    001    package net.minecraft.world.gen;
    002
    003    import java.util.List;
    004    import java.util.Random;
    005    import net.minecraft.block.Block;
    006    import net.minecraft.block.BlockSand;
    007    import net.minecraft.entity.EnumCreatureType;
    008    import net.minecraft.util.IProgressUpdate;
    009    import net.minecraft.util.MathHelper;
    010    import net.minecraft.world.ChunkPosition;
    011    import net.minecraft.world.World;
    012    import net.minecraft.world.biome.BiomeGenBase;
    013    import net.minecraft.world.chunk.Chunk;
    014    import net.minecraft.world.chunk.IChunkProvider;
    015
    016    import net.minecraftforge.common.*;
    017    import net.minecraftforge.event.Event.*;
    018    import net.minecraftforge.event.terraingen.*;
    019
    020    public class ChunkProviderEnd implements IChunkProvider
    021    {
    022        private Random endRNG;
    023        private NoiseGeneratorOctaves noiseGen1;
    024        private NoiseGeneratorOctaves noiseGen2;
    025        private NoiseGeneratorOctaves noiseGen3;
    026        public NoiseGeneratorOctaves noiseGen4;
    027        public NoiseGeneratorOctaves noiseGen5;
    028        private World endWorld;
    029        private double[] densities;
    030
    031        /** The biomes that are used to generate the chunk */
    032        private BiomeGenBase[] biomesForGeneration;
    033        double[] noiseData1;
    034        double[] noiseData2;
    035        double[] noiseData3;
    036        double[] noiseData4;
    037        double[] noiseData5;
    038        int[][] field_73203_h = new int[32][32];
    039
    040        public ChunkProviderEnd(World par1World, long par2)
    041        {
    042            this.endWorld = par1World;
    043            this.endRNG = new Random(par2);
    044            this.noiseGen1 = new NoiseGeneratorOctaves(this.endRNG, 16);
    045            this.noiseGen2 = new NoiseGeneratorOctaves(this.endRNG, 16);
    046            this.noiseGen3 = new NoiseGeneratorOctaves(this.endRNG, 8);
    047            this.noiseGen4 = new NoiseGeneratorOctaves(this.endRNG, 10);
    048            this.noiseGen5 = new NoiseGeneratorOctaves(this.endRNG, 16);
    049
    050            NoiseGeneratorOctaves[] noiseGens = {noiseGen1, noiseGen2, noiseGen3, noiseGen4, noiseGen5};
    051            noiseGens = TerrainGen.getModdedNoiseGenerators(par1World, this.endRNG, noiseGens);
    052            this.noiseGen1 = noiseGens[0];
    053            this.noiseGen2 = noiseGens[1];
    054            this.noiseGen3 = noiseGens[2];
    055            this.noiseGen4 = noiseGens[3];
    056            this.noiseGen5 = noiseGens[4];
    057       }
    058
    059        public void generateTerrain(int par1, int par2, byte[] par3ArrayOfByte, BiomeGenBase[] par4ArrayOfBiomeGenBase)
    060        {
    061            byte var5 = 2;
    062            int var6 = var5 + 1;
    063            byte var7 = 33;
    064            int var8 = var5 + 1;
    065            this.densities = this.initializeNoiseField(this.densities, par1 * var5, 0, par2 * var5, var6, var7, var8);
    066
    067            for (int var9 = 0; var9 < var5; ++var9)
    068            {
    069                for (int var10 = 0; var10 < var5; ++var10)
    070                {
    071                    for (int var11 = 0; var11 < 32; ++var11)
    072                    {
    073                        double var12 = 0.25D;
    074                        double var14 = this.densities[((var9 + 0) * var8 + var10 + 0) * var7 + var11 + 0];
    075                        double var16 = this.densities[((var9 + 0) * var8 + var10 + 1) * var7 + var11 + 0];
    076                        double var18 = this.densities[((var9 + 1) * var8 + var10 + 0) * var7 + var11 + 0];
    077                        double var20 = this.densities[((var9 + 1) * var8 + var10 + 1) * var7 + var11 + 0];
    078                        double var22 = (this.densities[((var9 + 0) * var8 + var10 + 0) * var7 + var11 + 1] - var14) * var12;
    079                        double var24 = (this.densities[((var9 + 0) * var8 + var10 + 1) * var7 + var11 + 1] - var16) * var12;
    080                        double var26 = (this.densities[((var9 + 1) * var8 + var10 + 0) * var7 + var11 + 1] - var18) * var12;
    081                        double var28 = (this.densities[((var9 + 1) * var8 + var10 + 1) * var7 + var11 + 1] - var20) * var12;
    082
    083                        for (int var30 = 0; var30 < 4; ++var30)
    084                        {
    085                            double var31 = 0.125D;
    086                            double var33 = var14;
    087                            double var35 = var16;
    088                            double var37 = (var18 - var14) * var31;
    089                            double var39 = (var20 - var16) * var31;
    090
    091                            for (int var41 = 0; var41 < 8; ++var41)
    092                            {
    093                                int var42 = var41 + var9 * 8 << 11 | 0 + var10 * 8 << 7 | var11 * 4 + var30;
    094                                short var43 = 128;
    095                                double var44 = 0.125D;
    096                                double var46 = var33;
    097                                double var48 = (var35 - var33) * var44;
    098
