xref: /dragonfly/games/trek/impulse.c (revision 0ac6bf9d)
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. 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  * @(#)impulse.c	8.1 (Berkeley) 5/31/93
34  * $FreeBSD: src/games/trek/impulse.c,v 1.4 1999/11/30 03:49:48 billf Exp $
35  * $DragonFly: src/games/trek/impulse.c,v 1.3 2006/09/07 21:19:44 pavalos Exp $
36  */
37 
38 # include	"getpar.h"
39 # include	"trek.h"
40 
41 /**
42  **	move under impulse power
43  **/
44 
45 void
46 impulse(__unused int unused)
47 {
48 	int			course;
49 	int		power;
50 	double			dist, p_time;
51 	int		percent;
52 
53 	if (Ship.cond == DOCKED) {
54 		printf("Scotty: Sorry captain, but we are still docked.\n");
55 		return;
56 	}
57 	if (damaged(IMPULSE)) {
58 		out(IMPULSE);
59 		return;
60 	}
61 	if (getcodi(&course, &dist))
62 		return;
63 	power = 20 + 100 * dist;
64 	percent = 100 * power / Ship.energy + 0.5;
65 	if (percent >= 85)
66 	{
67 		printf("Scotty: That would consume %d%% of our remaining energy.\n",
68 			percent);
69 		if (!getynpar("Are you sure that is wise"))
70 			return;
71 		printf("Aye aye, sir\n");
72 	}
73 	p_time = dist / 0.095;
74 	percent = 100 * p_time / Now.time + 0.5;
75 	if (percent >= 85)
76 	{
77 		printf("Spock: That would take %d%% of our remaining time.\n",
78 			percent);
79 		if (!getynpar("Are you sure that is wise"))
80 			return;
81 		printf("(He's finally gone mad)\n");
82 	}
83 	Move.time = move(0, course, p_time, 0.095);
84 	Ship.energy -= 20 + 100 * Move.time * 0.095;
85 }
86