2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2013, 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 * bridgefall.c: Knock a bridge down
29 * Known contributors to this file:
31 * Markus Armbruster, 2004-2010
45 #include "prototypes.h"
49 static void knockdown(struct sctstr *);
52 * Check bridges at and around SP after damage to SP.
53 * If SP is an inefficent bridge, splash it.
54 * If SP can't support a bridge, splash unsupported adjacent bridges.
55 * Write back splashed bridges, except for SP; writing that one is
59 bridge_damaged(struct sctstr *sp)
63 if (sp->sct_effic >= SCT_MINEFF)
67 if (des == SCT_BSPAN || des == SCT_BTOWER)
69 if ((des == SCT_BHEAD || des == SCT_BTOWER) && !opt_EASY_BRIDGES)
74 bridgefall(struct sctstr *sp)
79 struct sctstr bh_sect;
85 if (CANT_HAPPEN(opt_EASY_BRIDGES))
88 for (i = 1; i <= 6; i++) {
89 nx = sp->sct_x + diroff[i][0];
90 ny = sp->sct_y + diroff[i][1];
91 getsect(nx, ny, §);
92 if (sect.sct_type != SCT_BSPAN)
94 for (j = 1; j <= 6; j++) {
95 nnx = nx + diroff[j][0];
96 nny = ny + diroff[j][1];
97 if (nnx == sp->sct_x && nny == sp->sct_y)
99 getsect(nnx, nny, &bh_sect);
100 if (bh_sect.sct_type == SCT_BHEAD &&
101 bh_sect.sct_newtype == SCT_BHEAD)
103 if (bh_sect.sct_type == SCT_BTOWER)
113 /* Knock down a bridge span. Note that this does NOT write the
114 * sector out to the database, it's up to the caller to do that. */
116 knockdown(struct sctstr *sp)
124 "Crumble... SCREEEECH! Splash! Bridge%s falls at %s!\n",
125 sp->sct_type == SCT_BTOWER ? " tower" : "",
126 xyas(sp->sct_x, sp->sct_y, sp->sct_own));
127 if (!SCT_MINES_ARE_SEAMINES(sp))
129 sp->sct_type = SCT_WATER;
130 sp->sct_newtype = SCT_WATER;
136 /* Sink all the units */
137 snxtitem_xy(&ni, EF_LAND, sp->sct_x, sp->sct_y);
138 while (nxtitem(&ni, &land)) {
139 if (land.lnd_own == 0)
141 if (land.lnd_ship >= 0)
143 mpr(land.lnd_own, " AARGH! %s tumbles to its doom!\n",
146 putland(land.lnd_uid, &land);
148 /* Sink all the planes */
149 snxtitem_xy(&ni, EF_PLANE, sp->sct_x, sp->sct_y);
150 while (nxtitem(&ni, &plane)) {
151 if (plane.pln_own == 0)
153 if (plane.pln_flags & PLN_LAUNCHED)
155 if (plane.pln_ship >= 0)
157 mpr(plane.pln_own, " AARGH! %s tumbles to its doom!\n",
160 putplane(plane.pln_uid, &plane);
162 /* Sink all the nukes */
163 snxtitem_xy(&ni, EF_NUKE, sp->sct_x, sp->sct_y);
164 while (nxtitem(&ni, &nuke)) {
165 if (nuke.nuk_own == 0)
167 if (nuke.nuk_plane >= 0)
169 mpr(nuke.nuk_own, " %s sinks to the bottom of the sea!\n",
172 putnuke(nuke.nuk_uid, &nuke);
174 memset(sp->sct_item, 0, sizeof(sp->sct_item));
175 memset(sp->sct_del, 0, sizeof(sp->sct_del));
176 memset(sp->sct_dist, 0, sizeof(sp->sct_dist));
177 sp->sct_pstage = PLG_HEALTHY;
180 sp->sct_che_target = 0;