Function paintBridge

src/OpenLoco/src/Paint/PaintBridge.cpp:1189–1417

0x0042AC9C

    // 0x0042AC9C
    bool paintBridge(PaintSession& session)
    {
        session.setItemType(Ui::ViewportInteraction::InteractionItem::bridge);

        auto& bridgeEntry = session.getBridgeEntry();
        if (bridgeEntry.isEmpty())
        {
            return false;
        }

        const auto genHeight = Numerics::ceil2(session.getGeneralSupportHeight().height, 16);
        const auto supportLength = bridgeEntry.height - genHeight;
        if (supportLength < 0)
        {
            return false;
        }

        auto* bridgeObj = ObjectManager::get<BridgeObject>(bridgeEntry.objectId);

        // Height to the base of the bridge platform
        const auto baseHeightOffset = World::Pos3{ 0, 0, bridgeEntry.height };

        if (k4F91DC[bridgeEntry.subType] & (1U << 0))
        {
            const auto& deckImages = k4F91FE[bridgeEntry.subType - 1];
            const auto deckImage = bridgeEntry.imageBase.withIndex(bridgeObj->image).withIndexOffset(deckImages.deck);
            constexpr World::Pos3 bbOffset = { 2, 2, 0 };
            constexpr World::Pos3 bbLength = { 28, 28, 1 };
            session.addToPlotList4FD150(deckImage, baseHeightOffset, bbOffset + baseHeightOffset, bbLength);

            if (k4F91DC[bridgeEntry.subType] & (1U << 2))
            {
                if (!(bridgeEntry.edgesQuarters & (1U << 7)))
                {
                    const auto wallImage = bridgeEntry.imageBase.withIndex(bridgeObj->image).withIndexOffset(deckImages.wallLhs);
                    constexpr World::Pos3 bbOffset2 = { 2, 0, 8 };
                    constexpr World::Pos3 bbLength2 = { 28, 1, 30 };
                    session.addToPlotList4FD150(wallImage, baseHeightOffset, bbOffset2 + baseHeightOffset, bbLength2);
                }
                if (!(bridgeEntry.edgesQuarters & (1U << 5)))
                {
                    const auto wallImage = bridgeEntry.imageBase.withIndex(bridgeObj->image).withIndexOffset(deckImages.wallRhs);
                    constexpr World::Pos3 bbOffset2 = { 1, 30, 8 };
                    constexpr World::Pos3 bbLength2 = { 29, 1, 30 };
                    session.addToPlotList4FD150(wallImage, baseHeightOffset, bbOffset2 + baseHeightOffset, bbLength2);
                }
            }
            if (k4F91DC[bridgeEntry.subType] & (1U << 3))
            {
                if (!(bridgeEntry.edgesQuarters & (1U << 4)))
                {
                    const auto wallImage = bridgeEntry.imageBase.withIndex(bridgeObj->image).withIndexOffset(deckImages.wallLhs);
                    constexpr World::Pos3 bbOffset2 = { 0, 2, 8 };
                    constexpr World::Pos3 bbLength2 = { 1, 28, 30 };
                    session.addToPlotList4FD150(wallImage, baseHeightOffset, bbOffset2 + baseHeightOffset, bbLength2);
                }
                if (!(bridgeEntry.edgesQuarters & (1U << 6)))
                {