001    package net.minecraft.src;
002    
003    import cpw.mods.fml.common.Side;
004    import cpw.mods.fml.common.asm.SideOnly;
005    import java.util.ArrayList;
006    import java.util.List;
007    import java.util.Random;
008    
009    public class WorldChunkManager
010    {
011        private GenLayer genBiomes;
012    
013        /** A GenLayer containing the indices into BiomeGenBase.biomeList[] */
014        private GenLayer biomeIndexLayer;
015    
016        /** The BiomeCache object for this world. */
017        private BiomeCache biomeCache;
018    
019        /** A list of biomes that the player can spawn in. */
020        private List biomesToSpawnIn;
021    
022        protected WorldChunkManager()
023        {
024            this.biomeCache = new BiomeCache(this);
025            this.biomesToSpawnIn = new ArrayList();
026            this.biomesToSpawnIn.add(BiomeGenBase.forest);
027            this.biomesToSpawnIn.add(BiomeGenBase.plains);
028            this.biomesToSpawnIn.add(BiomeGenBase.taiga);
029            this.biomesToSpawnIn.add(BiomeGenBase.taigaHills);
030            this.biomesToSpawnIn.add(BiomeGenBase.forestHills);
031            this.biomesToSpawnIn.add(BiomeGenBase.jungle);
032            this.biomesToSpawnIn.add(BiomeGenBase.jungleHills);
033        }
034    
035        public WorldChunkManager(long par1, WorldType par3WorldType)
036        {
037            this();
038            GenLayer[] var4 = GenLayer.initializeAllBiomeGenerators(par1, par3WorldType);
039            this.genBiomes = var4[0];
040            this.biomeIndexLayer = var4[1];
041        }
042    
043        public WorldChunkManager(World par1World)
044        {
045            this(par1World.getSeed(), par1World.getWorldInfo().getTerrainType());
046        }
047    
048        /**
049         * Gets the list of valid biomes for the player to spawn in.
050         */
051        public List getBiomesToSpawnIn()
052        {
053            return this.biomesToSpawnIn;
054        }
055    
056        /**
057         * Returns the BiomeGenBase related to the x, z position on the world.
058         */
059        public BiomeGenBase getBiomeGenAt(int par1, int par2)
060        {
061            return this.biomeCache.getBiomeGenAt(par1, par2);
062        }
063    
064        /**
065         * Returns a list of rainfall values for the specified blocks. Args: listToReuse, x, z, width, length.
066         */
067        public float[] getRainfall(float[] par1ArrayOfFloat, int par2, int par3, int par4, int par5)
068        {
069            IntCache.resetIntCache();
070    
071            if (par1ArrayOfFloat == null || par1ArrayOfFloat.length < par4 * par5)
072            {
073                par1ArrayOfFloat = new float[par4 * par5];
074            }
075    
076            int[] var6 = this.biomeIndexLayer.getInts(par2, par3, par4, par5);
077    
078            for (int var7 = 0; var7 < par4 * par5; ++var7)
079            {
080                float var8 = (float)BiomeGenBase.biomeList[var6[var7]].getIntRainfall() / 65536.0F;
081    
082                if (var8 > 1.0F)
083                {
084                    var8 = 1.0F;
085                }
086    
087                par1ArrayOfFloat[var7] = var8;
088            }
089    
090            return par1ArrayOfFloat;
091        }
092    
093        @SideOnly(Side.CLIENT)
094    
095        /**
096         * Return an adjusted version of a given temperature based on the y height
097         */
098        public float getTemperatureAtHeight(float par1, int par2)
099        {
100            return par1;
101        }
102    
103        /**
104         * Returns a list of temperatures to use for the specified blocks.  Args: listToReuse, x, y, width, length
105         */
106        public float[] getTemperatures(float[] par1ArrayOfFloat, int par2, int par3, int par4, int par5)
107        {
108            IntCache.resetIntCache();
109    
110            if (par1ArrayOfFloat == null || par1ArrayOfFloat.length < par4 * par5)
111            {
112                par1ArrayOfFloat = new float[par4 * par5];
113            }
114    
115            int[] var6 = this.biomeIndexLayer.getInts(par2, par3, par4, par5);
116    
117            for (int var7 = 0; var7 < par4 * par5; ++var7)
118            {
119                float var8 = (float)BiomeGenBase.biomeList[var6[var7]].getIntTemperature() / 65536.0F;
120    
121                if (var8 > 1.0F)
122                {
123                    var8 = 1.0F;
124                }
125    
126                par1ArrayOfFloat[var7] = var8;
127            }
128    
129            return par1ArrayOfFloat;
130        }
131    
132        /**
133         * Returns an array of biomes for the location input.
