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cuberite-2a
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Re-worked generator subobject ownership, added a cache for the CompositionGen 

git-svn-id: http://mc-server.googlecode.com/svn/trunk@1447 0a769ca7-a7f5-676a-18bf-c427514a06d6
This commit is contained in:
madmaxoft@gmail.com 2013-05-05 19:56:45 +00:00
parent 6b35c64658
commit e88cdf8da7
10 changed files with 187 additions and 66 deletions
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1
source/Generating/BioGen.cpp
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@ -69,7 +69,6 @@ cBioGenCache::~cBioGenCache()
{
delete[] m_CacheData;
delete[] m_CacheOrder;
delete m_BioGenToCache;
}

2
source/Generating/BioGen.h
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@ -47,7 +47,7 @@ class cBioGenCache :
typedef cBiomeGen super;
public:
cBioGenCache(cBiomeGen * a_BioGenToCache, int a_CacheSize); // Takes ownership of a_BioGenToCache
cBioGenCache(cBiomeGen * a_BioGenToCache, int a_CacheSize); // Doesn't take ownership of a_BioGenToCache
~cBioGenCache();
protected:

16
source/Generating/ChunkDesc.h
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@ -30,6 +30,9 @@ class cChunkDesc
public:
// tolua_end
/// Uncompressed block metas, 1 meta per byte
typedef NIBBLETYPE BlockNibbleBytes[cChunkDef::NumBlocks];
cChunkDesc(int a_ChunkX, int a_ChunkZ);
~cChunkDesc();
@ -172,13 +175,14 @@ public:
void AddBlockEntity(cBlockEntity * a_BlockEntity);
// Accessors used by cChunkGenerator::Generator descendants:
inline cChunkDef::BiomeMap & GetBiomeMap (void) { return m_BiomeMap; }
inline cChunkDef::BlockTypes & GetBlockTypes (void) { return *((cChunkDef::BlockTypes *)m_BlockArea.GetBlockTypes()); }
inline cChunkDef::BiomeMap & GetBiomeMap (void) { return m_BiomeMap; }
inline cChunkDef::BlockTypes & GetBlockTypes (void) { return *((cChunkDef::BlockTypes *)m_BlockArea.GetBlockTypes()); }
// CANNOT, different compression!
// inline cChunkDef::BlockNibbles & GetBlockMetas (void) { return *((cChunkDef::BlockNibbles *)m_BlockArea.GetBlockMetas()); }
inline cChunkDef::HeightMap & GetHeightMap (void) { return m_HeightMap; }
inline cEntityList & GetEntities (void) { return m_Entities; }
inline cBlockEntityList & GetBlockEntities(void) { return m_BlockEntities; }
// inline cChunkDef::BlockNibbles & GetBlockMetas (void) { return *((cChunkDef::BlockNibbles *)m_BlockArea.GetBlockMetas()); }
inline BlockNibbleBytes & GetBlockMetasUncompressed(void) { return *((BlockNibbleBytes *)m_BlockArea.GetBlockMetas()); }
inline cChunkDef::HeightMap & GetHeightMap (void) { return m_HeightMap; }
inline cEntityList & GetEntities (void) { return m_Entities; }
inline cBlockEntityList & GetBlockEntities (void) { return m_BlockEntities; }
/// Compresses the metas from the BlockArea format (1 meta per byte) into regular format (2 metas per byte)
void CompressBlockMetas(cChunkDef::BlockNibbles & a_DestMetas);

5
source/Generating/ChunkGenerator.cpp
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@ -272,6 +272,11 @@ void cChunkGenerator::DoGenerate(int a_ChunkX, int a_ChunkY, int a_ChunkZ)
m_Generator->DoGenerate(a_ChunkX, a_ChunkZ, ChunkDesc);
cRoot::Get()->GetPluginManager()->CallHookChunkGenerated(m_World, a_ChunkX, a_ChunkZ, &ChunkDesc);
#ifdef _DEBUG
// Verify that the generator has produced valid data:
ChunkDesc.VerifyHeightmap();
#endif
cChunkDef::BlockNibbles BlockMetas;
ChunkDesc.CompressBlockMetas(BlockMetas);

