v1.4.4
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source/game/StarCelestialDatabase.hpp
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source/game/StarCelestialDatabase.hpp
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#ifndef STAR_CELESTIAL_DATABASE_HPP
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#define STAR_CELESTIAL_DATABASE_HPP
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#include "StarRect.hpp"
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#include "StarTtlCache.hpp"
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#include "StarWeightedPool.hpp"
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#include "StarThread.hpp"
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#include "StarBTreeDatabase.hpp"
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#include "StarCelestialTypes.hpp"
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#include "StarPerlin.hpp"
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namespace Star {
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STAR_CLASS(CelestialDatabase);
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STAR_CLASS(CelestialMasterDatabase);
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STAR_CLASS(CelestialSlaveDatabase);
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class CelestialDatabase {
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public:
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virtual ~CelestialDatabase();
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// The x/y region of usable worlds.
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RectI xyRange() const;
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// The maximum number of bodies that can orbit a single system center /
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// planetary body. Orbital numbers are up to this number of levels
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// *inclusive*, so planetary orbit numbers would be 1-N, and planetary orbit
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// "0", in this system, would refer to the center of the planetary system
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// itself, e.g. a star. In the same way, satellites around a planetary
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// object are numbered 1-N, and 0 refers to the planetary object itself.
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int planetOrbitalLevels() const;
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int satelliteOrbitalLevels() const;
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// The following methods are allowed to return no information even in the
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// case of valid coordinates, due to delayed loading.
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virtual Maybe<CelestialParameters> parameters(CelestialCoordinate const& coordinate) = 0;
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virtual Maybe<String> name(CelestialCoordinate const& coordinate) = 0;
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virtual Maybe<bool> hasChildren(CelestialCoordinate const& coordinate) = 0;
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virtual List<CelestialCoordinate> children(CelestialCoordinate const& coordinate) = 0;
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virtual List<int> childOrbits(CelestialCoordinate const& coordinate) = 0;
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// Return all valid system coordinates in the given x/y range. All systems
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// are guaranteed to have unique x/y coordinates, and are meant to be viewed
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// from the top in 2d. The z-coordinate is there simpy as a validation
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// parameter.
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virtual List<CelestialCoordinate> scanSystems(RectI const& region, Maybe<StringSet> const& includedTypes = {}) = 0;
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virtual List<pair<Vec2I, Vec2I>> scanConstellationLines(RectI const& region) = 0;
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// Returns false if part or all of the specified region is not loaded. This
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// is only relevant for calls to scanSystems and scanConstellationLines, and
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// does not imply that each individual system in the given region is fully
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// loaded with all planets moons etc, only that scanSystem and
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// scanConstellationLines are not waiting on missing data.
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virtual bool scanRegionFullyLoaded(RectI const& region) = 0;
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protected:
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Vec2I chunkIndexFor(CelestialCoordinate const& coordinate) const;
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Vec2I chunkIndexFor(Vec2I const& systemXY) const;
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// Returns the chunk indexes for the given region.
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List<Vec2I> chunkIndexesFor(RectI const& region) const;
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// Returns the region of the given chunk.
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RectI chunkRegion(Vec2I const& chunkIndex) const;
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// m_baseInformation should only be modified in the constructor, as it is not
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// thread protected.
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CelestialBaseInformation m_baseInformation;
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};
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class CelestialMasterDatabase : public CelestialDatabase {
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public:
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CelestialMasterDatabase(Maybe<String> databaseFile = {});
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CelestialBaseInformation baseInformation() const;
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CelestialResponse respondToRequest(CelestialRequest const& requests);
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// Unload data that has not been used in the configured TTL time, and
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// periodically commit to the underlying database if it is in use.
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void cleanupAndCommit();
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// Does this coordinate point to a valid existing object?
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bool coordinateValid(CelestialCoordinate const& coordinate);
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// Find a planetary or satellite object randomly throughout the entire
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// celestial space that satisfies the given parameters. May fail to find
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// anything, though with the defaults this is vanishingly unlikely.
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Maybe<CelestialCoordinate> findRandomWorld(unsigned tries = 10, unsigned trySpatialRange = 50,
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function<bool(CelestialCoordinate)> filter = {}, Maybe<uint64_t> seed = {});
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// CelestialMasterDatabase always returns actual data, as it does just in
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// time generation.
