386BSD 0.1 development
[unix-history] / usr / othersrc / games / trek / impulse.c
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f54f2bac
WJ
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, 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
34#ifndef lint
35static char sccsid[] = "@(#)impulse.c 5.4 (Berkeley) 6/1/90";
36#endif /* not lint */
37
38# include "trek.h"
39
40/**
41 ** move under impulse power
42 **/
43
44impulse()
45{
46 int course;
47 register int power;
48 double dist, time;
49 register int percent;
50 extern double move();
51
52 if (Ship.cond == DOCKED)
53 return (printf("Scotty: Sorry captain, but we are still docked.\n"));
54 if (damaged(IMPULSE))
55 return (out(IMPULSE));
56 if (getcodi(&course, &dist))
57 return;
58 power = 20 + 100 * dist;
59 percent = 100 * power / Ship.energy + 0.5;
60 if (percent >= 85)
61 {
62 printf("Scotty: That would consume %d%% of our remaining energy.\n",
63 percent);
64 if (!getynpar("Are you sure that is wise"))
65 return;
66 printf("Aye aye, sir\n");
67 }
68 time = dist / 0.095;
69 percent = 100 * time / Now.time + 0.5;
70 if (percent >= 85)
71 {
72 printf("Spock: That would take %d%% of our remaining time.\n",
73 percent);
74 if (!getynpar("Are you sure that is wise"))
75 return;
76 printf("(He's finally gone mad)\n");
77 }
78 Move.time = move(0, course, time, 0.095);
79 Ship.energy -= 20 + 100 * Move.time * 0.095;
80}