Universe addressing, star catalog and deterministic generation.

Interfaces

ArmStrengthOptions BandAmplitudesWhich bands exist, and how much of the relief budget each is allowed.BandSeedsOne derived seed per band, kept on the sketch.BayerName Body BodyAppearance BodyFigureThe measured figure of a body that gravity did not round off.BodyMeasurement CatalogMetadata CatalogPlanetOne confirmed planet, as published.CatalogStar CellContextWhat the catalog contributes to generating one cell.CloudLayer ColorFamily CraterLevelOne lattice of the crater field.Designation DrainageCarveWhat the drainage does to one sample of the field.DrainageGraphThe graph, as the arrays the field and the tests read.DrainageSampleWhat the drainage stage worked out about a sample, handed on to the cover rather than evaluated twice: how much of it is channel bed, how much is the valley's floodplain and margi…FaceCoordinate GalacticCell GalacticCoordinates GalaxyArmReid et al.GalaxyCountIntegral GalaxyCountOptions GalaxyField GalaxyFieldOptions GalaxyRayIntegral GalaxyRayOptions GalaxySample GrammarFactsThe facts a grammar is derived from.HazeFamily HazeLayerThe visible haze above a body, which is not the same thing as its atmosphere.Heightfield HeightfieldRequest Hotspot IdentitySource KernelDrainageThe graph as the kernel reads it, in the layout above; packed once per graph.KernelSurfaceEverything a kernel reads about one body, packed.LinearRgb LiquidAppearanceThe liquid that stands on a body, as it is drawn.MassEstimate PackedCatalog PackedPlanetOne confirmed planet, as published.PackedStarOne star system as the file stores it: measurements and identifiers, nothing derived.PlateContextThe plate work every band shares, done once per sample.PlateSampleThe plates near a direction, and how much farther each is than the nearest.PopulationBox PopulationCellLayoutA reversible permutation places a population in bounded spatial strata.PopulationCellPlanDeterministic per-population counts and addressing layout for one level-owned cell.PopulationCoverage PopulationSkyOptions PopulationSkySelection PopulationSystemRef ProceduralSystemRef RayCraterA named young crater: the ones whose rays are visible from orbit.RegionAddressA cube-sphere surface region: which face, how deep the subdivision, and where on that face's grid.ResolvedPopulationSelection RingSystem RiverNodesThe largest river's mouth, its source, and its largest confluence (−1 where none).ScatterRockOne rock.SkySelectionHow a sky asset chose its stars.SolarAtmosphere SolarBody SolarClouds SolarHazeThe haze you can see, with its published colors.SolarRings SpectralType Stage StageContextWhat a gate reads: the fields of the body both evaluations have in hand.Star StarCatalog StarExtinction StarExtinctionOptions StarPhysicalEverything about a star that does not follow from anything else.StarSystem StripeAxisA great-circle trough: the pole of the circle, and how deep it cuts.SurfaceAssetDefinitionPhysical dimensions of reusable scenery; the host chooses its artwork.SurfaceCoverWhat the ground at a direction is made of.SurfaceGrammar SurfaceParametersTerrain generation parameters.SurfacePlacementAuthored state only.SurveySite SystemStub TectonicPlate TerrainSketch WorldMatchOne body a query matched, with everything a listing needs to draw it.WorldQueryWhat a search is looking for.

