2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2015, 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 retreat_ship(struct shpstr *sp, char code)
87 if (CANT_HAPPEN(!sp->shp_own))
89 if (sp->shp_own == player->cnum)
92 retreat_ship1(sp, code, 1);
94 if (sp->shp_rflags & RET_GROUP) {
95 snxtitem_group(&ni, EF_SHIP, sp->shp_fleet);
96 while (nxtitem(&ni, &ship)) {
97 if (ship.shp_own != sp->shp_own || ship.shp_uid == sp->shp_uid)
99 if (retreat_ship1(&ship, code, 0))
100 putship(ship.shp_uid, &ship);
106 retreat_ship1(struct shpstr *sp, char code, int orig)
109 /* Is this the originally scared ship, or a follower */
126 if (sp->shp_effic < SHIP_MINEFF) {
128 "%s %s,\nbut it died in the attack, and so couldn't retreat!\n",
129 prship(sp), conditions[findcondition(code)].desc[orig]);
131 putship(sp->shp_uid, sp);
135 /* check crew - uws don't count */
136 if (sp->shp_item[I_MILIT] == 0 && sp->shp_item[I_CIVIL] == 0) {
138 "%s %s,\nbut had no crew, and couldn't retreat!\n", prship(sp),
139 conditions[findcondition(code)].desc[orig]);
143 getsect(sp->shp_x, sp->shp_y, §);
144 switch (shp_check_nav(sp, §)) {
147 case SHP_STUCK_CONSTRUCTION:
149 "%s %s,\nbut was caught in a construction zone, and couldn't retreat!\n",
150 prship(sp), conditions[findcondition(code)].desc[orig]);
155 case SHP_STUCK_CANAL:
156 case SHP_STUCK_IMPASSABLE:
158 "%s %s,\nbut was landlocked, and couldn't retreat!\n",
159 prship(sp), conditions[findcondition(code)].desc[orig]);
163 if (sp->shp_mobil <= 0.0) {
165 "%s %s,\nbut had no mobility, and couldn't retreat!\n",
166 prship(sp), conditions[findcondition(code)].desc[orig]);
170 for (i = 0; i < MAX_RETREAT && sp->shp_rpath[0]; i++) {
171 if (sp->shp_mobil <= 0.0) {
173 "%s %s,\nbut ran out of mobility, and couldn't retreat fully!\n",
174 prship(sp), conditions[findcondition(code)].desc[orig]);
177 dir = chkdir(sp->shp_rpath[0], DIR_STOP, DIR_LAST);
178 if (dir == DIR_STOP || CANT_HAPPEN(dir < 0)) {
179 memmove(sp->shp_rpath, sp->shp_rpath + 1,
180 sizeof(sp->shp_rpath) - 1);
181 if (sp->shp_rpath[0] == 0)
188 mcp = &mchr[(int)sp->shp_type];
189 newx = xnorm(sp->shp_x + dx);
190 newy = ynorm(sp->shp_y + dy);
191 mobcost = shp_mobcost(sp);
193 getsect(newx, newy, §);
194 if (shp_check_nav(sp, §) != SHP_STUCK_NOT ||
196 && relations_with(sect.sct_own, sp->shp_own) < FRIENDLY)) {
197 wu(0, sp->shp_own, "%s %s,\nbut could not retreat to %s!\n",
198 prship(sp), conditions[findcondition(code)].desc[orig],
199 xyas(newx, newy, sp->shp_own));
204 sp->shp_mobil -= mobcost;
206 memmove(sp->shp_rpath, sp->shp_rpath + 1,
207 sizeof(sp->shp_rpath) - 1);
208 if (sp->shp_rpath[0] == 0)
211 mines = sect.sct_mines;
213 if (sect.sct_type != SCT_WATER || mines <= 0)
215 if (mcp->m_flags & M_SWEEP) {
216 max = mcp->m_item[I_SHELL];
217 shells = sp->shp_item[I_SHELL];
218 for (m = 0; mines > 0 && m < 5; m++) {
221 shells = MIN(max, shells + 1);
222 changed |= map_set(sp->shp_own, sp->shp_x, sp->shp_y,
226 if (sect.sct_mines != mines) {
228 "%s cleared %d mine%s in %s while retreating\n",
229 prship(sp), sect.sct_mines - mines,
230 splur(sect.sct_mines - mines),
231 xyas(newx, newy, sp->shp_own));
232 sect.sct_mines = mines;
233 sp->shp_item[I_SHELL] = shells;
237 writemap(sp->shp_own);
239 if (chance(DMINE_HITCHANCE(mines))) {
241 "%s %s,\nand hit a mine in %s while retreating!\n",
242 prship(sp), conditions[findcondition(code)].desc[orig],
