blob: 76a398a521292d20dd25dd8ccfeb786651fb4fbc (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/* hack.track.c - version 1.0.2 */
/* $FreeBSD: src/games/hack/hack.track.c,v 1.4 1999/11/16 10:26:38 marcel Exp $ */
/* $DragonFly: src/games/hack/hack.track.c,v 1.3 2006/08/21 19:45:32 pavalos Exp $ */
#include "hack.h"
#define UTSZ 50
coord utrack[UTSZ];
int utcnt = 0;
int utpnt = 0;
void
initrack(void)
{
utcnt = utpnt = 0;
}
/* add to track */
void
settrack(void)
{
if (utcnt < UTSZ)
utcnt++;
if (utpnt == UTSZ)
utpnt = 0;
utrack[utpnt].x = u.ux;
utrack[utpnt].y = u.uy;
utpnt++;
}
coord *
gettrack(int x, int y)
{
int i, cnt, dst;
coord tc;
cnt = utcnt;
for (i = utpnt - 1; cnt--; i--) {
if (i == -1)
i = UTSZ - 1;
tc = utrack[i];
dst = (x - tc.x) * (x - tc.x) + (y - tc.y) * (y - tc.y);
if (dst < 3)
return (dst ? &(utrack[i]) : 0);
}
return (0);
}
|
