Function updateSurface

src/OpenLoco/src/Map/SurfaceElement.cpp:274–322

0x004691FA

    // 0x004691FA
    bool updateSurface(SurfaceElement& elSurface, const World::Pos2 loc)
    {
        bool elSurfaceValid = true;
        if (elSurface.isIndustrial())
        {
            elSurfaceValid = !updateIndustrialSurface(elSurface, loc);
        }
        else
        {
            updateNonIndustrialSurface(elSurface, loc);
        }

        auto* surf = elSurfaceValid ? &elSurface : TileManager::get(loc).surface();

        const MicroZ snow = Scenario::getCurrentSnowLine() / kMicroToSmallZStep;
        uint8_t targetCoverage = std::clamp(((surf->baseZ() / kMicroToSmallZStep) + 1) - snow, 0, 5);
        if (surf->snowCoverage() != targetCoverage)
        {
            if (surf->snowCoverage() > targetCoverage)
            {
                surf->setSnowCoverage(surf->snowCoverage() - 1);
            }
            else
            {
                surf->setSnowCoverage(surf->snowCoverage() + 1);
            }
            Ui::ViewportManager::invalidate(loc, surf->baseHeight(), surf->baseHeight());
        }

        if (!surf->water())
        {
            return elSurfaceValid;
        }
        if (surf->hasType6Flag())
        {
            surf->setVariation(surf->variation() + 1);
            if (surf->variation() >= 64)
            {
                surf->setVariation(0);
                surf->setType6Flag(false);
            }
        }
        if (surf->isFlag6())
        {
            return elSurfaceValid;
        }
        WaveManager::createWave(*surf, loc);
        return elSurfaceValid;
    }
}