From 2181a72e9ee5db7aa568dd25172e1355e76b4f45 Mon Sep 17 00:00:00 2001
From: tron <tron@openttd.org>
Date: Wed, 8 Mar 2006 08:28:48 +0000
Subject: [PATCH] (svn r3787) Use DirToDiagDir() instead of >> 1

---
 disaster_cmd.c | 2 +-
 roadveh_cmd.c  | 2 +-
 station_cmd.c  | 2 +-
 train_cmd.c    | 2 +-
 vehicle.c      | 4 ++--
 5 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/disaster_cmd.c b/disaster_cmd.c
index d053ff1997..06d856a87a 100644
--- a/disaster_cmd.c
+++ b/disaster_cmd.c
@@ -656,7 +656,7 @@ static void DisasterTick_5_and_6(Vehicle *v)
 	if (!(v->tick_counter&1))
 		return;
 
-	tile = v->tile + TileOffsByDir(v->direction >> 1);
+	tile = v->tile + TileOffsByDir(DirToDiagDir(v->direction));
 	if (IsValidTile(tile) &&
 			(r=GetTileTrackStatus(tile,TRANSPORT_WATER),(byte)(r+(r >> 8)) == 0x3F) &&
 			!CHANCE16(1,90)) {
diff --git a/roadveh_cmd.c b/roadveh_cmd.c
index 6c3d27d693..b941f2e249 100644
--- a/roadveh_cmd.c
+++ b/roadveh_cmd.c
@@ -918,7 +918,7 @@ static void RoadVehCheckOvertake(Vehicle *v, Vehicle *u)
 	od.tile = v->tile;
 	if (FindRoadVehToOvertake(&od)) return;
 
-	od.tile = v->tile + TileOffsByDir(v->direction >> 1);
+	od.tile = v->tile + TileOffsByDir(DirToDiagDir(v->direction));
 	if (FindRoadVehToOvertake(&od)) return;
 
 	if (od.u->cur_speed == 0 || od.u->vehstatus&VS_STOPPED) {
diff --git a/station_cmd.c b/station_cmd.c
index 90601855a6..b406571919 100644
--- a/station_cmd.c
+++ b/station_cmd.c
@@ -2177,7 +2177,7 @@ static uint32 VehicleEnter_Station(Vehicle *v, TileIndex tile, int x, int y)
 {
 	if (v->type == VEH_Train) {
 		if (IS_BYTE_INSIDE(_m[tile].m5, 0, 8) && IsFrontEngine(v) &&
-				!IsCompatibleTrainStationTile(tile + TileOffsByDir(v->direction >> 1), tile)) {
+				!IsCompatibleTrainStationTile(tile + TileOffsByDir(DirToDiagDir(v->direction)), tile)) {
 			StationID station_id = _m[tile].m2;
 
 			if ((!(v->current_order.flags & OF_NON_STOP) && !_patches.new_nonstop) ||
diff --git a/train_cmd.c b/train_cmd.c
index 88e8881d23..cb08e52b1b 100644
--- a/train_cmd.c
+++ b/train_cmd.c
@@ -2172,7 +2172,7 @@ static bool CheckReverseTrain(Vehicle *v)
 
 	assert(v->u.rail.track);
 
-	i = _search_directions[FIND_FIRST_BIT(v->u.rail.track)][v->direction>>1];
+	i = _search_directions[FIND_FIRST_BIT(v->u.rail.track)][DirToDiagDir(v->direction)];
 
 	if (_patches.new_pathfinding_all) { /* Use a new pathfinding for everything */
 		NPFFindStationOrTileData fstd;
diff --git a/vehicle.c b/vehicle.c
index 24d7b731f6..6fddacc61f 100644
--- a/vehicle.c
+++ b/vehicle.c
@@ -1960,7 +1960,7 @@ Trackdir GetVehicleTrackdir(const Vehicle* v)
 				return DiagdirToDiagTrackdir(GetDepotDirection(v->tile, TRANSPORT_RAIL)); /* Train in depot */
 
 			if (v->u.rail.track == 0x40) /* train in tunnel, so just use his direction and assume a diagonal track */
-				return DiagdirToDiagTrackdir((v->direction >> 1) & 3);
+				return DiagdirToDiagTrackdir(DirToDiagDir(v->direction));
 
 			return TrackDirectionToTrackdir(FIND_FIRST_BIT(v->u.rail.track),v->direction);
 
@@ -1978,7 +1978,7 @@ Trackdir GetVehicleTrackdir(const Vehicle* v)
 			if (IsRoadStationTile(v->tile)) /* We'll assume the road vehicle is facing outwards */
 				return DiagdirToDiagTrackdir(GetRoadStationDir(v->tile)); /* Road vehicle in a station */
 
-			return DiagdirToDiagTrackdir((v->direction >> 1) & 3);
+			return DiagdirToDiagTrackdir(DirToDiagDir(v->direction));
 
 		/* case VEH_Aircraft: case VEH_Special: case VEH_Disaster: */
 		default: return 0xFF;