BSD 4_4 release

[unix-history] / usr / src / games / trek / snova.c

/*
* 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. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Berkeley and its contributors.
* 4. 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.
*/

#ifndef lint
static char sccsid[] = "@(#)snova.c     8.1 (Berkeley) 5/31/93";
#endif /* not lint */

# include       "trek.h"

/*
**  CAUSE SUPERNOVA TO OCCUR
**
**      A supernova occurs.  If 'ix' < 0, a random quadrant is chosen;
**      otherwise, the current quadrant is taken, and (ix, iy) give
**      the sector quadrants of the star which is blowing up.
**
**      If the supernova turns out to be in the quadrant you are in,
**      you go into "emergency override mode", which tries to get you
**      out of the quadrant as fast as possible.  However, if you
**      don't have enough fuel, or if you by chance run into something,
**      or some such thing, you blow up anyway.  Oh yeh, if you are
**      within two sectors of the star, there is nothing that can
**      be done for you.
**
**      When a star has gone supernova, the quadrant becomes uninhab-
**      itable for the rest of eternity, i.e., the game.  If you ever
**      try stopping in such a quadrant, you will go into emergency
**      override mode.
*/

snova(x, y)
int     x, y;
{
       int                     qx, qy;
       register int            ix, iy;
       int                     f;
       int                     dx, dy;
       int                     n;
       register struct quad    *q;

       f = 0;
       ix = x;
       if (ix < 0)
       {
               /* choose a quadrant */
               while (1)
               {
                       qx = ranf(NQUADS);
                       qy = ranf(NQUADS);
                       q = &Quad[qx][qy];
                       if (q->stars > 0)
                               break;
               }
               if (Ship.quadx == qx && Ship.quady == qy)
               {
                       /* select a particular star */
                       n = ranf(q->stars);
                       for (ix = 0; ix < NSECTS; ix++)
                       {
                               for (iy = 0; iy < NSECTS; iy++)
                                       if (Sect[ix][iy] == STAR || Sect[ix][iy] == INHABIT)
                                               if ((n -= 1) <= 0)
                                                       break;
                               if (n <= 0)
                                       break;
                       }
                       f = 1;
               }
       }
       else
       {
               /* current quadrant */
               iy = y;
               qx = Ship.quadx;
               qy = Ship.quady;
               q = &Quad[qx][qy];
               f = 1;
       }
       if (f)
       {
               /* supernova is in same quadrant as Enterprise */
               printf("\a\nRED ALERT: supernova occuring at %d,%d\n", ix, iy);
               dx = ix - Ship.sectx;
               dy = iy - Ship.secty;
               if (dx * dx + dy * dy <= 2)
               {
                       printf("***  Emergency override attem");
                       sleep(1);
                       printf("\n");
                       lose(L_SNOVA);
               }
               q->scanned = 1000;
       }
       else
       {
               if (!damaged(SSRADIO))
               {
                       q->scanned = 1000;
                       printf("\nUhura: Captain, Starfleet Command reports a supernova\n");
                       printf("  in quadrant %d,%d.  Caution is advised\n", qx, qy);
               }
       }

       /* clear out the supernova'ed quadrant */
       dx = q->klings;
       dy = q->stars;
       Now.klings -= dx;
       if (x >= 0)
       {
               /* Enterprise caused supernova */
               Game.kills += dy;
               if (q->bases)
                       killb(qx, qy, -1);
               Game.killk += dx;
       }
       else
               if (q->bases)
                       killb(qx, qy, 0);
       killd(qx, qy, (x >= 0));
       q->stars = -1;
       q->klings = 0;
       if (Now.klings <= 0)
       {
               printf("Lucky devil, that supernova destroyed the last klingon\n");
               win();
       }
       return;
}