Types

BodyFixedDirectionA unit direction from a body's center, expressed in that body's rotating axes.BodyKind BodyProvenanceWhere a body's description came from, and therefore what may be claimed about it.ChordFormHow the distance from a sample to a crater's center is computed.DesignationKindWhich catalog or convention a name comes from.DiscoveryMethod EntityIdRuntime identity of a simulated thing.GalaxyId GalaxyPopulation GalaxyRaySampling LiquidKindThe three liquids a surface can hold, by the temperature the ground is at.LuminosityClassYerkes luminosity classes.MetersSI base and derived units.PackedGateThe packed slot the kernel gates on: the stage runs where the slot is above the threshold.PartitionKey PopulationDensities Provenance ReliefSourceWhich of the three limits reliefLimit returned, or the archive.ScatterKindWhat kind of thing is lying there.SpectralClassSpectral classes, hot to cool, then the ones that are not on that sequence.StageIdThe stages, in the order both evaluations apply them.StageKindHow a stage combines into the running elevation.SupportFeature SurfaceArchetype SurveySiteId SystemId TextureMap UniverseAddress

Functions

addressEquals addressLabels addressOfEntity archetypeName armRadius armStrength armTangencies bareGround bayerName bedShape beltBand biotaWindow blackbodyColor blackbodyXyz bodyAddress bodyFixedDirection bodyFixedFrameId bodyFrameId bodyOfFrameId bolometricCorrection bulkDensity calibrateGalaxy canonicalSystemId carveDrainage catalogStub cellCenter cellContext cellKey cellOf cellOrigin cellsWithin channelDepth channelHalfWidth classifySurface coastRemap coastWidth constellationGenitive convergence coveredPopulationStar craterCountAbove craterDepth craterField craterFieldWithin craterLadder createGalaxyField createPopulationGenerator datumRadius decodeCatalog designationsOf directionToFace directionToGeodetic drainageBuilds drainageCell drainageDatum drainageGraph drainageLookup drains drawnDivergence drawnElevation drawnGroundElevation drawnSurfaceRadius dynamicEntityId earthMasses effectiveTemperature elevationAt encodeCatalog entityIdForAddress equatorialToGalactic equilibriumTemperature estimateMass faceRaw faceToDirection findBody findSurveySite findWorlds flamsteedName formatAddress formatPartition formatSpectralType frostLine galacticToCartesian galaxyAddress galaxyDisplayRgb galaxyDustModulation galaxyDustOctaveMean galaxyDustOctaveWeight galaxyDustProfile galaxyFaceOnLuminosity galaxyId galaxySeedOf galaxySkyDirections galaxyVMagnitude galaxyWarp galaxyYoungHeight generateCell generateHeightfield generateSystem geodeticDirection glieseName gritCycles gritRelief groundCoverAt groundElevation habitableZone hasSolidSurface hazeFor heightfieldSample heightfieldStride heliocentricToUniverse hydrostaticSpinFloor hypsometryBand iceBand initialStructures insolation installSurfaceFrame installSystemFrames integrateGalaxyCount integrateGalaxyRay integrateStarExtinction irregularFigure isDebris isDynamicEntity isEmptyQuery isGiant isHabitable isLandable isMappedSurface isPlanetKind isScoopable isSystemId isUnstableId isWhiteDwarf ladderField ladderIndex largestLake largestRiver levelForSize liquidAppearance liquidKind liquidWindow loadCatalog localBubbleFactor localCloudExtinction luminosityFromAbsoluteMagnitude magmaWindow mainSequenceMass mainSequenceProperties matchesBody matchesStar matchSystem meanDensity meanRadiusOf microCraterDensity microLadder microRelief microReliefBound momentOfInertiaFactor NO_CARVE normalizeGliese objectOf octavesFor orbitalOrder packCover packedStageOn parentAddress parentOf parseAddress parsePopulationSystemId parseProceduralSystemId parseSpectralType parseSurfaceFrameId partitionForAddress partitionForFlight partitionForFrames