1 files changed, 182 insertions, 0 deletions

diff --git a/src/Generating/CompoGen.h b/src/Generating/CompoGen.h
new file mode 100644
index 000000000..2ee286b06
--- /dev/null
+++ b/src/Generating/CompoGen.h
@@ -0,0 +1,182 @@
+
+// CompoGen.h
+
+/* Interfaces to the various terrain composition generators:
+	- cCompoGenSameBlock
+	- cCompoGenDebugBiomes
+	- cCompoGenClassic
+	- cCompoGenBiomal
+	- cCompoGenNether
+	- cCompoGenCache
+*/
+
+
+
+
+
+#pragma once
+
+#include "ComposableGenerator.h"
+#include "../Noise.h"
+
+
+
+
+
+class cCompoGenSameBlock :
+	public cTerrainCompositionGen
+{
+public:
+	cCompoGenSameBlock(void) :
+		m_BlockType(E_BLOCK_STONE),
+		m_IsBedrocked(true)
+	{}
+	
+protected:
+
+	BLOCKTYPE m_BlockType;
+	bool      m_IsBedrocked;
+	
+	// cTerrainCompositionGen overrides:
+	virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc) override;
+	virtual void InitializeCompoGen(cIniFile & a_IniFile) override;
+} ;
+
+
+
+
+
+class cCompoGenDebugBiomes :
+	public cTerrainCompositionGen
+{
+public:
+	cCompoGenDebugBiomes(void) {}
+	
+protected:
+	
+	// cTerrainCompositionGen overrides:
+	virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc) override;
+} ;
+
+
+
+
+
+class cCompoGenClassic :
+	public cTerrainCompositionGen
+{
+public:
+	cCompoGenClassic(void);
+	
+protected:
+
+	int m_SeaLevel;
+	int m_BeachHeight;
+	int m_BeachDepth;
+	BLOCKTYPE m_BlockTop;
+	BLOCKTYPE m_BlockMiddle;
+	BLOCKTYPE m_BlockBottom;
+	BLOCKTYPE m_BlockBeach;
+	BLOCKTYPE m_BlockBeachBottom;
+	BLOCKTYPE m_BlockSea;
+	
+	// cTerrainCompositionGen overrides:
+	virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc) override;
+	virtual void InitializeCompoGen(cIniFile & a_IniFile) override;
+} ;
+
+
+
+
+
+class cCompoGenBiomal :
+	public cTerrainCompositionGen
+{
+public:
+	cCompoGenBiomal(int a_Seed) :
+		m_Noise(a_Seed + 1000),
+		m_SeaLevel(62)
+	{
+	}
+	
+protected:
+
+	cNoise m_Noise;
+	int    m_SeaLevel;
+	
+	// cTerrainCompositionGen overrides:
+	virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc) override;
+	virtual void InitializeCompoGen(cIniFile & a_IniFile) override;
+	
+	void FillColumnGrass    (int a_RelX, int a_RelZ, int a_Height, cChunkDef::BlockTypes & a_BlockTypes);
+	void FillColumnSand     (int a_RelX, int a_RelZ, int a_Height, cChunkDef::BlockTypes & a_BlockTypes);
+	void FillColumnMycelium (int a_RelX, int a_RelZ, int a_Height, cChunkDef::BlockTypes & a_BlockTypes);
+	void FillColumnWaterSand(int a_RelX, int a_RelZ, int a_Height, cChunkDef::BlockTypes & a_BlockTypes);
+	void FillColumnWaterDirt(int a_RelX, int a_RelZ, int a_Height, cChunkDef::BlockTypes & a_BlockTypes);
+	
+	void FillColumnPattern  (int a_RelX, int a_RelZ, int a_Height, cChunkDef::BlockTypes & a_BlockTypes, const BLOCKTYPE * a_Pattern, int a_PatternSize);
+} ;
+
+
+
+
+
+class cCompoGenNether :
+	public cTerrainCompositionGen
+{
+public:
+	cCompoGenNether(int a_Seed);
+	
+protected:
+	cNoise m_Noise1;
+	cNoise m_Noise2;
+	
+	int m_Threshold;
+	
+	// cTerrainCompositionGen overrides:
+	virtual void ComposeTerrain(cChunkDesc & a_ChunkDesc) override;
+	virtual void InitializeCompoGen(cIniFile & a_IniFile) override;
+} ;
+
+
+
+
+
+/// 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;
+	virtual void InitializeCompoGen(cIniFile & a_IniFile) 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)
+} ;
+
+
+
+