2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2016, 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 * produce.c: Produce goodies
29 * Known contributors to this file:
30 * Markus Armbruster, 2004-2016
41 static void materials_charge(struct pchrstr *, short *, int);
43 static char *levelnames[] = {
44 "Technology", "Research", "Education", "Happiness"
48 produce(struct natstr *np, struct sctstr *sp,
49 int desig, int neweff, int *cost)
51 struct pchrstr *product;
54 unsigned char *resource;
57 int unit_work, work_used;
60 int material_limit, res_limit;
64 if (dchr[desig].d_prd < 0)
66 product = &pchr[dchr[desig].d_prd];
67 item = product->p_type;
69 resource = (unsigned char *)sp + product->p_nrndx;
74 material_limit = prod_materials_cost(product, sp->sct_item,
76 if (material_limit <= 0)
83 p_e *= *resource / 100.0;
88 worker_limit = sp->sct_avail * p_e / unit_work;
89 res_limit = prod_resource_limit(product, resource);
91 material_consume = res_limit;
92 if (material_consume > worker_limit)
93 material_consume = (int)worker_limit;
94 if (material_consume > material_limit)
95 material_consume = material_limit;
96 if (material_consume == 0)
99 prodeff = prod_eff(desig, np->nat_level[product->p_nlndx]);
100 if (prodeff <= 0.0 && !player->simulation) {
102 "%s level too low to produce in %s (need %d)\n",
103 levelnames[product->p_nlndx], ownxy(sp), product->p_nlmin);
107 * Adjust produced amount by commodity production ratio
109 output = material_consume * prodeff;
110 if (item == I_NONE) {
111 actual = ldround(output, 1);
112 if (!player->simulation) {
113 levels[sp->sct_own][product->p_level] += output;
114 wu(0, sp->sct_own, "%s (%.2f) produced in %s\n",
115 product->p_name, output, ownxy(sp));
118 actual = roundavg(output);
123 material_consume = roundavg(actual / prodeff);
125 if (sp->sct_item[item] + actual > ITEM_MAX) {
126 actual = ITEM_MAX - sp->sct_item[item];
127 material_consume = roundavg(actual / prodeff);
128 if (material_consume < 0)
129 material_consume = 0;
130 if (sp->sct_own && !player->simulation)
132 "%s production backlog in %s\n",
133 product->p_name, ownxy(sp));
135 sp->sct_item[item] += actual;
138 * Reset produced amount by commodity production ratio
140 materials_charge(product, sp->sct_item, material_consume);
141 if (resource && product->p_nrdep != 0) {
143 * lower natural resource in sector depending on
146 val = *resource - roundavg(product->p_nrdep *
147 material_consume / 100.0);
152 *cost = product->p_cost * material_consume;
155 if (product->p_level == NAT_TLEV) {
156 if (tpops[sp->sct_own] > 50000)
157 *cost *= tpops[sp->sct_own] / 50000.0;
161 if (CANT_HAPPEN(p_e <= 0.0))
163 work_used = roundavg(unit_work * material_consume / p_e);
164 if (CANT_HAPPEN(work_used > sp->sct_avail))
165 work_used = sp->sct_avail;
166 sp->sct_avail -= work_used;
171 * Return how much of product @pp can be made from materials @vec[].
172 * Store amount of work per unit in *@costp.
175 prod_materials_cost(struct pchrstr *pp, short vec[], int *costp)
183 for (i = 0; i < MAXPRCON; ++i) {
186 if (CANT_HAPPEN(pp->p_ctype[i] <= I_NONE || I_MAX < pp->p_ctype[i]))
188 n = vec[pp->p_ctype[i]] / pp->p_camt[i];
191 cost += pp->p_camt[i];
198 materials_charge(struct pchrstr *pp, short *vec, int count)
203 for (i = 0; i < MAXPRCON; ++i) {
204 item = pp->p_ctype[i];
207 if (CANT_HAPPEN(item <= I_NONE || I_MAX < item))
209 n = vec[item] - pp->p_camt[i] * count;
210 if (CANT_HAPPEN(n < 0))
217 * Return how much of product @pp can be made from its resource.
218 * If @pp depletes a resource, @resource must point to its value.
221 prod_resource_limit(struct pchrstr *pp, unsigned char *resource)
223 if (CANT_HAPPEN(pp->p_nrndx && !resource))
225 if (resource && pp->p_nrdep != 0)
226 return *resource * 100 / pp->p_nrdep;
231 * Return p.e. for sector type @type.
232 * Zero means level is too low for production.
233 * @level is the level affecting production.
236 prod_eff(int type, float level)
239 struct dchrstr *dp = &dchr[type];
240 struct pchrstr *pp = &pchr[dp->d_prd];
242 if (CANT_HAPPEN(dp->d_prd < 0))
248 double delta = (double)level - (double)pp->p_nlmin;
252 if (CANT_HAPPEN(delta + pp->p_nllag <= 0))
254 level_p_e = delta / (delta + pp->p_nllag);
257 return level_p_e * dp->d_peffic * 0.01;