001    package net.minecraft.src;
002    
003    import static net.minecraftforge.event.terraingen.DecorateBiomeEvent.Decorate.EventType.*;
004    import static net.minecraftforge.event.terraingen.InitMapGenEvent.EventType.*;
005    import static net.minecraftforge.event.terraingen.PopulateChunkEvent.Populate.EventType.*;
006    
007    import java.util.List;
008    import java.util.Random;
009    
010    import net.minecraftforge.common.*;
011    import net.minecraftforge.event.Event.*;
012    import net.minecraftforge.event.terraingen.*;
013    
014    public class ChunkProviderHell implements IChunkProvider
015    {
016        private Random hellRNG;
017    
018        /** A NoiseGeneratorOctaves used in generating nether terrain */
019        private NoiseGeneratorOctaves netherNoiseGen1;
020        private NoiseGeneratorOctaves netherNoiseGen2;
021        private NoiseGeneratorOctaves netherNoiseGen3;
022    
023        /** Determines whether slowsand or gravel can be generated at a location */
024        private NoiseGeneratorOctaves slowsandGravelNoiseGen;
025    
026        /**
027         * Determines whether something other than nettherack can be generated at a location
028         */
029        private NoiseGeneratorOctaves netherrackExculsivityNoiseGen;
030        public NoiseGeneratorOctaves netherNoiseGen6;
031        public NoiseGeneratorOctaves netherNoiseGen7;
032    
033        /** Is the world that the nether is getting generated. */
034        private World worldObj;
035        private double[] noiseField;
036        public MapGenNetherBridge genNetherBridge = new MapGenNetherBridge();
037    
038        /**
039         * Holds the noise used to determine whether slowsand can be generated at a location
040         */
041        private double[] slowsandNoise = new double[256];
042        private double[] gravelNoise = new double[256];
043    
044        /**
045         * Holds the noise used to determine whether something other than netherrack can be generated at a location
046         */
047        private double[] netherrackExclusivityNoise = new double[256];
048        private MapGenBase netherCaveGenerator = new MapGenCavesHell();
049        double[] noiseData1;
050        double[] noiseData2;
051        double[] noiseData3;
052        double[] noiseData4;
053        double[] noiseData5;
054    
055        {
056            genNetherBridge = (MapGenNetherBridge) TerrainGen.getModdedMapGen(genNetherBridge, NETHER_BRIDGE);
057            netherCaveGenerator = TerrainGen.getModdedMapGen(netherCaveGenerator, NETHER_CAVE);
058        }
059    
060        public ChunkProviderHell(World par1World, long par2)
061        {
062            this.worldObj = par1World;
063            this.hellRNG = new Random(par2);
064            this.netherNoiseGen1 = new NoiseGeneratorOctaves(this.hellRNG, 16);
065            this.netherNoiseGen2 = new NoiseGeneratorOctaves(this.hellRNG, 16);
066            this.netherNoiseGen3 = new NoiseGeneratorOctaves(this.hellRNG, 8);
067            this.slowsandGravelNoiseGen = new NoiseGeneratorOctaves(this.hellRNG, 4);
068            this.netherrackExculsivityNoiseGen = new NoiseGeneratorOctaves(this.hellRNG, 4);
069            this.netherNoiseGen6 = new NoiseGeneratorOctaves(this.hellRNG, 10);
070            this.netherNoiseGen7 = new NoiseGeneratorOctaves(this.hellRNG, 16);
071    
072            NoiseGeneratorOctaves[] noiseGens = {netherNoiseGen1, netherNoiseGen2, netherNoiseGen3, slowsandGravelNoiseGen, netherrackExculsivityNoiseGen, netherNoiseGen6, netherNoiseGen7};
073            noiseGens = TerrainGen.getModdedNoiseGenerators(par1World, this.hellRNG, noiseGens);
074            this.netherNoiseGen1 = noiseGens[0];
075            this.netherNoiseGen2 = noiseGens[1];
076            this.netherNoiseGen3 = noiseGens[2];
077            this.slowsandGravelNoiseGen = noiseGens[3];
078            this.netherrackExculsivityNoiseGen = noiseGens[4];
079            this.netherNoiseGen6 = noiseGens[5];
080            this.netherNoiseGen7 = noiseGens[6];
081        }
082    
083        /**
084         * Generates the shape of the terrain in the nether.
