/* * Copyright (c) 1980 Regents of the University of California. * All rights reserved. The Berkeley software License Agreement * specifies the terms and conditions for redistribution. */ #ifndef lint static char sccsid[] = "@(#)klmove.c 5.1 (Berkeley) 1/29/86"; #endif not lint # include "trek.h" /* ** Move Klingons Around ** ** This is a largely incomprehensible block of code that moves ** Klingons around in a quadrant. It was written in a very ** "program as you go" fashion, and is a prime candidate for ** rewriting. ** ** The flag `fl' is zero before an attack, one after an attack, ** and two if you are leaving a quadrant. This serves to ** change the probability and distance that it moves. ** ** Basically, what it will try to do is to move a certain number ** of steps either toward you or away from you. It will avoid ** stars whenever possible. Nextx and nexty are the next ** sector to move to on a per-Klingon basis; they are roughly ** equivalent to Ship.sectx and Ship.secty for the starship. Lookx and ** looky are the sector that you are going to look at to see ** if you can move their. Dx and dy are the increment. Fudgex ** and fudgey are the things you change around to change your ** course around stars. */ klmove(fl) int fl; { int n; register struct kling *k; double dx, dy; int nextx, nexty; register int lookx, looky; int motion; int fudgex, fudgey; int qx, qy; double bigger; int i; # ifdef xTRACE if (Trace) printf("klmove: fl = %d, Etc.nkling = %d\n", fl, Etc.nkling); # endif for (n = 0; n < Etc.nkling; k && n++) { k = &Etc.klingon[n]; i = 100; if (fl) i = 100.0 * k->power / Param.klingpwr; if (ranf(i) >= Param.moveprob[2 * Move.newquad + fl]) continue; /* compute distance to move */ motion = ranf(75) - 25; motion *= k->avgdist * Param.movefac[2 * Move.newquad + fl]; /* compute direction */ dx = Ship.sectx - k->x + ranf(3) - 1; dy = Ship.secty - k->y + ranf(3) - 1; bigger = dx; if (dy > bigger) bigger = dy; if (bigger == 0.0) bigger = 1.0; dx = dx / bigger + 0.5; dy = dy / bigger + 0.5; if (motion < 0) { motion = -motion; dx = -dx; dy = -dy; } fudgex = fudgey = 1; /* try to move the klingon */ nextx = k->x; nexty = k->y; for (; motion > 0; motion--) { lookx = nextx + dx; looky = nexty + dy; if (lookx < 0 || lookx >= NSECTS || looky < 0 || looky >= NSECTS) { /* new quadrant */ qx = Ship.quadx; qy = Ship.quady; if (lookx < 0) qx -= 1; else if (lookx >= NSECTS) qx += 1; if (looky < 0) qy -= 1; else if (looky >= NSECTS) qy += 1; if (qx < 0 || qx >= NQUADS || qy < 0 || qy >= NQUADS || Quad[qx][qy].stars < 0 || Quad[qx][qy].klings > MAXKLQUAD - 1) break; if (!damaged(SRSCAN)) { printf("Klingon at %d,%d escapes to quadrant %d,%d\n", k->x, k->y, qx, qy); motion = Quad[qx][qy].scanned; if (motion >= 0 && motion < 1000) Quad[qx][qy].scanned += 100; motion = Quad[Ship.quadx][Ship.quady].scanned; if (motion >= 0 && motion < 1000) Quad[Ship.quadx][Ship.quady].scanned -= 100; } Sect[k->x][k->y] = EMPTY; Quad[qx][qy].klings += 1; Etc.nkling -= 1; bmove(&Etc.klingon[Etc.nkling], k, sizeof *k); Quad[Ship.quadx][Ship.quady].klings -= 1; k = 0; break; } if (Sect[lookx][looky] != EMPTY) { lookx = nextx + fudgex; if (lookx < 0 || lookx >= NSECTS) lookx = nextx + dx; if (Sect[lookx][looky] != EMPTY) { fudgex = -fudgex; looky = nexty + fudgey; if (looky < 0 || looky >= NSECTS || Sect[lookx][looky] != EMPTY) { fudgey = -fudgey; break; } } } nextx = lookx; nexty = looky; } if (k && (k->x != nextx || k->y != nexty)) { if (!damaged(SRSCAN)) printf("Klingon at %d,%d moves to %d,%d\n", k->x, k->y, nextx, nexty); Sect[k->x][k->y] = EMPTY; Sect[k->x = nextx][k->y = nexty] = KLINGON; } } compkldist(0); }