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File: [local] / src / games / hack / hack.track.c (download)

Revision 1.2, Sun Jan 28 23:41:46 2001 UTC (23 years, 4 months ago) by niklas
Branch: MAIN
CVS Tags: OPENBSD_3_2_BASE, OPENBSD_3_2, OPENBSD_3_1_BASE, OPENBSD_3_1, OPENBSD_3_0_BASE, OPENBSD_3_0, OPENBSD_2_9_BASE, OPENBSD_2_9
Changes since 1.1: +3 -1 lines 

$OpenBSD$

/*	$OpenBSD: hack.track.c,v 1.2 2001/01/28 23:41:46 niklas Exp $	*/

/*
 * Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985.
 */

#ifndef lint
static char rcsid[] = "$OpenBSD: hack.track.c,v 1.2 2001/01/28 23:41:46 niklas Exp $";
#endif /* not lint */

#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) register x,y; {
register 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);
}