1 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */ 2 /* hack.track.c - version 1.0.2 */ 3 /* $FreeBSD: src/games/hack/hack.track.c,v 1.4 1999/11/16 10:26:38 marcel Exp $ */ 4 5 #include "hack.h" 6 7 #define UTSZ 50 8 9 coord utrack[UTSZ]; 10 int utcnt = 0; 11 int utpnt = 0; 12 13 initrack(){ 14 utcnt = utpnt = 0; 15 } 16 17 /* add to track */ 18 settrack(){ 19 if(utcnt < UTSZ) utcnt++; 20 if(utpnt == UTSZ) utpnt = 0; 21 utrack[utpnt].x = u.ux; 22 utrack[utpnt].y = u.uy; 23 utpnt++; 24 } 25 26 coord * 27 gettrack(x,y) int x,y; { 28 int i,cnt,dist; 29 coord tc; 30 cnt = utcnt; 31 for(i = utpnt-1; cnt--; i--){ 32 if(i == -1) i = UTSZ-1; 33 tc = utrack[i]; 34 dist = (x-tc.x)*(x-tc.x) + (y-tc.y)*(y-tc.y); 35 if(dist < 3) 36 return(dist ? &(utrack[i]) : 0); 37 } 38 return(0); 39 } 40