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snova.c revision 1.3 
      1 /*	$NetBSD: snova.c,v 1.3 1995/04/22 10:59:29 cgd 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 #ifndef lint
     37 #if 0
     38 static char sccsid[] = "@(#)snova.c	8.1 (Berkeley) 5/31/93";
     39 #else
     40 static char rcsid[] = "$NetBSD: snova.c,v 1.3 1995/04/22 10:59:29 cgd Exp $";
     41 #endif
     42 #endif /* not lint */
     43 
     44 # include	"trek.h"
     45 
     46 /*
     47 **  CAUSE SUPERNOVA TO OCCUR
     48 **
     49 **	A supernova occurs.  If 'ix' < 0, a random quadrant is chosen;
     50 **	otherwise, the current quadrant is taken, and (ix, iy) give
     51 **	the sector quadrants of the star which is blowing up.
     52 **
     53 **	If the supernova turns out to be in the quadrant you are in,
     54 **	you go into "emergency override mode", which tries to get you
     55 **	out of the quadrant as fast as possible.  However, if you
     56 **	don't have enough fuel, or if you by chance run into something,
     57 **	or some such thing, you blow up anyway.  Oh yeh, if you are
     58 **	within two sectors of the star, there is nothing that can
     59 **	be done for you.
     60 **
     61 **	When a star has gone supernova, the quadrant becomes uninhab-
     62 **	itable for the rest of eternity, i.e., the game.  If you ever
     63 **	try stopping in such a quadrant, you will go into emergency
     64 **	override mode.
     65 */
     66 
     67 snova(x, y)
     68 int	x, y;
     69 {
     70 	int			qx, qy;
     71 	register int		ix, iy;
     72 	int			f;
     73 	int			dx, dy;
     74 	int			n;
     75 	register struct quad	*q;
     76 
     77 	f = 0;
     78 	ix = x;
     79 	if (ix < 0)
     80 	{
     81 		/* choose a quadrant */
     82 		while (1)
     83 		{
     84 			qx = ranf(NQUADS);
     85 			qy = ranf(NQUADS);
     86 			q = &Quad[qx][qy];
     87 			if (q->stars > 0)
     88 				break;
     89 		}
     90 		if (Ship.quadx == qx && Ship.quady == qy)
     91 		{
     92 			/* select a particular star */
     93 			n = ranf(q->stars);
     94 			for (ix = 0; ix < NSECTS; ix++)
     95 			{
     96 				for (iy = 0; iy < NSECTS; iy++)
     97 					if (Sect[ix][iy] == STAR || Sect[ix][iy] == INHABIT)
     98 						if ((n -= 1) <= 0)
     99 							break;
    100 				if (n <= 0)
    101 					break;
    102 			}
    103 			f = 1;
    104 		}
    105 	}
    106 	else
    107 	{
    108 		/* current quadrant */
    109 		iy = y;
    110 		qx = Ship.quadx;
    111 		qy = Ship.quady;
    112 		q = &Quad[qx][qy];
    113 		f = 1;
    114 	}
    115 	if (f)
    116 	{
    117 		/* supernova is in same quadrant as Enterprise */
    118 		printf("\nRED ALERT: supernova occuring at %d,%d\n", ix, iy);
    119 		dx = ix - Ship.sectx;
    120 		dy = iy - Ship.secty;
    121 		if (dx * dx + dy * dy <= 2)
    122 		{
    123 			printf("***  Emergency override attem");
    124 			sleep(1);
    125 			printf("\n");
    126 			lose(L_SNOVA);
    127 		}
    128 		q->scanned = 1000;
    129 	}
    130 	else
    131 	{
    132 		if (!damaged(SSRADIO))
    133 		{
    134 			q->scanned = 1000;
    135 			printf("\nUhura: Captain, Starfleet Command reports a supernova\n");
    136 			printf("  in quadrant %d,%d.  Caution is advised\n", qx, qy);
    137 		}
    138 	}
    139 
    140 	/* clear out the supernova'ed quadrant */
    141 	dx = q->klings;
    142 	dy = q->stars;
    143 	Now.klings -= dx;
    144 	if (x >= 0)
    145 	{
    146 		/* Enterprise caused supernova */
    147 		Game.kills += dy;
    148 		if (q->bases)
    149 			killb(qx, qy, -1);
    150 		Game.killk += dx;
    151 	}
    152 	else
    153 		if (q->bases)
    154 			killb(qx, qy, 0);
    155 	killd(qx, qy, (x >= 0));
    156 	q->stars = -1;
    157 	q->klings = 0;
    158 	if (Now.klings <= 0)
    159 	{
    160 		printf("Lucky devil, that supernova destroyed the last klingon\n");
    161 		win();
    162 	}
    163 	return;
    164 }
    165