xref: /original-bsd/games/trek/impulse.c (revision 6fcea464)
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 are permitted
6  * provided that the above copyright notice and this paragraph are
7  * duplicated in all such forms and that any documentation,
8  * advertising materials, and other materials related to such
9  * distribution and use acknowledge that the software was developed
10  * by the University of California, Berkeley.  The name of the
11  * University may not be used to endorse or promote products derived
12  * from this software without specific prior written permission.
13  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
14  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
15  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
16  */
17 
18 #ifndef lint
19 static char sccsid[] = "@(#)impulse.c	5.3 (Berkeley) 06/18/88";
20 #endif /* not lint */
21 
22 # include	"trek.h"
23 
24 /**
25  **	move under impulse power
26  **/
27 
28 impulse()
29 {
30 	int			course;
31 	register int		power;
32 	double			dist, time;
33 	register int		percent;
34 	extern double		move();
35 
36 	if (Ship.cond == DOCKED)
37 		return (printf("Scotty: Sorry captain, but we are still docked.\n"));
38 	if (damaged(IMPULSE))
39 		return (out(IMPULSE));
40 	if (getcodi(&course, &dist))
41 		return;
42 	power = 20 + 100 * dist;
43 	percent = 100 * power / Ship.energy + 0.5;
44 	if (percent >= 85)
45 	{
46 		printf("Scotty: That would consume %d%% of our remaining energy.\n",
47 			percent);
48 		if (!getynpar("Are you sure that is wise"))
49 			return;
50 		printf("Aye aye, sir\n");
51 	}
52 	time = dist / 0.095;
53 	percent = 100 * time / Now.time + 0.5;
54 	if (percent >= 85)
55 	{
56 		printf("Spock: That would take %d%% of our remaining time.\n",
57 			percent);
58 		if (!getynpar("Are you sure that is wise"))
59 			return;
60 		printf("(He's finally gone mad)\n");
61 	}
62 	Move.time = move(0, course, time, 0.095);
63 	Ship.energy -= 20 + 100 * Move.time * 0.095;
64 }
65