    099                                for (int var50 = 0; var50 < 8; ++var50)
    100                                {
    101                                    int var51 = 0;
    102
    103                                    if (var46 > 0.0D)
    104                                    {
    105                                        var51 = Block.whiteStone.blockID;
    106                                    }
    107
    108                                    par3ArrayOfByte[var42] = (byte)var51;
    109                                    var42 += var43;
    110                                    var46 += var48;
    111                                }
    112
    113                                var33 += var37;
    114                                var35 += var39;
    115                            }
    116
    117                            var14 += var22;
    118                            var16 += var24;
    119                            var18 += var26;
    120                            var20 += var28;
    121                        }
    122                    }
    123                }
    124            }
    125        }
    126
    127        public void replaceBlocksForBiome(int par1, int par2, byte[] par3ArrayOfByte, BiomeGenBase[] par4ArrayOfBiomeGenBase)
    128        {
    129            ChunkProviderEvent.ReplaceBiomeBlocks event = new ChunkProviderEvent.ReplaceBiomeBlocks(this, par1, par2, par3ArrayOfByte, par4ArrayOfBiomeGenBase);
    130            MinecraftForge.EVENT_BUS.post(event);
    131            if (event.getResult() == Result.DENY) return;
    132
    133            for (int var5 = 0; var5 < 16; ++var5)
    134            {
    135                for (int var6 = 0; var6 < 16; ++var6)
    136                {
    137                    byte var7 = 1;
    138                    int var8 = -1;
    139                    byte var9 = (byte)Block.whiteStone.blockID;
    140                    byte var10 = (byte)Block.whiteStone.blockID;
    141
    142                    for (int var11 = 127; var11 >= 0; --var11)
    143                    {
    144                        int var12 = (var6 * 16 + var5) * 128 + var11;
    145                        byte var13 = par3ArrayOfByte[var12];
    146
    147                        if (var13 == 0)
    148                        {
    149                            var8 = -1;
    150                        }
    151                        else if (var13 == Block.stone.blockID)
    152                        {
    153                            if (var8 == -1)
    154                            {
    155                                if (var7 <= 0)
    156                                {
    157                                    var9 = 0;
    158                                    var10 = (byte)Block.whiteStone.blockID;
    159                                }
    160
    161                                var8 = var7;
    162
    163                                if (var11 >= 0)
    164                                {
    165                                    par3ArrayOfByte[var12] = var9;
    166                                }
    167                                else
    168                                {
    169                                    par3ArrayOfByte[var12] = var10;
    170                                }
    171                            }
    172                            else if (var8 > 0)
    173                            {
    174                                --var8;
    175                                par3ArrayOfByte[var12] = var10;
    176                            }
    177                        }
    178                    }
    179                }
    180            }
    181        }
    182
    183        /**
    184         * loads or generates the chunk at the chunk location specified
    185         */
    186        public Chunk loadChunk(int par1, int par2)
    187        {
    188            return this.provideChunk(par1, par2);
    189        }
    190
    191        /**
    192         * Will return back a chunk, if it doesn't exist and its not a MP client it will generates all the blocks for the
    193         * specified chunk from the map seed and chunk seed
    194         */
    195        public Chunk provideChunk(int par1, int par2)
    196        {
    197            this.endRNG.setSeed((long)par1 * 341873128712L + (long)par2 * 132897987541L);
    198            byte[] var3 = new byte[32768];
    199            this.biomesForGeneration = this.endWorld.getWorldChunkManager().loadBlockGeneratorData(this.biomesForGeneration, par1 * 16, par2 * 16, 16, 16);
    200            this.generateTerrain(par1, par2, var3, this.biomesForGeneration);
    201            this.replaceBlocksForBiome(par1, par2, var3, this.biomesForGeneration);
    202            Chunk var4 = new Chunk(this.endWorld, var3, par1, par2);
    203            byte[] var5 = var4.getBiomeArray();
    204
    205            for (int var6 = 0; var6 < var5.length; ++var6)
    206            {
    207                var5[var6] = (byte)this.biomesForGeneration[var6].biomeID;
    208            }
    209
    210            var4.generateSkylightMap();
    211            return var4;
    212        }
    213
    214        /**
    215         * generates a subset of the level's terrain data. Takes 7 arguments: the [empty] noise array, the position, and the
    216         * size.
