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(svn r27809) -Codechange: Improve check in UpdateLevelCrossing

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In UpdateLevelCrossing, checking if a level crossing is reserved is
cheaper than finding trains on it or approaching it, so do it first. (cirdan)
This commit is contained in:
peter1138 2017-03-20 08:04:47 +00:00
parent f3cbe98156
commit 67ab0450dd
1 changed files with 2 additions and 2 deletions
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4
src/train_cmd.cpp
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@ -1700,8 +1700,8 @@ void UpdateLevelCrossing(TileIndex tile, bool sound)
{
assert(IsLevelCrossingTile(tile));
/* train on crossing || train approaching crossing || reserved */
bool new_state = HasVehicleOnPos(tile, NULL, &TrainOnTileEnum) || TrainApproachingCrossing(tile) || HasCrossingReservation(tile);
/* reserved || train on crossing || train approaching crossing */
bool new_state = HasCrossingReservation(tile) || HasVehicleOnPos(tile, NULL, &TrainOnTileEnum) || TrainApproachingCrossing(tile);
if (new_state != IsCrossingBarred(tile)) {
if (new_state && sound) {