085         */
086        public void generateNetherTerrain(int par1, int par2, byte[] par3ArrayOfByte)
087        {
088            byte var4 = 4;
089            byte var5 = 32;
090            int var6 = var4 + 1;
091            byte var7 = 17;
092            int var8 = var4 + 1;
093            this.noiseField = this.initializeNoiseField(this.noiseField, par1 * var4, 0, par2 * var4, var6, var7, var8);
094    
095            for (int var9 = 0; var9 < var4; ++var9)
096            {
097                for (int var10 = 0; var10 < var4; ++var10)
098                {
099                    for (int var11 = 0; var11 < 16; ++var11)
100                    {
101                        double var12 = 0.125D;
102                        double var14 = this.noiseField[((var9 + 0) * var8 + var10 + 0) * var7 + var11 + 0];
103                        double var16 = this.noiseField[((var9 + 0) * var8 + var10 + 1) * var7 + var11 + 0];
104                        double var18 = this.noiseField[((var9 + 1) * var8 + var10 + 0) * var7 + var11 + 0];
105                        double var20 = this.noiseField[((var9 + 1) * var8 + var10 + 1) * var7 + var11 + 0];
106                        double var22 = (this.noiseField[((var9 + 0) * var8 + var10 + 0) * var7 + var11 + 1] - var14) * var12;
107                        double var24 = (this.noiseField[((var9 + 0) * var8 + var10 + 1) * var7 + var11 + 1] - var16) * var12;
108                        double var26 = (this.noiseField[((var9 + 1) * var8 + var10 + 0) * var7 + var11 + 1] - var18) * var12;
109                        double var28 = (this.noiseField[((var9 + 1) * var8 + var10 + 1) * var7 + var11 + 1] - var20) * var12;
110    
111                        for (int var30 = 0; var30 < 8; ++var30)
112                        {
113                            double var31 = 0.25D;
114                            double var33 = var14;
115                            double var35 = var16;
116                            double var37 = (var18 - var14) * var31;
117                            double var39 = (var20 - var16) * var31;
118    
119                            for (int var41 = 0; var41 < 4; ++var41)
120                            {
121                                int var42 = var41 + var9 * 4 << 11 | 0 + var10 * 4 << 7 | var11 * 8 + var30;
122                                short var43 = 128;
123                                double var44 = 0.25D;
124                                double var46 = var33;
125                                double var48 = (var35 - var33) * var44;
126    
127                                for (int var50 = 0; var50 < 4; ++var50)
128                                {
129                                    int var51 = 0;
130    
131                                    if (var11 * 8 + var30 < var5)
132                                    {
133                                        var51 = Block.lavaStill.blockID;
134                                    }
135    
136                                    if (var46 > 0.0D)
137                                    {
138                                        var51 = Block.netherrack.blockID;
139                                    }
140    
141                                    par3ArrayOfByte[var42] = (byte)var51;
142                                    var42 += var43;
143                                    var46 += var48;
144                                }
145    
146                                var33 += var37;
147                                var35 += var39;
148                            }
149    
150                            var14 += var22;
151                            var16 += var24;
152                            var18 += var26;
153                            var20 += var28;
154                        }
155                    }
156                }
157            }
158        }
159    
160        /**
161         * name based on ChunkProviderGenerate
162         */
163        public void replaceBlocksForBiome(int par1, int par2, byte[] par3ArrayOfByte)
164        {
165            ChunkProviderEvent.ReplaceBiomeBlocks event = new ChunkProviderEvent.ReplaceBiomeBlocks(this, par1, par2, par3ArrayOfByte, null);
166            MinecraftForge.EVENT_BUS.post(event);
167            if (event.getResult() == Result.DENY) return;
168    
169            byte var4 = 64;
170            double var5 = 0.03125D;
171            this.slowsandNoise = this.slowsandGravelNoiseGen.generateNoiseOctaves(this.slowsandNoise, par1 * 16, par2 * 16, 0, 16, 16, 1, var5, var5, 1.0D);
172            this.gravelNoise = this.slowsandGravelNoiseGen.generateNoiseOctaves(this.gravelNoise, par1 * 16, 109, par2 * 16, 16, 1, 16, var5, 1.0D, var5);
173            this.netherrackExclusivityNoise = this.netherrackExculsivityNoiseGen.generateNoiseOctaves(this.netherrackExclusivityNoise, par1 * 16, par2 * 16, 0, 16, 16, 1, var5 * 2.0D, var5 * 2.0D, var5 * 2.0D);
174    
175            for (int var7 = 0; var7 < 16; ++var7)
176            {
177                for (int var8 = 0; var8 < 16; ++var8)
178                {
179                    boolean var9 = this.slowsandNoise[var7 + var8 * 16] + this.hellRNG.nextDouble() * 0.2D > 0.0D;
180                    boolean var10 = this.gravelNoise[var7 + var8 * 16] + this.hellRNG.nextDouble() * 0.2D > 0.0D;
181                    int var11 = (int)(this.netherrackExclusivityNoise[var7 + var8 * 16] / 3.0D + 3.0D + this.hellRNG.nextDouble() * 0.25D);
182                    int var12 = -1;
