Function getQuadrantOrCentreFromPos

src/OpenLoco/src/Map/MapSelection.cpp:220–232

0x0045FD8E NOTE: Original call getSurfaceLocFromUi within this function instead OpenLoco has split it in two. Also note that result of original was a Pos2 start i.e. (& 0xFFE0) both components

    // instead OpenLoco has split it in two. Also note that result of original
    // was a Pos2 start i.e. (& 0xFFE0) both components
    MapSelectionType getQuadrantOrCentreFromPos(const Pos2& loc)
    {
        // Determine to which quadrants the cursor is closest 4 == all quadrants
        const auto xNibbleCentre = std::abs((loc.x & 0xFFE0) + 16 - loc.x);
        const auto yNibbleCentre = std::abs((loc.y & 0xFFE0) + 16 - loc.y);
        if (std::max(xNibbleCentre, yNibbleCentre) <= 7)
        {
            // Is centre so all quadrants
            return MapSelectionType::full;
        }

        return getQuadrantFromPos(loc);
    }

    // 0x0045FE05
    // NOTE: Original call getSurfaceLocFromUi within this function