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TRACK.C
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C/C++ Source or Header
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1990-07-18
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963b
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53 lines
/* SCCS Id: @(#)track.c 3.0 87/08/08
/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/* NetHack may be freely redistributed. See license for details. */
/* track.c - version 1.0.2 */
#include "hack.h"
#define UTSZ 50
STATIC_VAR int NEARDATA utcnt, NEARDATA utpnt;
STATIC_VAR coord NEARDATA utrack[UTSZ];
#ifdef OVLB
void
initrack(){
utcnt = utpnt = 0;
}
#endif /* OVLB */
#ifdef OVL1
/* add to track */
void
settrack(){
if(utcnt < UTSZ) utcnt++;
if(utpnt == UTSZ) utpnt = 0;
utrack[utpnt].x = u.ux;
utrack[utpnt].y = u.uy;
utpnt++;
}
#endif /* OVL1 */
#ifdef OVL0
coord *
gettrack(x, y)
register int x, y;
{
register int i, cnt, ndist;
coord tc;
cnt = utcnt;
for(i = utpnt-1; cnt--; i--){
if(i == -1) i = UTSZ-1;
tc = utrack[i];
ndist = dist2(x,y,tc.x,tc.y);
if(ndist < 3)
return(ndist ? (coord *)&(utrack[i]) : 0);
}
return (coord *)0;
}
#endif /* OVL0 */