1 /* SCCS Id: @(#)track.c 3.4 87/08/08 */
2 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
3 /* NetHack may be freely redistributed. See license for details. */
4 /* track.c - version 1.0.2 */
10 STATIC_VAR NEARDATA int utcnt, utpnt;
11 STATIC_VAR NEARDATA coord utrack[UTSZ];
28 if(utcnt < UTSZ) utcnt++;
29 if(utpnt == UTSZ) utpnt = 0;
30 utrack[utpnt].x = u.ux;
31 utrack[utpnt].y = u.uy;
42 register int cnt, ndist;
45 for(tc = &utrack[utpnt]; cnt--; ){
46 if(tc == utrack) tc = &utrack[UTSZ-1];
48 ndist = distmin(x,y,tc->x,tc->y);
50 /* if far away, skip track entries til we're closer */
52 ndist -= 2; /* be careful due to extra decrement at top of loop */
55 return (coord *) 0; /* too far away, no matches possible */
56 if(tc < &utrack[ndist])
61 return(ndist ? tc : 0);