2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2008, 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 * look.c: Lookout from a ship or land unit
30 * Known contributors to this file:
31 * Ron Koenderink, 2006-2007
42 static void look_ship(struct shpstr *lookship);
43 static void look_land(struct lndstr *lookland);
48 return do_look(EF_SHIP);
54 return do_look(EF_LAND);
62 union empobj_storage unit;
67 unsigned char *bitmap;
70 if (!snxtitem(&ni, type, player->argp[1]))
72 if ((bitmap = malloc((WORLD_X * WORLD_Y) / 8)) == 0) {
73 logerror("malloc failed in do_look\n");
74 pr("Memory error. Tell the deity.\n");
77 memset(bitmap, 0, (WORLD_X * WORLD_Y) / 8);
78 while (nxtitem(&ni, &unit)) {
81 if (type == EF_LAND) {
82 if (unit.land.lnd_ship >= 0)
84 if (unit.land.lnd_land >= 0)
86 /* Spies don't need military to do a "llook". Other
88 if ((unit.land.lnd_item[I_MILIT] <= 0) &&
89 !(lchr[(int)unit.land.lnd_type].l_flags & L_SPY))
91 look_land(&unit.land);
93 look_ship(&unit.ship);
94 for (i = 0; i <= 6; i++) {
95 x = diroff[i][0] + unit.gen.x;
96 y = diroff[i][1] + unit.gen.y;
97 if (emp_getbit(x, y, bitmap))
99 emp_setbit(x, y, bitmap);
100 getsect(x, y, §);
101 if (sect.sct_type == SCT_WATER)
106 pr("%s (#%d) ", cname(sect.sct_own), sect.sct_own);
107 pr("%s", dchr[sect.sct_type].d_name);
108 changed += map_set(player->cnum, x, y,
109 dchr[sect.sct_type].d_mnem, 0);
110 pr(" %d%% efficient ", player->owner ? sect.sct_effic :
111 roundintby((int)sect.sct_effic, 10));
112 civ = sect.sct_item[I_CIVIL];
113 mil = sect.sct_item[I_MILIT];
116 player->owner ? "" : "approx ",
117 player->owner ? civ : roundintby(civ, 10));
120 player->owner ? "" : "approx ",
121 player->owner ? mil : roundintby(mil, 10));
122 pr("@ %s\n", xyas(x, y, player->cnum));
124 setcont(player->cnum, sect.sct_own, FOUND_LOOK);
129 writemap(player->cnum);
135 look_ship(struct shpstr *lookship)
138 struct mchrstr *smcp;
139 struct mchrstr *tmcp;
146 range = (int)techfact(lookship->shp_tech,
147 mchr[(int)lookship->shp_type].m_vrnge);
148 range = range * (lookship->shp_effic / 100.0);
149 smcp = &mchr[(int)lookship->shp_type];
150 if (smcp->m_flags & M_SUB)
151 range = MIN(range, 1);
152 for (i = 0; NULL != (sp = getshipp(i)); i++) {
153 if (sp->shp_own == player->cnum || sp->shp_own == 0)
155 dist = mapdist(sp->shp_x, sp->shp_y,
156 lookship->shp_x, lookship->shp_y);
157 if (dist > ship_max_interdiction_range)
159 tmcp = &mchr[(int)sp->shp_type];
160 if (smcp->m_flags & M_SUB)
161 vrange = (int)(sp->shp_visib * range / 30.0);
163 vrange = (int)(sp->shp_visib * range / 20.0);
164 getsect(sp->shp_x, sp->shp_y, §);
165 if (sect.sct_type != SCT_WATER)
166 vrange = MAX(1, vrange);
169 if (smcp->m_flags & M_SUB) {
170 if (tmcp->m_flags & M_SONAR && dist < 2) {
171 if (sp->shp_own != 0)
173 "%s detected surfacing noises in %s.\n",
175 xyas(lookship->shp_x, lookship->shp_y,
178 if (dist == 0 && (tmcp->m_flags & M_SUB) == 0)
179 if (sp->shp_own != 0)
181 "Periscope spotted in %s by %s\n",
182 xyas(lookship->shp_x, lookship->shp_y,
183 sp->shp_own), prship(sp));
185 /* subs at sea only seen by sonar */
186 if (tmcp->m_flags & M_SUB && sect.sct_type == SCT_WATER)
188 pr("%s (#%d) %s @ %s\n",
189 cname(sp->shp_own), sp->shp_own, prship(sp),
190 xyas(sp->shp_x, sp->shp_y, player->cnum));
192 setcont(player->cnum, sp->shp_own, FOUND_LOOK);
197 look_land(struct lndstr *lookland)
207 drange = techfact(lookland->lnd_tech, lookland->lnd_spy);
208 drange *= lookland->lnd_effic / 100.0;
209 range = ldround(drange, 1);
214 for (i = 0; NULL != (lp = getlandp(i)); i++) {
215 if (lp->lnd_own == player->cnum || lp->lnd_own == 0)
217 if (lp->lnd_ship >= 0)
219 /* Don't always see spies */
220 if (lchr[(int)lp->lnd_type].l_flags & L_SPY) {
221 /* If it's on a ship or unit, assume it's hidden
222 enough not to be seen */
223 if (lp->lnd_ship >= 0 || lp->lnd_land >= 0)
225 if (!(chance(LND_SPY_DETECT_CHANCE(lp->lnd_effic))))
228 vrange = ldround((lp->lnd_vis * range) / 20.0, 1);
229 dist = mapdist(lp->lnd_x, lp->lnd_y,
230 lookland->lnd_x, lookland->lnd_y);
234 pr("%s (#%d) %s (approx %d mil) @ %s\n",
235 cname(lp->lnd_own), lp->lnd_own,
236 prland(lp), roundintby(lp->lnd_item[I_MILIT], 20),
237 xyas(lp->lnd_x, lp->lnd_y, player->cnum));
239 setcont(player->cnum, lp->lnd_own, FOUND_LOOK);
241 for (i = 0; NULL != (pp = getplanep(i)); i++) {
242 if (pp->pln_own == player->cnum || pp->pln_own == 0)
244 if (pp->pln_ship >= 0)
246 if (pp->pln_flags & PLN_LAUNCHED)
248 vrange = ldround((10 * range) / 20.0, 1);
249 dist = mapdist(pp->pln_x, pp->pln_y,
250 lookland->lnd_x, lookland->lnd_y);
254 pr("%s (#%d) %s @ %s\n",
255 cname(pp->pln_own), pp->pln_own,
256 prplane(pp), xyas(pp->pln_x, pp->pln_y, player->cnum));
258 setcont(player->cnum, pp->pln_own, FOUND_LOOK);