96
source/Generating/CompoGen.cpp
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@ -483,3 +483,99 @@ void cCompoGenNether::ComposeTerrain(cChunkDesc & a_ChunkDesc)
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cCompoGenCache:
cCompoGenCache::cCompoGenCache(cTerrainCompositionGen * a_Underlying, int a_CacheSize) :
m_Underlying(a_Underlying),
m_CacheSize(a_CacheSize),
m_CacheOrder(new int[a_CacheSize]),
m_CacheData(new sCacheData[a_CacheSize]),
m_NumHits(0),
m_NumMisses(0),
m_TotalChain(0)
{
for (int i = 0; i < m_CacheSize; i++)
{
m_CacheOrder[i] = i;
m_CacheData[i].m_ChunkX = 0x7fffffff;
m_CacheData[i].m_ChunkZ = 0x7fffffff;
}
}
cCompoGenCache::~cCompoGenCache()
{
delete[] m_CacheData;
delete[] m_CacheOrder;
}
void cCompoGenCache::ComposeTerrain(cChunkDesc & a_ChunkDesc)
{
//*
if (((m_NumHits + m_NumMisses) % 1024) == 10)
{
LOGD("CompoGenCache: %d hits, %d misses, saved %.2f %%", m_NumHits, m_NumMisses, 100.0 * m_NumHits / (m_NumHits + m_NumMisses));
LOGD("CompoGenCache: Avg cache chain length: %.2f", (float)m_TotalChain / m_NumHits);
}
//*/
int ChunkX = a_ChunkDesc.GetChunkX();
int ChunkZ = a_ChunkDesc.GetChunkZ();
for (int i = 0; i < m_CacheSize; i++)
{
if (
(m_CacheData[m_CacheOrder[i]].m_ChunkX != ChunkX) ||
(m_CacheData[m_CacheOrder[i]].m_ChunkZ != ChunkZ)
)
{
continue;
}
// Found it in the cache
int Idx = m_CacheOrder[i];
// Move to front:
for (int j = i; j > 0; j--)
{
m_CacheOrder[j] = m_CacheOrder[j - 1];
}
m_CacheOrder[0] = Idx;
// Use the cached data:
memcpy(a_ChunkDesc.GetBlockTypes(), m_CacheData[Idx].m_BlockTypes, sizeof(a_ChunkDesc.GetBlockTypes()));
memcpy(a_ChunkDesc.GetBlockMetasUncompressed(), m_CacheData[Idx].m_BlockMetas, sizeof(a_ChunkDesc.GetBlockMetasUncompressed()));
m_NumHits++;
m_TotalChain += i;
return;
} // for i - cache
// Not in the cache:
m_NumMisses++;
m_Underlying->ComposeTerrain(a_ChunkDesc);
// Insert it as the first item in the MRU order:
int Idx = m_CacheOrder[m_CacheSize - 1];
for (int i = m_CacheSize - 1; i > 0; i--)
{
m_CacheOrder[i] = m_CacheOrder[i - 1];
} // for i - m_CacheOrder[]
m_CacheOrder[0] = Idx;
memcpy(m_CacheData[Idx].m_BlockTypes, a_ChunkDesc.GetBlockTypes(), sizeof(a_ChunkDesc.GetBlockTypes()));
memcpy(m_CacheData[Idx].m_BlockMetas, a_ChunkDesc.GetBlockMetasUncompressed(), sizeof(a_ChunkDesc.GetBlockMetasUncompressed()));
m_CacheData[Idx].m_ChunkX = ChunkX;
m_CacheData[Idx].m_ChunkZ = ChunkZ;
}

40
source/Generating/CompoGen.h
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@ -6,6 +6,8 @@
- cCompoGenDebugBiomes
- cCompoGenClassic
- cCompoGenBiomal
- cCompoGenNether
- cCompoGenCache
*/
@ -139,3 +141,41 @@ protected:
/// Caches most-recently-used chunk composition of another composition generator. Caches only the types and metas
class cCompoGenCache :
public cTerrainCompositionGen
{
public:
cCompoGenCache(cTerrainCompositionGen * a_Underlying, int a_CacheSize); // Doesn't take ownership of a_Underlying
~cCompoGenCache();
// cTerrainCompositionGen override:
virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc) override;
protected:
cTerrainCompositionGen * m_Underlying;
struct sCacheData
{
int m_ChunkX;
int m_ChunkZ;
cChunkDef::BlockTypes m_BlockTypes;
cChunkDesc::BlockNibbleBytes m_BlockMetas; // The metas are uncompressed, 1 meta per byte
} ;
// To avoid moving large amounts of data for the MRU behavior, we MRU-ize indices to an array of the actual data
int m_CacheSize;
int * m_CacheOrder; // MRU-ized order, indices into m_CacheData array
sCacheData * m_CacheData; // m_CacheData[m_CacheOrder[0]] is the most recently used
// Cache statistics
int m_NumHits;
int m_NumMisses;
int m_TotalChain; // Number of cache items walked to get to a hit (only added for hits)
} ;

