From 013ac7742311556022304e8b30ca170d48b3a016 Mon Sep 17 00:00:00 2001
From: "B. Watson" <yalhcru@gmail.com>
Date: Thu, 7 May 2015 16:32:32 -0400
Subject: initial commit

---
 hack/hack.track.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 hack/hack.track.c

(limited to 'hack/hack.track.c')

diff --git a/hack/hack.track.c b/hack/hack.track.c
new file mode 100644
index 0000000..76a398a
--- /dev/null
+++ b/hack/hack.track.c
@@ -0,0 +1,49 @@
+/* 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);
+}
-- 
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