243 xyas(newx, newy, sp->shp_own));
244 nreport(sp->shp_own, N_HIT_MINE, 0, 1);
248 if (map_set(sp->shp_own, sp->shp_x, sp->shp_y, 'X', 0))
249 writemap(sp->shp_own);
250 sect.sct_mines = mines;
257 wu(0, sp->shp_own, "%s %s, and retreated to %s\n",
258 prship(sp), conditions[findcondition(code)].desc[orig],
259 xyas(sp->shp_x, sp->shp_y, sp->shp_own));
261 wu(0, sp->shp_own, "%s %s, and ended up at %s\n",
263 conditions[findcondition(code)].desc[orig],
264 xyas(sp->shp_x, sp->shp_y, sp->shp_own));
271 findcondition(char code)
275 for (i = 0; conditions[i].code && conditions[i].code != code; i++) ;
276 CANT_HAPPEN(!conditions[i].code);
281 retreat_land(struct lndstr *lp, char code)
286 if (CANT_HAPPEN(!lp->lnd_own))
288 if (lp->lnd_own == player->cnum)
291 retreat_land1(lp, code, 1);
293 if (lp->lnd_rflags & RET_GROUP) {
294 snxtitem_group(&ni, EF_LAND, lp->lnd_army);
295 while (nxtitem(&ni, &land)) {
296 if (land.lnd_own != lp->lnd_own || land.lnd_uid == lp->lnd_uid)
298 if (retreat_land1(&land, code, 0))
299 putland(land.lnd_uid, &land);
305 retreat_land1(struct lndstr *lp, char code, int orig)
308 /* Is this the originally scared unit, or a follower */
324 if (lp->lnd_effic < LAND_MINEFF) {
326 "%s %s,\nbut it died in the attack, and so couldn't retreat!\n",
327 prland(lp), conditions[findcondition(code)].desc[orig]);
329 putland(lp->lnd_uid, lp);
333 getsect(lp->lnd_x, lp->lnd_y, §);
335 if (lp->lnd_mobil <= 0.0) {
337 "%s %s,\nbut had no mobility, and couldn't retreat!\n",
338 prland(lp), conditions[findcondition(code)].desc[orig]);
342 for (i = 0; i < MAX_RETREAT && lp->lnd_rpath[0]; i++) {
343 if (lp->lnd_mobil <= 0.0) {
345 "%s %s,\nbut ran out of mobility, and couldn't retreat fully!\n",
346 prland(lp), conditions[findcondition(code)].desc[orig]);
349 dir = chkdir(lp->lnd_rpath[0], DIR_STOP, DIR_LAST);
350 if (dir == DIR_STOP || CANT_HAPPEN(dir < 0)) {
351 memmove(lp->lnd_rpath, lp->lnd_rpath + 1,
352 sizeof(lp->lnd_rpath) - 1);
353 if (lp->lnd_rpath[0] == 0)
360 lcp = &lchr[(int)lp->lnd_type];
361 newx = xnorm(lp->lnd_x + dx);
362 newy = ynorm(lp->lnd_y + dy);
364 getsect(newx, newy, §);
365 mobcost = lnd_mobcost(lp, §);
367 || sect.sct_type == SCT_MOUNT
368 || sect.sct_own != lp->lnd_own) {
369 wu(0, lp->lnd_own, "%s %s,\nbut could not retreat to %s!\n",
371 conditions[findcondition(code)].desc[orig],
372 xyas(newx, newy, lp->lnd_own));
377 lp->lnd_mobil -= mobcost;
379 memmove(lp->lnd_rpath, lp->lnd_rpath + 1,
380 sizeof(lp->lnd_rpath) - 1);
381 if (lp->lnd_rpath[0] == 0)
384 mines = SCT_LANDMINES(§);
385 if (mines <= 0 || sect.sct_oldown == lp->lnd_own)
387 if (lcp->l_flags & L_ENGINEER) {
388 max = lcp->l_item[I_SHELL];
389 shells = lp->lnd_item[I_SHELL];
390 for (m = 0; mines > 0 && m < 5; m++) {
393 shells = MIN(max, shells + 1);
396 sect.sct_mines = mines;
397 lp->lnd_item[I_SHELL] = shells;
400 if (chance(DMINE_LHITCHANCE(mines))) {
402 "%s %s,\nand hit a mine in %s while retreating!\n",
404 conditions[findcondition(code)].desc[orig],
405 xyas(newx, newy, lp->lnd_own));
406 nreport(lp->lnd_own, N_LHIT_MINE, 0, 1);
408 if (lcp->l_flags & L_ENGINEER)
412 sect.sct_mines = mines;
419 wu(0, lp->lnd_own, "%s %s, and retreated to %s\n",
421 conditions[findcondition(code)].desc[orig],
422 xyas(lp->lnd_x, lp->lnd_y, lp->lnd_own));
424 wu(0, lp->lnd_own, "%s %s, and ended up at %s\n",
426 conditions[findcondition(code)].desc[orig],
427 xyas(lp->lnd_x, lp->lnd_y, lp->lnd_own));