105 lines
2.7 KiB
Java
105 lines
2.7 KiB
Java
package biomesoplenty.helpers;
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import java.util.ArrayList;
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import java.util.List;
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import net.minecraft.util.LongHashMap;
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import net.minecraft.world.biome.BiomeGenBase;
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import biomesoplenty.world.WorldChunkManagerPromised;
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public class BiomeCachePromised
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{
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/** Reference to the WorldChunkManager */
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private final WorldChunkManagerPromised chunkManager;
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/** The last time this BiomeCache was cleaned, in milliseconds. */
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private long lastCleanupTime = 0L;
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/**
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* The map of keys to BiomeCacheBlocks. Keys are based on the chunk x, z coordinates as (x | z << 32).
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*/
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private LongHashMap cacheMap = new LongHashMap();
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/** The list of cached BiomeCacheBlocks */
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@SuppressWarnings("rawtypes")
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private List cache = new ArrayList();
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public BiomeCachePromised(WorldChunkManagerPromised par1WorldChunkManager)
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{
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chunkManager = par1WorldChunkManager;
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}
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/**
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* Returns a biome cache block at location specified.
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*/
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@SuppressWarnings("unchecked")
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public BiomeCacheBlockPromised getBiomeCacheBlock(int par1, int par2)
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{
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par1 >>= 4;
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par2 >>= 4;
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long var3 = par1 & 4294967295L | (par2 & 4294967295L) << 32;
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BiomeCacheBlockPromised var5 = (BiomeCacheBlockPromised)cacheMap.getValueByKey(var3);
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if (var5 == null)
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{
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var5 = new BiomeCacheBlockPromised(this, par1, par2);
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cacheMap.add(var3, var5);
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cache.add(var5);
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}
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var5.lastAccessTime = System.currentTimeMillis();
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return var5;
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}
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/**
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* Returns the BiomeGenBase related to the x, z position from the cache.
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*/
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public BiomeGenBase getBiomeGenAt(int par1, int par2)
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{
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return this.getBiomeCacheBlock(par1, par2).getBiomeGenAt(par1, par2);
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}
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/**
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* Removes BiomeCacheBlocks from this cache that haven't been accessed in at least 30 seconds.
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*/
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public void cleanupCache()
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{
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long var1 = System.currentTimeMillis();
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long var3 = var1 - lastCleanupTime;
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if (var3 > 7500L || var3 < 0L)
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{
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lastCleanupTime = var1;
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for (int var5 = 0; var5 < cache.size(); ++var5)
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{
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BiomeCacheBlockPromised var6 = (BiomeCacheBlockPromised)cache.get(var5);
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long var7 = var1 - var6.lastAccessTime;
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if (var7 > 30000L || var7 < 0L)
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{
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cache.remove(var5--);
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long var9 = var6.xPosition & 4294967295L | (var6.zPosition & 4294967295L) << 32;
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cacheMap.remove(var9);
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}
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}
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}
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}
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/**
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* Returns the array of cached biome types in the BiomeCacheBlock at the given location.
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*/
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public BiomeGenBase[] getCachedBiomes(int par1, int par2)
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{
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return this.getBiomeCacheBlock(par1, par2).biomes;
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}
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/**
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* Get the world chunk manager object for a biome list.
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*/
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static WorldChunkManagerPromised getChunkManager(BiomeCachePromised par0BiomeCache)
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{
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return par0BiomeCache.chunkManager;
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}
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}
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