183                    byte var13 = (byte)Block.netherrack.blockID;
184                    byte var14 = (byte)Block.netherrack.blockID;
185    
186                    for (int var15 = 127; var15 >= 0; --var15)
187                    {
188                        int var16 = (var8 * 16 + var7) * 128 + var15;
189    
190                        if (var15 < 127 - this.hellRNG.nextInt(5) && var15 > 0 + this.hellRNG.nextInt(5))
191                        {
192                            byte var17 = par3ArrayOfByte[var16];
193    
194                            if (var17 == 0)
195                            {
196                                var12 = -1;
197                            }
198                            else if (var17 == Block.netherrack.blockID)
199                            {
200                                if (var12 == -1)
201                                {
202                                    if (var11 <= 0)
203                                    {
204                                        var13 = 0;
205                                        var14 = (byte)Block.netherrack.blockID;
206                                    }
207                                    else if (var15 >= var4 - 4 && var15 <= var4 + 1)
208                                    {
209                                        var13 = (byte)Block.netherrack.blockID;
210                                        var14 = (byte)Block.netherrack.blockID;
211    
212                                        if (var10)
213                                        {
214                                            var13 = (byte)Block.gravel.blockID;
215                                        }
216    
217                                        if (var10)
218                                        {
219                                            var14 = (byte)Block.netherrack.blockID;
220                                        }
221    
222                                        if (var9)
223                                        {
224                                            var13 = (byte)Block.slowSand.blockID;
225                                        }
226    
227                                        if (var9)
228                                        {
229                                            var14 = (byte)Block.slowSand.blockID;
230                                        }
231                                    }
232    
233                                    if (var15 < var4 && var13 == 0)
234                                    {
235                                        var13 = (byte)Block.lavaStill.blockID;
236                                    }
237    
238                                    var12 = var11;
239    
240                                    if (var15 >= var4 - 1)
241                                    {
242                                        par3ArrayOfByte[var16] = var13;
243                                    }
244                                    else
245                                    {
246                                        par3ArrayOfByte[var16] = var14;
247                                    }
248                                }
249                                else if (var12 > 0)
250                                {
251                                    --var12;
252                                    par3ArrayOfByte[var16] = var14;
253                                }
254                            }
255                        }
256                        else
257                        {
258                            par3ArrayOfByte[var16] = (byte)Block.bedrock.blockID;
259                        }
260                    }
261                }
262            }
263        }
264    
265        /**
266         * loads or generates the chunk at the chunk location specified
267         */
268        public Chunk loadChunk(int par1, int par2)
269        {
270            return this.provideChunk(par1, par2);
271        }
272    
273        /**
274         * Will return back a chunk, if it doesn't exist and its not a MP client it will generates all the blocks for the
275         * specified chunk from the map seed and chunk seed
276         */
277        public Chunk provideChunk(int par1, int par2)
278        {
279            this.hellRNG.setSeed((long)par1 * 341873128712L + (long)par2 * 132897987541L);
280            byte[] var3 = new byte[32768];
281            this.generateNetherTerrain(par1, par2, var3);
282            this.replaceBlocksForBiome(par1, par2, var3);
283            this.netherCaveGenerator.generate(this, this.worldObj, par1, par2, var3);
284            this.genNetherBridge.generate(this, this.worldObj, par1, par2, var3);
285            Chunk var4 = new Chunk(this.worldObj, var3, par1, par2);
286            BiomeGenBase[] var5 = this.worldObj.getWorldChunkManager().loadBlockGeneratorData((BiomeGenBase[])null, par1 * 16, par2 * 16, 16, 16);
287            byte[] var6 = var4.getBiomeArray();
288    
289            for (int var7 = 0; var7 < var6.length; ++var7)
290            {
291                var6[var7] = (byte)var5[var7].biomeID;
292            }
293    
294            var4.resetRelightChecks();
295            return var4;
296        }
297    
298        /**
299         * generates a subset of the level's terrain data. Takes 7 arguments: the [empty] noise array, the position, and the
300         * size.
