001package net.minecraft.world;
002
003import java.util.ArrayList;
004import java.util.Collections;
005import java.util.HashMap;
006import java.util.Iterator;
007import java.util.List;
008import java.util.Random;
009import net.minecraft.block.Block;
010import net.minecraft.block.material.Material;
011import net.minecraft.entity.EntityLiving;
012import net.minecraft.entity.EnumCreatureType;
013import net.minecraft.entity.monster.EntitySkeleton;
014import net.minecraft.entity.monster.EntitySpider;
015import net.minecraft.entity.monster.EntityZombie;
016import net.minecraft.entity.player.EntityPlayer;
017import net.minecraft.util.ChunkCoordinates;
018import net.minecraft.util.MathHelper;
019import net.minecraft.util.WeightedRandom;
020import net.minecraft.world.biome.BiomeGenBase;
021import net.minecraft.world.biome.SpawnListEntry;
022import net.minecraft.world.chunk.Chunk;
023
024import net.minecraftforge.common.MinecraftForge;
025import net.minecraftforge.event.Event.Result;
026import net.minecraftforge.event.ForgeEventFactory;
027import net.minecraftforge.event.entity.living.LivingSpecialSpawnEvent;
028
029public final class SpawnerAnimals
030{
031    /** The 17x17 area around the player where mobs can spawn */
032    private static HashMap eligibleChunksForSpawning = new HashMap();
033
034    /** An array of entity classes that spawn at night. */
035    protected static final Class[] nightSpawnEntities = new Class[] {EntitySpider.class, EntityZombie.class, EntitySkeleton.class};
036
037    /**
038     * Given a chunk, find a random position in it.
039     */
040    protected static ChunkPosition getRandomSpawningPointInChunk(World par0World, int par1, int par2)
041    {
042        Chunk var3 = par0World.getChunkFromChunkCoords(par1, par2);
043        int var4 = par1 * 16 + par0World.rand.nextInt(16);
044        int var5 = par2 * 16 + par0World.rand.nextInt(16);
045        int var6 = par0World.rand.nextInt(var3 == null ? par0World.getActualHeight() : var3.getTopFilledSegment() + 16 - 1);
046        return new ChunkPosition(var4, var6, var5);
047    }
048
049    /**
050     * adds all chunks within the spawn radius of the players to eligibleChunksForSpawning. pars: the world,
051     * hostileCreatures, passiveCreatures. returns number of eligible chunks.
052     */
053    public static final int findChunksForSpawning(WorldServer par0WorldServer, boolean par1, boolean par2, boolean par3)
054    {
055        if (!par1 && !par2)
056        {
057            return 0;
058        }
059        else
060        {
061            eligibleChunksForSpawning.clear();
062            int var4;
063            int var7;
064
065            for (var4 = 0; var4 < par0WorldServer.playerEntities.size(); ++var4)
066            {
067                EntityPlayer var5 = (EntityPlayer)par0WorldServer.playerEntities.get(var4);
068                int var6 = MathHelper.floor_double(var5.posX / 16.0D);
069                var7 = MathHelper.floor_double(var5.posZ / 16.0D);
070                byte var8 = 8;
071
072                for (int var9 = -var8; var9 <= var8; ++var9)
073                {
074                    for (int var10 = -var8; var10 <= var8; ++var10)
075                    {
076                        boolean var11 = var9 == -var8 || var9 == var8 || var10 == -var8 || var10 == var8;
077                        ChunkCoordIntPair var12 = new ChunkCoordIntPair(var9 + var6, var10 + var7);
078
079                        if (!var11)
080                        {
081                            eligibleChunksForSpawning.put(var12, Boolean.valueOf(false));
082                        }
083                        else if (!eligibleChunksForSpawning.containsKey(var12))
084                        {
085                            eligibleChunksForSpawning.put(var12, Boolean.valueOf(true));
086                        }
087                    }
088                }
089            }
090
091            var4 = 0;
092            ChunkCoordinates var32 = par0WorldServer.getSpawnPoint();
093            EnumCreatureType[] var33 = EnumCreatureType.values();
094            var7 = var33.length;
095
096            for (int var34 = 0; var34 < var7; ++var34)
097            {
098                EnumCreatureType var35 = var33[var34];
099
100                if ((!var35.getPeacefulCreature() || par2) && (var35.getPeacefulCreature() || par1) && (!var35.getAnimal() || par3) && par0WorldServer.countEntities(var35.getCreatureClass()) <= var35.getMaxNumberOfCreature() * eligibleChunksForSpawning.size() / 256)
101                {
102                    Iterator var37 = eligibleChunksForSpawning.keySet().iterator();
103                    ArrayList<ChunkCoordIntPair> tmp = new ArrayList(eligibleChunksForSpawning.keySet());
104                    Collections.shuffle(tmp);
105                    var37 = tmp.iterator();
106                    label110:
107
108                    while (var37.hasNext())
109                    {
110                        ChunkCoordIntPair var36 = (ChunkCoordIntPair)var37.next();
111
112                        if (!((Boolean)eligibleChunksForSpawning.get(var36)).booleanValue())
113                        {
114                            ChunkPosition var38 = getRandomSpawningPointInChunk(par0WorldServer, var36.chunkXPos, var36.chunkZPos);
115                            int var13 = var38.x;
116                            int var14 = var38.y;
117                            int var15 = var38.z;
118
119                            if (!par0WorldServer.isBlockNormalCube(var13, var14, var15) && par0WorldServer.getBlockMaterial(var13, var14, var15) == var35.getCreatureMaterial())
120                            {
121                                int var16 = 0;
122                                int var17 = 0;
123
124                                while (var17 < 3)
125                                {
126                                    int var18 = var13;
127                                    int var19 = var14;
