xref: /openbsd/games/trek/impulse.c (revision 404b540a)
1 /*	$OpenBSD: impulse.c,v 1.4 2003/06/03 03:01:41 millert Exp $	*/
2 /*	$NetBSD: impulse.c,v 1.3 1995/04/22 10:59:03 cgd Exp $	*/
3 
4 /*
5  * Copyright (c) 1980, 1993
6  *	The Regents of the University of California.  All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  * 3. Neither the name of the University nor the names of its contributors
17  *    may be used to endorse or promote products derived from this software
18  *    without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30  * SUCH DAMAGE.
31  */
32 
33 #ifndef lint
34 #if 0
35 static char sccsid[] = "@(#)impulse.c	8.1 (Berkeley) 5/31/93";
36 #else
37 static char rcsid[] = "$OpenBSD: impulse.c,v 1.4 2003/06/03 03:01:41 millert Exp $";
38 #endif
39 #endif /* not lint */
40 
41 #include <stdio.h>
42 #include "trek.h"
43 #include "getpar.h"
44 
45 /**
46  **	move under impulse power
47  **/
48 
49 void
50 impulse(v)
51 	int v;
52 {
53 	int	course, power, percent;
54 	double	dist, time;
55 
56 	if (Ship.cond == DOCKED)
57 	{
58 		printf("Scotty: Sorry captain, but we are still docked.\n");
59 		return;
60 	}
61 	if (damaged(IMPULSE))
62 	{
63 		out(IMPULSE);
64 		return;
65 	}
66 	if (getcodi(&course, &dist))
67 		return;
68 	power = 20 + 100 * dist;
69 	percent = 100 * power / Ship.energy + 0.5;
70 	if (percent >= 85)
71 	{
72 		printf("Scotty: That would consume %d%% of our remaining energy.\n",
73 			percent);
74 		if (!getynpar("Are you sure that is wise"))
75 			return;
76 		printf("Aye aye, sir\n");
77 	}
78 	time = dist / 0.095;
79 	percent = 100 * time / Now.time + 0.5;
80 	if (percent >= 85)
81 	{
82 		printf("Spock: That would take %d%% of our remaining time.\n",
83 			percent);
84 		if (!getynpar("Are you sure that is wise"))
85 			return;
86 		printf("(He's finally gone mad)\n");
87 	}
88 	Move.time = move(0, course, time, 0.095);
89 	Ship.energy -= 20 + 100 * Move.time * 0.095;
90 }
91