001package net.minecraft.world.gen;
002
003import java.util.List;
004import java.util.Random;
005import net.minecraft.block.Block;
006import net.minecraft.block.BlockSand;
007import net.minecraft.entity.EnumCreatureType;
008import net.minecraft.util.IProgressUpdate;
009import net.minecraft.world.ChunkPosition;
010import net.minecraft.world.World;
011import net.minecraft.world.biome.BiomeGenBase;
012import net.minecraft.world.chunk.Chunk;
013import net.minecraft.world.chunk.IChunkProvider;
014import net.minecraft.world.gen.feature.WorldGenFire;
015import net.minecraft.world.gen.feature.WorldGenFlowers;
016import net.minecraft.world.gen.feature.WorldGenGlowStone1;
017import net.minecraft.world.gen.feature.WorldGenGlowStone2;
018import net.minecraft.world.gen.feature.WorldGenHellLava;
019import net.minecraft.world.gen.feature.WorldGenMinable;
020import net.minecraft.world.gen.structure.MapGenNetherBridge;
021
022import static net.minecraftforge.event.terraingen.DecorateBiomeEvent.Decorate.EventType.*;
023import static net.minecraftforge.event.terraingen.InitMapGenEvent.EventType.*;
024import static net.minecraftforge.event.terraingen.PopulateChunkEvent.Populate.EventType.*;
025import net.minecraftforge.common.*;
026import net.minecraftforge.event.Event.*;
027import net.minecraftforge.event.terraingen.*;
028
029public class ChunkProviderHell implements IChunkProvider
030{
031    private Random hellRNG;
032
033    /** A NoiseGeneratorOctaves used in generating nether terrain */
034    private NoiseGeneratorOctaves netherNoiseGen1;
035    private NoiseGeneratorOctaves netherNoiseGen2;
036    private NoiseGeneratorOctaves netherNoiseGen3;
037
038    /** Determines whether slowsand or gravel can be generated at a location */
039    private NoiseGeneratorOctaves slowsandGravelNoiseGen;
040
041    /**
042     * Determines whether something other than nettherack can be generated at a location
043     */
044    private NoiseGeneratorOctaves netherrackExculsivityNoiseGen;
045    public NoiseGeneratorOctaves netherNoiseGen6;
046    public NoiseGeneratorOctaves netherNoiseGen7;
047
048    /** Is the world that the nether is getting generated. */
049    private World worldObj;
050    private double[] noiseField;
051    public MapGenNetherBridge genNetherBridge = new MapGenNetherBridge();
052
053    /**
054     * Holds the noise used to determine whether slowsand can be generated at a location
055     */
056    private double[] slowsandNoise = new double[256];
057    private double[] gravelNoise = new double[256];
058
059    /**
060     * Holds the noise used to determine whether something other than netherrack can be generated at a location
061     */
062    private double[] netherrackExclusivityNoise = new double[256];
063    private MapGenBase netherCaveGenerator = new MapGenCavesHell();
064    double[] noiseData1;
065    double[] noiseData2;
066    double[] noiseData3;
067    double[] noiseData4;
068    double[] noiseData5;
069
070    {
071        genNetherBridge = (MapGenNetherBridge) TerrainGen.getModdedMapGen(genNetherBridge, NETHER_BRIDGE);
072        netherCaveGenerator = TerrainGen.getModdedMapGen(netherCaveGenerator, NETHER_CAVE);
073    }
074
075    public ChunkProviderHell(World par1World, long par2)
076    {
077        this.worldObj = par1World;
078        this.hellRNG = new Random(par2);
079        this.netherNoiseGen1 = new NoiseGeneratorOctaves(this.hellRNG, 16);
080        this.netherNoiseGen2 = new NoiseGeneratorOctaves(this.hellRNG, 16);
081        this.netherNoiseGen3 = new NoiseGeneratorOctaves(this.hellRNG, 8);
082        this.slowsandGravelNoiseGen = new NoiseGeneratorOctaves(this.hellRNG, 4);
083        this.netherrackExculsivityNoiseGen = new NoiseGeneratorOctaves(this.hellRNG, 4);
084        this.netherNoiseGen6 = new NoiseGeneratorOctaves(this.hellRNG, 10);
085        this.netherNoiseGen7 = new NoiseGeneratorOctaves(this.hellRNG, 16);
086
087        NoiseGeneratorOctaves[] noiseGens = {netherNoiseGen1, netherNoiseGen2, netherNoiseGen3, slowsandGravelNoiseGen, netherrackExculsivityNoiseGen, netherNoiseGen6, netherNoiseGen7};
088        noiseGens = TerrainGen.getModdedNoiseGenerators(par1World, this.hellRNG, noiseGens);
089        this.netherNoiseGen1 = noiseGens[0];
090        this.netherNoiseGen2 = noiseGens[1];
091        this.netherNoiseGen3 = noiseGens[2];
092        this.slowsandGravelNoiseGen = noiseGens[3];
093        this.netherrackExculsivityNoiseGen = noiseGens[4];
094        this.netherNoiseGen6 = noiseGens[5];
095        this.netherNoiseGen7 = noiseGens[6];
096    }
097
098    /**
099     * Generates the shape of the terrain in the nether.
100     */
101    public void generateNetherTerrain(int par1, int par2, byte[] par3ArrayOfByte)
102    {
103        byte b0 = 4;
104        byte b1 = 32;
105        int k = b0 + 1;
106        byte b2 = 17;
107        int l = b0 + 1;
108        this.noiseField = this.initializeNoiseField(this.noiseField, par1 * b0, 0, par2 * b0, k, b2, l);
109
110        for (int i1 = 0; i1 < b0; ++i1)
111        {
112            for (int j1 = 0; j1 < b0; ++j1)
113            {
114                for (int k1 = 0; k1 < 16; ++k1)
115                {
116                    double d0 = 0.125D;
117                    double d1 = this.noiseField[((i1 + 0) * l + j1 + 0) * b2 + k1 + 0];
118                    double d2 = this.noiseField[((i1 + 0) * l + j1 + 1) * b2 + k1 + 0];
119                    double d3 = this.noiseField[((i1 + 1) * l + j1 + 0) * b2 + k1 + 0];
120                    double d4 = this.noiseField[((i1 + 1) * l + j1 + 1) * b2 + k1 + 0];
121                    double d5 = (this.noiseField[((i1 + 0) * l + j1 + 0) * b2 + k1 + 1] - d1) * d0;
122                    double d6 = (this.noiseField[((i1 + 0) * l + j1 + 1) * b2 + k1 + 1] - d2) * d0;
123                    double d7 = (this.noiseField[((i1 + 1) * l + j1 + 0) * b2 + k1 + 1] - d3) * d0;
124                    double d8 = (this.noiseField[((i1 + 1) * l + j1 + 1) * b2 + k1 + 1] - d4) * d0;
125
126                    for (int l1 = 0; l1 < 8; ++l1)
127                    {
128                        double d9 = 0.25D;
129                        double d10 = d1;
130                        double d11 = d2;
131                        double d12 = (d3 - d1) * d9;
132                        double d13 = (d4 - d2) * d9;
133
134                        for (int i2 = 0; i2 < 4; ++i2)
135                        {
136                            int j2 = i2 + i1 * 4 << 11 | 0 + j1 * 4 << 7 | k1 * 8 + l1;
137                            short short1 = 128;
138                            double d14 = 0.25D;
139                            double d15 = d10;
140                            double d16 = (d11 - d10) * d14;
141
142                            for (int k2 = 0; k2 < 4; ++k2)
143                            {
144                                int l2 = 0;
145
146                                if (k1 * 8 + l1 < b1)
147                                {
148                                    l2 = Block.lavaStill.blockID;
149                                }
150
151                                if (d15 > 0.0D)
152                                {
153                                    l2 = Block.netherrack.blockID;
154                                }
155
156                                par3ArrayOfByte[j2] = (byte)l2;
157                                j2 += short1;
158                                d15 += d16;
159                            }
160
161                            d10 += d12;
162                            d11 += d13;
163                        }
164
165                        d1 += d5;
166                        d2 += d6;
167                        d3 += d7;
168                        d4 += d8;
169                    }
170                }
171            }
172        }
173    }
174
175    /**
176     * name based on ChunkProviderGenerate
177     */
178    public void replaceBlocksForBiome(int par1, int par2, byte[] par3ArrayOfByte)
179    {
180        ChunkProviderEvent.ReplaceBiomeBlocks event = new ChunkProviderEvent.ReplaceBiomeBlocks(this, par1, par2, par3ArrayOfByte, null);
181        MinecraftForge.EVENT_BUS.post(event);
182        if (event.getResult() == Result.DENY) return;
183
184        byte b0 = 64;
185        double d0 = 0.03125D;
186        this.slowsandNoise = this.slowsandGravelNoiseGen.generateNoiseOctaves(this.slowsandNoise, par1 * 16, par2 * 16, 0, 16, 16, 1, d0, d0, 1.0D);
187        this.gravelNoise = this.slowsandGravelNoiseGen.generateNoiseOctaves(this.gravelNoise, par1 * 16, 109, par2 * 16, 16, 1, 16, d0, 1.0D, d0);
188        this.netherrackExclusivityNoise = this.netherrackExculsivityNoiseGen.generateNoiseOctaves(this.netherrackExclusivityNoise, par1 * 16, par2 * 16, 0, 16, 16, 1, d0 * 2.0D, d0 * 2.0D, d0 * 2.0D);
189
190        for (int k = 0; k < 16; ++k)
191        {
192            for (int l = 0; l < 16; ++l)
193            {
194                boolean flag = this.slowsandNoise[k + l * 16] + this.hellRNG.nextDouble() * 0.2D > 0.0D;
195                boolean flag1 = this.gravelNoise[k + l * 16] + this.hellRNG.nextDouble() * 0.2D > 0.0D;
196                int i1 = (int)(this.netherrackExclusivityNoise[k + l * 16] / 3.0D + 3.0D + this.hellRNG.nextDouble() * 0.25D);
197                int j1 = -1;
198                byte b1 = (byte)Block.netherrack.blockID;
199                byte b2 = (byte)Block.netherrack.blockID;
200
201                for (int k1 = 127; k1 >= 0; --k1)
202                {
203                    int l1 = (l * 16 + k) * 128 + k1;
204
205                    if (k1 < 127 - this.hellRNG.nextInt(5) && k1 > 0 + this.hellRNG.nextInt(5))
206                    {
207                        byte b3 = par3ArrayOfByte[l1];
208
209                        if (b3 == 0)
210                        {
211                            j1 = -1;
212                        }
213                        else if (b3 == Block.netherrack.blockID)
214                        {
215                            if (j1 == -1)
216                            {
217                                if (i1 <= 0)
218                                {
219                                    b1 = 0;
220                                    b2 = (byte)Block.netherrack.blockID;
221                                }
222                                else if (k1 >= b0 - 4 && k1 <= b0 + 1)
223                                {
224                                    b1 = (byte)Block.netherrack.blockID;
225                                    b2 = (byte)Block.netherrack.blockID;
226
227                                    if (flag1)
228                                    {
229                                        b1 = (byte)Block.gravel.blockID;
230                                    }
231
232                                    if (flag1)
233                                    {
234                                        b2 = (byte)Block.netherrack.blockID;
235                                    }
236
237                                    if (flag)
238                                    {
239                                        b1 = (byte)Block.slowSand.blockID;
240                                    }
241
242                                    if (flag)
243                                    {
244                                        b2 = (byte)Block.slowSand.blockID;
245                                    }
246                                }
247
248                                if (k1 < b0 && b1 == 0)
249                                {
250                                    b1 = (byte)Block.lavaStill.blockID;
251                                }
252
253                                j1 = i1;
254
255                                if (k1 >= b0 - 1)
256                                {
257                                    par3ArrayOfByte[l1] = b1;
258                                }
259                                else
260                                {
261                                    par3ArrayOfByte[l1] = b2;
262                                }
263                            }
264                            else if (j1 > 0)
265                            {
266                                --j1;
267                                par3ArrayOfByte[l1] = b2;
268                            }
269                        }
270                    }
271                    else
272                    {
273                        par3ArrayOfByte[l1] = (byte)Block.bedrock.blockID;
274                    }
275                }
276            }
277        }
278    }
279
280    /**
281     * loads or generates the chunk at the chunk location specified
282     */
283    public Chunk loadChunk(int par1, int par2)
284    {
285        return this.provideChunk(par1, par2);
286    }
287
288    /**
289     * Will return back a chunk, if it doesn't exist and its not a MP client it will generates all the blocks for the
290     * specified chunk from the map seed and chunk seed
291     */
292    public Chunk provideChunk(int par1, int par2)
293    {
294        this.hellRNG.setSeed((long)par1 * 341873128712L + (long)par2 * 132897987541L);
295        byte[] abyte = new byte[32768];
296        this.generateNetherTerrain(par1, par2, abyte);
297        this.replaceBlocksForBiome(par1, par2, abyte);
298        this.netherCaveGenerator.generate(this, this.worldObj, par1, par2, abyte);
299        this.genNetherBridge.generate(this, this.worldObj, par1, par2, abyte);
300        Chunk chunk = new Chunk(this.worldObj, abyte, par1, par2);
301        BiomeGenBase[] abiomegenbase = this.worldObj.getWorldChunkManager().loadBlockGeneratorData((BiomeGenBase[])null, par1 * 16, par2 * 16, 16, 16);
302        byte[] abyte1 = chunk.getBiomeArray();
303
304        for (int k = 0; k < abyte1.length; ++k)
305        {
306            abyte1[k] = (byte)abiomegenbase[k].biomeID;
307        }
308
309        chunk.resetRelightChecks();
310        return chunk;
311    }
312
313    /**
314     * generates a subset of the level's terrain data. Takes 7 arguments: the [empty] noise array, the position, and the
315     * size.
316     */
317    private double[] initializeNoiseField(double[] par1ArrayOfDouble, int par2, int par3, int par4, int par5, int par6, int par7)
318    {
319        ChunkProviderEvent.InitNoiseField event = new ChunkProviderEvent.InitNoiseField(this, par1ArrayOfDouble, par2, par3, par4, par5, par6, par7);
320        MinecraftForge.EVENT_BUS.post(event);
321        if (event.getResult() == Result.DENY) return event.noisefield;
322        if (par1ArrayOfDouble == null)
323        {
324            par1ArrayOfDouble = new double[par5 * par6 * par7];
325        }
326
327        double d0 = 684.412D;
328        double d1 = 2053.236D;
329        this.noiseData4 = this.netherNoiseGen6.generateNoiseOctaves(this.noiseData4, par2, par3, par4, par5, 1, par7, 1.0D, 0.0D, 1.0D);
330        this.noiseData5 = this.netherNoiseGen7.generateNoiseOctaves(this.noiseData5, par2, par3, par4, par5, 1, par7, 100.0D, 0.0D, 100.0D);
331        this.noiseData1 = this.netherNoiseGen3.generateNoiseOctaves(this.noiseData1, par2, par3, par4, par5, par6, par7, d0 / 80.0D, d1 / 60.0D, d0 / 80.0D);
332        this.noiseData2 = this.netherNoiseGen1.generateNoiseOctaves(this.noiseData2, par2, par3, par4, par5, par6, par7, d0, d1, d0);
333        this.noiseData3 = this.netherNoiseGen2.generateNoiseOctaves(this.noiseData3, par2, par3, par4, par5, par6, par7, d0, d1, d0);
334        int k1 = 0;
335        int l1 = 0;
336        double[] adouble1 = new double[par6];
337        int i2;
338
339        for (i2 = 0; i2 < par6; ++i2)
340        {
341            adouble1[i2] = Math.cos((double)i2 * Math.PI * 6.0D / (double)par6) * 2.0D;
342            double d2 = (double)i2;
343
344            if (i2 > par6 / 2)
345            {
346                d2 = (double)(par6 - 1 - i2);
347            }
348
349            if (d2 < 4.0D)
350            {
351                d2 = 4.0D - d2;
352                adouble1[i2] -= d2 * d2 * d2 * 10.0D;
353            }
354        }
355
356        for (i2 = 0; i2 < par5; ++i2)
357        {
358            for (int j2 = 0; j2 < par7; ++j2)
359            {
360                double d3 = (this.noiseData4[l1] + 256.0D) / 512.0D;
361
362                if (d3 > 1.0D)
363                {
364                    d3 = 1.0D;
365                }
366
367                double d4 = 0.0D;
368                double d5 = this.noiseData5[l1] / 8000.0D;
369
370                if (d5 < 0.0D)
371                {
372                    d5 = -d5;
373                }
374
375                d5 = d5 * 3.0D - 3.0D;
376
377                if (d5 < 0.0D)
378                {
379                    d5 /= 2.0D;
380
381                    if (d5 < -1.0D)
382                    {
383                        d5 = -1.0D;
384                    }
385
386                    d5 /= 1.4D;
387                    d5 /= 2.0D;
388                    d3 = 0.0D;
389                }
390                else
391                {
392                    if (d5 > 1.0D)
393                    {
394                        d5 = 1.0D;
395                    }
396
397                    d5 /= 6.0D;
398                }
399
400                d3 += 0.5D;
401                d5 = d5 * (double)par6 / 16.0D;
402                ++l1;
403
404                for (int k2 = 0; k2 < par6; ++k2)
405                {
406                    double d6 = 0.0D;
407                    double d7 = adouble1[k2];
408                    double d8 = this.noiseData2[k1] / 512.0D;
409                    double d9 = this.noiseData3[k1] / 512.0D;
410                    double d10 = (this.noiseData1[k1] / 10.0D + 1.0D) / 2.0D;
411
412                    if (d10 < 0.0D)
413                    {
414                        d6 = d8;
415                    }
416                    else if (d10 > 1.0D)
417                    {
418                        d6 = d9;
419                    }
420                    else
421                    {
422                        d6 = d8 + (d9 - d8) * d10;
423                    }
424
425                    d6 -= d7;
426                    double d11;
427
428                    if (k2 > par6 - 4)
429                    {
430                        d11 = (double)((float)(k2 - (par6 - 4)) / 3.0F);
431                        d6 = d6 * (1.0D - d11) + -10.0D * d11;
432                    }
433
434                    if ((double)k2 < d4)
435                    {
436                        d11 = (d4 - (double)k2) / 4.0D;
437
438                        if (d11 < 0.0D)
439                        {
440                            d11 = 0.0D;
441                        }
442
443                        if (d11 > 1.0D)
444                        {
445                            d11 = 1.0D;
446                        }
447
448                        d6 = d6 * (1.0D - d11) + -10.0D * d11;
449                    }
450
451                    par1ArrayOfDouble[k1] = d6;
452                    ++k1;
453                }
454            }
455        }
456
457        return par1ArrayOfDouble;
458    }
459
460    /**
461     * Checks to see if a chunk exists at x, y
462     */
463    public boolean chunkExists(int par1, int par2)
464    {
465        return true;
466    }
467
468    /**
469     * Populates chunk with ores etc etc
470     */
471    public void populate(IChunkProvider par1IChunkProvider, int par2, int par3)
472    {
473        BlockSand.fallInstantly = true;
474
475        MinecraftForge.EVENT_BUS.post(new PopulateChunkEvent.Pre(par1IChunkProvider, worldObj, hellRNG, par2, par3, false));
476
477        int k = par2 * 16;
478        int l = par3 * 16;
479        this.genNetherBridge.generateStructuresInChunk(this.worldObj, this.hellRNG, par2, par3);
480        int i1;
481        int j1;
482        int k1;
483        int l1;
484
485        boolean doGen = TerrainGen.populate(par1IChunkProvider, worldObj, hellRNG, par2, par3, false, NETHER_LAVA);
486        for (i1 = 0; doGen && i1 < 8; ++i1)
487        {
488            j1 = k + this.hellRNG.nextInt(16) + 8;
489            k1 = this.hellRNG.nextInt(120) + 4;
490            l1 = l + this.hellRNG.nextInt(16) + 8;
491            (new WorldGenHellLava(Block.lavaMoving.blockID, false)).generate(this.worldObj, this.hellRNG, j1, k1, l1);
492        }
493
494        i1 = this.hellRNG.nextInt(this.hellRNG.nextInt(10) + 1) + 1;
495        int i2;
496
497        doGen = TerrainGen.populate(par1IChunkProvider, worldObj, hellRNG, par2, par3, false, FIRE);
498        for (j1 = 0; doGen && j1 < i1; ++j1)
499        {
500            k1 = k + this.hellRNG.nextInt(16) + 8;
501            l1 = this.hellRNG.nextInt(120) + 4;
502            i2 = l + this.hellRNG.nextInt(16) + 8;
503            (new WorldGenFire()).generate(this.worldObj, this.hellRNG, k1, l1, i2);
504        }
505
506        i1 = this.hellRNG.nextInt(this.hellRNG.nextInt(10) + 1);
507
508        doGen = TerrainGen.populate(par1IChunkProvider, worldObj, hellRNG, par2, par3, false, GLOWSTONE);
509        for (j1 = 0; doGen && j1 < i1; ++j1)
510        {
511            k1 = k + this.hellRNG.nextInt(16) + 8;
512            l1 = this.hellRNG.nextInt(120) + 4;
513            i2 = l + this.hellRNG.nextInt(16) + 8;
514            (new WorldGenGlowStone1()).generate(this.worldObj, this.hellRNG, k1, l1, i2);
515        }
516
517        for (j1 = 0; doGen && j1 < 10; ++j1)
518        {
519            k1 = k + this.hellRNG.nextInt(16) + 8;
520            l1 = this.hellRNG.nextInt(128);
521            i2 = l + this.hellRNG.nextInt(16) + 8;
522            (new WorldGenGlowStone2()).generate(this.worldObj, this.hellRNG, k1, l1, i2);
523        }
524
525        MinecraftForge.EVENT_BUS.post(new DecorateBiomeEvent.Pre(worldObj, hellRNG, k, l));
526        
527        doGen = TerrainGen.decorate(worldObj, hellRNG, k, l, SHROOM);
528        if (doGen && this.hellRNG.nextInt(1) == 0)
529        {
530            j1 = k + this.hellRNG.nextInt(16) + 8;
531            k1 = this.hellRNG.nextInt(128);
532            l1 = l + this.hellRNG.nextInt(16) + 8;
533            (new WorldGenFlowers(Block.mushroomBrown.blockID)).generate(this.worldObj, this.hellRNG, j1, k1, l1);
534        }
535
536        if (doGen && this.hellRNG.nextInt(1) == 0)
537        {
538            j1 = k + this.hellRNG.nextInt(16) + 8;
539            k1 = this.hellRNG.nextInt(128);
540            l1 = l + this.hellRNG.nextInt(16) + 8;
541            (new WorldGenFlowers(Block.mushroomRed.blockID)).generate(this.worldObj, this.hellRNG, j1, k1, l1);
542        }
543
544        WorldGenMinable worldgenminable = new WorldGenMinable(Block.oreNetherQuartz.blockID, 13, Block.netherrack.blockID);
545        int j2;
546
547        for (k1 = 0; k1 < 16; ++k1)
548        {
549            l1 = k + this.hellRNG.nextInt(16);
550            i2 = this.hellRNG.nextInt(108) + 10;
551            j2 = l + this.hellRNG.nextInt(16);
552            worldgenminable.generate(this.worldObj, this.hellRNG, l1, i2, j2);
553        }
554
555        for (k1 = 0; k1 < 16; ++k1)
556        {
557            l1 = k + this.hellRNG.nextInt(16);
558            i2 = this.hellRNG.nextInt(108) + 10;
559            j2 = l + this.hellRNG.nextInt(16);
560            (new WorldGenHellLava(Block.lavaMoving.blockID, true)).generate(this.worldObj, this.hellRNG, l1, i2, j2);
561        }
562
563        MinecraftForge.EVENT_BUS.post(new DecorateBiomeEvent.Post(worldObj, hellRNG, k, l));
564        MinecraftForge.EVENT_BUS.post(new PopulateChunkEvent.Post(par1IChunkProvider, worldObj, hellRNG, par2, par3, false));
565
566        BlockSand.fallInstantly = false;
567    }
568
569    /**
570     * Two modes of operation: if passed true, save all Chunks in one go.  If passed false, save up to two chunks.
571     * Return true if all chunks have been saved.
572     */
573    public boolean saveChunks(boolean par1, IProgressUpdate par2IProgressUpdate)
574    {
575        return true;
576    }
577
578    /**
579     * Unloads chunks that are marked to be unloaded. This is not guaranteed to unload every such chunk.
580     */
581    public boolean unloadQueuedChunks()
582    {
583        return false;
584    }
585
586    /**
587     * Returns if the IChunkProvider supports saving.
588     */
589    public boolean canSave()
590    {
591        return true;
592    }
593
594    /**
595     * Converts the instance data to a readable string.
596     */
597    public String makeString()
598    {
599        return "HellRandomLevelSource";
600    }
601
602    /**
603     * Returns a list of creatures of the specified type that can spawn at the given location.
604     */
605    public List getPossibleCreatures(EnumCreatureType par1EnumCreatureType, int par2, int par3, int par4)
606    {
607        if (par1EnumCreatureType == EnumCreatureType.monster && this.genNetherBridge.hasStructureAt(par2, par3, par4))
608        {
609            return this.genNetherBridge.getSpawnList();
610        }
611        else
612        {
613            BiomeGenBase biomegenbase = this.worldObj.getBiomeGenForCoords(par2, par4);
614            return biomegenbase == null ? null : biomegenbase.getSpawnableList(par1EnumCreatureType);
615        }
616    }
617
618    /**
619     * Returns the location of the closest structure of the specified type. If not found returns null.
620     */
621    public ChunkPosition findClosestStructure(World par1World, String par2Str, int par3, int par4, int par5)
622    {
623        return null;
624    }
625
626    public int getLoadedChunkCount()
627    {
628        return 0;
629    }
630
631    public void recreateStructures(int par1, int par2)
632    {
633        this.genNetherBridge.generate(this, this.worldObj, par1, par2, (byte[])null);
634    }
635}