1 files changed, 32 insertions, 0 deletions
diff --git a/src/Generating/HeiGen.h b/src/Generating/HeiGen.h
index d91ace3bd..fe0a023e4 100644
--- a/src/Generating/HeiGen.h
+++ b/src/Generating/HeiGen.h
@@ -63,6 +63,38 @@ protected:
 
 
 
+/** Caches heightmaps in multiple underlying caches to improve the distribution and lower the chain length. */
+class cHeiGenMultiCache:
+	public cTerrainHeightGen
+{
+public:
+	cHeiGenMultiCache(cTerrainHeightGenPtr a_HeightGenToCache, size_t a_SubCacheSize, size_t a_NumSubCaches);
+
+	// cTerrainHeightGen overrides:
+	virtual void GenHeightMap(int a_ChunkX, int a_ChunkZ, cChunkDef::HeightMap & a_HeightMap) override;
+	
+	/** Retrieves height at the specified point in the cache, returns true if found, false if not found */
+	bool GetHeightAt(int a_ChunkX, int a_ChunkZ, int a_RelX, int a_RelZ, HEIGHTTYPE & a_Height);
+
+protected:
+	typedef SharedPtr<cHeiGenCache> cHeiGenCachePtr;
+	typedef std::vector<cHeiGenCachePtr> cHeiGenCachePtrs;
+
+
+	/** The coefficient used to turn Z coords into index (x + Coeff * z). */
+	static const size_t m_CoeffZ = 5;
+
+	/** Number of sub-caches, pulled out of m_SubCaches.size() for performance reasons. */
+	size_t m_NumSubCaches;
+
+	/** The individual sub-caches. */
+	cHeiGenCachePtrs m_SubCaches;
+};
+
+
+
+
+
 class cHeiGenFlat :
 	public cTerrainHeightGen
 {