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 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}