301         */
302        private double[] initializeNoiseField(double[] par1ArrayOfDouble, int par2, int par3, int par4, int par5, int par6, int par7)
303        {
304            ChunkProviderEvent.InitNoiseField event = new ChunkProviderEvent.InitNoiseField(this, par1ArrayOfDouble, par2, par3, par4, par5, par6, par7);
305            MinecraftForge.EVENT_BUS.post(event);
306            if (event.getResult() == Result.DENY) return event.noisefield;
307            if (par1ArrayOfDouble == null)
308            {
309                par1ArrayOfDouble = new double[par5 * par6 * par7];
310            }
311    
312            double var8 = 684.412D;
313            double var10 = 2053.236D;
314            this.noiseData4 = this.netherNoiseGen6.generateNoiseOctaves(this.noiseData4, par2, par3, par4, par5, 1, par7, 1.0D, 0.0D, 1.0D);
315            this.noiseData5 = this.netherNoiseGen7.generateNoiseOctaves(this.noiseData5, par2, par3, par4, par5, 1, par7, 100.0D, 0.0D, 100.0D);
316            this.noiseData1 = this.netherNoiseGen3.generateNoiseOctaves(this.noiseData1, par2, par3, par4, par5, par6, par7, var8 / 80.0D, var10 / 60.0D, var8 / 80.0D);
317            this.noiseData2 = this.netherNoiseGen1.generateNoiseOctaves(this.noiseData2, par2, par3, par4, par5, par6, par7, var8, var10, var8);
318            this.noiseData3 = this.netherNoiseGen2.generateNoiseOctaves(this.noiseData3, par2, par3, par4, par5, par6, par7, var8, var10, var8);
319            int var12 = 0;
320            int var13 = 0;
321            double[] var14 = new double[par6];
322            int var15;
323    
324            for (var15 = 0; var15 < par6; ++var15)
325            {
326                var14[var15] = Math.cos((double)var15 * Math.PI * 6.0D / (double)par6) * 2.0D;
327                double var16 = (double)var15;
328    
329                if (var15 > par6 / 2)
330                {
331                    var16 = (double)(par6 - 1 - var15);
332                }
333    
334                if (var16 < 4.0D)
335                {
336                    var16 = 4.0D - var16;
337                    var14[var15] -= var16 * var16 * var16 * 10.0D;
338                }
339            }
340    
341            for (var15 = 0; var15 < par5; ++var15)
342            {
343                for (int var36 = 0; var36 < par7; ++var36)
344                {
345                    double var17 = (this.noiseData4[var13] + 256.0D) / 512.0D;
346    
347                    if (var17 > 1.0D)
348                    {
349                        var17 = 1.0D;
350                    }
351    
352                    double var19 = 0.0D;
353                    double var21 = this.noiseData5[var13] / 8000.0D;
354    
355                    if (var21 < 0.0D)
356                    {
357                        var21 = -var21;
358                    }
359    
360                    var21 = var21 * 3.0D - 3.0D;
361    
362                    if (var21 < 0.0D)
363                    {
364                        var21 /= 2.0D;
365    
366                        if (var21 < -1.0D)
367                        {
368                            var21 = -1.0D;
369                        }
370    
371                        var21 /= 1.4D;
372                        var21 /= 2.0D;
373                        var17 = 0.0D;
374                    }
375                    else
376                    {
377                        if (var21 > 1.0D)
378                        {
379                            var21 = 1.0D;
380                        }
381    
382                        var21 /= 6.0D;
383                    }
384    
385                    var17 += 0.5D;
386                    var21 = var21 * (double)par6 / 16.0D;
387                    ++var13;
388    
389                    for (int var23 = 0; var23 < par6; ++var23)
390                    {
391                        double var24 = 0.0D;
392                        double var26 = var14[var23];
393                        double var28 = this.noiseData2[var12] / 512.0D;
394                        double var30 = this.noiseData3[var12] / 512.0D;
395                        double var32 = (this.noiseData1[var12] / 10.0D + 1.0D) / 2.0D;
396    
