# 2.11BSD/src/games/trek/help.c

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```/*
* Copyright (c) 1980 Regents of the University of California.
* specifies the terms and conditions for redistribution.
*/

#ifndef lint
static char sccsid[] = "@(#)help.c	5.1 (Berkeley) 5/30/85";
#endif not lint

# 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.
*/

char	*Cntvect[3] =
{"first", "second", "third"};

help()
{
register int		i;
double			dist, x;
register int		dx, dy;
int			j, l;

/* check to see if calling for help is reasonable ... */
if (Ship.cond == DOCKED)
return (printf("Uhura: But Captain, we're already docked\n"));

/* or possible */
if (Now.bases <= 0)
return (printf("Uhura: I'm not getting any response from starbase\n"));

/* tut tut, there goes the score */
Game.helps += 1;

/* find the closest base */
dist = 1e50;
{
/* there isn't one in this quadrant */
for (i = 0; i < Now.bases; i++)
{
/* compute distance */
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 */
}
else
{
dist = 0.0;
}

/* dematerialize the Enterprise */
Sect[Ship.sectx][Ship.secty] = EMPTY;

/* 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();
compkldist(0);
return;
}
/* the starbase must have been surrounded */
}
printf("fails\n");
}

/* one, two, three strikes, you're out */
lose(L_NOHELP);
}
```