Mercurial > hg > openttd
changeset 4812:f520062e491e draft
(svn r6736) - Add a function to get the list position of an engine ID, for use with sorting. This is basically a reversed version of GetRailVehAtPosition()
| author | peter1138 <peter1138@openttd.org> |
|---|---|
| date | Wed, 11 Oct 2006 18:35:40 +0000 |
| parents | 04822ed462c7 |
| children | 1cdd00fcc76c |
| files | newgrf_engine.c newgrf_engine.h |
| diffstat | 2 files changed, 28 insertions(+), 1 deletions(-) [+] |
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--- a/newgrf_engine.c +++ b/newgrf_engine.c @@ -1124,6 +1124,7 @@ // Functions for changing the order of vehicle purchase lists // This is currently only implemented for rail vehicles. static EngineID _engine_list_order[NUM_TRAIN_ENGINES]; +static byte _engine_list_position[NUM_TRAIN_ENGINES]; void ResetEngineListOrder(void) { @@ -1131,12 +1132,32 @@ for (i = 0; i < NUM_TRAIN_ENGINES; i++) { _engine_list_order[i] = i; + _engine_list_position[i] = i; } } +/** + * Get the EngineID at position pos. + * Used when drawing a(n unsorted) list of engines. + * @param pos List position/ + * @return The EngineID at the requested position. + */ EngineID GetRailVehAtPosition(EngineID pos) { - return _engine_list_order[pos]; + if (pos < NUM_TRAIN_ENGINES) return _engine_list_order[pos]; + return pos; +} + +/** + * Get the list position of an engine. + * Used when sorting a list of engines. + * @param engine ID of the engine. + * @return The list position of the engine. + */ +uint16 ListPositionOfEngine(EngineID engine) +{ + if (engine < NUM_TRAIN_ENGINES) return _engine_list_position[engine]; + return engine; } void AlterRailVehListOrder(EngineID engine, EngineID target) @@ -1160,4 +1181,9 @@ break; } } + + // Update the engine list position (a reverse of engine list order) + for (i = 0; i < NUM_TRAIN_ENGINES; i++) { + _engine_list_position[_engine_list_order[i]] = i; + } }