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BSD 4_3 release
[unix-history] / usr / src / games / trek / events.c
/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#ifndef lint
static char sccsid[] = "@(#)events.c 5.1 (Berkeley) 5/30/85";
#endif not lint
# include "trek.h"
/*
** CAUSE TIME TO ELAPSE
**
** This routine does a hell of a lot. It elapses time, eats up
** energy, regenerates energy, processes any events that occur,
** and so on.
*/
events(warp)
int warp; /* set if called in a time warp */
{
register int i;
int j;
struct kling *k;
double rtime;
double xdate;
double idate;
struct event *ev, *xsched(), *schedule();
int ix, iy;
register struct quad *q;
register struct event *e;
int evnum;
int restcancel;
/* if nothing happened, just allow for any Klingons killed */
if (Move.time <= 0.0)
{
Now.time = Now.resource / Now.klings;
return (0);
}
/* indicate that the cloaking device is now working */
Ship.cloakgood = 1;
/* idate is the initial date */
idate = Now.date;
/* schedule attacks if resting too long */
if (Move.time > 0.5 && Move.resting)
schedule(E_ATTACK, 0.5, 0, 0, 0);
/* scan the event list */
while (1)
{
restcancel = 0;
evnum = -1;
/* xdate is the date of the current event */
xdate = idate + Move.time;
/* find the first event that has happened */
for (i = 0; i < MAXEVENTS; i++)
{
e = &Event[i];
if (e->evcode == 0 || (e->evcode & E_GHOST))
continue;
if (e->date < xdate)
{
xdate = e->date;
ev = e;
evnum = i;
}
}
e = ev;
/* find the time between events */
rtime = xdate - Now.date;
/* decrement the magic "Federation Resources" pseudo-variable */
Now.resource -= Now.klings * rtime;
/* and recompute the time left */
Now.time = Now.resource / Now.klings;
/* move us up to the next date */
Now.date = xdate;
/* check for out of time */
if (Now.time <= 0.0)
lose(L_NOTIME);
# ifdef xTRACE
if (evnum >= 0 && Trace)
printf("xdate = %.2f, evcode %d params %d %d %d\n",
xdate, e->evcode, e->x, e->y, e->systemname);
# endif
/* if evnum < 0, no events occurred */
if (evnum < 0)
break;
/* otherwise one did. Find out what it is */
switch (e->evcode & E_EVENT)
{
case E_SNOVA: /* supernova */
/* cause the supernova to happen */
snova(-1);
/* and schedule the next one */
xresched(e, E_SNOVA, 1);
break;
case E_LRTB: /* long range tractor beam */
/* schedule the next one */
xresched(e, E_LRTB, Now.klings);
/* LRTB cannot occur if we are docked */
if (Ship.cond != DOCKED)
{
/* pick a new quadrant */
i = ranf(Now.klings) + 1;
for (ix = 0; ix < NQUADS; ix++)
{
for (iy = 0; iy < NQUADS; iy++)
{
q = &Quad[ix][iy];
if (q->stars >= 0)
if ((i -= q->klings) <= 0)
break;
}
if (i <= 0)
break;
}
/* test for LRTB to same quadrant */
if (Ship.quadx == ix && Ship.quady == iy)
break;
/* nope, dump him in the new quadrant */
Ship.quadx = ix;
Ship.quady = iy;
printf("\n%s caught in long range tractor beam\n", Ship.shipname);
printf("*** Pulled to quadrant %d,%d\n", Ship.quadx, Ship.quady);
Ship.sectx = ranf(NSECTS);
Ship.secty = ranf(NSECTS);
initquad(0);
/* truncate the move time */
Move.time = xdate - idate;
}
break;
case E_KATSB: /* Klingon attacks starbase */
/* if out of bases, forget it */
if (Now.bases <= 0)
{
unschedule(e);
break;
}
/* check for starbase and Klingons in same quadrant */
for (i = 0; i < Now.bases; i++)
{
ix = Now.base[i].x;
iy = Now.base[i].y;
/* see if a Klingon exists in this quadrant */
q = &Quad[ix][iy];
if (q->klings <= 0)
continue;
/* see if already distressed */
for (j = 0; j < MAXEVENTS; j++)
{
e = &Event[j];
if ((e->evcode & E_EVENT) != E_KDESB)
continue;
if (e->x == ix && e->y == iy)
break;
}
if (j < MAXEVENTS)
continue;
/* got a potential attack */
break;
}
e = ev;
if (i >= Now.bases)
{
/* not now; wait a while and see if some Klingons move in */
reschedule(e, 0.5 + 3.0 * franf());
break;
}
/* schedule a new attack, and a destruction of the base */
xresched(e, E_KATSB, 1);
e = xsched(E_KDESB, 1, ix, iy, 0);
/* report it if we can */
if (!damaged(SSRADIO))
{
printf("\nUhura: Captain, we have recieved a distress signal\n");
printf(" from the starbase in quadrant %d,%d.\n",
ix, iy);
restcancel++;
}
else
/* SSRADIO out, make it so we can't see the distress call */
/* but it's still there!!! */
e->evcode |= E_HIDDEN;
break;
case E_KDESB: /* Klingon destroys starbase */
unschedule(e);
q = &Quad[e->x][e->y];
/* if the base has mysteriously gone away, or if the Klingon
got tired and went home, ignore this event */
if (q->bases <=0 || q->klings <= 0)
break;
/* are we in the same quadrant? */
if (e->x == Ship.quadx && e->y == Ship.quady)
{
/* yep, kill one in this quadrant */
printf("\nSpock: ");
killb(Ship.quadx, Ship.quady);
}
else
/* kill one in some other quadrant */
