2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2014, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure, Markus Armbruster
6 * Empire 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 3 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, see <http://www.gnu.org/licenses/>.
21 * See files README, COPYING and CREDITS in the root of the source
22 * tree for related information and legal notices. It is expected
23 * that future projects/authors will amend these files as needed.
27 * retreat.c: Retreat subroutines
29 * Known contributors to this file:
31 * Ron Koenderink, 2005-2006
32 * Markus Armbruster, 2006-2014
49 #include "prototypes.h"
55 static int findcondition(char);
56 static int retreat_land1(struct lndstr *, char, int);
57 static int retreat_ship1(struct shpstr *, char, int);
64 static struct ccode conditions[] = {
65 { 'i', { "retreated with a damaged friend",
67 { 't', { "retreated with a torpedoed ship",
68 "was hit by a torpedo" } },
69 { 's', { "retreated with a ship scared by sonar",
70 "detected a sonar ping" } },
71 { 'h', { "retreated with a helpless ship",
72 "was fired upon with no one able to defend it" } },
73 { 'b', { "retreated with a bombed friend",
75 { 'd', { "retreated with a depth-charged ship",
76 "was depth-charged" } },
77 { 'u', { "retreated with a boarded ship", "was boarded" } },
78 { 0, { "panicked", "panicked"} }
82 check_retreat_and_do_shipdamage(struct shpstr *sp, int dam)
88 if (sp->shp_rflags & RET_INJURED)
89 retreat_ship(sp, 'i');
95 retreat_ship(struct shpstr *sp, char code)
100 if (sp->shp_effic < SHIP_MINEFF || CANT_HAPPEN(!sp->shp_own))
102 if (sp->shp_own == player->cnum)
105 retreat_ship1(sp, code, 1);
106 if (sp->shp_rpath[0] == 0)
109 if (sp->shp_rflags & RET_GROUP) {
110 snxtitem_group(&ni, EF_SHIP, sp->shp_fleet);
111 while (nxtitem(&ni, &ship))
112 if (ship.shp_own == sp->shp_own) {
113 if (ship.shp_uid != sp->shp_uid) {
114 retreat_ship1(&ship, code, 0);
115 getship(ship.shp_uid, &ship);
116 if (ship.shp_rpath[0] == 0) {
118 putship(ship.shp_uid, &ship);
126 retreat_ship1(struct shpstr *sp, char code, int orig)
129 /* Is this the originally scared ship, or a follower */
147 /* can't retreat a ship that's sailin, bad things happend */
150 "%s %s,\nbut had sailing orders, and couldn't retreat!\n",
151 prship(sp), conditions[findcondition(code)].desc[orig]);
155 /* check crew - uws don't count */
156 if (sp->shp_item[I_MILIT] == 0 && sp->shp_item[I_CIVIL] == 0) {
158 "%s %s,\nbut had no crew, and couldn't retreat!\n", prship(sp),
159 conditions[findcondition(code)].desc[orig]);
163 getsect(sp->shp_x, sp->shp_y, §);
164 switch (shp_check_nav(sp, §)) {
168 "%s %s,\nbut was caught in a construction zone, and couldn't retreat!\n",
169 prship(sp), conditions[findcondition(code)].desc[orig]);
174 "%s %s,\nbut was landlocked, and couldn't retreat!\n",
175 prship(sp), conditions[findcondition(code)].desc[orig]);
182 "%s %s,\nbut was subject to an empire error, and couldn't retreat!\n",
183 prship(sp), conditions[findcondition(code)].desc[orig]);
187 if (sp->shp_mobil <= 0.0) {
189 "%s %s,\nbut had no mobility, and couldn't retreat!\n",
190 prship(sp), conditions[findcondition(code)].desc[orig]);
194 for (i = 0; i < MAX_RETREAT && sp->shp_rpath[0]; i++) {
195 if (sp->shp_mobil <= 0.0) {
197 "%s %s,\nbut ran out of mobility, and couldn't retreat fully!\n",
198 prship(sp), conditions[findcondition(code)].desc[orig]);
200 putship(sp->shp_uid, sp);
203 dir = chkdir(sp->shp_rpath[0], DIR_STOP, DIR_LAST);
204 memmove(sp->shp_rpath, sp->shp_rpath+1, sizeof(sp->shp_rpath) - 1);
205 if (dir == DIR_STOP || CANT_HAPPEN(dir < 0))
210 mcp = &mchr[(int)sp->shp_type];
211 newx = xnorm(sp->shp_x + dx);
212 newy = ynorm(sp->shp_y + dy);
213 mobcost = shp_mobcost(sp);
215 getsect(newx, newy, §);
216 if (shp_check_nav(sp, §) != NAVOK ||
218 && relations_with(sect.sct_own, sp->shp_own) < FRIENDLY)) {
219 wu(0, sp->shp_own, "%s %s,\nbut could not retreat to %s!\n",
220 prship(sp), conditions[findcondition(code)].desc[orig],
221 xyas(newx, newy, sp->shp_own));
223 putship(sp->shp_uid, sp);
228 sp->shp_mobil -= mobcost;
231 mines = sect.sct_mines;
233 if (sect.sct_type != SCT_WATER || mines <= 0)
