Method generate

src/OpenLoco/src/Map/MapGenerator/SimplexTerrainGenerator.cpp:8–52

namespace OpenLoco::World::MapGenerator
{
    void SimplexTerrainGenerator::generate(const Scenario::Options& options, HeightMapRange heightMap, uint32_t seed)
    {
        initialiseRng(seed);

        auto hillDensity = std::clamp<uint8_t>(options.hillDensity, 0, 100) / 100.0f;
        auto smoothingPasses = std::clamp<uint8_t>(options.numTerrainSmoothingPasses, 1, 5);

        SimplexSettings settings;
        settings.low = options.minLandHeight;
        settings.smooth = smoothingPasses;

        switch (options.topographyStyle)
        {
            case Scenario::TopographyStyle::flatLand:
                settings.high = options.minLandHeight + 8;
                settings.baseFreq = 4.0f * hillDensity;
                settings.octaves = 5;
                generate(settings, heightMap);
                break;
            case Scenario::TopographyStyle::smallHills:
                settings.high = options.minLandHeight + 14;
                settings.baseFreq = 6.0f * hillDensity;
                settings.octaves = 6;
                generate(settings, heightMap);
                break;
            case Scenario::TopographyStyle::mountains:
                settings.high = 32;
                settings.baseFreq = 4.0f * hillDensity;
                settings.octaves = 6;
                generate(settings, heightMap);
                break;
            case Scenario::TopographyStyle::halfMountainsHills:
                settings.high = 32;
                settings.baseFreq = 8.0f * hillDensity;
                settings.octaves = 6;
                generate(settings, heightMap);
                break;
            case Scenario::TopographyStyle::halfMountainsFlat:
                settings.high = 32;
                settings.baseFreq = 6.0f * hillDensity;
                settings.octaves = 5;
                generate(settings, heightMap);
                break;
        }
    }

    void SimplexTerrainGenerator::initialiseRng(uint32_t seed)
    {