/*
* Empire - A multi-player, client/server Internet based war game.
- * Copyright (C) 1986-2013, Dave Pare, Jeff Bailey, Thomas Ruschak,
+ * Copyright (C) 1986-2021, Dave Pare, Jeff Bailey, Thomas Ruschak,
* Ken Stevens, Steve McClure, Markus Armbruster
*
* Empire is free software: you can redistribute it and/or modify
*
* Known contributors to this file:
* Steve McClure, 1998
- * Markus Armbruster, 2004-2010
+ * Markus Armbruster, 2004-2014
*/
#include <config.h>
-#include "file.h"
#include "land.h"
#include "misc.h"
#include "nsc.h"
static void knockdown(struct sctstr *);
/*
- * Check bridges at and around SP after damage to SP.
- * If SP is an inefficent bridge, splash it.
- * If SP can't support a bridge, splash unsupported adjacent bridges.
- * Write back splashed bridges, except for SP; writing that one is
+ * Is there support for a bridge at @sp?
+ * Ignore support coming from direction @ignore_dir.
+ */
+int
+bridge_support_at(struct sctstr *sp, int ignore_dir)
+{
+ int i, nx, ny;
+ struct sctstr sect;
+
+ for (i = 1; i <= 6; i++) {
+ if (i == ignore_dir)
+ continue;
+ nx = sp->sct_x + diroff[i][0];
+ ny = sp->sct_y + diroff[i][1];
+ getsect(nx, ny, §);
+ if (opt_EASY_BRIDGES
+ && sect.sct_type != SCT_WATER && sect.sct_type != SCT_BSPAN)
+ return 1;
+ if (sect.sct_effic < SCT_MINEFF)
+ continue;
+ if (sect.sct_type == SCT_BHEAD && sect.sct_newtype == SCT_BHEAD)
+ return 1;
+ if (sect.sct_type == SCT_BTOWER)
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * Check bridges at and around @sp after damage to @sp.
+ * If @sp is an inefficent bridge, splash it.
+ * If @sp can't support a bridge, splash unsupported adjacent bridges.
+ * Write back splashed bridges, except for @sp; writing that one is
* left to the caller.
*/
void
des = sp->sct_type;
if (des == SCT_BSPAN || des == SCT_BTOWER)
knockdown(sp);
- if ((des == SCT_BHEAD || des == SCT_BTOWER) && !opt_EASY_BRIDGES)
+ if ((des == SCT_BHEAD && !opt_EASY_BRIDGES) || des == SCT_BTOWER)
bridgefall(sp);
}
bridgefall(struct sctstr *sp)
{
int i;
- int j;
struct sctstr sect;
- struct sctstr bh_sect;
int nx;
int ny;
- int nnx;
- int nny;
-
- if (CANT_HAPPEN(opt_EASY_BRIDGES))
- return;
for (i = 1; i <= 6; i++) {
nx = sp->sct_x + diroff[i][0];
ny = sp->sct_y + diroff[i][1];
getsect(nx, ny, §);
- if (sect.sct_type != SCT_BSPAN)
- continue;
- for (j = 1; j <= 6; j++) {
- nnx = nx + diroff[j][0];
- nny = ny + diroff[j][1];
- if (nnx == sp->sct_x && nny == sp->sct_y)
- continue;
- getsect(nnx, nny, &bh_sect);
- if (bh_sect.sct_type == SCT_BHEAD &&
- bh_sect.sct_newtype == SCT_BHEAD)
- break;
- if (bh_sect.sct_type == SCT_BTOWER)
- break;
- }
- if (j > 6) {
+ if (sect.sct_type == SCT_BSPAN
+ && !bridge_support_at(§, DIR_BACK(i))) {
knockdown(§);
putsect(§);
}