128                                    int var20 = var15;
129                                    byte var21 = 6;
130                                    SpawnListEntry var22 = null;
131                                    int var23 = 0;
132
133                                    while (true)
134                                    {
135                                        if (var23 < 4)
136                                        {
137                                            label103:
138                                            {
139                                                var18 += par0WorldServer.rand.nextInt(var21) - par0WorldServer.rand.nextInt(var21);
140                                                var19 += par0WorldServer.rand.nextInt(1) - par0WorldServer.rand.nextInt(1);
141                                                var20 += par0WorldServer.rand.nextInt(var21) - par0WorldServer.rand.nextInt(var21);
142
143                                                if (canCreatureTypeSpawnAtLocation(var35, par0WorldServer, var18, var19, var20))
144                                                {
145                                                    float var24 = (float)var18 + 0.5F;
146                                                    float var25 = (float)var19;
147                                                    float var26 = (float)var20 + 0.5F;
148
149                                                    if (par0WorldServer.getClosestPlayer((double)var24, (double)var25, (double)var26, 24.0D) == null)
150                                                    {
151                                                        float var27 = var24 - (float)var32.posX;
152                                                        float var28 = var25 - (float)var32.posY;
153                                                        float var29 = var26 - (float)var32.posZ;
154                                                        float var30 = var27 * var27 + var28 * var28 + var29 * var29;
155
156                                                        if (var30 >= 576.0F)
157                                                        {
158                                                            if (var22 == null)
159                                                            {
160                                                                var22 = par0WorldServer.spawnRandomCreature(var35, var18, var19, var20);
161
162                                                                if (var22 == null)
163                                                                {
164                                                                    break label103;
165                                                                }
166                                                            }
167
168                                                            EntityLiving var39;
169
170                                                            try
171                                                            {
172                                                                var39 = (EntityLiving)var22.entityClass.getConstructor(new Class[] {World.class}).newInstance(new Object[] {par0WorldServer});
173                                                            }
174                                                            catch (Exception var31)
175                                                            {
176                                                                var31.printStackTrace();
177                                                                return var4;
178                                                            }
179
180                                                            var39.setLocationAndAngles((double)var24, (double)var25, (double)var26, par0WorldServer.rand.nextFloat() * 360.0F, 0.0F);
181
182                                                            Result canSpawn = ForgeEventFactory.canEntitySpawn(var39, par0WorldServer, var24, var25, var26);
183                                                            if (canSpawn == Result.ALLOW || (canSpawn == Result.DEFAULT && var39.getCanSpawnHere()))
184                                                            {
185                                                                ++var16;
186                                                                par0WorldServer.spawnEntityInWorld(var39);
187                                                                creatureSpecificInit(var39, par0WorldServer, var24, var25, var26);
188
189                                                                if (var16 >= var39.getMaxSpawnedInChunk())
190                                                                {
191                                                                    continue label110;
192                                                                }
193                                                            }
194
195                                                            var4 += var16;
196                                                        }
197                                                    }
198                                                }
199
200                                                ++var23;
201                                                continue;
202                                            }
203                                        }
204
205                                        ++var17;
206                                        break;
207                                    }
208                                }
209                            }
210                        }
211                    }
212                }
213            }
214
215            return var4;
216        }
217    }
218
219    /**
220     * Returns whether or not the specified creature type can spawn at the specified location.
