Function findOccupationByBlock

src/OpenLoco/src/Vehicles/Routing.cpp:426–473

0x004A2AF0 Passes occupied state via _routingTransformData Returns true for signal block end

    // Passes occupied state via _routingTransformData
    // Returns true for signal block end
    static bool findOccupationByBlock(const LocationOfInterest& interest, uint16_t& routingTransformData)
    {
        auto nextLoc = interest.loc;
        const auto tad = interest.tad();
        auto& trackSize = World::TrackData::getUnkTrack(tad._data);
        nextLoc += trackSize.pos;
        if (trackSize.rotationEnd < 12)
        {
            nextLoc -= World::Pos3{ World::kRotationOffset[trackSize.rotationEnd], 0 };
        }

        auto backwardTaD = tad;
        backwardTaD.setReversed(!backwardTaD.isReversed());
        const auto startLoc = tad.isReversed() ? nextLoc : interest.loc;

        for (const auto& trackPiece : TrackData::getTrackPiece(tad.id()))
        {
            const auto rotPos = Math::Vector::rotate(Pos2{ trackPiece.x, trackPiece.y }, tad.cardinalDirection());
            const auto trackLoc = Pos2{ startLoc } + rotPos;

            for (auto* entity : EntityManager::EntityTileList(trackLoc))
            {
                auto* vehicle = entity->asBase<Vehicles::VehicleBase>();
                if (vehicle == nullptr)
                {
                    continue;
                }

                if (vehicle->has38Flags(Vehicles::Flags38::unk_0 | Vehicles::Flags38::unk_2))
                {
                    continue;
                }

                if (vehicle->getTrackLoc() == interest.loc && vehicle->getTrackAndDirection().track == tad)
                {
                    routingTransformData = 1;
                    break;
                }

                if (vehicle->getTrackLoc() == nextLoc && vehicle->getTrackAndDirection().track == backwardTaD)
                {
                    routingTransformData = 1;
                    break;
                }
            }
        }
        return interest.trackAndDirection & World::Track::AdditionalTaDFlags::hasSignal;
    }

    // 0x004A2CE7
    static void setSignalsOccupiedState(const RoutingResults& results, const uint16_t& routingTransformData)