Import of Empire 4.2.12
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src/lib/common/damage.c
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src/lib/common/damage.c
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/*
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* Empire - A multi-player, client/server Internet based war game.
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* Copyright (C) 1986-2000, Dave Pare, Jeff Bailey, Thomas Ruschak,
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* Ken Stevens, Steve McClure
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* ---
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*
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* See the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
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* related information and legal notices. It is expected that any future
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* projects/authors will amend these files as needed.
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*
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* ---
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*
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* damage.c: Damage stuff.
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*
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* Known contributors to this file:
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* Dave Pare, 1989
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* Steve McClure, 1997
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*/
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#include "misc.h"
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#include "var.h"
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#include "sect.h"
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#include "ship.h"
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#include "land.h"
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#include "plane.h"
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#include "nuke.h"
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#include "xy.h"
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#include "nsc.h"
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#include <fcntl.h>
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#include "file.h"
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#include "optlist.h"
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#include "damage.h"
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#include "common.h"
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#include "gen.h"
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#include "subs.h"
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void
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ship_damage(struct shpstr *sp, int dam)
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{
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if (dam <= 0)
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return;
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if (dam > 100)
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dam = 100;
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mpr(sp->shp_own, "\t%s takes %d\n", prship(sp), dam);
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sp->shp_effic = damage((int)sp->shp_effic, dam);
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if (sp->shp_mobil > 0)
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sp->shp_mobil = damage((int)sp->shp_mobil, dam);
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if (opt_FUEL && sp->shp_fuel)
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sp->shp_fuel = damage((int)sp->shp_fuel, dam);
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sp->shp_nv = vl_damage(dam, sp->shp_vtype, sp->shp_vamt,
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(int) sp->shp_nv);
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}
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void
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shipdamage(struct shpstr *sp, int dam)
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{
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ship_damage(sp, (int)( dam/(1.0 + sp->shp_armor / 100.0)));
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}
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void
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land_damage(struct lndstr *lp, int dam)
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{
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if (dam <= 0)
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return;
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if (dam > 100)
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dam = 100;
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mpr(lp->lnd_own, "\t%s takes %d\n", prland(lp), dam);
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if (lchr[(int)lp->lnd_type].l_flags & L_SPY) {
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/* Spies die! */
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lp->lnd_effic = 0;
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} else {
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lp->lnd_effic = damage((int)lp->lnd_effic, dam);
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if (lp->lnd_mobil > 0)
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lp->lnd_mobil = damage((int)lp->lnd_mobil, dam);
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if (opt_FUEL && lp->lnd_fuel)
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lp->lnd_fuel = damage((int)lp->lnd_fuel, dam);
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lp->lnd_nv = vl_damage(dam, lp->lnd_vtype, lp->lnd_vamt,
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(int) lp->lnd_nv);
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}
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}
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void
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landdamage(struct lndstr *lp, int dam)
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{
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double damage_factor, m;
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extern int land_mob_max;
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m = (double)land_mob_max;
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/* fortification reduces damage */
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damage_factor = m / (m+((double)lp->lnd_harden));
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if (damage_factor == 0.0)
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damage_factor = 1.0;
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/* vulnerable units take more damage */
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damage_factor *= lp->lnd_vul / 100.0;
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land_damage(lp, ldround(damage_factor * dam,1));
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}
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void
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planedamage(struct plnstr *pp, int dam)
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{
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if (dam <= 0)
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return;
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if (dam > 100)
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dam = 100;
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mpr(pp->pln_own, "\t%s takes %d\n", prplane(pp), dam);
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pp->pln_effic = damage((int)pp->pln_effic, dam);
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if (pp->pln_mobil > 0)
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pp->pln_mobil = damage((int)pp->pln_mobil, dam);
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}
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/*
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* nukedamage() actually just calculates damage
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* rather than inflicting it.
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*/
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int
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nukedamage(struct nchrstr *ncp, int range, int airburst)
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{
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int dam;
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int rad;
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rad = ncp->n_blast;
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if (airburst)
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rad = (int) (rad * 1.5);
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if (rad < range)
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return 0;
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if (airburst) {
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/* larger area, less center damage */
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dam = (int) ((ncp->n_dam * 0.75) - (range * 20));
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} else {
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/* smaller area, more center damage */
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dam = (int) (ncp->n_dam / (range + 1.0));
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}
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if (dam < 5)
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dam = 0;
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return dam;
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}
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int
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damage(register int amt, int pct)
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{
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register int tmp;
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register int lost;
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if (amt <= 0)
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return 0;
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tmp = amt * pct;
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lost = tmp / 100;
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if ((random() % 100) < (tmp % 100))
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lost++;
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return amt - lost;
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}
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/* asymptotic damage to commodities, efficiency, and sectors */
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int
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effdamage(register int amt, int dam)
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{
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return damage(amt, PERCENT_DAMAGE(dam));
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}
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int
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commdamage(register int amt, int dam, int vtype)
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{
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extern double people_damage;
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int lost;
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if (vtype == V_BAR && opt_SUPER_BARS)
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return amt;
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lost = amt - effdamage(amt, dam);
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if (vtype == V_MILIT ||
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vtype == V_CIVIL ||
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vtype == V_UW)
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lost = ldround(people_damage * lost, 1);
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return amt - lost;
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}
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