killb(e->x, e->y);
break;
case E_ISSUE: /* issue a distress call */
xresched(e, E_ISSUE, 1);
/* if we already have too many, throw this one away */
if (Ship.distressed >= MAXDISTR)
break;
/* try a whole bunch of times to find something suitable */
for (i = 0; i < 100; i++)
{
ix = ranf(NQUADS);
iy = ranf(NQUADS);
q = &Quad[ix][iy];
/* need a quadrant which is not the current one,
which has some stars which are inhabited and
not already under attack, which is not
supernova'ed, and which has some Klingons in it */
if (!((ix == Ship.quadx && iy == Ship.quady) || q->stars < 0 ||
(q->qsystemname & Q_DISTRESSED) ||
(q->qsystemname & Q_SYSTEM) == 0 || q->klings <= 0))
break;
}
if (i >= 100)
/* can't seem to find one; ignore this call */
break;
/* got one!! Schedule its enslavement */
Ship.distressed++;
e = xsched(E_ENSLV, 1, ix, iy, q->qsystemname);
q->qsystemname = (e - Event) | Q_DISTRESSED;
/* tell the captain about it if we can */
if (!damaged(SSRADIO))
{
printf("\nUhura: Captain, starsystem %s in quadrant %d,%d is under attack\n",
Systemname[e->systemname], ix, iy);
restcancel++;
}
else
/* if we can't tell him, make it invisible */
e->evcode |= E_HIDDEN;
break;
case E_ENSLV: /* starsystem is enslaved */
unschedule(e);
/* see if current distress call still active */
q = &Quad[e->x][e->y];
if (q->klings <= 0)
{
/* no Klingons, clean up */
/* restore the system name */
q->qsystemname = e->systemname;
break;
}
/* play stork and schedule the first baby */
e = schedule(E_REPRO, Param.eventdly[E_REPRO] * franf(), e->x, e->y, e->systemname);
/* report the disaster if we can */
if (!damaged(SSRADIO))
{
printf("\nUhura: We've lost contact with starsystem %s\n",
Systemname[e->systemname]);
printf(" in quadrant %d,%d.\n",
e->x, e->y);
}
else
e->evcode |= E_HIDDEN;
break;
case E_REPRO: /* Klingon reproduces */
/* see if distress call is still active */
q = &Quad[e->x][e->y];
if (q->klings <= 0)
{
unschedule(e);
q->qsystemname = e->systemname;
break;
}
xresched(e, E_REPRO, 1);
/* reproduce one Klingon */
ix = e->x;
iy = e->y;
if (Now.klings == 127)
break; /* full right now */
if (q->klings >= MAXKLQUAD)
{
/* this quadrant not ok, pick an adjacent one */
for (i = ix - 1; i <= ix + 1; i++)
{
if (i < 0 || i >= NQUADS)
continue;
for (j = iy - 1; j <= iy + 1; j++)
{
if (j < 0 || j >= NQUADS)
continue;
q = &Quad[i][j];
/* check for this quad ok (not full & no snova) */
if (q->klings >= MAXKLQUAD || q->stars < 0)
continue;
break;
}
if (j <= iy + 1)
break;
}
if (j > iy + 1)
/* cannot create another yet */
break;
ix = i;
iy = j;
}
/* deliver the child */
q->klings++;
Now.klings++;
if (ix == Ship.quadx && iy == Ship.quady)
{
/* we must position Klingon */
sector(&ix, &iy);
Sect[ix][iy] = KLINGON;
k = &Etc.klingon[Etc.nkling++];
k->x = ix;
k->y = iy;
k->power = Param.klingpwr;
k->srndreq = 0;
compkldist(Etc.klingon[0].dist == Etc.klingon[0].avgdist ? 0 : 1);
}
/* recompute time left */
Now.time = Now.resource / Now.klings;
break;
case E_SNAP: /* take a snapshot of the galaxy */
xresched(e, E_SNAP, 1);
i = (int) Etc.snapshot;
i = bmove(Quad, i, sizeof (Quad));
i = bmove(Event, i, sizeof (Event));
i = bmove(&Now, i, sizeof (Now));
Game.snap = 1;
break;
case E_ATTACK: /* Klingons attack during rest period */
if (!Move.resting)
{
unschedule(e);
break;
}
attack(1);
reschedule(e, 0.5);
break;
case E_FIXDV:
i = e->systemname;
unschedule(e);
/* de-damage the device */
printf("%s reports repair work on the %s finished.\n",
Device[i].person, Device[i].name);
/* handle special processing upon fix */
switch (i)
{
case LIFESUP:
Ship.reserves = Param.reserves;
break;
case SINS:
if (Ship.cond == DOCKED)
break;
printf("Spock has tried to recalibrate your Space Internal Navigation System,\n");
printf(" but he has no standard base to calibrate to. Suggest you get\n");
printf(" to a starbase immediately so that you can properly recalibrate.\n");
Ship.sinsbad = 1;
break;
case SSRADIO:
restcancel = dumpssradio();
break;
}
break;
default:
break;
}
if (restcancel && Move.resting && getynpar("Spock: Shall we cancel our rest period"))
Move.time = xdate - idate;
}
/* unschedule an attack during a rest period */
if (e = Now.eventptr[E_ATTACK])
unschedule(e);
if (!warp)
{
/* eat up energy if cloaked */
if (Ship.cloaked)
Ship.energy -= Param.cloakenergy * Move.time;
/* regenerate resources */
rtime = 1.0 - exp(-Param.regenfac * Move.time);
Ship.shield += (Param.shield - Ship.shield) * rtime;
Ship.energy += (Param.energy - Ship.energy) * rtime;
/* decrement life support reserves */
if (damaged(LIFESUP) && Ship.cond != DOCKED)
Ship.reserves -= Move.time;
}
return (0);
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.