7c0a7d662d
git-svn-id: http://mc-server.googlecode.com/svn/trunk@1200 0a769ca7-a7f5-676a-18bf-c427514a06d6
114 lines
3.4 KiB
C++
114 lines
3.4 KiB
C++
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// ChunkGenerator.h
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// Interfaces to the cChunkGenerator class representing the thread that generates chunks
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/*
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The object takes requests for generating chunks and processes them in a separate thread one by one.
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The requests are not added to the queue if there is already a request with the same coords
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Before generating, the thread checks if the chunk hasn't been already generated.
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It is theoretically possible to have multiple generator threads by having multiple instances of this object,
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but then it MAY happen that the chunk is generated twice.
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If the generator queue is overloaded, the generator skips chunks with no clients in them
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*/
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#pragma once
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#include "../OSSupport/IsThread.h"
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#include "../ChunkDef.h"
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// fwd:
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class cWorld;
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class cIniFile;
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class cChunkDesc;
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class cChunkGenerator :
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cIsThread
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{
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typedef cIsThread super;
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public:
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/// The interface that a class has to implement to become a generator
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class cGenerator
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{
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public:
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cGenerator(cChunkGenerator & a_ChunkGenerator);
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virtual ~cGenerator() {} ; // Force a virtual destructor
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/// Called to initialize the generator on server startup.
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virtual void Initialize(cWorld * a_World, cIniFile & a_IniFile);
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/// Generates the biomes for the specified chunk (directly, not in a separate thread). Used by the world loader if biomes failed loading.
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virtual void GenerateBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap) = 0;
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/// Returns the biome at the specified coords. Used by ChunkMap if an invalid chunk is queried for biome. Default implementation uses GenerateBiomes().
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virtual EMCSBiome GetBiomeAt(int a_BlockX, int a_BlockZ);
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/// Called in a separate thread to do the actual chunk generation. Generator should generate into a_ChunkDesc.
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virtual void DoGenerate(int a_ChunkX, int a_ChunkZ, cChunkDesc & a_ChunkDesc) = 0;
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protected:
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cChunkGenerator & m_ChunkGenerator;
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cWorld * m_World;
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} ;
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cChunkGenerator (void);
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~cChunkGenerator();
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bool Start(cWorld * a_World, cIniFile & a_IniFile);
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void Stop(void);
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/// Queues the chunk for generation; removes duplicate requests
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void QueueGenerateChunk(int a_ChunkX, int a_ChunkY, int a_ChunkZ);
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/// Generates the biomes for the specified chunk (directly, not in a separate thread). Used by the world loader if biomes failed loading.
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void GenerateBiomes(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_BiomeMap);
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void WaitForQueueEmpty(void);
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int GetQueueLength(void);
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int GetSeed(void) const { return m_Seed; }
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/// Returns the biome at the specified coords. Used by ChunkMap if an invalid chunk is queried for biome
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EMCSBiome GetBiomeAt(int a_BlockX, int a_BlockZ);
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/// Reads a block type from the ini file; returns the blocktype on success, emits a warning and returns a_Default's representation on failure.
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static BLOCKTYPE GetIniBlock(cIniFile & a_IniFile, const AString & a_SectionName, const AString & a_ValueName, const AString & a_Default);
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private:
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cWorld * m_World;
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int m_Seed;
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cCriticalSection m_CS;
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cChunkCoordsList m_Queue;
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cEvent m_Event; ///< Set when an item is added to the queue or the thread should terminate
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cEvent m_evtRemoved; ///< Set when an item is removed from the queue
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cGenerator * m_Generator; ///< The actual generator engine used to generate chunks
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// cIsThread override:
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virtual void Execute(void) override;
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void DoGenerate(int a_ChunkX, int a_ChunkY, int a_ChunkZ);
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};
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