xref: /dragonfly/games/trek/autover.c (revision 9348a738)
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. Neither the name of the University nor the names of its contributors
14  *    may be used to endorse or promote products derived from this software
15  *    without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  * @(#)autover.c	8.1 (Berkeley) 5/31/93
30  * $FreeBSD: src/games/trek/autover.c,v 1.4 1999/11/30 03:49:43 billf Exp $
31  * $DragonFly: src/games/trek/autover.c,v 1.3 2006/09/07 21:19:44 pavalos Exp $
32  */
33 
34 #include "trek.h"
35 
36 /*
37 **  Automatic Override
38 **
39 **	If we should be so unlucky as to be caught in a quadrant
40 **	with a supernova in it, this routine is called.  It is
41 **	called from checkcond().
42 **
43 **	It sets you to a random warp (guaranteed to be over 6.0)
44 **	and starts sending you off "somewhere" (whereever that is).
45 **
46 **	Please note that it is VERY important that you reset your
47 **	warp speed after the automatic override is called.  The new
48 **	warp factor does not stay in effect for just this routine.
49 **
50 **	This routine will never try to send you more than sqrt(2)
51 **	quadrants, since that is all that is needed.
52 */
53 
54 void
55 autover(void)
56 {
57 	double			dist;
58 	int		course;
59 
60 	printf("\07RED ALERT:  The %s is in a supernova quadrant\n",
61 		Ship.shipname);
62 	printf("***  Emergency override attempts to hurl %s to safety\n",
63 		Ship.shipname);
64 	/* let's get our ass out of here */
65 	Ship.warp = 6.0 + 2.0 * franf();
66 	Ship.warp2 = Ship.warp * Ship.warp;
67 	Ship.warp3 = Ship.warp2 * Ship.warp;
68 	dist = 0.75 * Ship.energy / (Ship.warp3 * (Ship.shldup + 1));
69 	if (dist > 1.4142)
70 		dist = 1.4142;
71 	course = ranf(360);
72 	Etc.nkling = -1;
73 	Ship.cond = RED;
74 	warp(-1, course, dist);
75 	attack(0);
76 }
77