Function paintSupport

src/OpenLoco/src/Paint/PaintRoad.cpp:240–259

    namespace AdditionStyle1
    {
        static void paintSupport(PaintSession& session, const RoadAdditionSupport& tppaSupport, const uint8_t rotation, const ImageId baseImageId, int16_t height)
        {
            TrackRoadAdditionSupports support{};
            support.height = height + tppaSupport.height;
            support.occupiedSegments = session.getOccupiedAdditionSupportSegments();
            uint8_t i = 0;
            auto segments = enumValue(tppaSupport.segments[rotation]);
            for (auto seg = Numerics::bitScanForward(segments); seg != -1; seg = Numerics::bitScanForward(segments))
            {
                segments &= ~(1U << seg);
                assert(i < 2);

                support.segmentFrequency[seg] = tppaSupport.frequencies[rotation];
                support.segmentImages[seg] = baseImageId.withIndexOffset(tppaSupport.imageIds[rotation][i * 2]).toUInt32();
                support.segmentInteractionItem[seg] = session.getCurrentItem();
                support.segmentInteractionType[seg] = session.getItemType();
                i++;
            }
            session.setAdditionSupport(support);
        }

        static void paintRoadAdditionPPMergeable(PaintSession& session, const World::RoadElement& elRoad, const uint8_t rotation, const ImageId baseImageId, const RoadPaintAdditionPiece& tppa)
        {