317 lines
8.0 KiB
C++
317 lines
8.0 KiB
C++
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// BioGen.h
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/*
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Interfaces to the various biome generators:
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- cBioGenConstant
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- cBioGenCheckerboard
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- cBioGenDistortedVoronoi
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*/
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#pragma once
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#include "ComposableGenerator.h"
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#include "../Noise/Noise.h"
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#include "../VoronoiMap.h"
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class cBioGenConstant :
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public cBiomeGen
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{
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public:
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cBioGenConstant(void) : m_Biome(biPlains) {}
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protected:
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EMCSBiome m_Biome;
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// cBiomeGen overrides:
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virtual void GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap) override;
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virtual void InitializeBiomeGen(cIniFile & a_IniFile) override;
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} ;
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/** A simple cache that stores N most recently generated chunks' biomes; N being settable upon creation */
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class cBioGenCache :
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public cBiomeGen
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{
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typedef cBiomeGen super;
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public:
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cBioGenCache(cBiomeGenPtr a_BioGenToCache, size_t a_CacheSize);
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virtual ~cBioGenCache();
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protected:
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cBiomeGenPtr m_BioGenToCache;
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struct sCacheData
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{
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int m_ChunkX;
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int m_ChunkZ;
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cChunkDef::BiomeMap m_BiomeMap;
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} ;
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// To avoid moving large amounts of data for the MRU behavior, we MRU-ize indices to an array of the actual data
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size_t m_CacheSize;
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size_t * m_CacheOrder; // MRU-ized order, indices into m_CacheData array
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sCacheData * m_CacheData; // m_CacheData[m_CacheOrder[0]] is the most recently used
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// Cache statistics
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size_t m_NumHits;
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size_t m_NumMisses;
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size_t m_TotalChain; // Number of cache items walked to get to a hit (only added for hits)
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virtual void GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap) override;
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virtual void InitializeBiomeGen(cIniFile & a_IniFile) override;
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} ;
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class cBioGenMulticache :
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public cBiomeGen
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{
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typedef cBiomeGen super;
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public:
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/* Creates a new multicache - a cache that divides the caching into several sub-caches based on the chunk coords.
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This allows us to use shorter cache depths with faster lookups for more covered area. (#381)
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a_SubCacheSize defines the size of each sub-cache
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a_NumSubCaches defines how many sub-caches are used for the multicache. */
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cBioGenMulticache(cBiomeGenPtr a_BioGenToCache, size_t a_SubCacheSize, size_t a_NumSubCaches);
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protected:
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typedef std::vector<cBiomeGenPtr> cBiomeGenPtrs;
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/** Number of sub-caches. Pulled out of m_Caches.size() for faster access. */
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size_t m_NumSubCaches;
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/** Individual sub-caches. */
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cBiomeGenPtrs m_Caches;
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virtual void GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap) override;
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virtual void InitializeBiomeGen(cIniFile & a_IniFile) override;
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};
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/** Base class for generators that use a list of available biomes. This class takes care of the list. */
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class cBiomeGenList :
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public cBiomeGen
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{
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typedef cBiomeGen super;
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protected:
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// List of biomes that the generator is allowed to generate:
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typedef std::vector<EMCSBiome> EMCSBiomes;
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EMCSBiomes m_Biomes;
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int m_BiomesCount; // Pulled out of m_Biomes for faster access
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/** Parses the INI file setting string into m_Biomes. */
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void InitializeBiomes(const AString & a_Biomes);
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} ;
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class cBioGenCheckerboard :
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public cBiomeGenList
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{
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typedef cBiomeGenList super;
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protected:
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int m_BiomeSize;
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// cBiomeGen overrides:
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virtual void GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap) override;
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virtual void InitializeBiomeGen(cIniFile & a_IniFile) override;
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} ;
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class cBioGenVoronoi :
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public cBiomeGenList
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{
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typedef cBiomeGenList super;
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public:
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cBioGenVoronoi(int a_Seed) :
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m_Voronoi(a_Seed)
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{
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}
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protected:
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cVoronoiMap m_Voronoi;
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// cBiomeGen overrides:
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virtual void GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap) override;
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virtual void InitializeBiomeGen(cIniFile & a_IniFile) override;
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EMCSBiome VoronoiBiome(int a_BlockX, int a_BlockZ);
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} ;
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class cBioGenDistortedVoronoi :
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public cBiomeGenList
