first commit

Minecraft.World/BiomeCache.h

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+#pragma once
+#include "..\Minecraft.World\JavaIntHash.h"
+
+class BiomeCache
+{
+private:
+	static const int DECAY_TIME = 1000 * 30;
+	static const int ZONE_SIZE_BITS = 4;
+	static const int ZONE_SIZE = 1 << ZONE_SIZE_BITS;
+	static const int ZONE_SIZE_MASK = ZONE_SIZE - 1;
+
+	const BiomeSource *source;
+	__int64 lastUpdateTime;
+
+public:
+	class Block
+	{
+	public:
+		// MGH - changed this to just cache biome indices, as we have direct access to the data if we know the index.
+// 		floatArray temps;
+// 		floatArray downfall;
+// 		BiomeArray biomes;
+		byteArray biomeIndices;
+		int x, z;
+		__int64 lastUse;
+
+		Block(int x, int z, BiomeCache *parent);
+		~Block();
+		Biome *getBiome(int x, int z);
+		float getTemperature(int x, int z);
+		float getDownfall(int x, int z);
+	};
+
+private:
+	unordered_map<__int64,Block *,LongKeyHash,LongKeyEq> cached;		// 4J - was LongHashMap
+	vector<Block *> all; // was ArrayList<Block>
+
+public:
+	BiomeCache(BiomeSource *source);
+	~BiomeCache();
+
+	Block *getBlockAt(int x, int z);
+	Biome *getBiome(int x, int z);
+	float getTemperature(int x, int z);
+	float getDownfall(int x, int z);
+	void update();
+ 	BiomeArray getBiomeBlockAt(int x, int z);
+	byteArray getBiomeIndexBlockAt(int x, int z);
+
+private:
+	CRITICAL_SECTION m_CS;
+};