    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.util.MathHelper;
    010import net.minecraft.world.ChunkPosition;
    011import net.minecraft.world.World;
    012import net.minecraft.world.biome.BiomeGenBase;
    013import net.minecraft.world.chunk.Chunk;
    014import net.minecraft.world.chunk.IChunkProvider;
    015
    016import net.minecraftforge.common.*;
    017import net.minecraftforge.event.Event.*;
    018import net.minecraftforge.event.terraingen.*;
    019
    020public 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 b0 = 2;
    062        int k = b0 + 1;
    063        byte b1 = 33;
    064        int l = b0 + 1;
    065        this.densities = this.initializeNoiseField(this.densities, par1 * b0, 0, par2 * b0, k, b1, l);
    066
    067        for (int i1 = 0; i1 < b0; ++i1)
    068        {
    069            for (int j1 = 0; j1 < b0; ++j1)
    070            {
    071                for (int k1 = 0; k1 < 32; ++k1)
    072                {
    073                    double d0 = 0.25D;
    074                    double d1 = this.densities[((i1 + 0) * l + j1 + 0) * b1 + k1 + 0];
    075                    double d2 = this.densities[((i1 + 0) * l + j1 + 1) * b1 + k1 + 0];
    076                    double d3 = this.densities[((i1 + 1) * l + j1 + 0) * b1 + k1 + 0];
    077                    double d4 = this.densities[((i1 + 1) * l + j1 + 1) * b1 + k1 + 0];
    078                    double d5 = (this.densities[((i1 + 0) * l + j1 + 0) * b1 + k1 + 1] - d1) * d0;
    079                    double d6 = (this.densities[((i1 + 0) * l + j1 + 1) * b1 + k1 + 1] - d2) * d0;
    080                    double d7 = (this.densities[((i1 + 1) * l + j1 + 0) * b1 + k1 + 1] - d3) * d0;
    081                    double d8 = (this.densities[((i1 + 1) * l + j1 + 1) * b1 + k1 + 1] - d4) * d0;
    082
    083                    for (int l1 = 0; l1 < 4; ++l1)
    084                    {
    085                        double d9 = 0.125D;
    086                        double d10 = d1;
    087                        double d11 = d2;
    088                        double d12 = (d3 - d1) * d9;
    089                        double d13 = (d4 - d2) * d9;
    090
    091                        for (int i2 = 0; i2 < 8; ++i2)
    092                        {
    093                            int j2 = i2 + i1 * 8 << 11 | 0 + j1 * 8 << 7 | k1 * 4 + l1;
    094                            short short1 = 128;
    095                            double d14 = 0.125D;
    096                            double d15 = d10;
    097                            double d16 = (d11 - d10) * d14;
    098
    099                            for (int k2 = 0; k2 < 8; ++k2)
    100                            {
    101                                int l2 = 0;
    102
    103                                if (d15 > 0.0D)
    104                                {
    105                                    l2 = Block.whiteStone.blockID;
    106                                }
    107
    108                                par3ArrayOfByte[j2] = (byte)l2;
    109                                j2 += short1;
    110                                d15 += d16;
    111                            }
    112
    113                            d10 += d12;
    114                            d11 += d13;
    115                        }
    116
    117                        d1 += d5;
    118                        d2 += d6;
    119                        d3 += d7;
    120                        d4 += d8;
    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 k = 0; k < 16; ++k)
    134        {
    135            for (int l = 0; l < 16; ++l)
    136            {
    137                byte b0 = 1;
    138                int i1 = -1;
    139                byte b1 = (byte)Block.whiteStone.blockID;
    140                byte b2 = (byte)Block.whiteStone.blockID;
    141
    142                for (int j1 = 127; j1 >= 0; --j1)
    143                {
    144                    int k1 = (l * 16 + k) * 128 + j1;
    145                    byte b3 = par3ArrayOfByte[k1];
    146
    147                    if (b3 == 0)
    148                    {
    149                        i1 = -1;
    150                    }
    151                    else if (b3 == Block.stone.blockID)
    152                    {
    153                        if (i1 == -1)
    154                        {
    155                            if (b0 <= 0)
    156                            {
    157                                b1 = 0;
    158                                b2 = (byte)Block.whiteStone.blockID;
    159                            }
    160
    161                            i1 = b0;
    162
    163                            if (j1 >= 0)
    164                            {
    165                                par3ArrayOfByte[k1] = b1;
    166                            }
    167                            else
    168                            {
    169                                par3ArrayOfByte[k1] = b2;
    170                            }
    171                        }
    172                        else if (i1 > 0)
    173                        {
    174                            --i1;
    175                            par3ArrayOfByte[k1] = b2;
    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[] abyte = new byte[32768];
    199        this.biomesForGeneration = this.endWorld.getWorldChunkManager().loadBlockGeneratorData(this.biomesForGeneration, par1 * 16, par2 * 16, 16, 16);
    200        this.generateTerrain(par1, par2, abyte, this.biomesForGeneration);
    201        this.replaceBlocksForBiome(par1, par2, abyte, this.biomesForGeneration);
    202        Chunk chunk = new Chunk(this.endWorld, abyte, par1, par2);
    203        byte[] abyte1 = chunk.getBiomeArray();
    204
    205        for (int k = 0; k < abyte1.length; ++k)
    206        {
    207            abyte1[k] = (byte)this.biomesForGeneration[k].biomeID;
    208        }
    209
    210        chunk.generateSkylightMap();
    211        return chunk;
    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 d0 = 684.412D;
    230        double d1 = 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        d0 *= 2.0D;
