269 lines
7.2 KiB
C
269 lines
7.2 KiB
C
/*
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* Empire - A multi-player, client/server Internet based war game.
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* Copyright (C) 1986-2010, Dave Pare, Jeff Bailey, Thomas Ruschak,
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* Ken Stevens, Steve McClure
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* ---
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*
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* See files README, COPYING and CREDITS in the root of the source
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* tree for related information and legal notices. It is expected
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* that future projects/authors will amend these files as needed.
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*
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* ---
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*
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* look.c: Lookout from a ship or land unit
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*
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* Known contributors to this file:
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* Ron Koenderink, 2006-2007
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*/
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#include <config.h>
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#include "commands.h"
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#include "empobj.h"
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#include "map.h"
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#include "optlist.h"
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#include "path.h"
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static void look_ship(struct shpstr *lookship);
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static void look_land(struct lndstr *lookland);
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int
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look(void)
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{
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return do_look(EF_SHIP);
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}
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int
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llook(void)
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{
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return do_look(EF_LAND);
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}
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int
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do_look(int type)
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{
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int i;
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struct nstr_item ni;
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union empobj_storage unit;
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struct sctstr sect;
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int x, y;
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unsigned char *bitmap;
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int changed = 0;
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if (CANT_HAPPEN(type != EF_LAND && type != EF_SHIP))
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type = EF_SHIP;
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if (!snxtitem(&ni, type, player->argp[1], NULL))
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return RET_SYN;
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bitmap = calloc(WORLD_SZ() / 8, 1);
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if (!bitmap) {
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logerror("malloc failed in do_look\n");
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pr("Memory error. Tell the deity.\n");
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return RET_FAIL;
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}
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while (nxtitem(&ni, &unit)) {
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if (!player->owner)
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continue;
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if (type == EF_LAND) {
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if (unit.land.lnd_ship >= 0)
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continue;
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if (unit.land.lnd_land >= 0)
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continue;
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/* Spies don't need military to do a "llook". Other
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units do */
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if ((unit.land.lnd_item[I_MILIT] <= 0) &&
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!(lchr[(int)unit.land.lnd_type].l_flags & L_SPY))
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continue;
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look_land(&unit.land);
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} else
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look_ship(&unit.ship);
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for (i = 0; i <= 6; i++) {
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x = diroff[i][0] + unit.gen.x;
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y = diroff[i][1] + unit.gen.y;
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if (emp_getbit(x, y, bitmap))
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continue;
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emp_setbit(x, y, bitmap);
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getsect(x, y, §);
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if (sect.sct_type == SCT_WATER)
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continue;
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look_at_sect(§, 10);
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changed += map_set(player->cnum, x, y,
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dchr[sect.sct_type].d_mnem, 0);
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if (opt_HIDDEN) {
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setcont(player->cnum, sect.sct_own, FOUND_LOOK);
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}
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}
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}
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if (changed)
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writemap(player->cnum);
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free(bitmap);
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return RET_OK;
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}
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void look_at_sect(struct sctstr *sp, int mult)
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{
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int civ, mil;
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int ours = player->god || sp->sct_own == player->cnum;
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if (sp->sct_own == player->cnum)
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pr("Your ");
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else
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pr("%s (#%d) ", cname(sp->sct_own), sp->sct_own);
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pr("%s", dchr[sp->sct_type].d_name);
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pr(" %d%% efficient ",
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ours ? sp->sct_effic : roundintby(sp->sct_effic, mult));
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civ = sp->sct_item[I_CIVIL];
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mil = sp->sct_item[I_MILIT];
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if (civ)
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pr("with %s%d civ ",
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ours ? "" : "approx ",
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ours ? civ : roundintby(civ, mult));
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if (mil)
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pr("with %s%d mil ",
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ours ? "" : "approx ",
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ours ? mil : roundintby(mil, mult));
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pr("@ %s\n", xyas(sp->sct_x, sp->sct_y, player->cnum));
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}
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static void
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look_ship(struct shpstr *lookship)
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{
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struct shpstr *sp;
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struct mchrstr *smcp;
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struct mchrstr *tmcp;
