mirror
/
OpenTTD
mirror of https://github.com/OpenTTD/OpenTTD
1
0
Fork 0
Code Issues

(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()

release/0.5
peter1138 2006-10-11 18:35:40 +00:00
parent 0ad5dbfdb9
commit 8d2bf45123
2 changed files with 28 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
newgrf_engine.c
View File

@ -1124,6 +1124,7 @@ StringID GetCustomEngineName(EngineID engine)
// 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 @@ void ResetEngineListOrder(void)
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 @@ void AlterRailVehListOrder(EngineID engine, EngineID target)
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;
}
}

1
newgrf_engine.h
View File

@ -62,6 +62,7 @@ void UnloadCustomEngineNames(void);
void ResetEngineListOrder(void);
EngineID GetRailVehAtPosition(EngineID pos);
uint16 ListPositionOfEngine(EngineID engine);
void AlterRailVehListOrder(EngineID engine, EngineID target);
#endif /* NEWGRF_ENGINE_H */