    217         */
    218        private double[] initializeNoiseField(double[] par1ArrayOfDouble, int par2, int par3, int par4, int par5, int par6, int par7)
    219        {
    220            ChunkProviderEvent.InitNoiseField event = new ChunkProviderEvent.InitNoiseField(this, par1ArrayOfDouble, par2, par3, par4, par5, par6, par7);
    221            MinecraftForge.EVENT_BUS.post(event);
    222            if (event.getResult() == Result.DENY) return event.noisefield;
    223
    224            if (par1ArrayOfDouble == null)
    225            {
    226                par1ArrayOfDouble = new double[par5 * par6 * par7];
    227            }
    228
    229            double var8 = 684.412D;
    230            double var10 = 684.412D;
    231            this.noiseData4 = this.noiseGen4.generateNoiseOctaves(this.noiseData4, par2, par4, par5, par7, 1.121D, 1.121D, 0.5D);
    232            this.noiseData5 = this.noiseGen5.generateNoiseOctaves(this.noiseData5, par2, par4, par5, par7, 200.0D, 200.0D, 0.5D);
    233            var8 *= 2.0D;
    234            this.noiseData1 = this.noiseGen3.generateNoiseOctaves(this.noiseData1, par2, par3, par4, par5, par6, par7, var8 / 80.0D, var10 / 160.0D, var8 / 80.0D);
    235            this.noiseData2 = this.noiseGen1.generateNoiseOctaves(this.noiseData2, par2, par3, par4, par5, par6, par7, var8, var10, var8);
    236            this.noiseData3 = this.noiseGen2.generateNoiseOctaves(this.noiseData3, par2, par3, par4, par5, par6, par7, var8, var10, var8);
    237            int var12 = 0;
    238            int var13 = 0;
    239
    240            for (int var14 = 0; var14 < par5; ++var14)
    241            {
    242                for (int var15 = 0; var15 < par7; ++var15)
    243                {
    244                    double var16 = (this.noiseData4[var13] + 256.0D) / 512.0D;
    245
    246                    if (var16 > 1.0D)
    247                    {
    248                        var16 = 1.0D;
    249                    }
    250
    251                    double var18 = this.noiseData5[var13] / 8000.0D;
    252
    253                    if (var18 < 0.0D)
    254                    {
    255                        var18 = -var18 * 0.3D;
    256                    }
    257
    258                    var18 = var18 * 3.0D - 2.0D;
    259                    float var20 = (float)(var14 + par2 - 0) / 1.0F;
    260                    float var21 = (float)(var15 + par4 - 0) / 1.0F;
    261                    float var22 = 100.0F - MathHelper.sqrt_float(var20 * var20 + var21 * var21) * 8.0F;
    262
    263                    if (var22 > 80.0F)
    264                    {
    265                        var22 = 80.0F;
    266                    }
    267
    268                    if (var22 < -100.0F)
    269                    {
    270                        var22 = -100.0F;
    271                    }
    272
    273                    if (var18 > 1.0D)
    274                    {
    275                        var18 = 1.0D;
    276                    }
    277
    278                    var18 /= 8.0D;
    279                    var18 = 0.0D;
    280
    281                    if (var16 < 0.0D)
    282                    {
    283                        var16 = 0.0D;
    284                    }
    285
    286                    var16 += 0.5D;
    287                    var18 = var18 * (double)par6 / 16.0D;
    288                    ++var13;
    289                    double var23 = (double)par6 / 2.0D;
    290
    291                    for (int var25 = 0; var25 < par6; ++var25)
    292                    {
    293                        double var26 = 0.0D;
    294                        double var28 = ((double)var25 - var23) * 8.0D / var16;
    295
    296                        if (var28 < 0.0D)
    297                        {
    298                            var28 *= -1.0D;
    299                        }
    300
    301                        double var30 = this.noiseData2[var12] / 512.0D;
    302                        double var32 = this.noiseData3[var12] / 512.0D;
    303                        double var34 = (this.noiseData1[var12] / 10.0D + 1.0D) / 2.0D;
    304
    305                        if (var34 < 0.0D)
    306                        {
    307                            var26 = var30;
    308                        }
    309                        else if (var34 > 1.0D)
    310                        {
    311                            var26 = var32;
    312                        }
    313                        else
    314                        {
    315                            var26 = var30 + (var32 - var30) * var34;
    316                        }
    317
    318                        var26 -= 8.0D;
    319                        var26 += (double)var22;
