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