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/* $NetBSD: help.c,v 1.13 2009/08/12 08:54:54 dholland Exp $ */
/*
* Copyright (c) 1980, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)help.c 8.1 (Berkeley) 5/31/93";
#else
__RCSID("$NetBSD: help.c,v 1.13 2009/08/12 08:54:54 dholland Exp $");
#endif
#endif /* not lint */
#include <stdio.h>
#include <math.h>
#include <unistd.h>
#include <limits.h>
#include "trek.h"
/*
** call starbase for help
**
** First, the closest starbase is selected. If there is a
** a starbase in your own quadrant, you are in good shape.
** This distance takes quadrant distances into account only.
**
** A magic number is computed based on the distance which acts
** as the probability that you will be rematerialized. You
** get three tries.
**
** When it is determined that you should be able to be remater-
** ialized (i.e., when the probability thing mentioned above
** comes up positive), you are put into that quadrant (anywhere).
** Then, we try to see if there is a spot adjacent to the star-
** base. If not, you can't be rematerialized!!! Otherwise,
** it drops you there. It only tries five times to find a spot
** to drop you. After that, it's your problem.
*/
static const char *const Cntvect[3] = {
"first", "second", "third"
};
/*ARGSUSED*/
void
help(int v __unused)
{
int i;
double dist, x;
int dx = 0, dy = 0;
int j, l = 0;
/* check to see if calling for help is reasonable ... */
if (Ship.cond == DOCKED) {
printf("Uhura: But Captain, we're already docked\n");
return;
}
/* or possible */
if (damaged(SSRADIO)) {
out(SSRADIO);
return;
}
if (Now.bases <= 0) {
printf("Uhura: I'm not getting any response from starbase\n");
return;
}
/* tut tut, there goes the score */
Game.helps += 1;
/* find the closest base */
dist = TOOLARGE;
if (Quad[Ship.quadx][Ship.quady].bases <= 0) {
/* there isn't one in this quadrant */
for (i = 0; i < Now.bases; i++) {
/* compute distance */
dx = Now.base[i].x - Ship.quadx;
dy = Now.base[i].y - Ship.quady;
x = dx * dx + dy * dy;
x = sqrt(x);
/* see if better than what we already have */
if (x < dist) {
dist = x;
l = i;
}
}
/* go to that quadrant */
Ship.quadx = Now.base[l].x;
Ship.quady = Now.base[l].y;
initquad(1);
} else {
dist = 0.0;
}
/* dematerialize the Enterprise */
Sect[Ship.sectx][Ship.secty] = EMPTY;
printf("Starbase in %d,%d responds\n", Ship.quadx, Ship.quady);
/* this next thing acts as a probability that it will work */
x = pow(1.0 - pow(0.94, dist), 0.3333333);
/* attempt to rematerialize */
for (i = 0; i < 3; i++) {
sleep(2);
printf("%s attempt to rematerialize ", Cntvect[i]);
if (franf() > x) {
/* ok, that's good. let's see if we can set her down */
for (j = 0; j < 5; j++) {
dx = Etc.starbase.x + ranf(3) - 1;
if (dx < 0 || dx >= NSECTS)
continue;
dy = Etc.starbase.y + ranf(3) - 1;
if (dy < 0 || dy >= NSECTS ||
Sect[dx][dy] != EMPTY)
continue;
break;
}
if (j < 5) {
/* found an empty spot */
printf("succeeds\n");
Ship.sectx = dx;
Ship.secty = dy;
Sect[dx][dy] = Ship.ship;
dock(0);
compkldist(0);
return;
}
/* the starbase must have been surrounded */
}
printf("fails\n");
}
/* one, two, three strikes, you're out */
lose(L_NOHELP);
}
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