134         */
135        public BiomeGenBase[] getBiomesForGeneration(BiomeGenBase[] par1ArrayOfBiomeGenBase, int par2, int par3, int par4, int par5)
136        {
137            IntCache.resetIntCache();
138    
139            if (par1ArrayOfBiomeGenBase == null || par1ArrayOfBiomeGenBase.length < par4 * par5)
140            {
141                par1ArrayOfBiomeGenBase = new BiomeGenBase[par4 * par5];
142            }
143    
144            int[] var6 = this.genBiomes.getInts(par2, par3, par4, par5);
145    
146            for (int var7 = 0; var7 < par4 * par5; ++var7)
147            {
148                par1ArrayOfBiomeGenBase[var7] = BiomeGenBase.biomeList[var6[var7]];
149            }
150    
151            return par1ArrayOfBiomeGenBase;
152        }
153    
154        /**
155         * Returns biomes to use for the blocks and loads the other data like temperature and humidity onto the
156         * WorldChunkManager Args: oldBiomeList, x, z, width, depth
157         */
158        public BiomeGenBase[] loadBlockGeneratorData(BiomeGenBase[] par1ArrayOfBiomeGenBase, int par2, int par3, int par4, int par5)
159        {
160            return this.getBiomeGenAt(par1ArrayOfBiomeGenBase, par2, par3, par4, par5, true);
161        }
162    
163        /**
164         * Return a list of biomes for the specified blocks. Args: listToReuse, x, y, width, length, cacheFlag (if false,
165         * don't check biomeCache to avoid infinite loop in BiomeCacheBlock)
166         */
167        public BiomeGenBase[] getBiomeGenAt(BiomeGenBase[] par1ArrayOfBiomeGenBase, int par2, int par3, int par4, int par5, boolean par6)
168        {
169            IntCache.resetIntCache();
170    
171            if (par1ArrayOfBiomeGenBase == null || par1ArrayOfBiomeGenBase.length < par4 * par5)
172            {
173                par1ArrayOfBiomeGenBase = new BiomeGenBase[par4 * par5];
174            }
175    
176            if (par6 && par4 == 16 && par5 == 16 && (par2 & 15) == 0 && (par3 & 15) == 0)
177            {
178                BiomeGenBase[] var9 = this.biomeCache.getCachedBiomes(par2, par3);
179                System.arraycopy(var9, 0, par1ArrayOfBiomeGenBase, 0, par4 * par5);
180                return par1ArrayOfBiomeGenBase;
181            }
182            else
183            {
184                int[] var7 = this.biomeIndexLayer.getInts(par2, par3, par4, par5);
185    
186                for (int var8 = 0; var8 < par4 * par5; ++var8)
187                {
188                    par1ArrayOfBiomeGenBase[var8] = BiomeGenBase.biomeList[var7[var8]];
189                }
190    
191                return par1ArrayOfBiomeGenBase;
192            }
193        }
194    
195        /**
196         * checks given Chunk's Biomes against List of allowed ones
197         */
198        public boolean areBiomesViable(int par1, int par2, int par3, List par4List)
199        {
200            int var5 = par1 - par3 >> 2;
201            int var6 = par2 - par3 >> 2;
202            int var7 = par1 + par3 >> 2;
203            int var8 = par2 + par3 >> 2;
204            int var9 = var7 - var5 + 1;
205            int var10 = var8 - var6 + 1;
206            int[] var11 = this.genBiomes.getInts(var5, var6, var9, var10);
207    
208            for (int var12 = 0; var12 < var9 * var10; ++var12)
209            {
210                BiomeGenBase var13 = BiomeGenBase.biomeList[var11[var12]];
211    
212                if (!par4List.contains(var13))
213                {
214                    return false;
215                }
216            }
217    
218            return true;
219        }
220    
221        /**
222         * Finds a valid position within a range, that is in one of the listed biomes. Searches {par1,par2} +-par3 blocks.
223         * Strongly favors positive y positions.
224         */
225        public ChunkPosition findBiomePosition(int par1, int par2, int par3, List par4List, Random par5Random)
226        {
227            int var6 = par1 - par3 >> 2;
228            int var7 = par2 - par3 >> 2;
229            int var8 = par1 + par3 >> 2;
230            int var9 = par2 + par3 >> 2;
231            int var10 = var8 - var6 + 1;
232            int var11 = var9 - var7 + 1;
233            int[] var12 = this.genBiomes.getInts(var6, var7, var10, var11);
234            ChunkPosition var13 = null;
235            int var14 = 0;
236    
237            for (int var15 = 0; var15 < var12.length; ++var15)
238            {
239                int var16 = var6 + var15 % var10 << 2;
240                int var17 = var7 + var15 / var10 << 2;
241                BiomeGenBase var18 = BiomeGenBase.biomeList[var12[var15]];
242    
243                if (par4List.contains(var18) && (var13 == null || par5Random.nextInt(var14 + 1) == 0))
244                {
245                    var13 = new ChunkPosition(var16, 0, var17);
246                    ++var14;
247                }
248            }
249    
250            return var13;
251        }
252    
253        /**
254         * Calls the WorldChunkManager's biomeCache.cleanupCache()
255         */
256        public void cleanupCache()
257        {
258            this.biomeCache.cleanupCache();
259        }
260    }