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- /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1984. */
-
- #include "hack.h"
- #ifdef TRACK
- #define UTSZ 50
-
- coord utrack[UTSZ];
- int utcnt = 0;
- int utpnt = 0;
-
- initrack(){
- utcnt = utpnt = 0;
- }
-
- /* add to track */
- settrack(){
- if(utcnt < UTSZ) utcnt++;
- if(utpnt == UTSZ) utpnt = 0;
- utrack[utpnt].x = u.ux;
- utrack[utpnt].y = u.uy;
- utpnt++;
- }
-
- coord *
- gettrack(x,y) register int x,y; {
- register int i,cnt;
- coord tc;
- cnt = utcnt;
- for(i = utpnt-1; cnt--; i--){
- if(i == -1) i = UTSZ-1;
- tc = utrack[i];
- if((x-tc.x)*(x-tc.x) + (y-tc.y)*(y-tc.y) < 3)
- return(&(utrack[i]));
- }
- return(0);
- }
- #endif TRACK
-