games/trek/snova.c

   1 /*      @(#)snova.c     8.1 (Berkeley) 5/31/93                          */
   2 /*      $NetBSD: snova.c,v 1.10 2018/02/08 09:05:16 dholland Exp $      */
   3
   4 /*
   5  * Copyright (c) 1980, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #include <stdio.h>
  34 #include <unistd.h>
  35 #include "trek.h"
  36
  37 /*
  38 **  CAUSE SUPERNOVA TO OCCUR
  39 **
  40 **      A supernova occurs.  If 'ix' < 0, a random quadrant is chosen;
  41 **      otherwise, the current quadrant is taken, and (ix, iy) give
  42 **      the sector quadrants of the star which is blowing up.
  43 **
  44 **      If the supernova turns out to be in the quadrant you are in,
  45 **      you go into "emergency override mode", which tries to get you
  46 **      out of the quadrant as fast as possible.  However, if you
  47 **      don't have enough fuel, or if you by chance run into something,
  48 **      or some such thing, you blow up anyway.  Oh yeh, if you are
  49 **      within two sectors of the star, there is nothing that can
  50 **      be done for you.
  51 **
  52 **      When a star has gone supernova, the quadrant becomes uninhab-
  53 **      itable for the rest of eternity, i.e., the game.  If you ever
  54 **      try stopping in such a quadrant, you will go into emergency
  55 **      override mode.
  56 */
  57
  58 void
  59 snova(int x, int y)
  60 {
  61         int             qx, qy;
  62         int             ix, iy = 0;
  63         int             f;
  64         int             dx, dy;
  65         int             n;
  66         struct quad     *q;
  67
  68         f = 0;
  69         ix = x;
  70         if (ix < 0) {
  71                 /* choose a quadrant */
  72                 while (1) {
  73                         qx = ranf(NQUADS);
  74                         qy = ranf(NQUADS);
  75                         q = &Quad[qx][qy];
  76                         if (q->stars > 0)
  77                                 break;
  78                 }
  79                 if (Ship.quadx == qx && Ship.quady == qy) {
  80                         /* select a particular star */
  81                         n = ranf(q->stars);
  82                         for (ix = 0; ix < NSECTS; ix++) {
  83                                 for (iy = 0; iy < NSECTS; iy++)
  84                                         if (Sect[ix][iy] == STAR ||
  85                                             Sect[ix][iy] == INHABIT)
  86                                                 if ((n -= 1) <= 0)
  87                                                         break;
  88                                 if (n <= 0)
  89                                         break;
  90                         }
  91                         f = 1;
  92                 }
  93         } else {
  94                 /* current quadrant */
  95                 iy = y;
  96                 qx = Ship.quadx;
  97                 qy = Ship.quady;
  98                 q = &Quad[qx][qy];
  99                 f = 1;
 100         }
 101         if (f) {
 102                 /* supernova is in same quadrant as Enterprise */
 103                 printf("\a\nRED ALERT: supernova occurring at %d,%d\n", ix, iy);
 104                 dx = ix - Ship.sectx;
 105                 dy = iy - Ship.secty;
 106                 if (dx * dx + dy * dy <= 2) {
 107                         printf("***  Emergency override attem");
 108                         sleep(1);
 109                         printf("\n");
 110                         lose(L_SNOVA);
 111                 }
 112                 q->scanned = 1000;
 113         } else {
 114                 if (!damaged(SSRADIO)) {
 115                         q->scanned = 1000;
 116                         printf("\nUhura: Captain, Starfleet Command reports "
 117                                "a supernova\n");
 118                         printf("  in quadrant %d,%d.  Caution is advised\n",
 119                                 qx, qy);
 120                 }
 121         }
 122
 123         /* clear out the supernova'ed quadrant */
 124         dx = q->klings;
 125         dy = q->stars;
 126         Now.klings -= dx;
 127         if (x >= 0) {
 128                 /* Enterprise caused supernova */
 129                 Game.kills += dy;
 130                 if (q->bases)
 131                         killb(qx, qy);
 132                 Game.killk += dx;
 133         } else {
 134                 if (q->bases)
 135                         killb(qx, qy);
 136         }
 137         killd(qx, qy, (x >= 0));
 138         q->stars = -1;
 139         q->klings = 0;
 140         if (Now.klings <= 0) {
 141                 printf("Lucky devil, that supernova destroyed the last "
 142                        "klingon\n");
 143                 win();
 144         }
 145         return;
 146 }