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snova.c revision 1.1 
      1 /*
      2  * Copyright (c) 1980 Regents of the University of California.
      3  * 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 
     34 #ifndef lint
     35 static char sccsid[] = "@(#)snova.c	5.4 (Berkeley) 6/1/90";
     36 #endif /* not lint */
     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 snova(x, y)
     62 int	x, y;
     63 {
     64 	int			qx, qy;
     65 	register int		ix, iy;
     66 	int			f;
     67 	int			dx, dy;
     68 	int			n;
     69 	register 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("\nRED ALERT: supernova occuring 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, -1);
    144 		Game.killk += dx;
    145 	}
    146 	else
    147 		if (q->bases)
    148 			killb(qx, qy, 0);
    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 }
    159