1 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
2 /* hack.track.c - version 1.0.2 */
18 if(utcnt < UTSZ) utcnt++;
19 if(utpnt == UTSZ) utpnt = 0;
20 utrack[utpnt].x = u.ux;
21 utrack[utpnt].y = u.uy;
26 gettrack(x,y) register x,y; {
27 register int i,cnt,dist;
30 for(i = utpnt-1; cnt--; i--){
31 if(i == -1) i = UTSZ-1;
33 dist = (x-tc.x)*(x-tc.x) + (y-tc.y)*(y-tc.y);
35 return(dist ? &(utrack[i]) : 0);