221     */
222    public static boolean canCreatureTypeSpawnAtLocation(EnumCreatureType par0EnumCreatureType, World par1World, int par2, int par3, int par4)
223    {
224        if (par0EnumCreatureType.getCreatureMaterial() == Material.water)
225        {
226            return par1World.getBlockMaterial(par2, par3, par4).isLiquid() && par1World.getBlockMaterial(par2, par3 - 1, par4).isLiquid() && !par1World.isBlockNormalCube(par2, par3 + 1, par4);
227        }
228        else if (!par1World.doesBlockHaveSolidTopSurface(par2, par3 - 1, par4))
229        {
230            return false;
231        }
232        else
233        {
234            int var5 = par1World.getBlockId(par2, par3 - 1, par4);
235            boolean spawnBlock = (Block.blocksList[var5] != null && Block.blocksList[var5].canCreatureSpawn(par0EnumCreatureType, par1World, par2, par3 - 1, par4));
236            return spawnBlock && var5 != Block.bedrock.blockID && !par1World.isBlockNormalCube(par2, par3, par4) && !par1World.getBlockMaterial(par2, par3, par4).isLiquid() && !par1World.isBlockNormalCube(par2, par3 + 1, par4);
237        }
238    }
239
240    /**
241     * determines if a skeleton spawns on a spider, and if a sheep is a different color
242     */
243    private static void creatureSpecificInit(EntityLiving par0EntityLiving, World par1World, float par2, float par3, float par4)
244    {
245        if (ForgeEventFactory.doSpecialSpawn(par0EntityLiving, par1World, par2, par3, par4))
246        {
247            return;
248        }
249
250        par0EntityLiving.initCreature();
251    }
252
253    /**
254     * Called during chunk generation to spawn initial creatures.
255     */
256    public static void performWorldGenSpawning(World par0World, BiomeGenBase par1BiomeGenBase, int par2, int par3, int par4, int par5, Random par6Random)
257    {
258        List var7 = par1BiomeGenBase.getSpawnableList(EnumCreatureType.creature);
259
260        if (!var7.isEmpty())
261        {
262            while (par6Random.nextFloat() < par1BiomeGenBase.getSpawningChance())
263            {
264                SpawnListEntry var8 = (SpawnListEntry)WeightedRandom.getRandomItem(par0World.rand, var7);
265                int var9 = var8.minGroupCount + par6Random.nextInt(1 + var8.maxGroupCount - var8.minGroupCount);
266                int var10 = par2 + par6Random.nextInt(par4);
267                int var11 = par3 + par6Random.nextInt(par5);
268                int var12 = var10;
269                int var13 = var11;
270
271                for (int var14 = 0; var14 < var9; ++var14)
272                {
273                    boolean var15 = false;
274
275                    for (int var16 = 0; !var15 && var16 < 4; ++var16)
276                    {
277                        int var17 = par0World.getTopSolidOrLiquidBlock(var10, var11);
278
279                        if (canCreatureTypeSpawnAtLocation(EnumCreatureType.creature, par0World, var10, var17, var11))
280                        {
281                            float var18 = (float)var10 + 0.5F;
282                            float var19 = (float)var17;
283                            float var20 = (float)var11 + 0.5F;
284                            EntityLiving var21;
285
286                            try
287                            {
288                                var21 = (EntityLiving)var8.entityClass.getConstructor(new Class[] {World.class}).newInstance(new Object[] {par0World});
289                            }
290                            catch (Exception var23)
291                            {
292                                var23.printStackTrace();
293                                continue;
294                            }
295
296                            var21.setLocationAndAngles((double)var18, (double)var19, (double)var20, par6Random.nextFloat() * 360.0F, 0.0F);
297                            par0World.spawnEntityInWorld(var21);
298                            creatureSpecificInit(var21, par0World, var18, var19, var20);
299                            var15 = true;
300                        }
301
302                        var10 += par6Random.nextInt(5) - par6Random.nextInt(5);
303
304                        for (var11 += par6Random.nextInt(5) - par6Random.nextInt(5); var10 < par2 || var10 >= par2 + par4 || var11 < par3 || var11 >= par3 + par4; var11 = var13 + par6Random.nextInt(5) - par6Random.nextInt(5))
305                        {
306                            var10 = var12 + par6Random.nextInt(5) - par6Random.nextInt(5);
307                        }
308                    }
309                }
310            }
311        }
312    }
313}