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{
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typedef cBiomeGenList super;
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public:
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cBioGenDistortedVoronoi(int a_Seed) :
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m_Noise(a_Seed),
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m_Voronoi(a_Seed),
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m_CellSize(0)
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{
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}
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protected:
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/** Noise used for the distortion */
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cNoise m_Noise;
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/** The underlying Voronoi map of the biomes */
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cVoronoiMap m_Voronoi;
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/** Size of the Voronoi cells, also used for distortion amplitude */
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int m_CellSize;
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// cBiomeGen overrides:
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virtual void GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap) override;
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virtual void InitializeBiomeGen(cIniFile & a_IniFile) override;
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/** Distorts the coords using a Perlin-like noise */
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void Distort(int a_BlockX, int a_BlockZ, int & a_DistortedX, int & a_DistortedZ);
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} ;
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class cBioGenMultiStepMap :
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public cBiomeGen
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{
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typedef cBiomeGen super;
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public:
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cBioGenMultiStepMap(int a_Seed);
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protected:
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// Noises used for composing the perlin-noise:
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cNoise m_Noise1;
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cNoise m_Noise2;
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cNoise m_Noise3;
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cNoise m_Noise4;
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cNoise m_Noise5;
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cNoise m_Noise6;
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int m_Seed;
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int m_OceanCellSize;
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int m_MushroomIslandSize;
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int m_RiverCellSize;
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double m_RiverWidthThreshold;
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float m_LandBiomesSize;
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typedef int IntMap[17 * 17]; // x + 17 * z, expected trimmed into [0..255] range
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typedef double DblMap[17 * 17]; // x + 17 * z, expected trimmed into [0..1] range
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// cBiomeGen overrides:
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virtual void GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap) override;
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virtual void InitializeBiomeGen(cIniFile & a_IniFile) override;
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/** Step 1: Decides between ocean, land and mushroom, using a DistVoronoi with special conditions and post-processing for mushroom islands
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Sets biomes to biOcean, -1 (i.e. land), biMushroomIsland or biMushroomShore. */
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void DecideOceanLandMushroom(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap);
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/** Step 2: Add rivers to the land
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Flips some "-1" biomes into biRiver. */
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void AddRivers(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap);
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/** Step 3: Decide land biomes using a temperature / humidity map; freeze ocean / river in low temperatures.
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Flips all remaining "-1" biomes into land biomes. Also flips some biOcean and biRiver into biFrozenOcean, biFrozenRiver, based on temp map. */
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void ApplyTemperatureHumidity(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap);
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/** Distorts the coords using a Perlin-like noise, with a specified cell-size */
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void Distort(int a_BlockX, int a_BlockZ, int & a_DistortedX, int & a_DistortedZ, int a_CellSize);
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/** Builds two Perlin-noise maps, one for temperature, the other for humidity. Trims both into [0..255] range */
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void BuildTemperatureHumidityMaps(int a_ChunkX, int a_ChunkZ, IntMap & a_TemperatureMap, IntMap & a_HumidityMap);
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/** Flips all remaining "-1" biomes into land biomes using the two maps */
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void DecideLandBiomes(cChunkDef::BiomeMap & a_BiomeMap, const IntMap & a_TemperatureMap, const IntMap & a_HumidityMap);
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/** Flips biOcean and biRiver into biFrozenOcean and biFrozenRiver if the temperature is too low */
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void FreezeWaterBiomes(cChunkDef::BiomeMap & a_BiomeMap, const IntMap & a_TemperatureMap);
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} ;
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class cBioGenTwoLevel :
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public cBiomeGen
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{
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typedef cBiomeGen super;
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public:
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cBioGenTwoLevel(int a_Seed);
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protected:
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/** The Voronoi map that decides the groups of biomes */
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cVoronoiMap m_VoronoiLarge;
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/** The Voronoi map that decides biomes inside individual biome groups */
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cVoronoiMap m_VoronoiSmall;
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// The noises used for the distortion:
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cNoise m_Noise1;
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cNoise m_Noise2;
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cNoise m_Noise3;
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cNoise m_Noise4;
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cNoise m_Noise5;
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cNoise m_Noise6;
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// Frequencies and amplitudes for the distortion noises:
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float m_FreqX1, m_AmpX1;
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float m_FreqX2, m_AmpX2;
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float m_FreqX3, m_AmpX3;
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float m_FreqZ1, m_AmpZ1;
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float m_FreqZ2, m_AmpZ2;
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float m_FreqZ3, m_AmpZ3;
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// cBiomeGen overrides:
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virtual void GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap) override;
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virtual void InitializeBiomeGen(cIniFile & a_IniFile) override;
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/** Selects biome from the specified biome group, based on the specified index.
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Note that both params may overflow
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a_DistLevel is either 0 or 1; zero when it is at the edge of the small Voronoi cell, 1 near the center */
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EMCSBiome SelectBiome(int a_BiomeGroup, size_t a_BiomeIdx, int a_DistLevel);
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} ;
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