partitionForPosition partitionGalaxyEmission partitionsAdjacent pigmentFor planetCount planetTilt plateAt plateContext plateProperty plateWeight populationApparentMagnitude populationCellOf populationCellOrigin populationCellSize populationCellsWithin populationCoverage populationLimitingLuminosity populationSystemId primaryMoon proceduralCount proceduralSystemId quantizeAngle radiusFromLuminosity rayBrightness rayCraters readCatalog regionAddress regionCenterDirection regionChildren regionDirection regionForDirection regionNeighbor regionOf regionParent regionScatter regionSize reliefBand reliefLimit reliefLimitSource resolveSystem rockRise rotationalFlattening sampleOffset scatterLevel seaDatumElevation searchKey searchKeysFor seedDrainageGraph selectPopulationSky softLimit solarBodyCount solarSystem stageOf stageOn standingWaterIsSampled stellarDensity supportCeiling supportHeightAt surfaceArchetype surfaceAsset surfaceColorFor surfaceCover surfaceCoverAt surfaceDetailFloor surfaceFrameId surfaceGrammar surfaceGravity surfaceKernel surfaceRadius surfaceTemperature surveySites systemAddress systemFrameId systemId systemOf systemOfFrameId systemSeedOf systemsWithin temperatureFromColorIndex temperatureFromSpectralType terrainSketch tidalProxy tidalProxyOf tileSamples uninstallSystemFrames unpackCover unresolvedPopulationFraction valleyShape volcanicBand volumetricMeanRadius walkBodies walkSolarBodies waterLevelAt writeTileFrame yearsOf

Constants

ACTIVE_TIDAL_PROXYWhere eccentricity tides stop being a rounding error, dimensionless.ARC_MARGIN ARC_SHAPEArc cones over a convergent margin: edge · continental · across · cones^power · gain.BAND_STACK BARE_COVERThe ground with nothing on it: bare mature bedrock.BELT_MARGIN BELT_SHAPEThe belts: the ridged field's scale, and how a range reads on each crust under each motion.BIOTA_WINDOWThe window a biosphere needs, in kelvin: liquid water, and not much hotter than the warmest sea anything on Earth has grown in.CANONICAL_AMPLITUDE_FLOORThe amplitude half of the same floor, meters.CANONICAL_DETAIL_FLOORThe shortest ground wavelength the canonical field carries, meters.CATALOG_TABLESThe index tables the packed file's bayer and constellation bytes point at.CELL_SIZEEdge length of a generation cell.CHAOS_SHAPEChaos terrain: block size on the ground, the wall's width, and the gate.COAST_SHAPEThe coast: how wide the shelf and the plain are, and how flat each is.COVER_CHANNELSHow many bytes packCover writes per sample.COVER_SHAPEThe rest of what the four channels are written in, named where each is spent.COVER_WORDSWords of cover the kernel writes per interior sample: COVERCHANNELS bytes, four to a word.CRATER_SHAPEOne crater's profile, as the proportions craterProfile is drawn from.CRUST_STRENGTHThe compressive strength a crust holds a mountain up with, pascals.DISCOVERY_METHODS DRAINAGE_CACHE_LIMITGraphs kept by the string cache.DRAINAGE_CELL_LISTS_AT DRAINAGE_CELL_START_AT DRAINAGE_NEIGHBORS_AT DRAINAGE_NODES_AT DRAINAGE_RECORDSvec4 slots in the drainage records.DRAINAGE_SEGMENT_STRIDEvec4 slots per segment: SEGMENTSTRIDE / 4.DRAINAGE_SEGMENTS_AT DRAINAGE_SHAPEThe numbers the graph is built and read with.DRAINAGE_WORDSWords in the drainage words.DUNE_SHAPEDunes: a ridged field at cycles times the relief's, compressed along x.EJECTA_REACHHow far past its own rim a crater's ejecta reaches, in crater radii.FACE_COUNT FORMAT_VERSIONBumped when the layout changes in a way an older reader would misread.FROST_POINTWhere water ice stops subliming away in vacuum, Kelvin.GALAXY_ABSOLUTE_V_TARGETLicquia et al.GALAXY_ALGORITHM GALAXY_ARMSThe near-3kpc radius and the two quadrant-IV pitches are calibrated within Reid's 1σ intervals to Hou & Han 2014 Table 2's median tangencies.GALAXY_DUSTHeights