1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
|
/* $OpenBSD: torped.c,v 1.10 2016/01/07 14:37:51 mestre Exp $ */
/* $NetBSD: torped.c,v 1.3 1995/04/22 10:59:34 cgd Exp $ */
/*
* Copyright (c) 1980, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include "getpar.h"
#include "trek.h"
static int randcourse(int);
/*
** PHOTON TORPEDO CONTROL
**
** Either one or three photon torpedoes are fired. If three
** are fired, it is called a "burst" and you also specify
** a spread angle.
**
** Torpedoes are never 100% accurate. There is always a random
** cludge factor in their course which is increased if you have
** your shields up. Hence, you will find that they are more
** accurate at close range. However, they have the advantage that
** at long range they don't lose any of their power as phasers
** do, i.e., a hit is a hit is a hit, by any other name.
**
** When the course spreads too much, you get a misfire, and the
** course is randomized even more. You also have the chance that
** the misfire damages your torpedo tubes.
*/
void
torped(int v)
{
int ix, iy;
double x, y, dx, dy;
double angle;
int course, course2;
int k;
double bigger;
double sectsize;
int burst, n;
if (Ship.cloaked)
{
printf("Federation regulations do not permit attack while cloaked.\n");
return;
}
if (check_out(TORPED))
return;
if (Ship.torped <= 0)
{
printf("All photon torpedos expended\n");
return;
}
/* get the course */
course = getintpar("Torpedo course");
if (course < 0 || course > 360)
return;
burst = -1;
/* need at least three torpedoes for a burst */
if (Ship.torped < 3)
{
printf("No-burst mode selected\n");
burst = 0;
}
else
{
/* see if the user wants one */
if (!testnl())
{
k = ungetc(getchar(), stdin);
if (k >= '0' && k <= '9')
burst = 1;
}
}
if (burst < 0)
{
burst = getynpar("Do you want a burst");
}
if (burst)
{
burst = getintpar("burst angle");
if (burst <= 0)
return;
if (burst > 15)
{
printf("Maximum burst angle is 15 degrees\n");
return;
}
}
sectsize = NSECTS;
n = -1;
if (burst)
{
n = 1;
course -= burst;
}
for (; n && n <= 3; n++)
{
/* select a nice random course */
course2 = course + randcourse(n);
angle = course2 * 0.0174532925; /* convert to radians */
dx = -cos(angle);
dy = sin(angle);
bigger = fabs(dx);
x = fabs(dy);
if (x > bigger)
bigger = x;
dx /= bigger;
dy /= bigger;
x = Ship.sectx + 0.5;
y = Ship.secty + 0.5;
if (Ship.cond != DOCKED)
Ship.torped -= 1;
printf("Torpedo track");
if (n > 0)
printf(", torpedo number %d", n);
printf(":\n%6.1f\t%4.1f\n", x, y);
while (1)
{
ix = x += dx;
iy = y += dy;
if (x < 0.0 || x >= sectsize || y < 0.0 || y >= sectsize)
{
printf("Torpedo missed\n");
break;
}
printf("%6.1f\t%4.1f\n", x, y);
switch (Sect[ix][iy])
{
case EMPTY:
continue;
case HOLE:
printf("Torpedo disappears into a black hole\n");
break;
case KLINGON:
for (k = 0; k < Etc.nkling; k++)
{
if (Etc.klingon[k].x != ix || Etc.klingon[k].y != iy)
continue;
Etc.klingon[k].power -= 500 + ranf(501);
if (Etc.klingon[k].power > 0)
{
printf("*** Hit on Klingon at %d,%d: extensive damages\n",
ix, iy);
break;
}
killk(ix, iy);
break;
}
break;
case STAR:
nova(ix, iy);
break;
case INHABIT:
kills(ix, iy, -1);
break;
case BASE:
killb(Ship.quadx, Ship.quady);
Game.killb += 1;
break;
default:
printf("Unknown object %c at %d,%d destroyed\n",
Sect[ix][iy], ix, iy);
Sect[ix][iy] = EMPTY;
break;
}
break;
}
if (damaged(TORPED) || Quad[Ship.quadx][Ship.quady].stars < 0)
break;
course += burst;
}
Move.free = 0;
}
/*
** RANDOMIZE COURSE
**
** This routine randomizes the course for torpedo number 'n'.
** Other things handled by this routine are misfires, damages
** to the tubes, etc.
*/
static int
randcourse(int n)
{
double r;
int d;
d = ((franf() + franf()) - 1.0) * 20;
if (abs(d) > 12)
{
printf("Photon tubes misfire");
if (n < 0)
printf("\n");
else
printf(" on torpedo %d\n", n);
if (ranf(2))
{
damage(TORPED, 0.2 * abs(d) * (franf() + 1.0));
}
d *= 1.0 + 2.0 * franf();
}
if (Ship.shldup || Ship.cond == DOCKED)
{
r = Ship.shield;
r = 1.0 + r / Param.shield;
if (Ship.cond == DOCKED)
r = 2.0;
d *= r;
}
return (d);
}
|
