Method GetVariable

src/newgrf_industries.cpp:165–428

virtual */

}

/* virtual */ uint32_t IndustriesScopeResolver::GetVariable(uint8_t variable, [[maybe_unused]] uint32_t parameter, bool &available) const
{
	if (this->ro.callback == CBID_INDUSTRY_LOCATION) {
		/* Variables available during construction check. */

		switch (variable) {
			case 0x7A: return GetBadgeVariableResult(*this->ro.grffile, GetIndustrySpec(this->type)->badges, parameter);

			case 0x80: return this->tile.base();
			case 0x81: return GB(this->tile.base(), 8, 8);

			/* Pointer to the town the industry is associated with */
			case 0x82: return this->industry->town->index.base();
			case 0x83:
			case 0x84:
			case 0x85: Debug(grf, 0, "NewGRFs shouldn't be doing pointer magic"); break; // not supported

			/* Number of the layout */
			case 0x86: return this->industry->selected_layout;

			/* Ground type */
			case 0x87: return GetTerrainType(this->tile);

			/* Town zone */
			case 0x88: return to_underlying(GetTownRadiusGroup(this->industry->town, this->tile));

			/* Manhattan distance of the closest town */
			case 0x89: return ClampTo<uint8_t>(DistanceManhattan(this->industry->town->xy, this->tile));

			/* Lowest height of the tile */
			case 0x8A: return ClampTo<uint8_t>(GetTileZ(this->tile) * (this->ro.grffile->grf_version >= 8 ? 1 : TILE_HEIGHT));

			/* Distance to the nearest water/land tile */
			case 0x8B: return GetClosestWaterDistance(this->tile, !GetIndustrySpec(this->industry->type)->behaviour.Test(IndustryBehaviour::BuiltOnWater));

			/* Square of Euclidean distance from town */
			case 0x8D: return ClampTo<uint16_t>(DistanceSquare(this->industry->town->xy, this->tile));

			/* 32 random bits */
			case 0x8F: return this->random_bits;
		}
	}

	const IndustrySpec *indspec = GetIndustrySpec(this->type);

	if (this->industry == nullptr) {
		Debug(grf, 1, "Unhandled variable 0x{:X} (no available industry) in callback 0x{:x}", variable, this->ro.callback);

		available = false;
		return UINT_MAX;
	}

	switch (variable) {
		case 0x40:
		case 0x41:
		case 0x42: { // waiting cargo, but only if those two callback flags are set
			IndustryCallbackMasks callback = indspec->callback_mask;
			if (callback.Any({IndustryCallbackMask::ProductionCargoArrival, IndustryCallbackMask::Production256Ticks})) {