1 /* @(#)klmove.c 8.1 (Berkeley) 5/31/93 */
2 /* $NetBSD: klmove.c,v 1.9 2009/05/24 22:55:03 dholland Exp $ */
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37 ** Move Klingons Around
39 ** This is a largely incomprehensible block of code that moves
40 ** Klingons around in a quadrant. It was written in a very
41 ** "program as you go" fashion, and is a prime candidate for
44 ** The flag `fl' is zero before an attack, one after an attack,
45 ** and two if you are leaving a quadrant. This serves to
46 ** change the probability and distance that it moves.
48 ** Basically, what it will try to do is to move a certain number
49 ** of steps either toward you or away from you. It will avoid
50 ** stars whenever possible. Nextx and nexty are the next
51 ** sector to move to on a per-Klingon basis; they are roughly
52 ** equivalent to Ship.sectx and Ship.secty for the starship. Lookx and
53 ** looky are the sector that you are going to look at to see
54 ** if you can move their. Dx and dy are the increment. Fudgex
55 ** and fudgey are the things you change around to change your
56 ** course around stars.
75 printf("klmove: fl = %d, Etc.nkling = %d\n", fl, Etc.nkling);
77 for (n = 0; n < Etc.nkling; n++) {
81 i = 100.0 * k->power / Param.klingpwr;
82 if (ranf(i) >= Param.moveprob[2 * Move.newquad + fl])
84 /* compute distance to move */
85 motion = ranf(75) - 25;
86 motion *= k->avgdist * Param.movefac[2 * Move.newquad + fl];
87 /* compute direction */
88 dx = Ship.sectx - k->x + ranf(3) - 1;
89 dy = Ship.secty - k->y + ranf(3) - 1;
95 dx = dx / bigger + 0.5;
96 dy = dy / bigger + 0.5;
103 /* try to move the klingon */
106 for (; motion > 0; motion--) {
109 if (lookx < 0 || lookx >= NSECTS ||
110 looky < 0 || looky >= NSECTS) {
124 if (qx < 0 || qx >= NQUADS ||
125 qy < 0 || qy >= NQUADS ||
126 Quad[qx][qy].stars < 0 ||
127 Quad[qx][qy].klings > MAXKLQUAD - 1)
129 if (!damaged(SRSCAN)) {
130 printf("Klingon at %d,%d escapes to "
133 motion = Quad[qx][qy].scanned;
134 if (motion >= 0 && motion < 1000)
135 Quad[qx][qy].scanned += 100;
136 motion = Quad[Ship.quadx][Ship.quady]
138 if (motion >= 0 && motion < 1000)
139 Quad[Ship.quadx][Ship.quady]
142 Sect[k->x][k->y] = EMPTY;
143 Quad[qx][qy].klings += 1;
145 *k = Etc.klingon[Etc.nkling];
146 Quad[Ship.quadx][Ship.quady].klings -= 1;
150 if (Sect[lookx][looky] != EMPTY) {
151 lookx = nextx + fudgex;
152 if (lookx < 0 || lookx >= NSECTS)
154 if (Sect[lookx][looky] != EMPTY) {
156 looky = nexty + fudgey;
157 if (looky < 0 || looky >= NSECTS ||
158 Sect[lookx][looky] != EMPTY) {
167 if (k && (k->x != nextx || k->y != nexty)) {
168 if (!damaged(SRSCAN))
169 printf("Klingon at %d,%d moves to %d,%d\n",
170 k->x, k->y, nextx, nexty);
171 Sect[k->x][k->y] = EMPTY;
172 Sect[k->x = nextx][k->y = nexty] = KLINGON;