397                        if (var32 < 0.0D)
398                        {
399                            var24 = var28;
400                        }
401                        else if (var32 > 1.0D)
402                        {
403                            var24 = var30;
404                        }
405                        else
406                        {
407                            var24 = var28 + (var30 - var28) * var32;
408                        }
409    
410                        var24 -= var26;
411                        double var34;
412    
413                        if (var23 > par6 - 4)
414                        {
415                            var34 = (double)((float)(var23 - (par6 - 4)) / 3.0F);
416                            var24 = var24 * (1.0D - var34) + -10.0D * var34;
417                        }
418    
419                        if ((double)var23 < var19)
420                        {
421                            var34 = (var19 - (double)var23) / 4.0D;
422    
423                            if (var34 < 0.0D)
424                            {
425                                var34 = 0.0D;
426                            }
427    
428                            if (var34 > 1.0D)
429                            {
430                                var34 = 1.0D;
431                            }
432    
433                            var24 = var24 * (1.0D - var34) + -10.0D * var34;
434                        }
435    
436                        par1ArrayOfDouble[var12] = var24;
437                        ++var12;
438                    }
439                }
440            }
441    
442            return par1ArrayOfDouble;
443        }
444    
445        /**
446         * Checks to see if a chunk exists at x, y
447         */
448        public boolean chunkExists(int par1, int par2)
449        {
450            return true;
451        }
452    
453        /**
454         * Populates chunk with ores etc etc
455         */
456        public void populate(IChunkProvider par1IChunkProvider, int par2, int par3)
457        {
458            BlockSand.fallInstantly = true;
459    
460            MinecraftForge.EVENT_BUS.post(new PopulateChunkEvent.Pre(par1IChunkProvider, worldObj, hellRNG, par2, par3, false));
461    
462            int var4 = par2 * 16;
463            int var5 = par3 * 16;
464            this.genNetherBridge.generateStructuresInChunk(this.worldObj, this.hellRNG, par2, par3);
465            int var6;
466            int var7;
467            int var8;
468            int var9;
469    
470            boolean doGen = TerrainGen.populate(par1IChunkProvider, worldObj, hellRNG, par2, par3, false, NETHER_LAVA);
471            for (var6 = 0; doGen && var6 < 8; ++var6)
472            {
473                var7 = var4 + this.hellRNG.nextInt(16) + 8;
474                var8 = this.hellRNG.nextInt(120) + 4;
475                var9 = var5 + this.hellRNG.nextInt(16) + 8;
476                (new WorldGenHellLava(Block.lavaMoving.blockID)).generate(this.worldObj, this.hellRNG, var7, var8, var9);
477            }
478    
479            var6 = this.hellRNG.nextInt(this.hellRNG.nextInt(10) + 1) + 1;
480            int var10;
481    
482            doGen = TerrainGen.populate(par1IChunkProvider, worldObj, hellRNG, par2, par3, false, FIRE);
483            for (var7 = 0; doGen && var7 < var6; ++var7)
484            {
485                var8 = var4 + this.hellRNG.nextInt(16) + 8;
486                var9 = this.hellRNG.nextInt(120) + 4;
487                var10 = var5 + this.hellRNG.nextInt(16) + 8;
488                (new WorldGenFire()).generate(this.worldObj, this.hellRNG, var8, var9, var10);
489            }
490    
491            var6 = this.hellRNG.nextInt(this.hellRNG.nextInt(10) + 1);
492    
493            doGen = TerrainGen.populate(par1IChunkProvider, worldObj, hellRNG, par2, par3, false, GLOWSTONE);
494            for (var7 = 0; doGen && var7 < var6; ++var7)
495            {
496                var8 = var4 + this.hellRNG.nextInt(16) + 8;
497                var9 = this.hellRNG.nextInt(120) + 4;
498                var10 = var5 + this.hellRNG.nextInt(16) + 8;
499                (new WorldGenGlowStone1()).generate(this.worldObj, this.hellRNG, var8, var9, var10);