79
source/Generating/ComposableGenerator.cpp
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@ -37,10 +37,9 @@ cComposableGenerator::cComposableGenerator(cChunkGenerator & a_ChunkGenerator) :
m_BiomeGen(NULL),
m_HeightGen(NULL),
m_CompositionGen(NULL),
m_Noise3DComposable(NULL),
m_NumNoise3DComposableUses(0),
m_DistortedHeightmap(NULL),
m_NumDistortedHeightmapUses(0)
m_UnderlyingBiomeGen(NULL),
m_UnderlyingHeightGen(NULL),
m_UnderlyingCompositionGen(NULL)
{
}
@ -62,26 +61,18 @@ cComposableGenerator::~cComposableGenerator()
}
m_StructureGens.clear();
// CompositionGen must not be freed if it is shared between HeightGenCache and CompositionGen:
int NumUsed = 1;
if (m_CompositionGen == m_Noise3DComposable)
{
NumUsed = m_NumNoise3DComposableUses;
}
else if (m_CompositionGen == m_DistortedHeightmap)
{
NumUsed = m_NumDistortedHeightmapUses;
}
if (NumUsed == 1)
{
delete m_CompositionGen;
}
delete m_CompositionGen;
m_CompositionGen = NULL;
delete m_HeightGen;
m_HeightGen = NULL;
delete m_BiomeGen;
m_BiomeGen = NULL;
delete m_UnderlyingCompositionGen;
m_UnderlyingCompositionGen = NULL;
delete m_UnderlyingHeightGen;
m_UnderlyingHeightGen = NULL;
delete m_UnderlyingBiomeGen;
m_UnderlyingBiomeGen = NULL;
}
@ -216,7 +207,8 @@ void cComposableGenerator::InitBiomeGen(cIniFile & a_IniFile)
CacheSize = 4;
}
LOGINFO("Using a cache for biomegen of size %d.", CacheSize);
m_BiomeGen = new cBioGenCache(m_BiomeGen, CacheSize);
m_UnderlyingBiomeGen = m_BiomeGen;
m_BiomeGen = new cBioGenCache(m_UnderlyingBiomeGen, CacheSize);
}
m_BiomeGen->Initialize(a_IniFile);
}
@ -255,24 +247,13 @@ void cComposableGenerator::InitHeightGen(cIniFile & a_IniFile)
}
else if (NoCaseCompare(HeightGenName, "DistortedHeightmap") == 0)
{
if (m_DistortedHeightmap == NULL)
{
m_DistortedHeightmap = new cDistortedHeightmap(Seed, *m_BiomeGen);
m_DistortedHeightmap->Initialize(a_IniFile);
}
m_HeightGen = m_DistortedHeightmap;
m_NumDistortedHeightmapUses++;
// TODO: Optimize by sharing with CompoGen
m_HeightGen = new cDistortedHeightmap(Seed, *m_BiomeGen);
((cDistortedHeightmap *)m_HeightGen)->Initialize(a_IniFile);
}
else if (NoCaseCompare(HeightGenName, "Noise3D") == 0)
{
if (m_Noise3DComposable == NULL)
{
m_Noise3DComposable = new cNoise3DComposable(Seed);
m_Noise3DComposable->Initialize(a_IniFile);
}
m_HeightGen = m_Noise3DComposable;
m_NumNoise3DComposableUses++;
m_HeightGen = new cNoise3DComposable(Seed);
((cNoise3DComposable *)m_HeightGen)->Initialize(a_IniFile);
}
else // "biomal" or <not found>
{
@ -308,7 +289,8 @@ void cComposableGenerator::InitHeightGen(cIniFile & a_IniFile)
CacheSize = 4;
}
LOGINFO("Using a cache for Heightgen of size %d.", CacheSize);
m_HeightGen = new cHeiGenCache(m_HeightGen, CacheSize);
m_UnderlyingHeightGen = m_HeightGen;
m_HeightGen = new cHeiGenCache(m_UnderlyingHeightGen, CacheSize);
}
}
@ -352,13 +334,8 @@ void cComposableGenerator::InitCompositionGen(cIniFile & a_IniFile)
}
else if (NoCaseCompare(CompoGenName, "DistortedHeightmap") == 0)
{
if (m_DistortedHeightmap == NULL)
{
m_DistortedHeightmap = new cDistortedHeightmap(m_ChunkGenerator.GetSeed(), *m_BiomeGen);
m_DistortedHeightmap->Initialize(a_IniFile);
}
m_CompositionGen = m_DistortedHeightmap;
m_NumDistortedHeightmapUses++;
m_CompositionGen = new cDistortedHeightmap(m_ChunkGenerator.GetSeed(), *m_BiomeGen);
((cDistortedHeightmap *)m_CompositionGen)->Initialize(a_IniFile);
}
else if (NoCaseCompare(CompoGenName, "nether") == 0)
{
@ -366,13 +343,8 @@ void cComposableGenerator::InitCompositionGen(cIniFile & a_IniFile)
}
else if (NoCaseCompare(CompoGenName, "Noise3D") == 0)
{
if (m_Noise3DComposable == NULL)
{
m_Noise3DComposable = new cNoise3DComposable(m_ChunkGenerator.GetSeed());
m_Noise3DComposable->Initialize(a_IniFile);
}
m_CompositionGen = m_Noise3DComposable;
m_NumNoise3DComposableUses++;
m_CompositionGen = new cNoise3DComposable(m_ChunkGenerator.GetSeed());
((cNoise3DComposable *)m_CompositionGen)->Initialize(a_IniFile);
}
else
{
@ -399,6 +371,13 @@ void cComposableGenerator::InitCompositionGen(cIniFile & a_IniFile)
LOGINFO("CompositionGen for 500 chunks took %d ticks (%.02f sec)", Duration, (double)Duration / CLOCKS_PER_SEC);
//*/
}
int CompoGenCacheSize = a_IniFile.GetValueSetI("Generator", "CompositionGenCacheSize", 64);
if (CompoGenCacheSize > 1)
{
m_UnderlyingCompositionGen = m_CompositionGen;
m_CompositionGen = new cCompoGenCache(m_UnderlyingCompositionGen, 32);
}
}

