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
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.
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.
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
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.
28 * ship.c: Do production for ships
30 * Known contributors to this file:
33 * Ron Koenderink, 2004
34 * Markus Armbruster, 2006
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);
65 prod_ship(int etus, int natnum, int *bp, int build)
66 /* build = 1, maintain = 0 */
72 int lastx = 9999, lasty = 9999;
74 bp_enable_cachepath();
75 for (n = 0; NULL != (sp = getshipp(n)); n++) {
78 if (sp->shp_own != natnum)
80 if (sp->shp_effic < SHIP_MINEFF) {
81 makelost(EF_SHIP, sp->shp_own, sp->shp_uid,
82 sp->shp_x, sp->shp_y);
87 np = getnatp(sp->shp_own);
88 if (lastx == 9999 || lasty == 9999) {
92 if (lastx != sp->shp_x || lasty != sp->shp_y) {
94 bp_disable_cachepath();
96 bp_enable_cachepath();
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)
105 if (player->simulation)
106 np->nat_money = start_money;
108 bp_disable_cachepath();
109 bp_clear_cachepath();
112 if (build && !player->simulation) /* make sure to only sail once */
119 upd_ship(struct shpstr *sp, int etus,
120 struct natstr *np, int *bp, int build)
121 /* build = 1, maintain = 0 */
123 struct sctstr *sectp;
129 struct pchrstr *product;
130 unsigned char *resource;
137 mp = &mchr[(int)sp->shp_type];
139 if (np->nat_money >= 0)
140 shiprepair(sp, np, bp, etus);
143 if (np->nat_level[NAT_TLEV] < sp->shp_tech * 0.85)
145 cost = -(mult * etus * MIN(0.0, money_ship * mp->m_cost));
146 if (np->nat_money < cost && !player->simulation) {
147 if ((eff = sp->shp_effic - etus / 5) < SHIP_MINEFF) {
149 "%s lost to lack of maintenance\n", prship(sp));
150 makelost(EF_SHIP, sp->shp_own, sp->shp_uid,
151 sp->shp_x, sp->shp_y);
156 "%s lost %d%% to lack of maintenance\n",
157 prship(sp), sp->shp_effic - eff);
160 np->nat_money -= cost;
163 if (!player->simulation) {
164 sectp = getsectp(sp->shp_x, sp->shp_y);
167 if ((mp->m_flags & M_OIL) && sectp->sct_type == SCT_WATER) {
168 product = &pchr[P_OIL];
169 oil_gained = roundavg(total_work(100, etus,
170 sp->shp_item[I_CIVIL],
171 sp->shp_item[I_MILIT],
174 * sp->shp_effic / 100.0
175 * sectp->sct_oil / 100.0
176 * prod_eff(product, sp->shp_tech));
177 max_oil = mp->m_item[I_OIL];
178 if (sp->shp_item[I_OIL] + oil_gained > max_oil)
179 oil_gained = max_oil - sp->shp_item[I_OIL];
180 if (product->p_nrdep != 0 && oil_gained > 0) {
181 resource = (unsigned char *)sectp + product->p_nrndx;
182 if (*resource * 100 < product->p_nrdep * oil_gained)
183 oil_gained = *resource * 100 / product->p_nrdep;
184 dep = roundavg(oil_gained * product->p_nrdep / 100.0);
185 if (CANT_HAPPEN(dep > *resource))
189 sp->shp_item[I_OIL] += oil_gained;
192 if ((mp->m_flags & M_FOOD) && sectp->sct_type == SCT_WATER) {
193 product = &pchr[P_FOOD];
195 += roundavg(total_work(100, etus,
196 sp->shp_item[I_CIVIL],
197 sp->shp_item[I_MILIT],
200 * sp->shp_effic / 100.0
201 * sectp->sct_fertil / 100.0
202 * prod_eff(product, sp->shp_tech));
205 if ((n = feed_ship(sp, etus)) > 0) {
206 wu(0, sp->shp_own, "%d starved on %s\n", n, prship(sp));
208 nreport(sp->shp_own, N_DIE_FAMINE, 0, 1);
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;
214 * do plague stuff. plague can't break out on ships,
215 * but it can still kill people.
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);
224 "PLAGUE deaths reported on %s\n", prship(sp));
225 nreport(sp->shp_own, N_DIE_PLAGUE, 0, 1);
228 wu(0, sp->shp_own, "%s battling PLAGUE\n", prship(sp));
231 /* Are we still incubating? */
233 /* Yes. Will it turn "infectious" next time? */
235 /* Yes. Report an outbreak. */
237 "Outbreak of PLAGUE on %s!\n", prship(sp));
238 nreport(sp->shp_own, N_OUT_PLAGUE, 0, 1);
241 /* It has already moved on to "infectious" */
243 "%s battling PLAGUE\n", prship(sp));
247 /* Has the plague moved to "incubation" yet? */
249 /* Yes. Will it turn "infectious" next time? */
251 /* Yes. Report an outbreak. */
253 "Outbreak of PLAGUE on %s!\n", prship(sp));
254 nreport(sp->shp_own, N_OUT_PLAGUE, 0, 1);
262 sp->shp_pstage = pstage;
263 sp->shp_ptime = ptime;
265 pops[sp->shp_own] += sp->shp_item[I_CIVIL];
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!
