freebsd-dev/games/hack/hack.track.c
Marcel Moolenaar b945938c63 Add type int to those variables without a type. This is caused by the
frequent use of ``register var'' instead of ``register int var'' and
the removal of the register hint in the previous commit.
1999-11-16 10:26:38 +00:00

40 lines
658 B
C

/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/* hack.track.c - version 1.0.2 */
/* $FreeBSD$ */
#include "hack.h"
#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) int x,y; {
int i,cnt,dist;
coord tc;
cnt = utcnt;
for(i = utpnt-1; cnt--; i--){
if(i == -1) i = UTSZ-1;
tc = utrack[i];
dist = (x-tc.x)*(x-tc.x) + (y-tc.y)*(y-tc.y);
if(dist < 3)
return(dist ? &(utrack[i]) : 0);
}
return(0);
}