    234        this.noiseData1 = this.noiseGen3.generateNoiseOctaves(this.noiseData1, par2, par3, par4, par5, par6, par7, d0 / 80.0D, d1 / 160.0D, d0 / 80.0D);
    235        this.noiseData2 = this.noiseGen1.generateNoiseOctaves(this.noiseData2, par2, par3, par4, par5, par6, par7, d0, d1, d0);
    236        this.noiseData3 = this.noiseGen2.generateNoiseOctaves(this.noiseData3, par2, par3, par4, par5, par6, par7, d0, d1, d0);
    237        int k1 = 0;
    238        int l1 = 0;
    239
    240        for (int i2 = 0; i2 < par5; ++i2)
    241        {
    242            for (int j2 = 0; j2 < par7; ++j2)
    243            {
    244                double d2 = (this.noiseData4[l1] + 256.0D) / 512.0D;
    245
    246                if (d2 > 1.0D)
    247                {
    248                    d2 = 1.0D;
    249                }
    250
    251                double d3 = this.noiseData5[l1] / 8000.0D;
    252
    253                if (d3 < 0.0D)
    254                {
    255                    d3 = -d3 * 0.3D;
    256                }
    257
    258                d3 = d3 * 3.0D - 2.0D;
    259                float f = (float)(i2 + par2 - 0) / 1.0F;
    260                float f1 = (float)(j2 + par4 - 0) / 1.0F;
    261                float f2 = 100.0F - MathHelper.sqrt_float(f * f + f1 * f1) * 8.0F;
    262
    263                if (f2 > 80.0F)
    264                {
    265                    f2 = 80.0F;
    266                }
    267
    268                if (f2 < -100.0F)
    269                {
    270                    f2 = -100.0F;
    271                }
    272
    273                if (d3 > 1.0D)
    274                {
    275                    d3 = 1.0D;
    276                }
    277
    278                d3 /= 8.0D;
    279                d3 = 0.0D;
    280
    281                if (d2 < 0.0D)
    282                {
    283                    d2 = 0.0D;
    284                }
    285
    286                d2 += 0.5D;
    287                d3 = d3 * (double)par6 / 16.0D;
    288                ++l1;
    289                double d4 = (double)par6 / 2.0D;
    290
    291                for (int k2 = 0; k2 < par6; ++k2)
    292                {
    293                    double d5 = 0.0D;
    294                    double d6 = ((double)k2 - d4) * 8.0D / d2;
    295
    296                    if (d6 < 0.0D)
    297                    {
    298                        d6 *= -1.0D;
    299                    }
    300
    301                    double d7 = this.noiseData2[k1] / 512.0D;
    302                    double d8 = this.noiseData3[k1] / 512.0D;
    303                    double d9 = (this.noiseData1[k1] / 10.0D + 1.0D) / 2.0D;
    304
    305                    if (d9 < 0.0D)
    306                    {
    307                        d5 = d7;
    308                    }
    309                    else if (d9 > 1.0D)
    310                    {
    311                        d5 = d8;
    312                    }
    313                    else
    314                    {
    315                        d5 = d7 + (d8 - d7) * d9;
    316                    }
    317
    318                    d5 -= 8.0D;
    319                    d5 += (double)f2;
    320                    byte b0 = 2;
    321                    double d10;
    322
    323                    if (k2 > par6 / 2 - b0)
    324                    {
    325                        d10 = (double)((float)(k2 - (par6 / 2 - b0)) / 64.0F);
    326
    327                        if (d10 < 0.0D)
    328                        {
    329                            d10 = 0.0D;
    330                        }
    331
    332                        if (d10 > 1.0D)
    333                        {
    334                            d10 = 1.0D;
    335                        }
    336
    337                        d5 = d5 * (1.0D - d10) + -3000.0D * d10;
    338                    }
    339
    340                    b0 = 8;
    341
    342                    if (k2 < b0)
    343                    {
    344                        d10 = (double)((float)(b0 - k2) / ((float)b0 - 1.0F));
    345                        d5 = d5 * (1.0D - d10) + -30.0D * d10;
    346                    }
    347
    348                    par1ArrayOfDouble[k1] = d5;
    349                    ++k1;
    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 k = par2 * 16;
    375        int l = par3 * 16;
    376        BiomeGenBase biomegenbase = this.endWorld.getBiomeGenForCoords(k + 16, l + 16);
    377        biomegenbase.decorate(this.endWorld, this.endWorld.rand, k, l);
    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 chunks that are marked to be unloaded. This is not guaranteed to unload every such chunk.
    395     */
    396    public boolean unloadQueuedChunks()
    397    {
    398        return false;
    399    }
    400
    401    /**
    402     * Returns if the IChunkProvider supports saving.
    403     */
    404    public boolean canSave()
    405    {
    406        return true;
    407    }
    408
    409    /**
    410     * Converts the instance data to a readable string.
    411     */
    412    public String makeString()
    413    {
    414        return "RandomLevelSource";
    415    }
    416
    417    /**
    418     * Returns a list of creatures of the specified type that can spawn at the given location.
    419     */
    420    public List getPossibleCreatures(EnumCreatureType par1EnumCreatureType, int par2, int par3, int par4)
    421    {
    422        BiomeGenBase biomegenbase = this.endWorld.getBiomeGenForCoords(par2, par4);
    423        return biomegenbase == null ? null : biomegenbase.getSpawnableList(par1EnumCreatureType);
    424    }
    425
    426    /**
    427     * Returns the location of the closest structure of the specified type. If not found returns null.
    428     */
    429    public ChunkPosition findClosestStructure(World par1World, String par2Str, int par3, int par4, int par5)
    430    {
    431        return null;
    432    }
    433
    434    public int getLoadedChunkCount()
    435    {
    436        return 0;
    437    }
    438
    439    public void recreateStructures(int par1, int par2) {}
    440}