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snova.c revision 1.4 
      1 /*	$NetBSD: snova.c,v 1.4 1997/10/12 21:25:18 christos 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. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 #if 0
     39 static char sccsid[] = "@(#)snova.c	8.1 (Berkeley) 5/31/93";
     40 #else
     41 __RCSID("$NetBSD: snova.c,v 1.4 1997/10/12 21:25:18 christos Exp $");
     42 #endif
     43 #endif /* not lint */
     44 
     45 #include <stdio.h>
     46 #include <unistd.h>
     47 #include "trek.h"
     48 
     49 /*
     50 **  CAUSE SUPERNOVA TO OCCUR
     51 **
     52 **	A supernova occurs.  If 'ix' < 0, a random quadrant is chosen;
     53 **	otherwise, the current quadrant is taken, and (ix, iy) give
     54 **	the sector quadrants of the star which is blowing up.
     55 **
     56 **	If the supernova turns out to be in the quadrant you are in,
     57 **	you go into "emergency override mode", which tries to get you
     58 **	out of the quadrant as fast as possible.  However, if you
     59 **	don't have enough fuel, or if you by chance run into something,
     60 **	or some such thing, you blow up anyway.  Oh yeh, if you are
     61 **	within two sectors of the star, there is nothing that can
     62 **	be done for you.
     63 **
     64 **	When a star has gone supernova, the quadrant becomes uninhab-
     65 **	itable for the rest of eternity, i.e., the game.  If you ever
     66 **	try stopping in such a quadrant, you will go into emergency
     67 **	override mode.
     68 */
     69 
     70 void
     71 snova(x, y)
     72 int	x, y;
     73 {
     74 	int		qx, qy;
     75 	int		ix, iy = 0;
     76 	int		f;
     77 	int		dx, dy;
     78 	int		n;
     79 	struct quad	*q;
     80 
     81 	f = 0;
     82 	ix = x;
     83 	if (ix < 0)
     84 	{
     85 		/* choose a quadrant */
     86 		while (1)
     87 		{
     88 			qx = ranf(NQUADS);
     89 			qy = ranf(NQUADS);
     90 			q = &Quad[qx][qy];
     91 			if (q->stars > 0)
     92 				break;
     93 		}
     94 		if (Ship.quadx == qx && Ship.quady == qy)
     95 		{
     96 			/* select a particular star */
     97 			n = ranf(q->stars);
     98 			for (ix = 0; ix < NSECTS; ix++)
     99 			{
    100 				for (iy = 0; iy < NSECTS; iy++)
    101 					if (Sect[ix][iy] == STAR || Sect[ix][iy] == INHABIT)
    102 						if ((n -= 1) <= 0)
    103 							break;
    104 				if (n <= 0)
    105 					break;
    106 			}
    107 			f = 1;
    108 		}
    109 	}
    110 	else
    111 	{
    112 		/* current quadrant */
    113 		iy = y;
    114 		qx = Ship.quadx;
    115 		qy = Ship.quady;
    116 		q = &Quad[qx][qy];
    117 		f = 1;
    118 	}
    119 	if (f)
    120 	{
    121 		/* supernova is in same quadrant as Enterprise */
    122 		printf("\nRED ALERT: supernova occuring at %d,%d\n", ix, iy);
    123 		dx = ix - Ship.sectx;
    124 		dy = iy - Ship.secty;
    125 		if (dx * dx + dy * dy <= 2)
    126 		{
    127 			printf("***  Emergency override attem");
    128 			sleep(1);
    129 			printf("\n");
    130 			lose(L_SNOVA);
    131 		}
    132 		q->scanned = 1000;
    133 	}
    134 	else
    135 	{
    136 		if (!damaged(SSRADIO))
    137 		{
    138 			q->scanned = 1000;
    139 			printf("\nUhura: Captain, Starfleet Command reports a supernova\n");
    140 			printf("  in quadrant %d,%d.  Caution is advised\n", qx, qy);
    141 		}
    142 	}
    143 
    144 	/* clear out the supernova'ed quadrant */
    145 	dx = q->klings;
    146 	dy = q->stars;
    147 	Now.klings -= dx;
    148 	if (x >= 0)
    149 	{
    150 		/* Enterprise caused supernova */
    151 		Game.kills += dy;
    152 		if (q->bases)
    153 			killb(qx, qy);
    154 		Game.killk += dx;
    155 	}
    156 	else
    157 		if (q->bases)
    158 			killb(qx, qy);
    159 	killd(qx, qy, (x >= 0));
    160 	q->stars = -1;
    161 	q->klings = 0;
    162 	if (Now.klings <= 0)
    163 	{
    164 		printf("Lucky devil, that supernova destroyed the last klingon\n");
    165 		win();
    166 	}
    167 	return;
    168 }
    169