276 shiprepair(struct shpstr *ship, struct natstr *np, int *bp, int etus)
283 int lcm_needed, hcm_needed;
291 mp = &mchr[(int)ship->shp_type];
292 sp = getsectp(ship->shp_x, ship->shp_y);
294 if ((sp->sct_own != ship->shp_own) && (sp->sct_own != 0)) {
295 rel = getrel(getnatp(sp->sct_own), ship->shp_own);
302 /* only military can work on a military boat */
303 if (ship->shp_glim > 0)
304 wf = etus * ship->shp_item[I_MILIT] / 2;
306 wf = etus * (ship->shp_item[I_CIVIL] / 2 + ship->shp_item[I_MILIT] / 5);
308 if (sp->sct_type != SCT_HARBR) {
312 if (!player->simulation)
313 avail = wf + sp->sct_avail * 100;
315 avail = wf + gt_bg_nmbr(bp, sp, I_MAX + 1) * 100;
318 w_p_eff = SHP_BLD_WORK(mp->m_lcm, mp->m_hcm);
320 if ((sp->sct_off) && (sp->sct_own == ship->shp_own))
324 if (np->nat_level[NAT_TLEV] < ship->shp_tech * 0.85)
327 if (ship->shp_effic == 100) {
328 /* ship is ok; no repairs needed */
332 left = 100 - ship->shp_effic;
333 delta = roundavg((double)avail / w_p_eff);
336 if (delta > (int)((float)etus * ship_grow_scale))
337 delta = (int)((float)etus * ship_grow_scale);
341 /* delta is the max amount we can grow */
343 left = 100 - ship->shp_effic;
347 leftp = left / 100.0;
348 memset(mvec, 0, sizeof(mvec));
349 mvec[I_LCM] = lcm_needed = ldround(mp->m_lcm * leftp, 1);
350 mvec[I_HCM] = hcm_needed = ldround(mp->m_hcm * leftp, 1);
351 get_materials(sp, bp, mvec, 0);
354 if (mvec[I_LCM] < lcm_needed)
355 buildp = MIN(buildp, (float)mvec[I_LCM] / (float)mp->m_lcm);
356 if (mvec[I_HCM] < hcm_needed)
357 buildp = MIN(buildp, (float)mvec[I_HCM] / (float)mp->m_hcm);
359 build = ldround(buildp * 100.0, 1);
360 memset(mvec, 0, sizeof(mvec));
361 mvec[I_LCM] = roundavg(mp->m_lcm * buildp);
362 mvec[I_HCM] = roundavg(mp->m_hcm * buildp);
363 get_materials(sp, bp, mvec, 1);
365 if (sp->sct_type != SCT_HARBR)
367 wf -= build * w_p_eff;
370 * I didn't use roundavg here, because I want to penalize
371 * the player with a large number of ships.
373 if (!player->simulation)
374 avail = (sp->sct_avail * 100 + wf) / 100;
376 avail = (gt_bg_nmbr(bp, sp, I_MAX + 1) * 100 + wf) / 100;
379 if (!player->simulation)
380 sp->sct_avail = avail;
382 pt_bg_nmbr(bp, sp, I_MAX + 1, avail);
384 if (sp->sct_type != SCT_HARBR)
385 if ((build + ship->shp_effic) > 80) {
386 build = 80 - ship->shp_effic;
391 np->nat_money -= mult * mp->m_cost * build / 100.0;
392 if (!player->simulation)
393 ship->shp_effic += (signed char)build;
397 * returns the number who starved, if any.
400 feed_ship(struct shpstr *sp, int etus)
410 needed = (int)ceil(food_needed(sp->shp_item, etus));
413 if (needed > sp->shp_item[I_FOOD])
414 sp->shp_item[I_FOOD] += supply_commod(sp->shp_own,
415 sp->shp_x, sp->shp_y, I_FOOD,
416 needed - sp->shp_item[I_FOOD]);
417 if (needed > sp->shp_item[I_FOOD]) {
418 /* take from embarked land units, but don't starve them */
419 snxtitem_all(&ni, EF_LAND);
420 while ((lp = nxtitemp(&ni)) && needed > sp->shp_item[I_FOOD]) {
421 if (lp->lnd_ship != sp->shp_uid)
423 give = lp->lnd_item[I_FOOD] - food_needed(lp->lnd_item, etus);
426 take = MIN((int)give, needed - sp->shp_item[I_FOOD]);
427 sp->shp_item[I_FOOD] += take;
428 lp->lnd_item[I_FOOD] -= take;
432 return feed_people(sp->shp_item, etus);