Commit | Line | Data |
---|---|---|
9758240b KM |
1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
e9fb6bea KB |
3 | * All rights reserved. |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
d99e6414 KB |
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. | |
9758240b KM |
16 | */ |
17 | ||
b8768ee6 | 18 | #ifndef lint |
d99e6414 | 19 | static char sccsid[] = "@(#)klmove.c 5.3 (Berkeley) %G%"; |
e9fb6bea | 20 | #endif /* not lint */ |
b8768ee6 KM |
21 | |
22 | # include "trek.h" | |
23 | ||
24 | /* | |
25 | ** Move Klingons Around | |
26 | ** | |
27 | ** This is a largely incomprehensible block of code that moves | |
28 | ** Klingons around in a quadrant. It was written in a very | |
29 | ** "program as you go" fashion, and is a prime candidate for | |
30 | ** rewriting. | |
31 | ** | |
32 | ** The flag `fl' is zero before an attack, one after an attack, | |
33 | ** and two if you are leaving a quadrant. This serves to | |
34 | ** change the probability and distance that it moves. | |
35 | ** | |
36 | ** Basically, what it will try to do is to move a certain number | |
37 | ** of steps either toward you or away from you. It will avoid | |
38 | ** stars whenever possible. Nextx and nexty are the next | |
39 | ** sector to move to on a per-Klingon basis; they are roughly | |
40 | ** equivalent to Ship.sectx and Ship.secty for the starship. Lookx and | |
41 | ** looky are the sector that you are going to look at to see | |
42 | ** if you can move their. Dx and dy are the increment. Fudgex | |
43 | ** and fudgey are the things you change around to change your | |
44 | ** course around stars. | |
45 | */ | |
46 | ||
47 | klmove(fl) | |
48 | int fl; | |
49 | { | |
50 | int n; | |
51 | register struct kling *k; | |
52 | double dx, dy; | |
53 | int nextx, nexty; | |
54 | register int lookx, looky; | |
55 | int motion; | |
56 | int fudgex, fudgey; | |
57 | int qx, qy; | |
58 | double bigger; | |
59 | int i; | |
60 | ||
61 | # ifdef xTRACE | |
62 | if (Trace) | |
63 | printf("klmove: fl = %d, Etc.nkling = %d\n", fl, Etc.nkling); | |
64 | # endif | |
65 | for (n = 0; n < Etc.nkling; k && n++) | |
66 | { | |
67 | k = &Etc.klingon[n]; | |
68 | i = 100; | |
69 | if (fl) | |
70 | i = 100.0 * k->power / Param.klingpwr; | |
71 | if (ranf(i) >= Param.moveprob[2 * Move.newquad + fl]) | |
72 | continue; | |
73 | /* compute distance to move */ | |
74 | motion = ranf(75) - 25; | |
06d69904 | 75 | motion *= k->avgdist * Param.movefac[2 * Move.newquad + fl]; |
b8768ee6 KM |
76 | /* compute direction */ |
77 | dx = Ship.sectx - k->x + ranf(3) - 1; | |
78 | dy = Ship.secty - k->y + ranf(3) - 1; | |
79 | bigger = dx; | |
80 | if (dy > bigger) | |
81 | bigger = dy; | |
82 | if (bigger == 0.0) | |
83 | bigger = 1.0; | |
84 | dx = dx / bigger + 0.5; | |
85 | dy = dy / bigger + 0.5; | |
86 | if (motion < 0) | |
87 | { | |
88 | motion = -motion; | |
89 | dx = -dx; | |
90 | dy = -dy; | |
91 | } | |
92 | fudgex = fudgey = 1; | |
93 | /* try to move the klingon */ | |
94 | nextx = k->x; | |
95 | nexty = k->y; | |
96 | for (; motion > 0; motion--) | |
97 | { | |
98 | lookx = nextx + dx; | |
99 | looky = nexty + dy; | |
100 | if (lookx < 0 || lookx >= NSECTS || looky < 0 || looky >= NSECTS) | |
101 | { | |
102 | /* new quadrant */ | |
103 | qx = Ship.quadx; | |
104 | qy = Ship.quady; | |
105 | if (lookx < 0) | |
06d69904 | 106 | qx -= 1; |
b8768ee6 KM |
107 | else |
108 | if (lookx >= NSECTS) | |
06d69904 | 109 | qx += 1; |
b8768ee6 | 110 | if (looky < 0) |
06d69904 | 111 | qy -= 1; |
b8768ee6 KM |
112 | else |
113 | if (looky >= NSECTS) | |
06d69904 | 114 | qy += 1; |
b8768ee6 KM |
115 | if (qx < 0 || qx >= NQUADS || qy < 0 || qy >= NQUADS || |
116 | Quad[qx][qy].stars < 0 || Quad[qx][qy].klings > MAXKLQUAD - 1) | |
117 | break; | |
118 | if (!damaged(SRSCAN)) | |
119 | { | |
120 | printf("Klingon at %d,%d escapes to quadrant %d,%d\n", | |
121 | k->x, k->y, qx, qy); | |
122 | motion = Quad[qx][qy].scanned; | |
123 | if (motion >= 0 && motion < 1000) | |
06d69904 | 124 | Quad[qx][qy].scanned += 100; |
b8768ee6 KM |
125 | motion = Quad[Ship.quadx][Ship.quady].scanned; |
126 | if (motion >= 0 && motion < 1000) | |
06d69904 | 127 | Quad[Ship.quadx][Ship.quady].scanned -= 100; |
b8768ee6 KM |
128 | } |
129 | Sect[k->x][k->y] = EMPTY; | |
06d69904 KL |
130 | Quad[qx][qy].klings += 1; |
131 | Etc.nkling -= 1; | |
b8768ee6 | 132 | bmove(&Etc.klingon[Etc.nkling], k, sizeof *k); |
06d69904 | 133 | Quad[Ship.quadx][Ship.quady].klings -= 1; |
b8768ee6 KM |
134 | k = 0; |
135 | break; | |
136 | } | |
137 | if (Sect[lookx][looky] != EMPTY) | |
138 | { | |
139 | lookx = nextx + fudgex; | |
140 | if (lookx < 0 || lookx >= NSECTS) | |
141 | lookx = nextx + dx; | |
142 | if (Sect[lookx][looky] != EMPTY) | |
143 | { | |
144 | fudgex = -fudgex; | |
145 | looky = nexty + fudgey; | |
146 | if (looky < 0 || looky >= NSECTS || Sect[lookx][looky] != EMPTY) | |
147 | { | |
148 | fudgey = -fudgey; | |
149 | break; | |
150 | } | |
151 | } | |
152 | } | |
153 | nextx = lookx; | |
154 | nexty = looky; | |
155 | } | |
156 | if (k && (k->x != nextx || k->y != nexty)) | |
157 | { | |
158 | if (!damaged(SRSCAN)) | |
159 | printf("Klingon at %d,%d moves to %d,%d\n", | |
160 | k->x, k->y, nextx, nexty); | |
161 | Sect[k->x][k->y] = EMPTY; | |
162 | Sect[k->x = nextx][k->y = nexty] = KLINGON; | |
163 | } | |
164 | } | |
165 | compkldist(0); | |
166 | } |