Function adjustWaterHeight

src/OpenLoco/src/Map/TileManager.cpp:1501–1582

0x004C4C28

    // 0x004C4C28
    uint32_t adjustWaterHeight(World::Pos2 pos, SmallZ targetHeight, World::TileClearance::RemovedBuildings& removedBuildings, uint8_t flags)
    {
        GameCommands::setExpenditureType(ExpenditureType::Construction);
        GameCommands::setPosition(World::Pos3(pos.x + World::kTileSize / 2, pos.y + World::kTileSize / 2, targetHeight * kMicroToSmallZStep));

        if (targetHeight < 4)
        {
            GameCommands::setErrorText(StringIds::error_too_low);
            return GameCommands::kFailure;
        }

        if (targetHeight >= 116)
        {
            GameCommands::setErrorText(StringIds::error_too_high);
            return GameCommands::kFailure;
        }

        currency32_t totalCost = 0;

        if (flags & GameCommands::Flags::apply)
        {
            removeSurfaceIndustry(pos);

            if (!SceneManager::isEditorMode())
            {
                setTerrainStyleAsCleared(pos);
            }

            auto clearHeight = getHeight(pos).landHeight;
            removeAllWallsOnTileAbove(toTileSpace(pos), clearHeight / kSmallZStep);
        }

        auto tile = get(pos);
        auto* surface = tile.surface();

        auto referenceZ = surface->baseZ();
        auto water = surface->water();
        if (water > 0)
        {
            referenceZ = water * kMicroToSmallZStep;
        }

        const auto baseTargetZ = std::min(targetHeight, referenceZ);
        const auto clearTargetZ = std::max(targetHeight, referenceZ);

        // Bind our local vars to the tile clear function
        auto clearFunc = [pos, &removedBuildings, flags, &totalCost](TileElement& el) {
            return TileClearance::clearWithDefaultCollision(el, pos, removedBuildings, flags, totalCost);
        };

        QuarterTile qt(0xF, 0);
        if (!TileClearance::applyClearAtAllHeights(pos, baseTargetZ, clearTargetZ, qt, clearFunc))
        {
            return GameCommands::kFailure;
        }

        if (surface->hasType6Flag())
        {