500            }
501    
502            for (var7 = 0; doGen && var7 < 10; ++var7)
503            {
504                var8 = var4 + this.hellRNG.nextInt(16) + 8;
505                var9 = this.hellRNG.nextInt(128);
506                var10 = var5 + this.hellRNG.nextInt(16) + 8;
507                (new WorldGenGlowStone2()).generate(this.worldObj, this.hellRNG, var8, var9, var10);
508            }
509    
510            MinecraftForge.EVENT_BUS.post(new DecorateBiomeEvent.Pre(worldObj, hellRNG, var4, var5));
511            
512            doGen = TerrainGen.decorate(worldObj, hellRNG, var4, var5, SHROOM);
513            if (doGen && this.hellRNG.nextInt(1) == 0)
514            {
515                var7 = var4 + this.hellRNG.nextInt(16) + 8;
516                var8 = this.hellRNG.nextInt(128);
517                var9 = var5 + this.hellRNG.nextInt(16) + 8;
518                (new WorldGenFlowers(Block.mushroomBrown.blockID)).generate(this.worldObj, this.hellRNG, var7, var8, var9);
519            }
520    
521            if (doGen && this.hellRNG.nextInt(1) == 0)
522            {
523                var7 = var4 + this.hellRNG.nextInt(16) + 8;
524                var8 = this.hellRNG.nextInt(128);
525                var9 = var5 + this.hellRNG.nextInt(16) + 8;
526                (new WorldGenFlowers(Block.mushroomRed.blockID)).generate(this.worldObj, this.hellRNG, var7, var8, var9);
527            }
528    
529            MinecraftForge.EVENT_BUS.post(new DecorateBiomeEvent.Post(worldObj, hellRNG, var4, var5));
530            MinecraftForge.EVENT_BUS.post(new PopulateChunkEvent.Post(par1IChunkProvider, worldObj, hellRNG, par2, par3, false));
531    
532            BlockSand.fallInstantly = false;
533        }
534    
535        /**
536         * Two modes of operation: if passed true, save all Chunks in one go.  If passed false, save up to two chunks.
537         * Return true if all chunks have been saved.
538         */
539        public boolean saveChunks(boolean par1, IProgressUpdate par2IProgressUpdate)
540        {
541            return true;
542        }
543    
544        /**
545         * Unloads the 100 oldest chunks from memory, due to a bug with chunkSet.add() never being called it thinks the list
546         * is always empty and will not remove any chunks.
547         */
548        public boolean unload100OldestChunks()
549        {
550            return false;
551        }
552    
553        /**
554         * Returns if the IChunkProvider supports saving.
555         */
556        public boolean canSave()
557        {
558            return true;
559        }
560    
561        /**
562         * Converts the instance data to a readable string.
563         */
564        public String makeString()
565        {
566            return "HellRandomLevelSource";
567        }
568    
569        /**
570         * Returns a list of creatures of the specified type that can spawn at the given location.
571         */
572        public List getPossibleCreatures(EnumCreatureType par1EnumCreatureType, int par2, int par3, int par4)
573        {
574            if (par1EnumCreatureType == EnumCreatureType.monster && this.genNetherBridge.hasStructureAt(par2, par3, par4))
575            {
576                return this.genNetherBridge.getSpawnList();
577            }
578            else
579            {
580                BiomeGenBase var5 = this.worldObj.getBiomeGenForCoords(par2, par4);
581                return var5 == null ? null : var5.getSpawnableList(par1EnumCreatureType);
582            }
583        }
584    
585        /**
586         * Returns the location of the closest structure of the specified type. If not found returns null.
587         */
588        public ChunkPosition findClosestStructure(World par1World, String par2Str, int par3, int par4, int par5)
589        {
590            return null;
591        }
592    
593        public int getLoadedChunkCount()
594        {
595            return 0;
596        }
597    
598        public void recreateStructures(int par1, int par2)
599        {
600            this.genNetherBridge.generate(this, this.worldObj, par1, par2, (byte[])null);
601        }
602    }