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      1 /*	$NetBSD: nova.c,v 1.8 2009/05/24 21:44:56 dholland 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. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 #if 0
     35 static char sccsid[] = "@(#)nova.c	8.1 (Berkeley) 5/31/93";
     36 #else
     37 __RCSID("$NetBSD: nova.c,v 1.8 2009/05/24 21:44:56 dholland Exp $");
     38 #endif
     39 #endif /* not lint */
     40 
     41 #include <stdio.h>
     42 #include "trek.h"
     43 
     44 /*
     45 **  CAUSE A NOVA TO OCCUR
     46 **
     47 **	A nova occurs.  It is the result of having a star hit with
     48 **	a photon torpedo.  There are several things which may happen.
     49 **	The star may not be affected.  It may go nova.  It may turn
     50 **	into a black hole.  Any (yummy) it may go supernova.
     51 **
     52 **	Stars that go nova cause stars which surround them to undergo
     53 **	the same probabilistic process.  Klingons next to them are
     54 **	destroyed.  And if the starship is next to it, it gets zapped.
     55 **	If the zap is too much, it gets destroyed.
     56 */
     57 
     58 void
     59 nova(int x, int y)
     60 {
     61 	int	i, j;
     62 	int	se;
     63 
     64 	if (Sect[x][y] != STAR || Quad[Ship.quadx][Ship.quady].stars < 0)
     65 		return;
     66 	if (ranf(100) < 15) {
     67 		printf("Spock: Star at %d,%d failed to nova.\n", x, y);
     68 		return;
     69 	}
     70 	if (ranf(100) < 5) {
     71 		snova(x, y);
     72 		return;
     73 	}
     74 	printf("Spock: Star at %d,%d gone nova\n", x, y);
     75 
     76 	if (ranf(4) != 0) {
     77 		Sect[x][y] = EMPTY;
     78 	} else {
     79 		Sect[x][y] = HOLE;
     80 		Quad[Ship.quadx][Ship.quady].holes += 1;
     81 	}
     82 	Quad[Ship.quadx][Ship.quady].stars -= 1;
     83 	Game.kills += 1;
     84 	for (i = x - 1; i <= x + 1; i++) {
     85 		if (i < 0 || i >= NSECTS)
     86 			continue;
     87 		for (j = y - 1; j <= y + 1; j++) {
     88 			if (j < 0 || j >= NSECTS)
     89 				continue;
     90 			se = Sect[i][j];
     91 			switch (se) {
     92 
     93 			  case EMPTY:
     94 			  case HOLE:
     95 				break;
     96 
     97 			  case KLINGON:
     98 				killk(i, j);
     99 				break;
    100 
    101 			  case STAR:
    102 				nova(i, j);
    103 				break;
    104 
    105 			  case INHABIT:
    106 				kills(i, j, -1);
    107 				break;
    108 
    109 			  case BASE:
    110 				killb(i, j);
    111 				Game.killb += 1;
    112 				break;
    113 
    114 			  case ENTERPRISE:
    115 			  case QUEENE:
    116 				se = 2000;
    117 				if (Ship.shldup) {
    118 					if (Ship.shield >= se) {
    119 						Ship.shield -= se;
    120 						se = 0;
    121 					} else {
    122 						se -= Ship.shield;
    123 						Ship.shield = 0;
    124 					}
    125 				}
    126 				Ship.energy -= se;
    127 				if (Ship.energy <= 0)
    128 					lose(L_SUICID);
    129 				break;
    130 
    131 			  default:
    132 				printf("Unknown object %c at %d,%d destroyed\n",
    133 					se, i, j);
    134 				Sect[i][j] = EMPTY;
    135 				break;
    136 			}
    137 		}
    138 	}
    139 	return;
    140 }
    141