172 lines
3.2 KiB
C++
172 lines
3.2 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 "ChunkGenerator.h"
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#include "../Noise.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(EMCSBiome a_Biome) : m_Biome(a_Biome) {}
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protected:
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EMCSBiome m_Biome;
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// cBiomeGen override:
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virtual void GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap) 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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public:
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cBioGenCache(cBiomeGen * a_BioGenToCache, int a_CacheSize); // Takes ownership of a_BioGenToCache
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~cBioGenCache();
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protected:
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cBiomeGen * 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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int m_CacheSize;
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int * 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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int m_NumHits;
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int m_NumMisses;
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int 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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} ;
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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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protected:
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cBiomeGenList(const AString & a_Biomes)
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{
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InitializeBiomes(a_Biomes);
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}
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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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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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public:
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cBioGenCheckerboard(int a_BiomeSize, const AString & a_Biomes) :
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cBiomeGenList(a_Biomes),
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m_BiomeSize((a_BiomeSize < 8) ? 8 : a_BiomeSize)
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{
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}
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protected:
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int m_BiomeSize;
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// cBiomeGen override:
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virtual void GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap) 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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public:
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cBioGenVoronoi(int a_Seed, int a_CellSize, const AString & a_Biomes) :
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cBiomeGenList(a_Biomes),
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m_CellSize((a_CellSize > 4) ? a_CellSize : 4),
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m_Noise(a_Seed)
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{
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}
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protected:
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int m_CellSize;
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cNoise m_Noise;
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// cBiomeGen override:
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virtual void GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap) 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 cBioGenVoronoi
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{
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public:
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cBioGenDistortedVoronoi(int a_Seed, int a_CellSize, const AString & a_Biomes) :
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cBioGenVoronoi(a_Seed, a_CellSize, a_Biomes)
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{
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}
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protected:
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// cBiomeGen override:
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virtual void GenBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap) 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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