    320                        byte var36 = 2;
    321                        double var37;
    322
    323                        if (var25 > par6 / 2 - var36)
    324                        {
    325                            var37 = (double)((float)(var25 - (par6 / 2 - var36)) / 64.0F);
    326
    327                            if (var37 < 0.0D)
    328                            {
    329                                var37 = 0.0D;
    330                            }
    331
    332                            if (var37 > 1.0D)
    333                            {
    334                                var37 = 1.0D;
    335                            }
    336
    337                            var26 = var26 * (1.0D - var37) + -3000.0D * var37;
    338                        }
    339
    340                        var36 = 8;
    341
    342                        if (var25 < var36)
    343                        {
    344                            var37 = (double)((float)(var36 - var25) / ((float)var36 - 1.0F));
    345                            var26 = var26 * (1.0D - var37) + -30.0D * var37;
    346                        }
    347
    348                        par1ArrayOfDouble[var12] = var26;
    349                        ++var12;
    350                    }
    351                }
    352            }
    353
    354            return par1ArrayOfDouble;
    355        }
    356
    357        /**
    358         * Checks to see if a chunk exists at x, y
    359         */
    360        public boolean chunkExists(int par1, int par2)
    361        {
    362            return true;
    363        }
    364
    365        /**
    366         * Populates chunk with ores etc etc
    367         */
    368        public void populate(IChunkProvider par1IChunkProvider, int par2, int par3)
    369        {
    370            BlockSand.fallInstantly = true;
    371
    372            MinecraftForge.EVENT_BUS.post(new PopulateChunkEvent.Pre(par1IChunkProvider, endWorld, endWorld.rand, par2, par3, false));
    373
    374            int var4 = par2 * 16;
    375            int var5 = par3 * 16;
    376            BiomeGenBase var6 = this.endWorld.getBiomeGenForCoords(var4 + 16, var5 + 16);
    377            var6.decorate(this.endWorld, this.endWorld.rand, var4, var5);
    378
    379            MinecraftForge.EVENT_BUS.post(new PopulateChunkEvent.Post(par1IChunkProvider, endWorld, endWorld.rand, par2, par3, false));
    380
    381            BlockSand.fallInstantly = false;
    382        }
    383
    384        /**
    385         * Two modes of operation: if passed true, save all Chunks in one go.  If passed false, save up to two chunks.
    386         * Return true if all chunks have been saved.
    387         */
    388        public boolean saveChunks(boolean par1, IProgressUpdate par2IProgressUpdate)
    389        {
    390            return true;
    391        }
    392
    393        /**
    394         * Unloads the 100 oldest chunks from memory, due to a bug with chunkSet.add() never being called it thinks the list
    395         * is always empty and will not remove any chunks.
    396         */
    397        public boolean unload100OldestChunks()
    398        {
    399            return false;
    400        }
    401
    402        /**
    403         * Returns if the IChunkProvider supports saving.
    404         */
    405        public boolean canSave()
    406        {
    407            return true;
    408        }
    409
    410        /**
    411         * Converts the instance data to a readable string.
    412         */
    413        public String makeString()
    414        {
    415            return "RandomLevelSource";
    416        }
    417
    418        /**
    419         * Returns a list of creatures of the specified type that can spawn at the given location.
    420         */
    421        public List getPossibleCreatures(EnumCreatureType par1EnumCreatureType, int par2, int par3, int par4)
    422        {
    423            BiomeGenBase var5 = this.endWorld.getBiomeGenForCoords(par2, par4);
    424            return var5 == null ? null : var5.getSpawnableList(par1EnumCreatureType);
    425        }
    426
    427        /**
    428         * Returns the location of the closest structure of the specified type. If not found returns null.
    429         */
    430        public ChunkPosition findClosestStructure(World par1World, String par2Str, int par3, int par4, int par5)
    431        {
    432            return null;
    433        }
    434
    435        public int getLoadedChunkCount()
    436        {
    437            return 0;
    438        }
    439
    440        public void recreateStructures(int par1, int par2) {}
    441    }