11
source/Generating/ComposableGenerator.h
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@ -148,13 +148,12 @@ protected:
cStructureGenList m_StructureGens;
cFinishGenList m_FinishGens;
// Specific generators that can be reused for different purposes - we don't want to create multiple objects for them
cNoise3DComposable * m_Noise3DComposable;
int m_NumNoise3DComposableUses; ///< How many times is it actually used?
cDistortedHeightmap * m_DistortedHeightmap;
int m_NumDistortedHeightmapUses; ///< How many times is it actually used?
// Generators underlying the caches:
cBiomeGen * m_UnderlyingBiomeGen;
cTerrainHeightGen * m_UnderlyingHeightGen;
cTerrainCompositionGen * m_UnderlyingCompositionGen;
/// Reads the biome gen settings from the ini and initializes m_BiomeGen accordingly
void InitBiomeGen(cIniFile & a_IniFile);

1
source/Generating/HeiGen.cpp
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@ -53,7 +53,6 @@ cHeiGenCache::~cHeiGenCache()
{
delete[] m_CacheData;
delete[] m_CacheOrder;
delete m_HeiGenToCache;
}

2
source/Generating/HeiGen.h
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@ -44,7 +44,7 @@ class cHeiGenCache :
public cTerrainHeightGen
{
public:
cHeiGenCache(cTerrainHeightGen * a_HeiGenToCache, int a_CacheSize); // Takes ownership of a_HeiGenToCache
cHeiGenCache(cTerrainHeightGen * a_HeiGenToCache, int a_CacheSize); // Doesn't take ownership of a_HeiGenToCache
~cHeiGenCache();
// cTerrainHeightGen override: