001    package net.minecraft.src;
002    
003    import cpw.mods.fml.common.Side;
004    import cpw.mods.fml.common.asm.SideOnly;
005    import java.util.ArrayList;
006    import java.util.Arrays;
007    import java.util.HashMap;
008    import java.util.Iterator;
009    import java.util.List;
010    import java.util.Map;
011    import java.util.Random;
012    
013    import net.minecraftforge.common.MinecraftForge;
014    import net.minecraftforge.event.entity.EntityEvent;
015    import net.minecraftforge.event.world.ChunkEvent;
016    
017    public class Chunk
018    {
019        /**
020         * Determines if the chunk is lit or not at a light value greater than 0.
021         */
022        public static boolean isLit;
023    
024        /**
025         * Used to store block IDs, block MSBs, Sky-light maps, Block-light maps, and metadata. Each entry corresponds to a
026         * logical segment of 16x16x16 blocks, stacked vertically.
027         */
028        private ExtendedBlockStorage[] storageArrays;
029    
030        /**
031         * Contains a 16x16 mapping on the X/Z plane of the biome ID to which each colum belongs.
032         */
033        private byte[] blockBiomeArray;
034    
035        /**
036         * A map, similar to heightMap, that tracks how far down precipitation can fall.
037         */
038        public int[] precipitationHeightMap;
039    
040        /** Which columns need their skylightMaps updated. */
041        public boolean[] updateSkylightColumns;
042    
043        /** Whether or not this Chunk is currently loaded into the World */
044        public boolean isChunkLoaded;
045    
046        /** Reference to the World object. */
047        public World worldObj;
048        public int[] heightMap;
049    
050        /** The x coordinate of the chunk. */
051        public final int xPosition;
052    
053        /** The z coordinate of the chunk. */
054        public final int zPosition;
055        private boolean isGapLightingUpdated;
056    
057        /** A Map of ChunkPositions to TileEntities in this chunk */
058        public Map chunkTileEntityMap;
059    
060        /**
061         * Array of Lists containing the entities in this Chunk. Each List represents a 16 block subchunk.
062         */
063        public List[] entityLists;
064    
065        /** Boolean value indicating if the terrain is populated. */
066        public boolean isTerrainPopulated;
067    
068        /**
069         * Set to true if the chunk has been modified and needs to be updated internally.
070         */
071        public boolean isModified;
072    
073        /**
074         * Whether this Chunk has any Entities and thus requires saving on every tick
075         */
076        public boolean hasEntities;
077    
078        /** The time according to World.worldTime when this chunk was last saved */
079        public long lastSaveTime;
080        public boolean deferRender;
081        public int field_82912_p;
082    
083        /**
084         * Contains the current round-robin relight check index, and is implied as the relight check location as well.
085         */
086        private int queuedLightChecks;
087        boolean field_76653_p;
088    
089        public Chunk(World par1World, int par2, int par3)
090        {
091            this.storageArrays = new ExtendedBlockStorage[16];
092            this.blockBiomeArray = new byte[256];
093            this.precipitationHeightMap = new int[256];
094            this.updateSkylightColumns = new boolean[256];
095            this.isGapLightingUpdated = false;
096            this.chunkTileEntityMap = new HashMap();
097            this.isTerrainPopulated = false;
098            this.isModified = false;
099            this.hasEntities = false;
100            this.lastSaveTime = 0L;
101            this.deferRender = false;
102            this.field_82912_p = 0;
103            this.queuedLightChecks = 4096;
104            this.field_76653_p = false;
105            this.entityLists = new List[16];
106            this.worldObj = par1World;
107            this.xPosition = par2;
108            this.zPosition = par3;
109            this.heightMap = new int[256];
110    
111            for (int var4 = 0; var4 < this.entityLists.length; ++var4)
112            {
113                this.entityLists[var4] = new ArrayList();
114            }
115    
116            Arrays.fill(this.precipitationHeightMap, -999);
117            Arrays.fill(this.blockBiomeArray, (byte) - 1);
118        }
119    
120        public Chunk(World par1World, byte[] par2ArrayOfByte, int par3, int par4)
121        {
122            this(par1World, par3, par4);
123            int var5 = par2ArrayOfByte.length / 256;
124    
125            for (int var6 = 0; var6 < 16; ++var6)
126            {
127                for (int var7 = 0; var7 < 16; ++var7)
128                {
129                    for (int var8 = 0; var8 < var5; ++var8)
130                    {
131                        /* FORGE: The following change, a cast from unsigned byte to int,
132                         * fixes a vanilla bug when generating new chunks that contain a block ID > 127 */
133                        int var9 = par2ArrayOfByte[var6 << 11 | var7 << 7 | var8] & 0xFF;
134    
135                        if (var9 != 0)
136                        {
137                            int var10 = var8 >> 4;
138    
139                            if (this.storageArrays[var10] == null)
140                            {
141                                this.storageArrays[var10] = new ExtendedBlockStorage(var10 << 4);
142                            }
143    
144                            this.storageArrays[var10].setExtBlockID(var6, var8 & 15, var7, var9);
145                        }
146                    }
147                }
148            }
149        }
150    
151        /**
152         * Metadata sensitive Chunk constructor for use in new ChunkProviders that
153         * use metadata sensitive blocks during generation.
154         *
155         * @param world The world this chunk belongs to
156         * @param ids A ByteArray containing all the BlockID's to set this chunk to
157         * @param metadata A ByteArray containing all the metadata to set this chunk to
158         * @param chunkX The chunk's X position
159         * @param chunkZ The Chunk's Z position
160         */
161        public Chunk(World world, byte[] ids, byte[] metadata, int chunkX, int chunkZ)
162        {
163            this(world, chunkX, chunkZ);
164            int var5 = ids.length / 256;
165    
166            for (int x = 0; x < 16; ++x)
167            {
168                for (int z = 0; z < 16; ++z)
169                {
170                    for (int y = 0; y < var5; ++y)
171                    {
172                        int idx = x << 11 | z << 7 | y;
173                       int id = ids[idx] & 0xFF;
174                        int meta = metadata[idx];
175    
176                        if (id != 0)
177                        {
178                            int var10 = y >> 4;
179    
180                            if (this.storageArrays[var10] == null)
181                            {
182                                this.storageArrays[var10] = new ExtendedBlockStorage(var10 << 4);
183                            }
184    
185                            this.storageArrays[var10].setExtBlockID(x, y & 15, z, id);
186                            this.storageArrays[var10].setExtBlockMetadata(x, y & 15, z, meta);
187                        }
188                    }
189                }
190            }
191        }
192    
193        /**
194         * A Chunk Constructor which handles shorts to allow block ids > 256 (full 4096 range)
195         * Meta data sensitive
196         * NOTE: The x,y,z order of the array is different from the native Chunk constructor to allow for generation > y127
197         * NOTE: This is possibly more efficient than the standard constructor due to less memory skipping
198         *
199         * @param world The world this chunk belongs to
200         * @param ids A ShortArray containing all the BlockID's to set this chunk to (x is low order, z is mid, y is high)
201         * @param metadata A ByteArray containing all the metadata to set this chunk to
202         * @param chunkX The chunk's X position
203         * @param chunkZ The Chunk's Z position
204         */
205        public Chunk(World world, short[] ids, byte[] metadata, int chunkX, int chunkZ)
206        {
207            this(world, chunkX, chunkZ);
208            int max = ids.length / 256;
209    
210            for (int y = 0; y < max; ++y)
211            {
212                for (int z = 0; z < 16; ++z)
213                {
214                    for (int x = 0; x < 16; ++x)
215                    {
216                        int idx = y << 8 | z << 4 | x;
217                        int id = ids[idx] & 0xFFFFFF;
218                        int meta = metadata[idx];
219    
220                        if (id != 0) {
221                            int storageBlock = y >> 4;
222    
223                            if (this.storageArrays[storageBlock] == null) {
224                                    this.storageArrays[storageBlock] = new ExtendedBlockStorage(storageBlock << 4);
225                            }
226            
227                            this.storageArrays[storageBlock].setExtBlockID(x, y & 15, z, id);
228                            this.storageArrays[storageBlock].setExtBlockMetadata(x, y & 15, z, meta);
229                        }
230                    }
231                }
232            }
233        }
234    
235        /**
236         * Checks whether the chunk is at the X/Z location specified
237         */
238        public boolean isAtLocation(int par1, int par2)
239        {
240            return par1 == this.xPosition && par2 == this.zPosition;
241        }
242    
243        /**
244         * Returns the value in the height map at this x, z coordinate in the chunk
245         */
246        public int getHeightValue(int par1, int par2)
247        {
248            return this.heightMap[par2 << 4 | par1];
249        }
250    
251        /**
252         * Returns the topmost ExtendedBlockStorage instance for this Chunk that actually contains a block.
253         */
254        public int getTopFilledSegment()
255        {
256            for (int var1 = this.storageArrays.length - 1; var1 >= 0; --var1)
257            {
258                if (this.storageArrays[var1] != null)
259                {
260                    return this.storageArrays[var1].getYLocation();
261                }
262            }
263    
264            return 0;
265        }
266    
267        /**
268         * Returns the ExtendedBlockStorage array for this Chunk.
269         */
270        public ExtendedBlockStorage[] getBlockStorageArray()
271        {
272            return this.storageArrays;
273        }
274    
275        @SideOnly(Side.CLIENT)
276    
277        /**
278         * Generates the height map for a chunk from scratch
279         */
280        public void generateHeightMap()
281        {
282            int var1 = this.getTopFilledSegment();
283    
284            for (int var2 = 0; var2 < 16; ++var2)
285            {
286                int var3 = 0;
287    
288                while (var3 < 16)
289                {
290                    this.precipitationHeightMap[var2 + (var3 << 4)] = -999;
291                    int var4 = var1 + 16 - 1;
292    
293                    while (true)
294                    {
295                        if (var4 > 0)
296                        {
297                            int var5 = this.getBlockID(var2, var4 - 1, var3);
298    
299                            if (getBlockLightOpacity(var2, var4 - 1, var3) == 0)
300                            {
301                                --var4;
302                                continue;
303                            }
304    
305                            this.heightMap[var3 << 4 | var2] = var4;
306                        }
307    
308                        ++var3;
309                        break;
310                    }
311                }
312            }
313    
314            this.isModified = true;
315        }
316    
317        /**
318         * Generates the initial skylight map for the chunk upon generation or load.
319         */
320        public void generateSkylightMap()
321        {
322            int var1 = this.getTopFilledSegment();
323            this.field_82912_p = Integer.MAX_VALUE;
324            int var2;
325            int var3;
326    
327            for (var2 = 0; var2 < 16; ++var2)
328            {
329                var3 = 0;
330    
331                while (var3 < 16)
332                {
333                    this.precipitationHeightMap[var2 + (var3 << 4)] = -999;
334                    int var4 = var1 + 16 - 1;
335    
336                    while (true)
337                    {
338                        if (var4 > 0)
339                        {
340                            if (this.getBlockLightOpacity(var2, var4 - 1, var3) == 0)
341                            {
342                                --var4;
343                                continue;
344                            }
345    
346                            this.heightMap[var3 << 4 | var2] = var4;
347    
348                            if (var4 < this.field_82912_p)
349                            {
350                                this.field_82912_p = var4;
351                            }
352                        }
353    
354                        if (!this.worldObj.provider.hasNoSky)
355                        {
356                            var4 = 15;
357                            int var5 = var1 + 16 - 1;
358    
359                            do
360                            {
361                                var4 -= this.getBlockLightOpacity(var2, var5, var3);
362    
363                                if (var4 > 0)
364                                {
365                                    ExtendedBlockStorage var6 = this.storageArrays[var5 >> 4];
366    
367                                    if (var6 != null)
368                                    {
369                                        var6.setExtSkylightValue(var2, var5 & 15, var3, var4);
370                                        this.worldObj.markBlockForRenderUpdate((this.xPosition << 4) + var2, var5, (this.zPosition << 4) + var3);
371                                    }
372                                }
373    
374                                --var5;
375                            }
376                            while (var5 > 0 && var4 > 0);
377                        }
378    
379                        ++var3;
380                        break;
381                    }
382                }
383            }
384    
385            this.isModified = true;
386    
387            for (var2 = 0; var2 < 16; ++var2)
388            {
389                for (var3 = 0; var3 < 16; ++var3)
390                {
391                    this.propagateSkylightOcclusion(var2, var3);
392                }
393            }
394        }
395    
396        /**
397         * Propagates a given sky-visible block's light value downward and upward to neighboring blocks as necessary.
398         */
399        private void propagateSkylightOcclusion(int par1, int par2)
400        {
401            this.updateSkylightColumns[par1 + par2 * 16] = true;
402            this.isGapLightingUpdated = true;
403        }
404    
405        /**
406         * Runs delayed skylight updates.
407         */
408        private void updateSkylight_do()
409        {
410            this.worldObj.theProfiler.startSection("recheckGaps");
411    
412            if (this.worldObj.doChunksNearChunkExist(this.xPosition * 16 + 8, 0, this.zPosition * 16 + 8, 16))
413            {
414                for (int var1 = 0; var1 < 16; ++var1)
415                {
416                    for (int var2 = 0; var2 < 16; ++var2)
417                    {
418                        if (this.updateSkylightColumns[var1 + var2 * 16])
419                        {
420                            this.updateSkylightColumns[var1 + var2 * 16] = false;
421                            int var3 = this.getHeightValue(var1, var2);
422                            int var4 = this.xPosition * 16 + var1;
423                            int var5 = this.zPosition * 16 + var2;
424                            int var6 = this.worldObj.func_82734_g(var4 - 1, var5);
425                            int var7 = this.worldObj.func_82734_g(var4 + 1, var5);
426                            int var8 = this.worldObj.func_82734_g(var4, var5 - 1);
427                            int var9 = this.worldObj.func_82734_g(var4, var5 + 1);
428    
429                            if (var7 < var6)
430                            {
431                                var6 = var7;
432                            }
433    
434                            if (var8 < var6)
435                            {
436                                var6 = var8;
437                            }
438    
439                            if (var9 < var6)
440                            {
441                                var6 = var9;
442                            }
443    
444                            this.checkSkylightNeighborHeight(var4, var5, var6);
445                            this.checkSkylightNeighborHeight(var4 - 1, var5, var3);
446                            this.checkSkylightNeighborHeight(var4 + 1, var5, var3);
447                            this.checkSkylightNeighborHeight(var4, var5 - 1, var3);
448                            this.checkSkylightNeighborHeight(var4, var5 + 1, var3);
449                        }
450                    }
451                }
452    
453                this.isGapLightingUpdated = false;
454            }
455    
456            this.worldObj.theProfiler.endSection();
457        }
458    
459        /**
460         * Checks the height of a block next to a sky-visible block and schedules a lighting update as necessary.
461         */
462        private void checkSkylightNeighborHeight(int par1, int par2, int par3)
463        {
464            int var4 = this.worldObj.getHeightValue(par1, par2);
465    
466            if (var4 > par3)
467            {
468                this.updateSkylightNeighborHeight(par1, par2, par3, var4 + 1);
469            }
470            else if (var4 < par3)
471            {
472                this.updateSkylightNeighborHeight(par1, par2, var4, par3 + 1);
473            }
474        }
475    
476        private void updateSkylightNeighborHeight(int par1, int par2, int par3, int par4)
477        {
478            if (par4 > par3 && this.worldObj.doChunksNearChunkExist(par1, 0, par2, 16))
479            {
480                for (int var5 = par3; var5 < par4; ++var5)
481                {
482                    this.worldObj.updateLightByType(EnumSkyBlock.Sky, par1, var5, par2);
483                }
484    
485                this.isModified = true;
486            }
487        }
488    
489        /**
490         * Initiates the recalculation of both the block-light and sky-light for a given block inside a chunk.
491         */
492        private void relightBlock(int par1, int par2, int par3)
493        {
494            int var4 = this.heightMap[par3 << 4 | par1] & 255;
495            int var5 = var4;
496    
497            if (par2 > var4)
498            {
499                var5 = par2;
500            }
501    
502            while (var5 > 0 && this.getBlockLightOpacity(par1, var5 - 1, par3) == 0)
503            {
504                --var5;
505            }
506    
507            if (var5 != var4)
508            {
509                this.worldObj.markBlocksDirtyVertical(par1 + this.xPosition * 16, par3 + this.zPosition * 16, var5, var4);
510                this.heightMap[par3 << 4 | par1] = var5;
511                int var6 = this.xPosition * 16 + par1;
512                int var7 = this.zPosition * 16 + par3;
513                int var8;
514                int var12;
515    
516                if (!this.worldObj.provider.hasNoSky)
517                {
518                    ExtendedBlockStorage var9;
519    
520                    if (var5 < var4)
521                    {
522                        for (var8 = var5; var8 < var4; ++var8)
523                        {
524                            var9 = this.storageArrays[var8 >> 4];
525    
526                            if (var9 != null)
527                            {
528                                var9.setExtSkylightValue(par1, var8 & 15, par3, 15);
529                                this.worldObj.markBlockForRenderUpdate((this.xPosition << 4) + par1, var8, (this.zPosition << 4) + par3);
530                            }
531                        }
532                    }
533                    else
534                    {
535                        for (var8 = var4; var8 < var5; ++var8)
536                        {
537                            var9 = this.storageArrays[var8 >> 4];
538    
539                            if (var9 != null)
540                            {
541                                var9.setExtSkylightValue(par1, var8 & 15, par3, 0);
542                                this.worldObj.markBlockForRenderUpdate((this.xPosition << 4) + par1, var8, (this.zPosition << 4) + par3);
543                            }
544                        }
545                    }
546    
547                    var8 = 15;
548    
549                    while (var5 > 0 && var8 > 0)
550                    {
551                        --var5;
552                        var12 = this.getBlockLightOpacity(par1, var5, par3);
553    
554                        if (var12 == 0)
555                        {
556                            var12 = 1;
557                        }
558    
559                        var8 -= var12;
560    
561                        if (var8 < 0)
562                        {
563                            var8 = 0;
564                        }
565    
566                        ExtendedBlockStorage var10 = this.storageArrays[var5 >> 4];
567    
568                        if (var10 != null)
569                        {
570                            var10.setExtSkylightValue(par1, var5 & 15, par3, var8);
571                        }
572                    }
573                }
574    
575                var8 = this.heightMap[par3 << 4 | par1];
576                var12 = var4;
577                int var13 = var8;
578    
579                if (var8 < var4)
580                {
581                    var12 = var8;
582                    var13 = var4;
583                }
584    
585                if (var8 < this.field_82912_p)
586                {
587                    this.field_82912_p = var8;
588                }
589    
590                if (!this.worldObj.provider.hasNoSky)
591                {
592                    this.updateSkylightNeighborHeight(var6 - 1, var7, var12, var13);
593                    this.updateSkylightNeighborHeight(var6 + 1, var7, var12, var13);
594                    this.updateSkylightNeighborHeight(var6, var7 - 1, var12, var13);
595                    this.updateSkylightNeighborHeight(var6, var7 + 1, var12, var13);
596                    this.updateSkylightNeighborHeight(var6, var7, var12, var13);
597                }
598    
599                this.isModified = true;
600            }
601        }
602    
603        public int getBlockLightOpacity(int par1, int par2, int par3)
604        {
605            int x = (xPosition << 4) + par1;
606            int z = (zPosition << 4) + par3;
607            Block block = Block.blocksList[getBlockID(par1, par2, par3)];
608            return (block == null ? 0 : block.getLightOpacity(worldObj, x, par2, z));
609        }
610    
611        /**
612         * Return the ID of a block in the chunk.
613         */
614        public int getBlockID(int par1, int par2, int par3)
615        {
616            if (par2 >> 4 >= this.storageArrays.length || par2 >> 4 < 0)
617            {
618                return 0;
619            }
620            else
621            {
622                ExtendedBlockStorage var4 = this.storageArrays[par2 >> 4];
623                return var4 != null ? var4.getExtBlockID(par1, par2 & 15, par3) : 0;
624            }
625        }
626    
627        /**
628         * Return the metadata corresponding to the given coordinates inside a chunk.
629         */
630        public int getBlockMetadata(int par1, int par2, int par3)
631        {
632            if (par2 >> 4 >= this.storageArrays.length || par2 >> 4 < 0)
633            {
634                return 0;
635            }
636            else
637            {
638                ExtendedBlockStorage var4 = this.storageArrays[par2 >> 4];
639                return var4 != null ? var4.getExtBlockMetadata(par1, par2 & 15, par3) : 0;
640            }
641        }
642    
643        /**
644         * Sets a blockID for a position in the chunk. Args: x, y, z, blockID
645         */
646        public boolean setBlockID(int par1, int par2, int par3, int par4)
647        {
648            return this.setBlockIDWithMetadata(par1, par2, par3, par4, 0);
649        }
650    
651        /**
652         * Sets a blockID of a position within a chunk with metadata. Args: x, y, z, blockID, metadata
653         */
654        public boolean setBlockIDWithMetadata(int par1, int par2, int par3, int par4, int par5)
655        {
656            int var6 = par3 << 4 | par1;
657    
658            if (par2 >= this.precipitationHeightMap[var6] - 1)
659            {
660                this.precipitationHeightMap[var6] = -999;
661            }
662    
663            int var7 = this.heightMap[var6];
664            int var8 = this.getBlockID(par1, par2, par3);
665            int var9 = this.getBlockMetadata(par1, par2, par3);
666    
667            if (var8 == par4 && var9 == par5)
668            {
669                return false;
670            }
671            else
672            {
673                if (par2 >> 4 >= storageArrays.length || par2 >> 4 < 0)
674                {
675                    return false;
676                }
677    
678                ExtendedBlockStorage var10 = this.storageArrays[par2 >> 4];
679                boolean var11 = false;
680    
681                if (var10 == null)
682                {
683                    if (par4 == 0)
684                    {
685                        return false;
686                    }
687    
688                    var10 = this.storageArrays[par2 >> 4] = new ExtendedBlockStorage(par2 >> 4 << 4);
689                    var11 = par2 >= var7;
690                }
691    
692                int var12 = this.xPosition * 16 + par1;
693                int var13 = this.zPosition * 16 + par3;
694    
695                if (var8 != 0 && !this.worldObj.isRemote)
696                {
697                    Block.blocksList[var8].onSetBlockIDWithMetaData(this.worldObj, var12, par2, var13, var9);
698                }
699    
700                var10.setExtBlockID(par1, par2 & 15, par3, par4);
701    
702                if (var8 != 0)
703                {
704                    if (!this.worldObj.isRemote)
705                    {
706                        Block.blocksList[var8].breakBlock(this.worldObj, var12, par2, var13, var8, var9);
707                    }
708                    else if (Block.blocksList[var8] != null && Block.blocksList[var8].hasTileEntity(var9))
709                    {
710                        this.worldObj.removeBlockTileEntity(var12, par2, var13);
711                    }
712                }
713    
714                if (var10.getExtBlockID(par1, par2 & 15, par3) != par4)
715                {
716                    return false;
717                }
718                else
719                {
720                    var10.setExtBlockMetadata(par1, par2 & 15, par3, par5);
721    
722                    if (var11)
723                    {
724                        this.generateSkylightMap();
725                    }
726                    else
727                    {
728                        if (getBlockLightOpacity(par1, par2, par3) > 0)
729                        {
730                            if (par2 >= var7)
731                            {
732                                this.relightBlock(par1, par2 + 1, par3);
733                            }
734                        }
735                        else if (par2 == var7 - 1)
736                        {
737                            this.relightBlock(par1, par2, par3);
738                        }
739    
740                        this.propagateSkylightOcclusion(par1, par3);
741                    }
742    
743                    TileEntity var14;
744    
745                    if (par4 != 0)
746                    {
747                        if (!this.worldObj.isRemote)
748                        {
749                            Block.blocksList[par4].onBlockAdded(this.worldObj, var12, par2, var13);
750                        }
751    
752                        if (Block.blocksList[par4] != null && Block.blocksList[par4].hasTileEntity(par5))
753                        {
754                            var14 = this.getChunkBlockTileEntity(par1, par2, par3);
755    
756                            if (var14 == null)
757                            {
758                                var14 = Block.blocksList[par4].createTileEntity(this.worldObj, par5);
759                                this.worldObj.setBlockTileEntity(var12, par2, var13, var14);
760                            }
761    
762                            if (var14 != null)
763                            {
764                                var14.updateContainingBlockInfo();
765                                var14.blockMetadata = par5;
766                            }
767                        }
768                    }
769    
770                    this.isModified = true;
771                    return true;
772                }
773            }
774        }
775    
776        /**
777         * Set the metadata of a block in the chunk
778         */
779        public boolean setBlockMetadata(int par1, int par2, int par3, int par4)
780        {
781            ExtendedBlockStorage var5 = (par2 >> 4 >= storageArrays.length || par2 >> 4 < 0 ? null : storageArrays[par2 >> 4]);
782    
783            if (var5 == null)
784            {
785                return false;
786            }
787            else
788            {
789                int var6 = var5.getExtBlockMetadata(par1, par2 & 15, par3);
790    
791                if (var6 == par4)
792                {
793                    return false;
794                }
795                else
796                {
797                    this.isModified = true;
798                    var5.setExtBlockMetadata(par1, par2 & 15, par3, par4);
799                    int var7 = var5.getExtBlockID(par1, par2 & 15, par3);
800    
801                    if (var7 > 0 && Block.blocksList[var7] != null && Block.blocksList[var7].hasTileEntity(par4))
802                    {
803                        TileEntity var8 = this.getChunkBlockTileEntity(par1, par2, par3);
804    
805                        if (var8 != null)
806                        {
807                            var8.updateContainingBlockInfo();
808                            var8.blockMetadata = par4;
809                        }
810                    }
811    
812                    return true;
813                }
814            }
815        }
816    
817        /**
818         * Gets the amount of light saved in this block (doesn't adjust for daylight)
819         */
820        public int getSavedLightValue(EnumSkyBlock par1EnumSkyBlock, int par2, int par3, int par4)
821        {
822            ExtendedBlockStorage var5 = (par3 >> 4 >= storageArrays.length || par3 >> 4 < 0 ? null : storageArrays[par3 >> 4]);
823            return var5 == null ? (this.canBlockSeeTheSky(par2, par3, par4) ? par1EnumSkyBlock.defaultLightValue : 0) : (par1EnumSkyBlock == EnumSkyBlock.Sky ? var5.getExtSkylightValue(par2, par3 & 15, par4) : (par1EnumSkyBlock == EnumSkyBlock.Block ? var5.getExtBlocklightValue(par2, par3 & 15, par4) : par1EnumSkyBlock.defaultLightValue));
824        }
825    
826        /**
827         * Sets the light value at the coordinate. If enumskyblock is set to sky it sets it in the skylightmap and if its a
828         * block then into the blocklightmap. Args enumSkyBlock, x, y, z, lightValue
829         */
830        public void setLightValue(EnumSkyBlock par1EnumSkyBlock, int par2, int par3, int par4, int par5)
831        {
832            if (par3 >> 4 >= storageArrays.length || par3 >> 4 < 0)
833            {
834                return;
835            }
836    
837            ExtendedBlockStorage var6 = this.storageArrays[par3 >> 4];
838    
839            if (var6 == null)
840            {
841                var6 = this.storageArrays[par3 >> 4] = new ExtendedBlockStorage(par3 >> 4 << 4);
842                this.generateSkylightMap();
843            }
844    
845            this.isModified = true;
846    
847            if (par1EnumSkyBlock == EnumSkyBlock.Sky)
848            {
849                if (!this.worldObj.provider.hasNoSky)
850                {
851                    var6.setExtSkylightValue(par2, par3 & 15, par4, par5);
852                }
853            }
854            else if (par1EnumSkyBlock == EnumSkyBlock.Block)
855            {
856                var6.setExtBlocklightValue(par2, par3 & 15, par4, par5);
857            }
858        }
859    
860        /**
861         * Gets the amount of light on a block taking into account sunlight
862         */
863        public int getBlockLightValue(int par1, int par2, int par3, int par4)
864        {
865            ExtendedBlockStorage var5 = (par2 >> 4 >= storageArrays.length || par2 >> 4 < 0 ? null : storageArrays[par2 >> 4]);
866    
867            if (var5 == null)
868            {
869                return !this.worldObj.provider.hasNoSky && par4 < EnumSkyBlock.Sky.defaultLightValue ? EnumSkyBlock.Sky.defaultLightValue - par4 : 0;
870            }
871            else
872            {
873                int var6 = this.worldObj.provider.hasNoSky ? 0 : var5.getExtSkylightValue(par1, par2 & 15, par3);
874    
875                if (var6 > 0)
876                {
877                    isLit = true;
878                }
879    
880                var6 -= par4;
881                int var7 = var5.getExtBlocklightValue(par1, par2 & 15, par3);
882    
883                if (var7 > var6)
884                {
885                    var6 = var7;
886                }
887    
888                return var6;
889            }
890        }
891    
892        /**
893         * Adds an entity to the chunk. Args: entity
894         */
895        public void addEntity(Entity par1Entity)
896        {
897            this.hasEntities = true;
898            int var2 = MathHelper.floor_double(par1Entity.posX / 16.0D);
899            int var3 = MathHelper.floor_double(par1Entity.posZ / 16.0D);
900    
901            if (var2 != this.xPosition || var3 != this.zPosition)
902            {
903                System.out.println("Wrong location! " + par1Entity);
904                Thread.dumpStack();
905            }
906    
907            int var4 = MathHelper.floor_double(par1Entity.posY / 16.0D);
908    
909            if (var4 < 0)
910            {
911                var4 = 0;
912            }
913    
914            if (var4 >= this.entityLists.length)
915            {
916                var4 = this.entityLists.length - 1;
917            }
918            MinecraftForge.EVENT_BUS.post(new EntityEvent.EnteringChunk(par1Entity, this.xPosition, this.zPosition, par1Entity.chunkCoordX, par1Entity.chunkCoordZ));
919            par1Entity.addedToChunk = true;
920            par1Entity.chunkCoordX = this.xPosition;
921            par1Entity.chunkCoordY = var4;
922            par1Entity.chunkCoordZ = this.zPosition;
923            this.entityLists[var4].add(par1Entity);
924        }
925    
926        /**
927         * removes entity using its y chunk coordinate as its index
928         */
929        public void removeEntity(Entity par1Entity)
930        {
931            this.removeEntityAtIndex(par1Entity, par1Entity.chunkCoordY);
932        }
933    
934        /**
935         * Removes entity at the specified index from the entity array.
936         */
937        public void removeEntityAtIndex(Entity par1Entity, int par2)
938        {
939            if (par2 < 0)
940            {
941                par2 = 0;
942            }
943    
944            if (par2 >= this.entityLists.length)
945            {
946                par2 = this.entityLists.length - 1;
947            }
948    
949            this.entityLists[par2].remove(par1Entity);
950        }
951    
952        /**
953         * Returns whether is not a block above this one blocking sight to the sky (done via checking against the heightmap)
954         */
955        public boolean canBlockSeeTheSky(int par1, int par2, int par3)
956        {
957            return par2 >= this.heightMap[par3 << 4 | par1];
958        }
959    
960        /**
961         * Gets the TileEntity for a given block in this chunk
962         */
963        public TileEntity getChunkBlockTileEntity(int par1, int par2, int par3)
964        {
965            ChunkPosition var4 = new ChunkPosition(par1, par2, par3);
966            TileEntity var5 = (TileEntity)this.chunkTileEntityMap.get(var4);
967    
968            if (var5 != null && var5.isInvalid())
969            {
970                chunkTileEntityMap.remove(var4);
971                var5 = null;
972            }
973    
974            if (var5 == null)
975            {
976                int var6 = this.getBlockID(par1, par2, par3);
977    
978                int meta = this.getBlockMetadata(par1, par2, par3);
979    
980                if (var6 <= 0 || !Block.blocksList[var6].hasTileEntity(meta))
981                {
982                    return null;
983                }
984    
985                if (var5 == null)
986                {
987                    var5 = Block.blocksList[var6].createTileEntity(this.worldObj, meta);
988                    this.worldObj.setBlockTileEntity(this.xPosition * 16 + par1, par2, this.zPosition * 16 + par3, var5);
989                }
990    
991                var5 = (TileEntity)this.chunkTileEntityMap.get(var4);
992            }
993    
994            return var5;
995        }
996    
997        /**
998         * Adds a TileEntity to a chunk
999         */
1000        public void addTileEntity(TileEntity par1TileEntity)
1001        {
1002            int var2 = par1TileEntity.xCoord - this.xPosition * 16;
1003            int var3 = par1TileEntity.yCoord;
1004            int var4 = par1TileEntity.zCoord - this.zPosition * 16;
1005            this.setChunkBlockTileEntity(var2, var3, var4, par1TileEntity);
1006    
1007            if (this.isChunkLoaded)
1008            {
1009                this.worldObj.addTileEntity(par1TileEntity);
1010            }
1011        }
1012    
1013        /**
1014         * Sets the TileEntity for a given block in this chunk
1015         */
1016        public void setChunkBlockTileEntity(int par1, int par2, int par3, TileEntity par4TileEntity)
1017        {
1018            ChunkPosition var5 = new ChunkPosition(par1, par2, par3);
1019            par4TileEntity.setWorldObj(this.worldObj);
1020            par4TileEntity.xCoord = this.xPosition * 16 + par1;
1021            par4TileEntity.yCoord = par2;
1022            par4TileEntity.zCoord = this.zPosition * 16 + par3;
1023    
1024            Block block = Block.blocksList[getBlockID(par1, par2, par3)];
1025            if (block != null && block.hasTileEntity(getBlockMetadata(par1, par2, par3)))
1026            {
1027                TileEntity old = (TileEntity)chunkTileEntityMap.get(var5);
1028                if (old != null)
1029                {
1030                    old.invalidate();
1031                }
1032                par4TileEntity.validate();
1033                this.chunkTileEntityMap.put(var5, par4TileEntity);
1034            }
1035        }
1036    
1037        /**
1038         * Removes the TileEntity for a given block in this chunk
1039         */
1040        public void removeChunkBlockTileEntity(int par1, int par2, int par3)
1041        {
1042            ChunkPosition var4 = new ChunkPosition(par1, par2, par3);
1043    
1044            if (this.isChunkLoaded)
1045            {
1046                TileEntity var5 = (TileEntity)this.chunkTileEntityMap.remove(var4);
1047    
1048                if (var5 != null)
1049                {
1050                    var5.invalidate();
1051                }
1052            }
1053        }
1054    
1055        /**
1056         * Called when this Chunk is loaded by the ChunkProvider
1057         */
1058        public void onChunkLoad()
1059        {
1060            this.isChunkLoaded = true;
1061            this.worldObj.addTileEntity(this.chunkTileEntityMap.values());
1062    
1063            for (int var1 = 0; var1 < this.entityLists.length; ++var1)
1064            {
1065                this.worldObj.addLoadedEntities(this.entityLists[var1]);
1066            }
1067            MinecraftForge.EVENT_BUS.post(new ChunkEvent.Load(this));
1068        }
1069    
1070        /**
1071         * Called when this Chunk is unloaded by the ChunkProvider
1072         */
1073        public void onChunkUnload()
1074        {
1075            this.isChunkLoaded = false;
1076            Iterator var1 = this.chunkTileEntityMap.values().iterator();
1077    
1078            while (var1.hasNext())
1079            {
1080                TileEntity var2 = (TileEntity)var1.next();
1081                this.worldObj.markTileEntityForDespawn(var2);
1082            }
1083    
1084            for (int var3 = 0; var3 < this.entityLists.length; ++var3)
1085            {
1086                this.worldObj.unloadEntities(this.entityLists[var3]);
1087            }
1088            MinecraftForge.EVENT_BUS.post(new ChunkEvent.Unload(this));
1089        }
1090    
1091        /**
1092         * Sets the isModified flag for this Chunk
1093         */
1094        public void setChunkModified()
1095        {
1096            this.isModified = true;
1097        }
1098    
1099        /**
1100         * Fills the given list of all entities that intersect within the given bounding box that aren't the passed entity
1101         * Args: entity, aabb, listToFill
1102         */
1103        public void getEntitiesWithinAABBForEntity(Entity par1Entity, AxisAlignedBB par2AxisAlignedBB, List par3List)
1104        {
1105            int var4 = MathHelper.floor_double((par2AxisAlignedBB.minY - World.MAX_ENTITY_RADIUS) / 16.0D);
1106            int var5 = MathHelper.floor_double((par2AxisAlignedBB.maxY + World.MAX_ENTITY_RADIUS) / 16.0D);
1107    
1108            if (var4 < 0)
1109            {
1110                var4 = 0;
1111            }
1112    
1113            if (var5 >= this.entityLists.length)
1114            {
1115                var5 = this.entityLists.length - 1;
1116            }
1117    
1118            for (int var6 = var4; var6 <= var5; ++var6)
1119            {
1120                List var7 = this.entityLists[var6];
1121    
1122                for (int var8 = 0; var8 < var7.size(); ++var8)
1123                {
1124                    Entity var9 = (Entity)var7.get(var8);
1125    
1126                    if (var9 != par1Entity && var9.boundingBox.intersectsWith(par2AxisAlignedBB))
1127                    {
1128                        par3List.add(var9);
1129                        Entity[] var10 = var9.getParts();
1130    
1131                        if (var10 != null)
1132                        {
1133                            for (int var11 = 0; var11 < var10.length; ++var11)
1134                            {
1135                                var9 = var10[var11];
1136    
1137                                if (var9 != par1Entity && var9.boundingBox.intersectsWith(par2AxisAlignedBB))
1138                                {
1139                                    par3List.add(var9);
1140                                }
1141                            }
1142                        }
1143                    }
1144                }
1145            }
1146        }
1147    
1148        /**
1149         * Gets all entities that can be assigned to the specified class. Args: entityClass, aabb, listToFill
1150         */
1151        public void getEntitiesOfTypeWithinAAAB(Class par1Class, AxisAlignedBB par2AxisAlignedBB, List par3List, IEntitySelector par4IEntitySelector)
1152        {
1153            int var5 = MathHelper.floor_double((par2AxisAlignedBB.minY - World.MAX_ENTITY_RADIUS) / 16.0D);
1154            int var6 = MathHelper.floor_double((par2AxisAlignedBB.maxY + World.MAX_ENTITY_RADIUS) / 16.0D);
1155    
1156            if (var5 < 0)
1157            {
1158                var5 = 0;
1159            }
1160            else if (var5 >= this.entityLists.length)
1161            {
1162                var5 = this.entityLists.length - 1;
1163            }
1164    
1165            if (var6 >= this.entityLists.length)
1166            {
1167                var6 = this.entityLists.length - 1;
1168            }
1169            else if (var6 < 0)
1170            {
1171                var6 = 0;
1172            }
1173    
1174            for (int var7 = var5; var7 <= var6; ++var7)
1175            {
1176                List var8 = this.entityLists[var7];
1177    
1178                for (int var9 = 0; var9 < var8.size(); ++var9)
1179                {
1180                    Entity var10 = (Entity)var8.get(var9);
1181    
1182                    if (par1Class.isAssignableFrom(var10.getClass()) && var10.boundingBox.intersectsWith(par2AxisAlignedBB) && (par4IEntitySelector == null || par4IEntitySelector.isEntityApplicable(var10)))
1183                    {
1184                        par3List.add(var10);
1185                    }
1186                }
1187            }
1188        }
1189    
1190        /**
1191         * Returns true if this Chunk needs to be saved
1192         */
1193        public boolean needsSaving(boolean par1)
1194        {
1195            if (par1)
1196            {
1197                if (this.hasEntities && this.worldObj.getTotalWorldTime() != this.lastSaveTime)
1198                {
1199                    return true;
1200                }
1201            }
1202            else if (this.hasEntities && this.worldObj.getTotalWorldTime() >= this.lastSaveTime + 600L)
1203            {
1204                return true;
1205            }
1206    
1207            return this.isModified;
1208        }
1209    
1210        public Random getRandomWithSeed(long par1)
1211        {
1212            return new Random(this.worldObj.getSeed() + (long)(this.xPosition * this.xPosition * 4987142) + (long)(this.xPosition * 5947611) + (long)(this.zPosition * this.zPosition) * 4392871L + (long)(this.zPosition * 389711) ^ par1);
1213        }
1214    
1215        public boolean isEmpty()
1216        {
1217            return false;
1218        }
1219    
1220        public void populateChunk(IChunkProvider par1IChunkProvider, IChunkProvider par2IChunkProvider, int par3, int par4)
1221        {
1222            if (!this.isTerrainPopulated && par1IChunkProvider.chunkExists(par3 + 1, par4 + 1) && par1IChunkProvider.chunkExists(par3, par4 + 1) && par1IChunkProvider.chunkExists(par3 + 1, par4))
1223            {
1224                par1IChunkProvider.populate(par2IChunkProvider, par3, par4);
1225            }
1226    
1227            if (par1IChunkProvider.chunkExists(par3 - 1, par4) && !par1IChunkProvider.provideChunk(par3 - 1, par4).isTerrainPopulated && par1IChunkProvider.chunkExists(par3 - 1, par4 + 1) && par1IChunkProvider.chunkExists(par3, par4 + 1) && par1IChunkProvider.chunkExists(par3 - 1, par4 + 1))
1228            {
1229                par1IChunkProvider.populate(par2IChunkProvider, par3 - 1, par4);
1230            }
1231    
1232            if (par1IChunkProvider.chunkExists(par3, par4 - 1) && !par1IChunkProvider.provideChunk(par3, par4 - 1).isTerrainPopulated && par1IChunkProvider.chunkExists(par3 + 1, par4 - 1) && par1IChunkProvider.chunkExists(par3 + 1, par4 - 1) && par1IChunkProvider.chunkExists(par3 + 1, par4))
1233            {
1234                par1IChunkProvider.populate(par2IChunkProvider, par3, par4 - 1);
1235            }
1236    
1237            if (par1IChunkProvider.chunkExists(par3 - 1, par4 - 1) && !par1IChunkProvider.provideChunk(par3 - 1, par4 - 1).isTerrainPopulated && par1IChunkProvider.chunkExists(par3, par4 - 1) && par1IChunkProvider.chunkExists(par3 - 1, par4))
1238            {
1239                par1IChunkProvider.populate(par2IChunkProvider, par3 - 1, par4 - 1);
1240            }
1241        }
1242    
1243        /**
1244         * Gets the height to which rain/snow will fall. Calculates it if not already stored.
1245         */
1246        public int getPrecipitationHeight(int par1, int par2)
1247        {
1248            int var3 = par1 | par2 << 4;
1249            int var4 = this.precipitationHeightMap[var3];
1250    
1251            if (var4 == -999)
1252            {
1253                int var5 = this.getTopFilledSegment() + 15;
1254                var4 = -1;
1255    
1256                while (var5 > 0 && var4 == -1)
1257                {
1258                    int var6 = this.getBlockID(par1, var5, par2);
1259                    Material var7 = var6 == 0 ? Material.air : Block.blocksList[var6].blockMaterial;
1260    
1261                    if (!var7.blocksMovement() && !var7.isLiquid())
1262                    {
1263                        --var5;
1264                    }
1265                    else
1266                    {
1267                        var4 = var5 + 1;
1268                    }
1269                }
1270    
1271                this.precipitationHeightMap[var3] = var4;
1272            }
1273    
1274            return var4;
1275        }
1276    
1277        /**
1278         * Checks whether skylight needs updated; if it does, calls updateSkylight_do
1279         */
1280        public void updateSkylight()
1281        {
1282            if (this.isGapLightingUpdated && !this.worldObj.provider.hasNoSky)
1283            {
1284                this.updateSkylight_do();
1285            }
1286        }
1287    
1288        /**
1289         * Gets a ChunkCoordIntPair representing the Chunk's position.
1290         */
1291        public ChunkCoordIntPair getChunkCoordIntPair()
1292        {
1293            return new ChunkCoordIntPair(this.xPosition, this.zPosition);
1294        }
1295    
1296        /**
1297         * Returns whether the ExtendedBlockStorages containing levels (in blocks) from arg 1 to arg 2 are fully empty
1298         * (true) or not (false).
1299         */
1300        public boolean getAreLevelsEmpty(int par1, int par2)
1301        {
1302            if (par1 < 0)
1303            {
1304                par1 = 0;
1305            }
1306    
1307            if (par2 >= 256)
1308            {
1309                par2 = 255;
1310            }
1311    
1312            for (int var3 = par1; var3 <= par2; var3 += 16)
1313            {
1314                ExtendedBlockStorage var4 = this.storageArrays[var3 >> 4];
1315    
1316                if (var4 != null && !var4.isEmpty())
1317                {
1318                    return false;
1319                }
1320            }
1321    
1322            return true;
1323        }
1324    
1325        public void setStorageArrays(ExtendedBlockStorage[] par1ArrayOfExtendedBlockStorage)
1326        {
1327            this.storageArrays = par1ArrayOfExtendedBlockStorage;
1328        }
1329    
1330        @SideOnly(Side.CLIENT)
1331    
1332        /**
1333         * Initialise this chunk with new binary data
1334         */
1335        public void fillChunk(byte[] par1ArrayOfByte, int par2, int par3, boolean par4)
1336        {
1337            Iterator iterator = chunkTileEntityMap.values().iterator();
1338            while(iterator.hasNext())
1339            {
1340                TileEntity tileEntity = (TileEntity)iterator.next();
1341                tileEntity.updateContainingBlockInfo();
1342                tileEntity.getBlockMetadata();
1343                tileEntity.getBlockType();
1344            }
1345    
1346            int var5 = 0;
1347            int var6;
1348    
1349            for (var6 = 0; var6 < this.storageArrays.length; ++var6)
1350            {
1351                if ((par2 & 1 << var6) != 0)
1352                {
1353                    if (this.storageArrays[var6] == null)
1354                    {
1355                        this.storageArrays[var6] = new ExtendedBlockStorage(var6 << 4);
1356                    }
1357    
1358                    byte[] var7 = this.storageArrays[var6].getBlockLSBArray();
1359                    System.arraycopy(par1ArrayOfByte, var5, var7, 0, var7.length);
1360                    var5 += var7.length;
1361                }
1362                else if (par4 && this.storageArrays[var6] != null)
1363                {
1364                    this.storageArrays[var6] = null;
1365                }
1366            }
1367    
1368            NibbleArray var8;
1369    
1370            for (var6 = 0; var6 < this.storageArrays.length; ++var6)
1371            {
1372                if ((par2 & 1 << var6) != 0 && this.storageArrays[var6] != null)
1373                {
1374                    var8 = this.storageArrays[var6].getMetadataArray();
1375                    System.arraycopy(par1ArrayOfByte, var5, var8.data, 0, var8.data.length);
1376                    var5 += var8.data.length;
1377                }
1378            }
1379    
1380            for (var6 = 0; var6 < this.storageArrays.length; ++var6)
1381            {
1382                if ((par2 & 1 << var6) != 0 && this.storageArrays[var6] != null)
1383                {
1384                    var8 = this.storageArrays[var6].getBlocklightArray();
1385                    System.arraycopy(par1ArrayOfByte, var5, var8.data, 0, var8.data.length);
1386                    var5 += var8.data.length;
1387                }
1388            }
1389    
1390            for (var6 = 0; var6 < this.storageArrays.length; ++var6)
1391            {
1392                if ((par2 & 1 << var6) != 0 && this.storageArrays[var6] != null)
1393                {
1394                    var8 = this.storageArrays[var6].getSkylightArray();
1395                    System.arraycopy(par1ArrayOfByte, var5, var8.data, 0, var8.data.length);
1396                    var5 += var8.data.length;
1397                }
1398            }
1399    
1400            for (var6 = 0; var6 < this.storageArrays.length; ++var6)
1401            {
1402                if ((par3 & 1 << var6) != 0)
1403                {
1404                    if (this.storageArrays[var6] == null)
1405                    {
1406                        var5 += 2048;
1407                    }
1408                    else
1409                    {
1410                        var8 = this.storageArrays[var6].getBlockMSBArray();
1411    
1412                        if (var8 == null)
1413                        {
1414                            var8 = this.storageArrays[var6].createBlockMSBArray();
1415                        }
1416    
1417                        System.arraycopy(par1ArrayOfByte, var5, var8.data, 0, var8.data.length);
1418                        var5 += var8.data.length;
1419                    }
1420                }
1421                else if (par4 && this.storageArrays[var6] != null && this.storageArrays[var6].getBlockMSBArray() != null)
1422                {
1423                    this.storageArrays[var6].clearMSBArray();
1424                }
1425            }
1426    
1427            if (par4)
1428            {
1429                System.arraycopy(par1ArrayOfByte, var5, this.blockBiomeArray, 0, this.blockBiomeArray.length);
1430                int var10000 = var5 + this.blockBiomeArray.length;
1431            }
1432    
1433            for (var6 = 0; var6 < this.storageArrays.length; ++var6)
1434            {
1435                if (this.storageArrays[var6] != null && (par2 & 1 << var6) != 0)
1436                {
1437                    this.storageArrays[var6].removeInvalidBlocks();
1438                }
1439            }
1440    
1441            this.generateHeightMap();
1442    
1443            List<TileEntity> invalidList = new ArrayList<TileEntity>();
1444            iterator = chunkTileEntityMap.values().iterator();
1445            while (iterator.hasNext())
1446            {
1447                TileEntity tileEntity = (TileEntity)iterator.next();
1448                int x = tileEntity.xCoord & 15;
1449                int y = tileEntity.yCoord;
1450                int z = tileEntity.zCoord & 15;
1451                Block block = tileEntity.getBlockType();
1452                if (block == null || block.blockID != getBlockID(x, y, z) || tileEntity.getBlockMetadata() != getBlockMetadata(x, y, z))
1453                {
1454                    invalidList.add(tileEntity);
1455                }
1456                tileEntity.updateContainingBlockInfo();
1457            }
1458    
1459            for (TileEntity tileEntity : invalidList)
1460            {
1461                tileEntity.invalidate();
1462            }
1463        }
1464    
1465        /**
1466         * This method retrieves the biome at a set of coordinates
1467         */
1468        public BiomeGenBase getBiomeGenForWorldCoords(int par1, int par2, WorldChunkManager par3WorldChunkManager)
1469        {
1470            int var4 = this.blockBiomeArray[par2 << 4 | par1] & 255;
1471    
1472            if (var4 == 255)
1473            {
1474                BiomeGenBase var5 = par3WorldChunkManager.getBiomeGenAt((this.xPosition << 4) + par1, (this.zPosition << 4) + par2);
1475                var4 = var5.biomeID;
1476                this.blockBiomeArray[par2 << 4 | par1] = (byte)(var4 & 255);
1477            }
1478    
1479            return BiomeGenBase.biomeList[var4] == null ? BiomeGenBase.plains : BiomeGenBase.biomeList[var4];
1480        }
1481    
1482        /**
1483         * Returns an array containing a 16x16 mapping on the X/Z of block positions in this Chunk to biome IDs.
1484         */
1485        public byte[] getBiomeArray()
1486        {
1487            return this.blockBiomeArray;
1488        }
1489    
1490        /**
1491         * Accepts a 256-entry array that contains a 16x16 mapping on the X/Z plane of block positions in this Chunk to
1492         * biome IDs.
1493         */
1494        public void setBiomeArray(byte[] par1ArrayOfByte)
1495        {
1496            this.blockBiomeArray = par1ArrayOfByte;
1497        }
1498    
1499        /**
1500         * Resets the relight check index to 0 for this Chunk.
1501         */
1502        public void resetRelightChecks()
1503        {
1504            this.queuedLightChecks = 0;
1505        }
1506    
1507        /**
1508         * Called once-per-chunk-per-tick, and advances the round-robin relight check index per-storage-block by up to 8
1509         * blocks at a time. In a worst-case scenario, can potentially take up to 1.6 seconds, calculated via
1510         * (4096/(8*16))/20, to re-check all blocks in a chunk, which could explain both lagging light updates in certain
1511         * cases as well as Nether relight
1512         */
1513        public void enqueueRelightChecks()
1514        {
1515            for (int var1 = 0; var1 < 8; ++var1)
1516            {
1517                if (this.queuedLightChecks >= 4096)
1518                {
1519                    return;
1520                }
1521    
1522                int var2 = this.queuedLightChecks % 16;
1523                int var3 = this.queuedLightChecks / 16 % 16;
1524                int var4 = this.queuedLightChecks / 256;
1525                ++this.queuedLightChecks;
1526                int var5 = (this.xPosition << 4) + var3;
1527                int var6 = (this.zPosition << 4) + var4;
1528    
1529                for (int var7 = 0; var7 < 16; ++var7)
1530                {
1531                    int var8 = (var2 << 4) + var7;
1532    
1533                    if (this.storageArrays[var2] == null && (var7 == 0 || var7 == 15 || var3 == 0 || var3 == 15 || var4 == 0 || var4 == 15) || this.storageArrays[var2] != null && this.storageArrays[var2].getExtBlockID(var3, var7, var4) == 0)
1534                    {
1535                        if (Block.lightValue[this.worldObj.getBlockId(var5, var8 - 1, var6)] > 0)
1536                        {
1537                            this.worldObj.updateAllLightTypes(var5, var8 - 1, var6);
1538                        }
1539    
1540                        if (Block.lightValue[this.worldObj.getBlockId(var5, var8 + 1, var6)] > 0)
1541                        {
1542                            this.worldObj.updateAllLightTypes(var5, var8 + 1, var6);
1543                        }
1544    
1545                        if (Block.lightValue[this.worldObj.getBlockId(var5 - 1, var8, var6)] > 0)
1546                        {
1547                            this.worldObj.updateAllLightTypes(var5 - 1, var8, var6);
1548                        }
1549    
1550                        if (Block.lightValue[this.worldObj.getBlockId(var5 + 1, var8, var6)] > 0)
1551                        {
1552                            this.worldObj.updateAllLightTypes(var5 + 1, var8, var6);
1553                        }
1554    
1555                        if (Block.lightValue[this.worldObj.getBlockId(var5, var8, var6 - 1)] > 0)
1556                        {
1557                            this.worldObj.updateAllLightTypes(var5, var8, var6 - 1);
1558                        }
1559    
1560                        if (Block.lightValue[this.worldObj.getBlockId(var5, var8, var6 + 1)] > 0)
1561                        {
1562                            this.worldObj.updateAllLightTypes(var5, var8, var6 + 1);
1563                        }
1564    
1565                        this.worldObj.updateAllLightTypes(var5, var8, var6);
1566                    }
1567                }
1568            }
1569        }
1570    
1571        /** FORGE: Used to remove only invalid TileEntities */
1572        public void cleanChunkBlockTileEntity(int x, int y, int z)
1573        {
1574            ChunkPosition position = new ChunkPosition(x, y, z);
1575            if (isChunkLoaded)
1576            {
1577                TileEntity entity = (TileEntity)chunkTileEntityMap.get(position);
1578                if (entity != null && entity.isInvalid())
1579                {
1580                    chunkTileEntityMap.remove(position);
1581                }
1582            }
1583        }
1584    }