Function assignRouteColours

src/OpenLoco/src/Ui/Windows/MapWindow.cpp:2322–2403

0x0046CED0

    // 0x0046CED0
    static void assignRouteColours()
    {
        uint32_t availableColours = 0x7FFFFFFF;

        // First, assign water colour
        {
            auto waterObj = ObjectManager::get<WaterObject>();

            auto waterPixel = Gfx::getG1Element(waterObj->mapPixelImage)->offset[0];
            availableColours = checkIndustryColours(waterPixel, availableColours);

            waterPixel = Gfx::getG1Element(waterObj->mapPixelImage)->offset[1];
            availableColours = checkIndustryColours(waterPixel, availableColours);
        }

        // Then, assign surface texture colours
        for (auto i = 0U; i < ObjectManager::getMaxObjects(ObjectType::land); i++)
        {
            auto landObj = ObjectManager::get<LandObject>(i);
            if (landObj == nullptr)
            {
                continue;
            }

            auto landPixel = Gfx::getG1Element(landObj->mapPixelImage)->offset[0];
            availableColours = checkIndustryColours(landPixel, availableColours);

            landPixel = Gfx::getG1Element(landObj->mapPixelImage)->offset[1];
            availableColours = checkIndustryColours(landPixel, availableColours);
        }

        availableColours = checkIndustryColours(PaletteIndex::mutedDarkRed2, availableColours);
        availableColours = checkIndustryColours(PaletteIndex::orange8, availableColours);
        availableColours = checkIndustryColours(PaletteIndex::pink9, availableColours);
        availableColours = checkIndustryColours(PaletteIndex::blue9, availableColours);
        availableColours = checkIndustryColours(PaletteIndex::black0, availableColours);
        availableColours = checkIndustryColours(PaletteIndex::blackB, availableColours);

        auto availableTracks = companyGetAvailableRailTracks(CompanyManager::getControllingId());
        auto availableRoads = companyGetAvailableRoads(CompanyManager::getControllingId());

        auto i = 0U;
        auto assignColour = [&i, &availableColours](uint8_t id) {
            _routeToObjectIdMap[i] = id;
            auto freeColour = std::max(0, Numerics::bitScanForward(availableColours));
            availableColours &= ~(1U << freeColour);

            auto colour = kIndustryColours[freeColour];
            _routeColours[i] = colour;

            if (id & (1U << 7))
            {
                _roadColours[id & ~(1U << 7)] = colour;
            }
            else
            {
                _trackColours[id] = colour;
            }