2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2000, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure
6 * This program 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 2 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, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * See the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
23 * related information and legal notices. It is expected that any future
24 * projects/authors will amend these files as needed.
28 * produce.c: Produce goodies
30 * Known contributors to this file:
49 static void materials_charge(struct pchrstr *, short *, int);
50 static int materials_cost(struct pchrstr *, short *, int *);
52 s_char *levelnames[] =
53 { "Technology", "Research", "Education", "Happiness" };
56 produce(struct natstr *np, struct sctstr *sp, short *vec, int work,
57 int desig, int neweff, int *cost, int *amount)
59 register struct pchrstr *product;
74 product = &pchr[dchr[desig].d_prd];
75 if (product == &pchr[0])
77 vtype = product->p_type;
78 item = vtype & ~VT_ITEM;
82 if ((material_limit = materials_cost(product, vec, &unit_work)) <= 0)
85 * calculate production efficiency.
88 if (product->p_nrndx != 0) {
90 resource = ((s_char *)sp) + product->p_nrndx;
91 p_e = (*resource * p_e) / 100.0;
92 if (product->p_nrdep > 0) {
93 /* XXX this looks way wrong */
94 depend = (*resource * 100.0) / product->p_nrdep;
100 * determine number that can be made with
101 * the available workforce
105 material_consume = material_limit;
106 worker_limit = roundavg(work * p_e / unit_work);
107 if (material_consume > worker_limit)
108 material_consume = worker_limit;
109 if (material_consume == 0)
112 if (product->p_nlndx >= 0) {
113 level_p_e = np->nat_level[product->p_nlndx] - product->p_nlmin;
114 if ((level_p_e < 0.0) && (!player->simulation)) {
116 "%s level too low to produce in %s (need %d)\n",
117 levelnames[product->p_nlndx], ownxy(sp), product->p_nlmin);
120 level_p_e = level_p_e / (level_p_e + product->p_nllag);
123 * Adjust produced amount by commodity production ratio
125 output = roundavg(product->p_effic * 0.01 * material_consume);
126 if ((vtype == 0) && (!player->simulation)) {
127 levels[sp->sct_own][product->p_level] += output * level_p_e;
128 wu((natid)0, sp->sct_own, "%s (%.2f) produced in %s\n",
129 product->p_name, output * level_p_e, ownxy(sp));
131 if ((actual = roundavg(level_p_e * output)) <= 0)
133 if (product->p_nrdep != 0) {
134 if (*resource * 100 < product->p_nrdep * actual)
135 actual = *resource * 100 / product->p_nrdep;
138 material_consume = roundavg(999.0 * material_consume / actual);
141 if (vec[item] + actual > ITEM_MAX) {
142 material_consume = roundavg((double)(ITEM_MAX - vec[item])
143 * material_consume / actual);
144 if (material_consume < 0)
145 material_consume = 0;
146 vec[item] = ITEM_MAX;
147 if (sp->sct_own && !player->simulation)
149 "%s production backlog in %s\n",
150 product->p_name, ownxy(sp));
155 * Reset produced amount by commodity production ratio
157 if (!player->simulation) {
158 materials_charge(product, vec, material_consume);
159 if (product->p_nrdep != 0) {
161 * lower natural resource in sector depending on
164 val = *resource - roundavg(product->p_nrdep *
165 material_consume / 100.0);
172 *cost = product->p_cost * material_consume;
175 if (product->p_level == NAT_TLEV) {
176 if (tpops[sp->sct_own] > 50000)
178 (double)*cost * (double)tpops[sp->sct_own] / 50000.0;
182 /* The min() here is to take care of integer rounding errors */
184 return min(work, (int)(unit_work * material_consume / p_e));
190 materials_cost(struct pchrstr *product, short *vec, int *costp)
193 register u_short *ap;
197 register u_char *endp;
201 ap = product->p_vamt;
202 endp = product->p_vtype + product->p_nv;
203 for (vp = product->p_vtype; vp < endp; vp++, ap++) {
206 n = vec[*vp & ~VT_ITEM] / *ap;
216 materials_charge(struct pchrstr *product, short *vec, int count)
219 register u_short *ap;
220 register u_char *endp;
224 ap = product->p_vamt;
225 endp = product->p_vtype + product->p_nv;
226 for (vp = product->p_vtype; vp < endp; vp++, ap++) {
227 item = *vp & ~VT_ITEM;
228 if (item < 0 || item > I_MAX) {
229 logerror("materials_charge: bad item %d", item);
232 if ((n = vec[item] - *ap * count) < 0) {
233 logerror("materials_charge: %d > %d item #%d",