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struct sctstr sect;
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int range;
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int vrange;
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int i;
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int dist;
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range = (int)techfact(lookship->shp_tech,
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mchr[(int)lookship->shp_type].m_vrnge);
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range = range * (lookship->shp_effic / 100.0);
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smcp = &mchr[(int)lookship->shp_type];
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if (smcp->m_flags & M_SUB)
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range = MIN(range, 1);
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for (i = 0; NULL != (sp = getshipp(i)); i++) {
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if (sp->shp_own == player->cnum || sp->shp_own == 0)
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continue;
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dist = mapdist(sp->shp_x, sp->shp_y,
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lookship->shp_x, lookship->shp_y);
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if (dist > ship_max_interdiction_range)
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continue;
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tmcp = &mchr[(int)sp->shp_type];
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if (smcp->m_flags & M_SUB)
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vrange = (int)(shp_visib(sp) * range / 30.0);
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else
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vrange = (int)(shp_visib(sp) * range / 20.0);
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getsect(sp->shp_x, sp->shp_y, §);
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if (sect.sct_type != SCT_WATER)
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vrange = MAX(1, vrange);
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if (dist > vrange)
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continue;
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if (smcp->m_flags & M_SUB) {
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if (tmcp->m_flags & M_SONAR && dist < 2) {
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if (sp->shp_own != 0)
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wu(0, sp->shp_own,
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"%s detected surfacing noises in %s.\n",
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prship(sp),
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xyas(lookship->shp_x, lookship->shp_y,
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sp->shp_own));
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}
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if (dist == 0 && (tmcp->m_flags & M_SUB) == 0)
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if (sp->shp_own != 0)
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wu(0, sp->shp_own,
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"Periscope spotted in %s by %s\n",
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xyas(lookship->shp_x, lookship->shp_y,
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sp->shp_own), prship(sp));
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}
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/* subs at sea only seen by sonar */
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if (tmcp->m_flags & M_SUB && sect.sct_type == SCT_WATER)
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continue;
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pr("%s (#%d) %s @ %s\n",
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cname(sp->shp_own), sp->shp_own, prship(sp),
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xyas(sp->shp_x, sp->shp_y, player->cnum));
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if (opt_HIDDEN)
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setcont(player->cnum, sp->shp_own, FOUND_LOOK);
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}
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}
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static void
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look_land(struct lndstr *lookland)
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{
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struct plnstr *pp;
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struct lndstr *lp;
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double drange;
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int range;
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int vrange;
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int i;
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int dist;
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drange = techfact(lookland->lnd_tech, lchr[lookland->lnd_type].l_spy);
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drange *= lookland->lnd_effic / 100.0;
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range = ldround(drange, 1);
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if (range == 0)
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return;
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for (i = 0; NULL != (lp = getlandp(i)); i++) {
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if (lp->lnd_own == player->cnum || lp->lnd_own == 0)
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continue;
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if (lp->lnd_ship >= 0)
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continue;
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/* Don't always see spies */
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if (lchr[(int)lp->lnd_type].l_flags & L_SPY) {
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/* If it's on a ship or unit, assume it's hidden
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enough not to be seen */
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if (lp->lnd_ship >= 0 || lp->lnd_land >= 0)
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continue;
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if (!(chance(LND_SPY_DETECT_CHANCE(lp->lnd_effic))))
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continue;
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}
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vrange = ldround((lnd_vis(lp) * range) / 20.0, 1);
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dist = mapdist(lp->lnd_x, lp->lnd_y,
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lookland->lnd_x, lookland->lnd_y);
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if (dist > vrange)
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continue;
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pr("%s (#%d) %s (approx %d mil) @ %s\n",
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cname(lp->lnd_own), lp->lnd_own,
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prland(lp), roundintby(lp->lnd_item[I_MILIT], 20),
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xyas(lp->lnd_x, lp->lnd_y, player->cnum));
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if (opt_HIDDEN)
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setcont(player->cnum, lp->lnd_own, FOUND_LOOK);
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}
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for (i = 0; NULL != (pp = getplanep(i)); i++) {
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if (pp->pln_own == player->cnum || pp->pln_own == 0)
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continue;
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if (pp->pln_ship >= 0)
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continue;
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if (pp->pln_flags & PLN_LAUNCHED)
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continue;
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vrange = ldround((10 * range) / 20.0, 1);
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dist = mapdist(pp->pln_x, pp->pln_y,
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lookland->lnd_x, lookland->lnd_y);
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if (dist > vrange)
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continue;
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pr("%s (#%d) %s @ %s\n",
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cname(pp->pln_own), pp->pln_own,
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prplane(pp), xyas(pp->pln_x, pp->pln_y, player->cnum));
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if (opt_HIDDEN)
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setcont(player->cnum, pp->pln_own, FOUND_LOOK);
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}
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}
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