2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2018, 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 * material.c: Tries to find materials for production
29 * Known contributors to this file:
30 * Ville Virrankoski, 1996
31 * Markus Armbruster, 2007-2016
41 * Get build materials from sector @sp.
42 * Array @mvec[ITEM_MAX+1] defines the materials needed to build 100%.
43 * @pct is the percentage to build.
44 * Adjust build percentage downwards so that available materials
45 * suffice. Remove the materials.
46 * Return adjusted build percentage.
49 get_materials(struct sctstr *sp, short mvec[], int pct)
53 for (i = I_NONE + 1; i <= I_MAX; i++) {
56 amt = sp->sct_item[i];
57 if (amt * 100 < mvec[i] * pct)
58 pct = amt * 100 / mvec[i];
61 for (i = I_NONE + 1; i <= I_MAX; i++) {
64 amt = sp->sct_item[i];
65 amt -= roundavg(mvec[i] * pct / 100.0);
66 if (CANT_HAPPEN(amt < 0))
68 sp->sct_item[i] = amt;