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Feature: [NewGRF] Related Act2 objects for airports and airport tiles.

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Airports are similar two stations and industries, both of which have the town as related object.
Airport tiles are similar to industry tiles, which have the industry as related object.
This seems a sensible structure, so let's make it Airport Tile -> Airport -> Town.
This commit is contained in:
Michael Lutz
2023-09-10 17:28:53 +02:00
parent a6f2f3c042
commit 1c620b349f
4 changed files with 36 additions and 1 deletions
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21
src/newgrf_airport.cpp
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@@ -14,6 +14,7 @@
#include "newgrf_text.h"
#include "station_base.h"
#include "newgrf_class_func.h"
#include "town.h"
#include "safeguards.h"
@@ -210,6 +211,26 @@ uint32_t AirportResolverObject::GetDebugID() const
this->st->airport.psa->StoreValue(pos, value);
}
/**
* Get the town scope associated with a station, if it exists.
* On the first call, the town scope is created (if possible).
* @return Town scope, if available.
*/
TownScopeResolver *AirportResolverObject::GetTown()
{
if (!this->town_scope) {
Town *t = nullptr;
if (this->airport_scope.st != nullptr) {
t = this->airport_scope.st->town;
} else if (this->airport_scope.tile != INVALID_TILE) {
t = ClosestTownFromTile(this->airport_scope.tile, UINT_MAX);
}
if (t == nullptr) return nullptr;
this->town_scope.reset(new TownScopeResolver(*this, t, this->airport_scope.st == nullptr));
}
return this->town_scope.get();
}
/**
* Constructor of the airport resolver.
* @param tile %Tile for the callback, only valid for airporttile callbacks.