235 if (mcp->m_flags & M_SWEEP) {
236 max = mcp->m_item[I_SHELL];
237 shells = sp->shp_item[I_SHELL];
238 for (m = 0; mines > 0 && m < 5; m++) {
241 shells = MIN(max, shells + 1);
242 changed |= map_set(sp->shp_own, sp->shp_x, sp->shp_y,
246 if (sect.sct_mines != mines) {
248 "%s cleared %d mine%s in %s while retreating\n",
249 prship(sp), sect.sct_mines - mines,
250 splur(sect.sct_mines - mines),
251 xyas(newx, newy, sp->shp_own));
252 sect.sct_mines = mines;
253 sp->shp_item[I_SHELL] = shells;
257 writemap(sp->shp_own);
259 if (chance(DMINE_HITCHANCE(mines))) {
261 "%s %s,\nand hit a mine in %s while retreating!\n",
262 prship(sp), conditions[findcondition(code)].desc[orig],
263 xyas(newx, newy, sp->shp_own));
264 nreport(sp->shp_own, N_HIT_MINE, 0, 1);
268 if (map_set(sp->shp_own, sp->shp_x, sp->shp_y, 'X', 0))
269 writemap(sp->shp_own);
270 sect.sct_mines = mines;
273 putship(sp->shp_uid, sp);
279 wu(0, sp->shp_own, "%s %s, and retreated to %s\n",
280 prship(sp), conditions[findcondition(code)].desc[orig],
281 xyas(sp->shp_x, sp->shp_y, sp->shp_own));
283 wu(0, sp->shp_own, "%s %s, and ended up at %s\n",
285 conditions[findcondition(code)].desc[orig],
286 xyas(sp->shp_x, sp->shp_y, sp->shp_own));
289 putship(sp->shp_uid, sp);
294 findcondition(char code)
298 for (i = 0; conditions[i].code && conditions[i].code != code; i++) ;
299 CANT_HAPPEN(!conditions[i].code);
304 check_retreat_and_do_landdamage(struct lndstr *lp, int dam)
310 if (lp->lnd_rflags & RET_INJURED)
311 retreat_land(lp, 'i');
317 retreat_land(struct lndstr *lp, char code)
322 if (lp->lnd_effic < LAND_MINEFF || CANT_HAPPEN(!lp->lnd_own))
324 if (lp->lnd_own == player->cnum)
327 retreat_land1(lp, code, 1);
328 if (lp->lnd_rpath[0] == 0)
331 if (lp->lnd_rflags & RET_GROUP) {
332 snxtitem_group(&ni, EF_LAND, lp->lnd_army);
333 while (nxtitem(&ni, &land))
334 if (land.lnd_own == lp->lnd_own) {
335 if (land.lnd_uid != lp->lnd_uid) {
336 retreat_land1(&land, code, 0);
337 getland(land.lnd_uid, &land);
338 if (land.lnd_rpath[0] == 0) {
340 putland(land.lnd_uid, &land);
348 retreat_land1(struct lndstr *lp, char code, int orig)
351 /* Is this the originally scared unit, or a follower */
367 getsect(lp->lnd_x, lp->lnd_y, §);
369 if (lp->lnd_mobil <= 0.0) {
371 "%s %s,\nbut had no mobility, and couldn't retreat!\n",
372 prland(lp), conditions[findcondition(code)].desc[orig]);
376 for (i = 0; i < MAX_RETREAT && lp->lnd_rpath[0]; i++) {
377 if (lp->lnd_mobil <= 0.0) {
379 "%s %s,\nbut ran out of mobility, and couldn't retreat fully!\n",
380 prland(lp), conditions[findcondition(code)].desc[orig]);
382 putland(lp->lnd_uid, lp);
385 dir = chkdir(lp->lnd_rpath[0], DIR_STOP, DIR_LAST);
386 memmove(lp->lnd_rpath, lp->lnd_rpath+1, sizeof(lp->lnd_rpath) - 1);
387 if (dir == DIR_STOP || CANT_HAPPEN(dir < 0))
392 lcp = &lchr[(int)lp->lnd_type];
393 newx = xnorm(lp->lnd_x + dx);
394 newy = ynorm(lp->lnd_y + dy);
396 getsect(newx, newy, §);
397 mobcost = lnd_mobcost(lp, §);
399 || sect.sct_type == SCT_MOUNT
400 || sect.sct_own != lp->lnd_own) {
401 wu(0, lp->lnd_own, "%s %s,\nbut could not retreat to %s!\n",
403 conditions[findcondition(code)].desc[orig],
404 xyas(newx, newy, lp->lnd_own));
406 putland(lp->lnd_uid, lp);
411 lp->lnd_mobil -= mobcost;
414 mines = SCT_LANDMINES(§);
415 if (mines <= 0 || sect.sct_oldown == lp->lnd_own)
417 if (lcp->l_flags & L_ENGINEER) {
418 max = lcp->l_item[I_SHELL];
419 shells = lp->lnd_item[I_SHELL];
420 for (m = 0; mines > 0 && m < 5; m++) {
423 shells = MIN(max, shells + 1);
426 sect.sct_mines = mines;
427 lp->lnd_item[I_SHELL] = shells;
430 if (chance(DMINE_LHITCHANCE(mines))) {
432 "%s %s,\nand hit a mine in %s while retreating!\n",
434 conditions[findcondition(code)].desc[orig],
435 xyas(newx, newy, lp->lnd_own));
436 nreport(lp->lnd_own, N_LHIT_MINE, 0, 1);
438 if (lcp->l_flags & L_ENGINEER)
442 sect.sct_mines = mines;
445 putland(lp->lnd_uid, lp);
451 wu(0, lp->lnd_own, "%s %s, and retreated to %s\n",
453 conditions[findcondition(code)].desc[orig],
454 xyas(lp->lnd_x, lp->lnd_y, lp->lnd_own));
456 wu(0, lp->lnd_own, "%s %s, and ended up at %s\n",
458 conditions[findcondition(code)].desc[orig],
459 xyas(lp->lnd_x, lp->lnd_y, lp->lnd_own));
462 putland(lp->lnd_uid, lp);