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33 * @(#)compkl.c 8.1 (Berkeley) 5/31/93
34 * $FreeBSD: src/games/trek/compkl.c,v 1.4 1999/11/30 03:49:44 billf Exp $
35 * $DragonFly: src/games/trek/compkl.c,v 1.2 2003/06/17 04:25:25 dillon Exp $
41 ** compute klingon distances
43 ** The klingon list has the distances for all klingons recomputed
44 ** and sorted. The parameter is a Boolean flag which is set if
45 ** we have just entered a new quadrant.
47 ** This routine is used every time the Enterprise or the Klingons
52 int f; /* set if new quadrant */
60 for (i = 0; i < Etc.nkling; i++)
62 /* compute distance to the Klingon */
63 dx = Ship.sectx - Etc.klingon[i].x;
64 dy = Ship.secty - Etc.klingon[i].y;
65 d = dx * dx + dy * dy;
68 /* compute average of new and old distances to Klingon */
71 temp = Etc.klingon[i].dist;
72 Etc.klingon[i].avgdist = 0.5 * (temp + d);
76 /* new quadrant: average is current */
77 Etc.klingon[i].avgdist = d;
79 Etc.klingon[i].dist = d;
82 /* leave them sorted */
90 ** bubble sort on ascending distance
103 for (i = 0; i < m; i++)
104 if (Etc.klingon[i].dist > Etc.klingon[i+1].dist)
106 bmove(&Etc.klingon[i], &t, sizeof t);
107 bmove(&Etc.klingon[i+1], &Etc.klingon[i], sizeof t);
108 bmove(&t, &Etc.klingon[i+1], sizeof t);