Function setSignalState

src/OpenLoco/src/Vehicles/Routing.cpp:310–421

0x0048963F

    // 0x0048963F
    void setSignalState(const World::Pos3& loc, const TrackAndDirection::_TrackAndDirection trackAndDirection, const uint8_t trackType, uint32_t flags)
    {
        const auto unk1 = flags & 0xFFFF;
        assert(unk1 != 10); // Only happens if wrong function was called call getSignalState
        auto trackStart = loc;
        if (trackAndDirection.isReversed())
        {
            auto& trackSize = World::TrackData::getUnkTrack(trackAndDirection._data);
            trackStart += trackSize.pos;
            if (trackSize.rotationEnd < 12)
            {
                trackStart -= World::Pos3{ World::kRotationOffset[trackSize.rotationEnd], 0 };
            }
            flags ^= (1ULL << 31);
        }

        auto& trackPieces = World::TrackData::getTrackPiece(trackAndDirection.id());
        for (auto& trackPiece : trackPieces)
        {
            auto signalLoc = trackStart + World::Pos3{ Math::Vector::rotate(World::Pos2{ trackPiece.x, trackPiece.y }, trackAndDirection.cardinalDirection()), 0 };
            signalLoc.z += trackPiece.z;
            auto res = findSignalOnTrack(signalLoc, trackAndDirection, trackType, trackPiece.index);

            if (!res)
            {
                // This shouldn't happen I think. Either way useful in debug to know.
                assert(false);
                return;
            }

            auto [elSignal, foundTrack] = *res;

            // edx
            auto& signalSide = (flags & (1ULL << 31)) ? elSignal->getRight() : elSignal->getLeft();
            if (unk1 == 16)
            {
                uint8_t lightStates = 0;
                if (flags & (1ULL << 30))
                {
                    lightStates |= 1 << 2;
                    if (flags & (1ULL << 28))
                    {
                        lightStates |= 1 << 0;
                    }
                }
                if (flags & (1ULL << 29))
                {
                    lightStates |= 1 << 3;
                    if (flags & (1ULL << 27))
                    {
                        lightStates |= 1 << 1;
                    }
                }

                if (signalSide.allLights() != lightStates)
                {
                    bool shouldInvalidate = false;
                    signalSide.setAllLights(lightStates);