1 /*
2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2021, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure, Markus Armbruster
5 *
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.
10 *
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.
15 *
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/>.
18 *
19 * ---
20 *
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.
24 *
25 * ---
26 *
27 * res_pop.c: Get maximum pop of a sector
28 *
29 * Known contributors to this file:
30 * Ken Stevens, 1995
31 * Steve McClure, 1998
32 * Markus Armbruster, 2005-2016
33 */
34
35 #include <config.h>
36
37 #include "item.h"
38 #include "misc.h"
39 #include "optlist.h"
40 #include "prototypes.h"
41 #include "sect.h"
42 #include "xy.h"
43
44 int
max_population(float research,int desig,int eff)45 max_population(float research, int desig, int eff)
46 {
47 int maxpop = dchr[desig].d_maxpop;
48 int mp100, rmax;
49
50 /* city efficiency limits maximum population */
51 if (IS_BIG_CITY(desig)) {
52 mp100 = MIN(ITEM_MAX, 10 * maxpop);
53 maxpop += (mp100 - maxpop) * eff / 100.0;
54 }
55
56 if (opt_RES_POP) {
57 /* research limits maximum population */
58 rmax = maxpop * 0.4
59 + maxpop * 0.6 * (50.0 + 4.0*research) / (200.0 + 3.0*research);
60 if (maxpop > rmax)
61 maxpop = rmax;
62 }
63
64 if (CANT_HAPPEN(maxpop > ITEM_MAX))
65 maxpop = ITEM_MAX;
66
67 return maxpop;
68 }
69
70 int
max_pop(float research,struct sctstr * sp)71 max_pop(float research, struct sctstr *sp)
72 {
73 return max_population(research, sp->sct_type, sp->sct_effic);
74 }
75
76 int
max_workers(float research,struct sctstr * sp)77 max_workers(float research, struct sctstr *sp)
78 {
79 return max_population(research, sp->sct_type, 0);
80 }
81