Function placeTreeCluster

src/OpenLoco/src/Map/Tree.cpp:139–161

0x004BDC67 (when treeType is nullopt) & 0x004BDDC6 (when treeType is set)

    // 0x004BDC67 (when treeType is nullopt) & 0x004BDDC6 (when treeType is set)
    bool placeTreeCluster(const World::TilePos2& centreLoc, const uint16_t range, const uint16_t density, const std::optional<uint8_t> treeType)
    {
        const auto numPlacements = (range * range * density) / 8192;
        uint16_t numErrors = 0;
        for (auto i = 0; i < numPlacements; ++i)
        {
            // Choose a random offset in a circle
            auto& rng = gPrng1();
            auto randomMagnitude = rng.randNext(std::numeric_limits<uint16_t>::max()) * range / 65536;
            auto randomDirection = rng.randNext(Math::Trigonometry::kDirectionPrecisionHigh - 1);
            World::Pos2 randomOffset(
                Math::Trigonometry::integerSinePrecisionHigh(randomDirection, randomMagnitude),
                Math::Trigonometry::integerCosinePrecisionHigh(randomDirection, randomMagnitude));

            if (!placeRandomTree(randomOffset + World::toWorldSpace(centreLoc), treeType))
            {
                numErrors++;
            }
        }

        // Have we placed any trees?
        return (numErrors < numPlacements);
    }
}