games/trek/snova.c

   1 /*-
   2  * Copyright (c) 1980, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#)snova.c  8.1 (Berkeley) 5/31/93
  30  * $FreeBSD: src/games/trek/snova.c,v 1.4 1999/11/30 03:49:54 billf Exp $
  31  * $DragonFly: src/games/trek/snova.c,v 1.4 2007/05/13 22:25:41 swildner Exp $
  32  */
  33
  34 #include "trek.h"
  35
  36 /*
  37 **  CAUSE SUPERNOVA TO OCCUR
  38 **
  39 **      A supernova occurs.  If 'ix' < 0, a random quadrant is chosen;
  40 **      otherwise, the current quadrant is taken, and (ix, iy) give
  41 **      the sector quadrants of the star which is blowing up.
  42 **
  43 **      If the supernova turns out to be in the quadrant you are in,
  44 **      you go into "emergency override mode", which tries to get you
  45 **      out of the quadrant as fast as possible.  However, if you
  46 **      don't have enough fuel, or if you by chance run into something,
  47 **      or some such thing, you blow up anyway.  Oh yeh, if you are
  48 **      within two sectors of the star, there is nothing that can
  49 **      be done for you.
  50 **
  51 **      When a star has gone supernova, the quadrant becomes uninhab-
  52 **      itable for the rest of eternity, i.e., the game.  If you ever
  53 **      try stopping in such a quadrant, you will go into emergency
  54 **      override mode.
  55 */
  56
  57 void
  58 snova(int x, int y)
  59 {
  60         int             qx, qy;
  61         int             ix, iy = 0;
  62         int             f;
  63         int             dx, dy;
  64         int             n;
  65         struct quad     *q;
  66
  67         f = 0;
  68         ix = x;
  69         if (ix < 0) {
  70                 /* choose a quadrant */
  71                 while (1) {
  72                         qx = ranf(NQUADS);
  73                         qy = ranf(NQUADS);
  74                         q = &Quad[qx][qy];
  75                         if (q->stars > 0)
  76                                 break;
  77                 }
  78                 if (Ship.quadx == qx && Ship.quady == qy) {
  79                         /* select a particular star */
  80                         n = ranf(q->stars);
  81                         for (ix = 0; ix < NSECTS; ix++) {
  82                                 for (iy = 0; iy < NSECTS; iy++)
  83                                         if (Sect[ix][iy] == STAR ||
  84                                             Sect[ix][iy] == INHABIT)
  85                                                 if ((n -= 1) <= 0)
  86                                                         break;
  87                                 if (n <= 0)
  88                                         break;
  89                         }
  90                         f = 1;
  91                 }
  92         } else {
  93                 /* current quadrant */
  94                 iy = y;
  95                 qx = Ship.quadx;
  96                 qy = Ship.quady;
  97                 q = &Quad[qx][qy];
  98                 f = 1;
  99         }
 100         if (f) {
 101                 /* supernova is in same quadrant as Enterprise */
 102                 printf("\a\nRED ALERT: supernova occurring at %d,%d\n", ix, iy);
 103                 dx = ix - Ship.sectx;
 104                 dy = iy - Ship.secty;
 105                 if (dx * dx + dy * dy <= 2) {
 106                         printf("***  Emergency override attem");
 107                         sleep(1);
 108                         printf("\n");
 109                         lose(L_SNOVA);
 110                 }
 111                 q->scanned = 1000;
 112         } else {
 113                 if (!damaged(SSRADIO)) {
 114                         q->scanned = 1000;
 115                         printf("\nUhura: Captain, Starfleet Command reports a supernova\n");
 116                         printf("  in quadrant %d,%d.  Caution is advised\n", qx, qy);
 117                 }
 118         }
 119
 120         /* clear out the supernova'ed quadrant */
 121         dx = q->klings;
 122         dy = q->stars;
 123         Now.klings -= dx;
 124         if (x >= 0) {
 125                 /* Enterprise caused supernova */
 126                 Game.kills += dy;
 127                 if (q->bases)
 128                         killb(qx, qy);
 129                 Game.killk += dx;
 130         } else {
 131                 if (q->bases)
 132                         killb(qx, qy);
 133         }
 134         killd(qx, qy, (x >= 0));
 135         q->stars = -1;
 136         q->klings = 0;
 137         if (Now.klings <= 0) {
 138                 printf("Lucky devil, that supernova destroyed the last klingon\n");
 139                 win();
 140         }
 141         return;
 142 }