2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2014, 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, 2004-2014
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 && !opt_EASY_BRIDGES) || des == SCT_BTOWER)
74 bridgefall(struct sctstr *sp)
79 struct sctstr bh_sect;
85 for (i = 1; i <= 6; i++) {
86 nx = sp->sct_x + diroff[i][0];
87 ny = sp->sct_y + diroff[i][1];
88 getsect(nx, ny, §);
89 if (sect.sct_type != SCT_BSPAN)
91 for (j = 1; j <= 6; j++) {
94 nnx = nx + diroff[j][0];
95 nny = ny + diroff[j][1];
96 getsect(nnx, nny, &bh_sect);
97 /* With EASY_BRIDGES, it just has to be next to any
99 if (opt_EASY_BRIDGES) {
100 if (bh_sect.sct_type != SCT_WATER &&
101 bh_sect.sct_type != SCT_BSPAN)
104 if (bh_sect.sct_effic < 20)
106 if (bh_sect.sct_type == SCT_BHEAD &&
107 bh_sect.sct_newtype == SCT_BHEAD)
109 if (bh_sect.sct_type == SCT_BTOWER)
119 /* Knock down a bridge span. Note that this does NOT write the
120 * sector out to the database, it's up to the caller to do that. */
122 knockdown(struct sctstr *sp)
130 "Crumble... SCREEEECH! Splash! Bridge%s falls at %s!\n",
131 sp->sct_type == SCT_BTOWER ? " tower" : "",
132 xyas(sp->sct_x, sp->sct_y, sp->sct_own));
133 if (!SCT_MINES_ARE_SEAMINES(sp))
135 sp->sct_type = SCT_WATER;
136 sp->sct_newtype = SCT_WATER;
142 /* Sink all the units */
143 snxtitem_xy(&ni, EF_LAND, sp->sct_x, sp->sct_y);
144 while (nxtitem(&ni, &land)) {
145 if (land.lnd_own == 0)
147 if (land.lnd_ship >= 0)
149 mpr(land.lnd_own, " AARGH! %s tumbles to its doom!\n",
152 putland(land.lnd_uid, &land);
154 /* Sink all the planes */
155 snxtitem_xy(&ni, EF_PLANE, sp->sct_x, sp->sct_y);
156 while (nxtitem(&ni, &plane)) {
157 if (plane.pln_own == 0)
159 if (plane.pln_flags & PLN_LAUNCHED)
161 if (plane.pln_ship >= 0)
163 mpr(plane.pln_own, " AARGH! %s tumbles to its doom!\n",
166 putplane(plane.pln_uid, &plane);
168 /* Sink all the nukes */
169 snxtitem_xy(&ni, EF_NUKE, sp->sct_x, sp->sct_y);
170 while (nxtitem(&ni, &nuke)) {
171 if (nuke.nuk_own == 0)
173 if (nuke.nuk_plane >= 0)
175 mpr(nuke.nuk_own, " %s sinks to the bottom of the sea!\n",
178 putnuke(nuke.nuk_uid, &nuke);
180 memset(sp->sct_item, 0, sizeof(sp->sct_item));
181 memset(sp->sct_del, 0, sizeof(sp->sct_del));
182 memset(sp->sct_dist, 0, sizeof(sp->sct_dist));
183 sp->sct_pstage = PLG_HEALTHY;
186 sp->sct_che_target = 0;