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Maybe<CelestialParameters> parameters(CelestialCoordinate const& coordinate) override;
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Maybe<String> name(CelestialCoordinate const& coordinate) override;
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Maybe<bool> hasChildren(CelestialCoordinate const& coordinate) override;
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List<CelestialCoordinate> children(CelestialCoordinate const& coordinate) override;
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List<int> childOrbits(CelestialCoordinate const& coordinate) override;
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List<CelestialCoordinate> scanSystems(RectI const& region, Maybe<StringSet> const& includedTypes = {}) override;
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List<pair<Vec2I, Vec2I>> scanConstellationLines(RectI const& region) override;
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bool scanRegionFullyLoaded(RectI const& region) override;
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// overwrite the celestial parameters for the world at the given celestial coordinate
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void updateParameters(CelestialCoordinate const& coordinate, CelestialParameters const& parameters);
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protected:
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struct SatelliteType {
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String typeName;
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Json baseParameters;
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JsonArray variationParameters;
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JsonObject orbitParameters;
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};
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struct PlanetaryType {
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String typeName;
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float satelliteProbability;
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size_t maxSatelliteCount;
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Json baseParameters;
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JsonArray variationParameters;
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JsonObject orbitParameters;
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};
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struct SystemType {
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String typeName;
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bool constellationCapable;
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Json baseParameters;
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JsonArray variationParameters;
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List<CelestialOrbitRegion> orbitRegions;
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};
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struct GenerationInformation {
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float systemProbability;
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float constellationProbability;
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Vec2U constellationLineCountRange;
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unsigned constellationMaxTries;
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float maximumConstellationLineLength;
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float minimumConstellationLineLength;
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float minimumConstellationMagnitude;
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float minimumConstellationLineCloseness;
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Map<String, SystemType> systemTypes;
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PerlinD systemTypePerlin;
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Json systemTypeBins;
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StringMap<PlanetaryType> planetaryTypes;
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StringMap<SatelliteType> satelliteTypes;
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StringList planetarySuffixes;
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StringList satelliteSuffixes;
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WeightedPool<String> systemPrefixNames;
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WeightedPool<String> systemNames;
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WeightedPool<String> systemSuffixNames;
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};
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static Maybe<CelestialOrbitRegion> orbitRegion(
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List<CelestialOrbitRegion> const& orbitRegions, int planetaryOrbitNumber);
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CelestialChunk const& getChunk(Vec2I const& chunkLocation);
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CelestialChunk produceChunk(Vec2I const& chunkLocation) const;
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Maybe<pair<CelestialParameters, HashMap<int, CelestialPlanet>>> produceSystem(
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RandomSource& random, Vec3I const& location) const;
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List<CelestialConstellation> produceConstellations(
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RandomSource& random, List<Vec2I> const& constellationCandidates) const;
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GenerationInformation m_generationInformation;
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mutable RecursiveMutex m_mutex;
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HashTtlCache<Vec2I, CelestialChunk> m_chunkCache;
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BTreeSha256Database m_database;
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float m_commitInterval;
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Timer m_commitTimer;
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};
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class CelestialSlaveDatabase : public CelestialDatabase {
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public:
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CelestialSlaveDatabase(CelestialBaseInformation baseInformation);
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// Signal that the given region should be requested from the master database.
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void signalRegion(RectI const& region);
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// Signal that the given system should be fully requested from the master
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// database.
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void signalSystem(CelestialCoordinate const& system);
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// There is an internal activity time for chunk requests to live to prevent
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// repeatedly requesting the same set of chunks.
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List<CelestialRequest> pullRequests();
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void pushResponses(List<CelestialResponse> responses);
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// Unload data that has not been used in the configured TTL time.
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void cleanup();
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Maybe<CelestialParameters> parameters(CelestialCoordinate const& coordinate) override;
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Maybe<String> name(CelestialCoordinate const& coordinate) override;
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Maybe<bool> hasChildren(CelestialCoordinate const& coordinate) override;
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List<CelestialCoordinate> children(CelestialCoordinate const& coordinate) override;
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List<int> childOrbits(CelestialCoordinate const& coordinate) override;
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List<CelestialCoordinate> scanSystems(RectI const& region, Maybe<StringSet> const& includedTypes = {}) override;
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List<pair<Vec2I, Vec2I>> scanConstellationLines(RectI const& region) override;
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bool scanRegionFullyLoaded(RectI const& region) override;
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void invalidateCacheFor(CelestialCoordinate const& coordinate);
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private:
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float m_requestTimeout;
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mutable RecursiveMutex m_mutex;
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HashTtlCache<Vec2I, CelestialChunk> m_chunkCache;
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HashMap<Vec2I, Timer> m_pendingChunkRequests;
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HashMap<Vec3I, Timer> m_pendingSystemRequests;
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};
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}
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#endif
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