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9758240b KM |
1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | */ | |
6 | ||
b8768ee6 | 7 | #ifndef lint |
9758240b | 8 | static char sccsid[] = "@(#)klmove.c 5.1 (Berkeley) %G%"; |
b8768ee6 KM |
9 | #endif not lint |
10 | ||
11 | # include "trek.h" | |
12 | ||
13 | /* | |
14 | ** Move Klingons Around | |
15 | ** | |
16 | ** This is a largely incomprehensible block of code that moves | |
17 | ** Klingons around in a quadrant. It was written in a very | |
18 | ** "program as you go" fashion, and is a prime candidate for | |
19 | ** rewriting. | |
20 | ** | |
21 | ** The flag `fl' is zero before an attack, one after an attack, | |
22 | ** and two if you are leaving a quadrant. This serves to | |
23 | ** change the probability and distance that it moves. | |
24 | ** | |
25 | ** Basically, what it will try to do is to move a certain number | |
26 | ** of steps either toward you or away from you. It will avoid | |
27 | ** stars whenever possible. Nextx and nexty are the next | |
28 | ** sector to move to on a per-Klingon basis; they are roughly | |
29 | ** equivalent to Ship.sectx and Ship.secty for the starship. Lookx and | |
30 | ** looky are the sector that you are going to look at to see | |
31 | ** if you can move their. Dx and dy are the increment. Fudgex | |
32 | ** and fudgey are the things you change around to change your | |
33 | ** course around stars. | |
34 | */ | |
35 | ||
36 | klmove(fl) | |
37 | int fl; | |
38 | { | |
39 | int n; | |
40 | register struct kling *k; | |
41 | double dx, dy; | |
42 | int nextx, nexty; | |
43 | register int lookx, looky; | |
44 | int motion; | |
45 | int fudgex, fudgey; | |
46 | int qx, qy; | |
47 | double bigger; | |
48 | int i; | |
49 | ||
50 | # ifdef xTRACE | |
51 | if (Trace) | |
52 | printf("klmove: fl = %d, Etc.nkling = %d\n", fl, Etc.nkling); | |
53 | # endif | |
54 | for (n = 0; n < Etc.nkling; k && n++) | |
55 | { | |
56 | k = &Etc.klingon[n]; | |
57 | i = 100; | |
58 | if (fl) | |
59 | i = 100.0 * k->power / Param.klingpwr; | |
60 | if (ranf(i) >= Param.moveprob[2 * Move.newquad + fl]) | |
61 | continue; | |
62 | /* compute distance to move */ | |
63 | motion = ranf(75) - 25; | |
06d69904 | 64 | motion *= k->avgdist * Param.movefac[2 * Move.newquad + fl]; |
b8768ee6 KM |
65 | /* compute direction */ |
66 | dx = Ship.sectx - k->x + ranf(3) - 1; | |
67 | dy = Ship.secty - k->y + ranf(3) - 1; | |
68 | bigger = dx; | |
69 | if (dy > bigger) | |
70 | bigger = dy; | |
71 | if (bigger == 0.0) | |
72 | bigger = 1.0; | |
73 | dx = dx / bigger + 0.5; | |
74 | dy = dy / bigger + 0.5; | |
75 | if (motion < 0) | |
76 | { | |
77 | motion = -motion; | |
78 | dx = -dx; | |
79 | dy = -dy; | |
80 | } | |
81 | fudgex = fudgey = 1; | |
82 | /* try to move the klingon */ | |
83 | nextx = k->x; | |
84 | nexty = k->y; | |
85 | for (; motion > 0; motion--) | |
86 | { | |
87 | lookx = nextx + dx; | |
88 | looky = nexty + dy; | |
89 | if (lookx < 0 || lookx >= NSECTS || looky < 0 || looky >= NSECTS) | |
90 | { | |
91 | /* new quadrant */ | |
92 | qx = Ship.quadx; | |
93 | qy = Ship.quady; | |
94 | if (lookx < 0) | |
06d69904 | 95 | qx -= 1; |
b8768ee6 KM |
96 | else |
97 | if (lookx >= NSECTS) | |
06d69904 | 98 | qx += 1; |
b8768ee6 | 99 | if (looky < 0) |
06d69904 | 100 | qy -= 1; |
b8768ee6 KM |
101 | else |
102 | if (looky >= NSECTS) | |
06d69904 | 103 | qy += 1; |
b8768ee6 KM |
104 | if (qx < 0 || qx >= NQUADS || qy < 0 || qy >= NQUADS || |
105 | Quad[qx][qy].stars < 0 || Quad[qx][qy].klings > MAXKLQUAD - 1) | |
106 | break; | |
107 | if (!damaged(SRSCAN)) | |
108 | { | |
109 | printf("Klingon at %d,%d escapes to quadrant %d,%d\n", | |
110 | k->x, k->y, qx, qy); | |
111 | motion = Quad[qx][qy].scanned; | |
112 | if (motion >= 0 && motion < 1000) | |
06d69904 | 113 | Quad[qx][qy].scanned += 100; |
b8768ee6 KM |
114 | motion = Quad[Ship.quadx][Ship.quady].scanned; |
115 | if (motion >= 0 && motion < 1000) | |
06d69904 | 116 | Quad[Ship.quadx][Ship.quady].scanned -= 100; |
b8768ee6 KM |
117 | } |
118 | Sect[k->x][k->y] = EMPTY; | |
06d69904 KL |
119 | Quad[qx][qy].klings += 1; |
120 | Etc.nkling -= 1; | |
b8768ee6 | 121 | bmove(&Etc.klingon[Etc.nkling], k, sizeof *k); |
06d69904 | 122 | Quad[Ship.quadx][Ship.quady].klings -= 1; |
b8768ee6 KM |
123 | k = 0; |
124 | break; | |
125 | } | |
126 | if (Sect[lookx][looky] != EMPTY) | |
127 | { | |
128 | lookx = nextx + fudgex; | |
129 | if (lookx < 0 || lookx >= NSECTS) | |
130 | lookx = nextx + dx; | |
131 | if (Sect[lookx][looky] != EMPTY) | |
132 | { | |
133 | fudgex = -fudgex; | |
134 | looky = nexty + fudgey; | |
135 | if (looky < 0 || looky >= NSECTS || Sect[lookx][looky] != EMPTY) | |
136 | { | |
137 | fudgey = -fudgey; | |
138 | break; | |
139 | } | |
140 | } | |
141 | } | |
142 | nextx = lookx; | |
143 | nexty = looky; | |
144 | } | |
145 | if (k && (k->x != nextx || k->y != nexty)) | |
146 | { | |
147 | if (!damaged(SRSCAN)) | |
148 | printf("Klingon at %d,%d moves to %d,%d\n", | |
149 | k->x, k->y, nextx, nexty); | |
150 | Sect[k->x][k->y] = EMPTY; | |
151 | Sect[k->x = nextx][k->y = nexty] = KLINGON; | |
152 | } | |
153 | } | |
154 | compkldist(0); | |
155 | } |