From 03536a32a189918713ec808bf270d4ad853a7a38 Mon Sep 17 00:00:00 2001
From: tron <tron@openttd.org>
Date: Wed, 8 Mar 2006 08:16:31 +0000
Subject: (svn r3786) More work for DirDiff

---
 train_cmd.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

(limited to 'train_cmd.c')

diff --git a/train_cmd.c b/train_cmd.c
index 960af695a..88e8881d2 100644
--- a/train_cmd.c
+++ b/train_cmd.c
@@ -3015,12 +3015,15 @@ static void DeleteLastWagon(Vehicle *v)
 
 static void ChangeTrainDirRandomly(Vehicle *v)
 {
-	static const int8 _random_dir_change[4] = { -1, 0, 0, 1 };
+	static const DirDiff delta[] = {
+		DIRDIFF_45LEFT, DIRDIFF_SAME, DIRDIFF_SAME, DIRDIFF_45RIGHT
+	};
 
 	do {
 		//I need to buffer the train direction
-		if (!(v->u.rail.track & 0x40))
-			v->direction = (v->direction + _random_dir_change[GB(Random(), 0, 2)]) & 7;
+		if (!(v->u.rail.track & 0x40)) {
+			v->direction = ChangeDir(v->direction, delta[GB(Random(), 0, 2)]);
+		}
 		if (!(v->vehstatus & VS_HIDDEN)) {
 			BeginVehicleMove(v);
 			UpdateTrainDeltaXY(v, v->direction);
-- 
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