games/trek/snova.c

   1 /*      $NetBSD: snova.c,v 1.8 2009/05/24 21:55:24 dholland Exp $       */
   2
   3 /*
   4  * Copyright (c) 1980, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 #if 0
  35 static char sccsid[] = "@(#)snova.c     8.1 (Berkeley) 5/31/93";
  36 #else
  37 __RCSID("$NetBSD: snova.c,v 1.8 2009/05/24 21:55:24 dholland Exp $");
  38 #endif
  39 #endif /* not lint */
  40
  41 #include <stdio.h>
  42 #include <unistd.h>
  43 #include "trek.h"
  44
  45 /*
  46 **  CAUSE SUPERNOVA TO OCCUR
  47 **
  48 **      A supernova occurs.  If 'ix' < 0, a random quadrant is chosen;
  49 **      otherwise, the current quadrant is taken, and (ix, iy) give
  50 **      the sector quadrants of the star which is blowing up.
  51 **
  52 **      If the supernova turns out to be in the quadrant you are in,
  53 **      you go into "emergency override mode", which tries to get you
  54 **      out of the quadrant as fast as possible.  However, if you
  55 **      don't have enough fuel, or if you by chance run into something,
  56 **      or some such thing, you blow up anyway.  Oh yeh, if you are
  57 **      within two sectors of the star, there is nothing that can
  58 **      be done for you.
  59 **
  60 **      When a star has gone supernova, the quadrant becomes uninhab-
  61 **      itable for the rest of eternity, i.e., the game.  If you ever
  62 **      try stopping in such a quadrant, you will go into emergency
  63 **      override mode.
  64 */
  65
  66 void
  67 snova(int x, int y)
  68 {
  69         int             qx, qy;
  70         int             ix, iy = 0;
  71         int             f;
  72         int             dx, dy;
  73         int             n;
  74         struct quad     *q;
  75
  76         f = 0;
  77         ix = x;
  78         if (ix < 0) {
  79                 /* choose a quadrant */
  80                 while (1) {
  81                         qx = ranf(NQUADS);
  82                         qy = ranf(NQUADS);
  83                         q = &Quad[qx][qy];
  84                         if (q->stars > 0)
  85                                 break;
  86                 }
  87                 if (Ship.quadx == qx && Ship.quady == qy) {
  88                         /* select a particular star */
  89                         n = ranf(q->stars);
  90                         for (ix = 0; ix < NSECTS; ix++) {
  91                                 for (iy = 0; iy < NSECTS; iy++)
  92                                         if (Sect[ix][iy] == STAR ||
  93                                             Sect[ix][iy] == INHABIT)
  94                                                 if ((n -= 1) <= 0)
  95                                                         break;
  96                                 if (n <= 0)
  97                                         break;
  98                         }
  99                         f = 1;
 100                 }
 101         } else {
 102                 /* current quadrant */
 103                 iy = y;
 104                 qx = Ship.quadx;
 105                 qy = Ship.quady;
 106                 q = &Quad[qx][qy];
 107                 f = 1;
 108         }
 109         if (f) {
 110                 /* supernova is in same quadrant as Enterprise */
 111                 printf("\a\nRED ALERT: supernova occuring at %d,%d\n", ix, iy);
 112                 dx = ix - Ship.sectx;
 113                 dy = iy - Ship.secty;
 114                 if (dx * dx + dy * dy <= 2) {
 115                         printf("***  Emergency override attem");
 116                         sleep(1);
 117                         printf("\n");
 118                         lose(L_SNOVA);
 119                 }
 120                 q->scanned = 1000;
 121         } else {
 122                 if (!damaged(SSRADIO)) {
 123                         q->scanned = 1000;
 124                         printf("\nUhura: Captain, Starfleet Command reports "
 125                                "a supernova\n");
 126                         printf("  in quadrant %d,%d.  Caution is advised\n",
 127                                 qx, qy);
 128                 }
 129         }
 130
 131         /* clear out the supernova'ed quadrant */
 132         dx = q->klings;
 133         dy = q->stars;
 134         Now.klings -= dx;
 135         if (x >= 0) {
 136                 /* Enterprise caused supernova */
 137                 Game.kills += dy;
 138                 if (q->bases)
 139                         killb(qx, qy);
 140                 Game.killk += dx;
 141         } else {
 142                 if (q->bases)
 143                         killb(qx, qy);
 144         }
 145         killd(qx, qy, (x >= 0));
 146         q->stars = -1;
 147         q->klings = 0;
 148         if (Now.klings <= 0) {
 149                 printf("Lucky devil, that supernova destroyed the last "
 150                        "klingon\n");
 151                 win();
 152         }
 153         return;
 154 }