follow Guo et al.GALAXY_DUST_SETTLED_HEIGHT_FACTOR GALAXY_DUST_SETTLED_STEP_PARSECSSettled rays resolve dust near the plane and widen in the smooth halo.GALAXY_FIELD_ALGORITHM GALAXY_FIELD_VERSIONSThe physical field revision is also an active population generation input.GALAXY_FOOTPRINT_STEP_FRACTIONA live interval is no shorter than this fraction of the pixel's footprint.GALAXY_HEIGHT_PARSECS GALAXY_OBSERVER_MIN_STEP_PARSECS GALAXY_OBSERVER_STEP_GROWTH GALAXY_PHOTOMETRIC_TOLERANCE GALAXY_PHOTOPIC_TO_VGAMBONS region ratios span 1.20–1.40.GALAXY_POPULATIONSMean Johnson V luminosities in solar V units; fitted jointly to the local sky and total light.GALAXY_RADIANCE_FACTORA column in L☉/pc² converted to isotropic Johnson V radiance, nW m⁻² sr⁻¹.GALAXY_RADIUS_PARSECS GALAXY_SOLAR_V_MAGNITUDEWillmer 2018, Johnson V solar absolute magnitude, Vega system.GALAXY_SOLAR_V_WATTS GALAXY_V_LUMINOUS_EFFICACY GALAXY_V_ZERO_RADIANCEMasana et al.GALAXY_YOUNG_HEIGHTNatale et al.GATE_HI GATE_LOWhere the mare gate opens and closes, on a lobe that runs −1.55 to 1.55.GENERATION_VERSIONS GRIT_FRAMES_ATWhere the tail's grit octaves start in a tile's rung frames.GRIT_OCTAVESOctaves of grit: from CANONICALDETAILFLOOR down to GRITFLOOR.GRIT_RELIEFPeak-to-datum relief of the regolith grit, meters, on an airless world.HABITABLE_INSOLATIONThe insolation band this build calls habitable, W/m².HEIGHTFIELD_BORDERRings of samples generated outside the patch's own edge.HEIGHTFIELD_RESOLUTIONVertices per side of a terrain patch.HOTSPOT_STRIDE HOTSPOTS_AT HYDROSTATIC_SPIN_LIMITThe spin, as a fraction of gravity at the equator, that a planet's draw is floored at: q = ω²R³/GM, so this is the shortest day a body of that mass and size is allowed.HYPSOMETRY_MARGINHow wide a margin each band reads a plate property over.HYPSOMETRY_SHAPEThe continental swell: cycles per unit direction, its octave cap, and its share.ICE_ROCK_DENSITYThe density that separates rock from ice, kg/m³.KERNEL_RECORDSvec4 slots in a body's float records.KERNEL_WORDSWords in a body's record, padded to whole uvec4s.LEVEL_DRAW_ATWhere each rung's existence threshold sits in the words, one u32 per rung in walk order, on a uvec4 boundary past WORD.LEVEL_STRIDE LEVELS_AT LOCAL_BUBBLEZucker et al.LOCAL_CLOUDSGalactic-center frame offsets; source coordinates are heliocentric, +Z north.LOCAL_DENSITYStellar number density in the solar neighborhood, stars per cubic meter.LUMINOSITY_BANDSLog-uniform luminosity bins.MAGICIRSC — InertialRef star catalog.MARE_CYCLESCycles per unit of direction space for the mare gate.MARS_PADThe facility every Milky Way game starts with: a surveyed basin in the game's Mars relief, not a named real-world site.MAX_CRATER_LEVELSHow deep the crater ladder is allowed to go.MAX_KERNEL_DRAINAGE_LISTS MAX_KERNEL_DRAINAGE_NODES MAX_KERNEL_HOTSPOTS MAX_KERNEL_LEVELS MAX_KERNEL_PLATES MAX_KERNEL_RAYS MAX_KERNEL_STRIPES MAX_RAY_CRATERSThe most a body carries.MAX_REGION_LEVELThe deepest subdivision an address can carry.MAX_RELIEFThe largest relief measured on any body in the Solar System, meters.MAX_TILE_LEVELThe deepest region level a tile frame is exact at.MICRO_CRATER_CEILINGThe deepest the sub-floor crater band may cut, meters.MICRO_DETAIL_FLOORThe shortest ground wavelength the presentational field carries, meters.MICRO_RUNG_BASEThe rung number the sub-floor ladder starts at.MILKY_WAY MINERAL_CYCLESAnd for the compositional ramp, which varies on the scale of a province.NO_CATALOGNo catalog at all: fill everything, suppress nothing.NO_DRAINAGEA sample on a body with no drainage: dry, and nowhere in particular.NO_INDEXNo constellation, no Bayer letter.NO_KERNEL_WATERThe water level the kernel writes where there is none, and packs for a node under no lake: