX + 1, avail);
 384     }
 385     if (sp->sct_type != SCT_HARBR)
 386         if ((build + ship->shp_effic) > 80) {
 387             build = 80 - ship->shp_effic;
 388             if (build < 0)
 389                 build = 0;
 390         }
 391
 392     np->nat_money -= mult * mp->m_cost * build / 100.0;
 393     if (!player->simulation)
 394         ship->shp_effic += (signed char)build;
 395 }
 396
 397 /*
 398  * returns the number who starved, if any.
 399  */
 400 static int
 401 feed_ship(struct shpstr *sp, int etus)
 402 {
 403     int needed, take;
 404     double give;
 405     struct nstr_item ni;
 406     struct lndstr *lp;
 407
 408     if (opt_NOFOOD)
 409         return 0;
 410
 411     needed = (int)ceil(food_needed(sp->shp_item, etus));
 412
 413     /* scrounge */
 414     if (needed > sp->shp_item[I_FOOD])
 415         sp->shp_item[I_FOOD] += supply_commod(sp->shp_own,
 416                                         sp->shp_x, sp->shp_y, I_FOOD,
 417                                         needed - sp->shp_item[I_FOOD]);
 418     if (needed > sp->shp_item[I_FOOD]) {
 419         /* take from embarked land units, but don't starve them */
 420         snxtitem_all(&ni, EF_LAND);
 421         while ((lp = nxtitemp(&ni)) && needed > sp->shp_item[I_FOOD]) {
 422             if (lp->lnd_ship != sp->shp_uid)
 423                 continue;
 424             give = lp->lnd_item[I_FOOD] - food_needed(lp->lnd_item, etus);
 425             if (give < 1.0)
 426                 continue;
 427             take = MIN((int)give, needed - sp->shp_item[I_FOOD]);
 428             sp->shp_item[I_FOOD] += take;
 429             lp->lnd_item[I_FOOD] -= take;
 430         }
 431     }
 432
 433     return feed_people(sp->shp_item, etus);
 434 }