2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2007, 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:
42 static int do_look(short type);
43 static void look_ship(struct shpstr *lookship);
44 static void look_land(struct lndstr *lookland);
49 return do_look(EF_SHIP);
55 return do_look(EF_LAND);
63 union empobj_storage unit;
68 unsigned char *bitmap;
71 if (!snxtitem(&ni, type, player->argp[1]))
73 if ((bitmap = malloc((WORLD_X * WORLD_Y) / 8)) == 0) {
74 logerror("malloc failed in do_look\n");
75 pr("Memory error. Tell the deity.\n");
78 memset(bitmap, 0, (WORLD_X * WORLD_Y) / 8);
79 while (nxtitem(&ni, &unit)) {
82 if (type == EF_LAND) {
83 if (unit.land.lnd_ship >= 0)
85 if (unit.land.lnd_land >= 0)
87 /* Spies don't need military to do a "llook". Other
89 if ((unit.land.lnd_item[I_MILIT] <= 0) &&
90 !(lchr[(int)unit.land.lnd_type].l_flags & L_SPY))
92 look_land(&unit.land);
94 look_ship(&unit.ship);
95 for (i = 0; i <= 6; i++) {
96 x = diroff[i][0] + unit.gen.x;
97 y = diroff[i][1] + unit.gen.y;
98 if (emp_getbit(x, y, bitmap))
100 emp_setbit(x, y, bitmap);
101 getsect(x, y, §);
102 if (sect.sct_type == SCT_WATER)
107 pr("%s (#%d) ", cname(sect.sct_own), sect.sct_own);
108 pr("%s", dchr[sect.sct_type].d_name);
109 changed += map_set(player->cnum, x, y,
110 dchr[sect.sct_type].d_mnem, 0);
111 pr(" %d%% efficient ", player->owner ? sect.sct_effic :
112 roundintby((int)sect.sct_effic, 10));
113 civ = sect.sct_item[I_CIVIL];
114 mil = sect.sct_item[I_MILIT];
117 player->owner ? "" : "approx ",
118 player->owner ? civ : roundintby(civ, 10));
121 player->owner ? "" : "approx ",
122 player->owner ? mil : roundintby(mil, 10));
123 pr("@ %s\n", xyas(x, y, player->cnum));
125 setcont(player->cnum, sect.sct_own, FOUND_LOOK);
130 writemap(player->cnum);
136 look_ship(struct shpstr *lookship)
139 struct mchrstr *smcp;
140 struct mchrstr *tmcp;
147 range = (int)techfact(lookship->shp_tech,
148 mchr[(int)lookship->shp_type].m_vrnge);
149 range = range * (lookship->shp_effic / 100.0);
150 smcp = &mchr[(int)lookship->shp_type];
151 if (smcp->m_flags & M_SUB)
152 range = MIN(range, 1);
153 for (i = 0; NULL != (sp = getshipp(i)); i++) {
154 if (sp->shp_own == player->cnum || sp->shp_own == 0)
156 dist = mapdist(sp->shp_x, sp->shp_y,
157 lookship->shp_x, lookship->shp_y);
158 if (dist > ship_max_interdiction_range)
160 tmcp = &mchr[(int)sp->shp_type];
161 if (smcp->m_flags & M_SUB)
162 vrange = (int)(sp->shp_visib * range / 30.0);
164 vrange = (int)(sp->shp_visib * range / 20.0);
165 getsect(sp->shp_x, sp->shp_y, §);
166 if (sect.sct_type != SCT_WATER)
167 vrange = MAX(1, vrange);
170 if (smcp->m_flags & M_SUB) {
171 if (tmcp->m_flags & M_SONAR && dist < 2) {
172 if (sp->shp_own != 0)
174 "%s detected surfacing noises in %s.\n",
176 xyas(lookship->shp_x, lookship->shp_y,
179 if (dist == 0 && (tmcp->m_flags & M_SUB) == 0)
180 if (sp->shp_own != 0)
182 "Periscope spotted in %s by %s\n",
183 xyas(lookship->shp_x, lookship->shp_y,
184 sp->shp_own), prship(sp));
186 /* subs at sea only seen by sonar */
187 if (tmcp->m_flags & M_SUB && sect.sct_type == SCT_WATER)
189 pr("%s (#%d) %s @ %s\n",
190 cname(sp->shp_own), sp->shp_own, prship(sp),
191 xyas(sp->shp_x, sp->shp_y, player->cnum));
193 setcont(player->cnum, sp->shp_own, FOUND_LOOK);
198 look_land(struct lndstr *lookland)
208 drange = techfact(lookland->lnd_tech, lookland->lnd_spy);
209 drange *= lookland->lnd_effic / 100.0;
210 range = ldround(drange, 1);
215 for (i = 0; NULL != (lp = getlandp(i)); i++) {
216 if (lp->lnd_own == player->cnum || lp->lnd_own == 0)
218 if (lp->lnd_ship >= 0)
220 /* Don't always see spies */
221 if (lchr[(int)lp->lnd_type].l_flags & L_SPY) {
222 /* If it's on a ship or unit, assume it's hidden
223 enough not to be seen */
224 if (lp->lnd_ship >= 0 || lp->lnd_land >= 0)
226 if (!(chance(LND_SPY_DETECT_CHANCE(lp->lnd_effic))))
229 vrange = ldround((lp->lnd_vis * range) / 20.0, 1);
230 dist = mapdist(lp->lnd_x, lp->lnd_y,
231 lookland->lnd_x, lookland->lnd_y);
235 pr("%s (#%d) %s (approx %d mil) @ %s\n",
236 cname(lp->lnd_own), lp->lnd_own,
237 prland(lp), roundintby(lp->lnd_item[I_MILIT], 20),
238 xyas(lp->lnd_x, lp->lnd_y, player->cnum));
240 setcont(player->cnum, lp->lnd_own, FOUND_LOOK);
242 for (i = 0; NULL != (pp = getplanep(i)); i++) {
243 if (pp->pln_own == player->cnum || pp->pln_own == 0)
245 if (pp->pln_ship >= 0)
247 if (pp->pln_flags & PLN_LAUNCHED)
249 vrange = ldround((10 * range) / 20.0, 1);
250 dist = mapdist(pp->pln_x, pp->pln_y,
251 lookland->lnd_x, lookland->lnd_y);
255 pr("%s (#%d) %s @ %s\n",
256 cname(pp->pln_own), pp->pln_own,
257 prplane(pp), xyas(pp->pln_x, pp->pln_y, player->cnum));
259 setcont(player->cnum, pp->pln_own, FOUND_LOOK);