below any ground, so every comparison against it reads "dry".NO_STANDINGThe standing lane of a reach nothing drowns: below any ground.PARTITION_ENTRY_RADIUSDistance at which a system's partition is considered entered.PHOTOMETRY_ALGORITHMThe measured-to-physical conversion in catalog/photometry.ts.PIGMENTS PLATE_MARGINThe widest margin any band reads a plate property over, radians.PLATE_STRIDE PLATES_AT POPULATION_COVERAGE_REFERENCE POPULATION_LUMINOSITY_WEIGHTS POPULATION_NAMES POSITION_STEP_AUPosition quantization step.PROVENANCEWhere a star's data came from, and therefore what the game may claim about it.RAY_AGECraters older than this have lost their rays to space weathering.RAY_HARMONICSAzimuthal harmonics of the ray pattern, as integer frequencies.RAY_ONSETWhere the filaments begin, in crater radii.RAY_REACHHow far a ray system reaches, in crater radii.RAY_SHAPEHow a ray system is drawn from its harmonics, as rayBrightness spends them: the halo's strength, the filaments', the threshold that carves them and how it climbs with distance, th…RAY_STRIDE RAYS_AT RELIEF_RADIUS_FRACTIONThe most of its own radius a body carries as relief.RELIEF_SHAPEThe relief tail: its scale from roughness, the warp that bends it.RIM_INNERWhere the rim crest sits and how far the raised rim spreads, in crater radii.RIM_OUTER ROUNDING_RADIUSThe radius above which a body is round, and below which it is a rock.SCALARThe scalars, as flat float indices into the head of the records.SCALARS_AT SCATTER_KINDS SCATTER_MIN_RADIUSSmallest and largest rock this places, meters.SCATTER_REGIONHow wide a scatter region is, meters — the ground one r: address covers.SCATTER_SLOTSCandidate slots per region: a 32 by 32 lattice.SEGMENT_STRIDEFloats per segment record: [ax ay az fA] [bx by bz fB] [wA wB hA hB] [standing · · ·], where standing is the level of the lake or sea the reach is drowned by, or NOSTANDING where …SHIELD_SHAPEA hotspot shield: the flank's concavity and how deep the caldera notches it.SKETCH_CACHE_LIMITSketches kept by the string cache.SKY_REGION_REFERENCES SLAB_ATWhere each rung's sphere-intersection limits sit, four words per rung in walk order: floor(cells²) and ceil(cells²), each as a high and a low u32 of a 48-bit integer.SOL SOL_ONLY_CATALOG SOLAR_BOLOMETRIC_MAGNITUDEBolometric magnitude of the Sun, IAU 2015 Resolution B2.SOLAR_PLANETS SOLAR_TEMPERATURE STAR_EXTINCTION_MID_PARSECS STAR_EXTINCTION_MID_SAMPLES STAR_EXTINCTION_NEAR_PARSECS STAR_EXTINCTION_NEAR_SAMPLES STAR_EXTINCTION_PLANE_SCALE_PARSECS STAR_EXTINCTION_PLANE_SLOPE STAR_EXTINCTION_SAMPLES STRIPE_SHAPEA tiger stripe's double ridge, in multiples of its own offset.STRIPE_STRIDE STRIPES_AT SULCI_SHAPESulci: grooves at cycles, compressed stretch-fold along x.SUN_GALACTOCENTRIC_RADIUSDistance from the galactic center to the Sun (Gravity Collaboration, 2019).SUN_HEIGHT_ABOVE_PLANEThe Sun sits slightly north of the galactic mid-plane.SUN_POSITIONThe Sun's own universe position — the origin of every published catalog.SURFACE_ARCHETYPES SURFACE_ASSETS SURVEY_LEVELThe level a site's region is addressed at.SYSTEM_ALGORITHM TERRAIN_ALGORITHM TERRAIN_DETAIL_TOLERANCEHow much of a bump a patch may miss before refining it stops being worth a worker's time, in meters.TEST_CATALOG TEST_CATALOG_WITH_SKYThe five-star volume and the two-star sky, indexed together as a host does.TEST_SKYThe sky asset's shape: no volume, a stated selection, no planets.TEST_VOLUMEThe fixture catalog.TILE_FRAMESRung frames a tile carries: every crater level, then every grit octave.TILE_STRIDEvec4 slots per tile: [face level i j], then per frame [c0] and [f0].UNKNOWN_SPECTRAL_TYPE utf8 WORDThe unsigned words: counts, the lattice seed, one 32-bit lane per band seed, the octave count per band, and one flag.