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Import of Empire 4.2.12

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Markus Armbruster 2003-08-23 12:23:04 +00:00
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src/lib/commands/payo.c Normal file
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/*
* Empire - A multi-player, client/server Internet based war game.
* Copyright (C) 1986-2000, Dave Pare, Jeff Bailey, Thomas Ruschak,
* Ken Stevens, Steve McClure
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* ---
*
* See the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
* related information and legal notices. It is expected that any future
* projects/authors will amend these files as needed.
*
* ---
*
* payo.c: Calculate trade ship payoffs
*
* Known contributors to this file:
* Thomas Ruschak, 1992
*/
#include "misc.h"
#include "player.h"
#include "var.h"
#include "xy.h"
#include "sect.h"
#include "ship.h"
#include "nat.h"
#include "nsc.h"
#include "deity.h"
#include "file.h"
#include "commands.h"
#include "optlist.h"
int
payo(void)
{
struct sctstr sect;
int nships;
struct nstr_item ni;
struct shpstr ship;
struct mchrstr *mp;
int dist;
float cash=0.0;
extern int trade_1_dist; /* less than this gets no money */
extern int trade_2_dist; /* less than this gets trade_1 money */
extern int trade_3_dist; /* less than this gets trade_2 money */
extern float trade_1; /* return on trade_1 distance */
extern float trade_2; /* return on trade_2 distance */
extern float trade_3; /* return on trade_3 distance */
extern float trade_ally_bonus; /* 20% bonus for trading with allies */
if (!opt_TRADESHIPS) {
pr("Tradeships are not enabled.\n");
return RET_FAIL;
}
if (!snxtitem(&ni, EF_SHIP, player->argp[1]))
return RET_SYN;
nships = 0;
while (nxtitem(&ni, (s_char *)&ship)) {
if (!player->owner || ship.shp_own == 0)
continue;
if (ship.shp_type < 0 || ship.shp_type > shp_maxno) {
pr("bad ship type %d (#%d)\n",
ship.shp_type, ni.cur);
continue;
}
mp = &mchr[(int)ship.shp_type];
if (!(mp->m_flags & M_TRADE))
continue;
if (nships++ == 0) {
if (player->god)
pr("own ");
pr("shp# ship type orig x,y x,y dist $$\n");
}
if (player->god)
pr("%3d ", ship.shp_own);
pr("%4d ", ni.cur);
pr("%-16.16s ", mchr[(int)ship.shp_type].m_name);
prxy("%4d,%-4d ", ship.shp_orig_x,
ship.shp_orig_y, player->cnum);
prxy("%4d,%-4d ", ship.shp_x, ship.shp_y, player->cnum);
getsect(ship.shp_x,ship.shp_y,&sect);
dist = mapdist(ship.shp_x, ship.shp_y,
ship.shp_orig_x, ship.shp_orig_y);
pr("%4d ", dist);
if (dist < trade_1_dist)
cash = 0;
else if (dist < trade_2_dist)
cash = (1.0 + trade_1*((float)dist));
else if (dist < trade_3_dist)
cash = (1.0 + trade_2*((float)dist));
else
cash = (1.0 + trade_3*((float)dist));
cash *= mp->m_cost;
cash *= (((float)ship.shp_effic) / 100.0);
if (sect.sct_own && (sect.sct_own != ship.shp_own))
cash *= (1.0 + trade_ally_bonus);
pr("$%6.2f\n",cash);
}
if (nships == 0) {
if (player->argp[1])
pr("%s: No ship(s)\n", player->argp[1]);
else
pr("%s: No ship(s)\n", "");
return RET_FAIL;
}else
pr("%d ship%s\n", nships, splur(nships));
return RET_OK;
}