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Fix #12497: Add workaround for motion_counter being implemented correctly. 

#12229 stopped updating motion_counter for non-engine parts of trains, and in doing so accidentally followed the spec for NewGRF var 46, which breaks NewGRFs that used to... accidentally work.

Make var 46 return motion_counter of the first engine, regardless of self or parent scope. This means var 46 is always in sync with the head engine, and avoids further changes to when motion_counter is updated.
pull/12498/head
Peter Nelson 2024-04-14 23:39:25 +01:00
parent 29e932e087
commit 9539b02455
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1 changed files with 1 additions and 1 deletions
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src/newgrf_engine.cpp
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@ -537,7 +537,7 @@ static uint32_t VehicleGetVariable(Vehicle *v, const VehicleScopeResolver *objec
} }
case 0x46: // Motion counter case 0x46: // Motion counter
return v->motion_counter; return v->First()->motion_counter;
case 0x47: { // Vehicle cargo info case 0x47: { // Vehicle cargo info
/* Format: ccccwwtt /* Format: ccccwwtt