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. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#)snova.c  8.1 (Berkeley) 5/31/93
  34  * $FreeBSD: src/games/trek/snova.c,v 1.4 1999/11/30 03:49:54 billf Exp $
  35  * $DragonFly: src/games/trek/snova.c,v 1.4 2007/05/13 22:25:41 swildner Exp $
  36  */
  37
  38 # include       "trek.h"
  39
  40 /*
  41 **  CAUSE SUPERNOVA TO OCCUR
  42 **
  43 **      A supernova occurs.  If 'ix' < 0, a random quadrant is chosen;
  44 **      otherwise, the current quadrant is taken, and (ix, iy) give
  45 **      the sector quadrants of the star which is blowing up.
  46 **
  47 **      If the supernova turns out to be in the quadrant you are in,
  48 **      you go into "emergency override mode", which tries to get you
  49 **      out of the quadrant as fast as possible.  However, if you
  50 **      don't have enough fuel, or if you by chance run into something,
  51 **      or some such thing, you blow up anyway.  Oh yeh, if you are
  52 **      within two sectors of the star, there is nothing that can
  53 **      be done for you.
  54 **
  55 **      When a star has gone supernova, the quadrant becomes uninhab-
  56 **      itable for the rest of eternity, i.e., the game.  If you ever
  57 **      try stopping in such a quadrant, you will go into emergency
  58 **      override mode.
  59 */
  60
  61 void
  62 snova(int x, int y)
  63 {
  64         int                     qx, qy;
  65         int             ix, iy = 0;
  66         int                     f;
  67         int                     dx, dy;
  68         int                     n;
  69         struct quad     *q;
  70
  71         f = 0;
  72         ix = x;
  73         if (ix < 0)
  74         {
  75                 /* choose a quadrant */
  76                 while (1)
  77                 {
  78                         qx = ranf(NQUADS);
  79                         qy = ranf(NQUADS);
  80                         q = &Quad[qx][qy];
  81                         if (q->stars > 0)
  82                                 break;
  83                 }
  84                 if (Ship.quadx == qx && Ship.quady == qy)
  85                 {
  86                         /* select a particular star */
  87                         n = ranf(q->stars);
  88                         for (ix = 0; ix < NSECTS; ix++)
  89                         {
  90                                 for (iy = 0; iy < NSECTS; iy++)
  91                                         if (Sect[ix][iy] == STAR || Sect[ix][iy] == INHABIT)
  92                                                 if ((n -= 1) <= 0)
  93                                                         break;
  94                                 if (n <= 0)
  95                                         break;
  96                         }
  97                         f = 1;
  98                 }
  99         }
 100         else
 101         {
 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         {
 111                 /* supernova is in same quadrant as Enterprise */
 112                 printf("\a\nRED ALERT: supernova occurring at %d,%d\n", ix, iy);
 113                 dx = ix - Ship.sectx;
 114                 dy = iy - Ship.secty;
 115                 if (dx * dx + dy * dy <= 2)
 116                 {
 117                         printf("***  Emergency override attem");
 118                         sleep(1);
 119                         printf("\n");
 120                         lose(L_SNOVA);
 121                 }
 122                 q->scanned = 1000;
 123         }
 124         else
 125         {
 126                 if (!damaged(SSRADIO))
 127                 {
 128                         q->scanned = 1000;
 129                         printf("\nUhura: Captain, Starfleet Command reports a supernova\n");
 130                         printf("  in quadrant %d,%d.  Caution is advised\n", qx, qy);
 131                 }
 132         }
 133
 134         /* clear out the supernova'ed quadrant */
 135         dx = q->klings;
 136         dy = q->stars;
 137         Now.klings -= dx;
 138         if (x >= 0)
 139         {
 140                 /* Enterprise caused supernova */
 141                 Game.kills += dy;
 142                 if (q->bases)
 143                         killb(qx, qy);
 144                 Game.killk += dx;
 145         }
 146         else
 147                 if (q->bases)
 148                         killb(qx, qy);
 149         killd(qx, qy, (x >= 0));
 150         q->stars = -1;
 151         q->klings = 0;
 152         if (Now.klings <= 0)
 153         {
 154                 printf("Lucky devil, that supernova destroyed the last klingon\n");
 155                 win();
 156         }
 157         return;
 158 }