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;
027
028public final class SpawnerAnimals
029{
030    /** The 17x17 area around the player where mobs can spawn */
031    private static HashMap eligibleChunksForSpawning = new HashMap();
032
033    /** An array of entity classes that spawn at night. */
034    protected static final Class[] nightSpawnEntities = new Class[] {EntitySpider.class, EntityZombie.class, EntitySkeleton.class};
035
036    /**
037     * Given a chunk, find a random position in it.
038     */
039    protected static ChunkPosition getRandomSpawningPointInChunk(World par0World, int par1, int par2)
040    {
041        Chunk chunk = par0World.getChunkFromChunkCoords(par1, par2);
042        int k = par1 * 16 + par0World.rand.nextInt(16);
043        int l = par2 * 16 + par0World.rand.nextInt(16);
044        int i1 = par0World.rand.nextInt(chunk == null ? par0World.getActualHeight() : chunk.getTopFilledSegment() + 16 - 1);
045        return new ChunkPosition(k, i1, l);
046    }
047
048    /**
049     * adds all chunks within the spawn radius of the players to eligibleChunksForSpawning. pars: the world,
050     * hostileCreatures, passiveCreatures. returns number of eligible chunks.
051     */
052    public static final int findChunksForSpawning(WorldServer par0WorldServer, boolean par1, boolean par2, boolean par3)
053    {
054        if (!par1 && !par2)
055        {
056            return 0;
057        }
058        else
059        {
060            eligibleChunksForSpawning.clear();
061            int i;
062            int j;
063
064            for (i = 0; i < par0WorldServer.playerEntities.size(); ++i)
065            {
066                EntityPlayer entityplayer = (EntityPlayer)par0WorldServer.playerEntities.get(i);
067                int k = MathHelper.floor_double(entityplayer.posX / 16.0D);
068                j = MathHelper.floor_double(entityplayer.posZ / 16.0D);
069                byte b0 = 8;
070
071                for (int l = -b0; l <= b0; ++l)
072                {
073                    for (int i1 = -b0; i1 <= b0; ++i1)
074                    {
075                        boolean flag3 = l == -b0 || l == b0 || i1 == -b0 || i1 == b0;
076                        ChunkCoordIntPair chunkcoordintpair = new ChunkCoordIntPair(l + k, i1 + j);
077
078                        if (!flag3)
079                        {
080                            eligibleChunksForSpawning.put(chunkcoordintpair, Boolean.valueOf(false));
081                        }
082                        else if (!eligibleChunksForSpawning.containsKey(chunkcoordintpair))
083                        {
084                            eligibleChunksForSpawning.put(chunkcoordintpair, Boolean.valueOf(true));
085                        }
086                    }
087                }
088            }
089
090            i = 0;
091            ChunkCoordinates chunkcoordinates = par0WorldServer.getSpawnPoint();
092            EnumCreatureType[] aenumcreaturetype = EnumCreatureType.values();
093            j = aenumcreaturetype.length;
094
095            for (int j1 = 0; j1 < j; ++j1)
096            {
097                EnumCreatureType enumcreaturetype = aenumcreaturetype[j1];
098
099                if ((!enumcreaturetype.getPeacefulCreature() || par2) && (enumcreaturetype.getPeacefulCreature() || par1) && (!enumcreaturetype.getAnimal() || par3) && par0WorldServer.countEntities(enumcreaturetype.getCreatureClass()) <= enumcreaturetype.getMaxNumberOfCreature() * eligibleChunksForSpawning.size() / 256)
100                {
101                    Iterator iterator = eligibleChunksForSpawning.keySet().iterator();
102                    ArrayList<ChunkCoordIntPair> tmp = new ArrayList(eligibleChunksForSpawning.keySet());
103                    Collections.shuffle(tmp);
104                    iterator = tmp.iterator();
105                    label110:
106
107                    while (iterator.hasNext())
108                    {
109                        ChunkCoordIntPair chunkcoordintpair1 = (ChunkCoordIntPair)iterator.next();
110
111                        if (!((Boolean)eligibleChunksForSpawning.get(chunkcoordintpair1)).booleanValue())
112                        {
113                            ChunkPosition chunkposition = getRandomSpawningPointInChunk(par0WorldServer, chunkcoordintpair1.chunkXPos, chunkcoordintpair1.chunkZPos);
114                            int k1 = chunkposition.x;
115                            int l1 = chunkposition.y;
116                            int i2 = chunkposition.z;
117
118                            if (!par0WorldServer.isBlockNormalCube(k1, l1, i2) && par0WorldServer.getBlockMaterial(k1, l1, i2) == enumcreaturetype.getCreatureMaterial())
119                            {
120                                int j2 = 0;
121                                int k2 = 0;
122
123                                while (k2 < 3)
124                                {
125                                    int l2 = k1;
126                                    int i3 = l1;
127                                    int j3 = i2;
128                                    byte b1 = 6;
129                                    SpawnListEntry spawnlistentry = null;
130                                    int k3 = 0;
131
132                                    while (true)
133                                    {
134                                        if (k3 < 4)
135                                        {
136                                            label103:
137                                            {
138                                                l2 += par0WorldServer.rand.nextInt(b1) - par0WorldServer.rand.nextInt(b1);
139                                                i3 += par0WorldServer.rand.nextInt(1) - par0WorldServer.rand.nextInt(1);
140                                                j3 += par0WorldServer.rand.nextInt(b1) - par0WorldServer.rand.nextInt(b1);
141
142                                                if (canCreatureTypeSpawnAtLocation(enumcreaturetype, par0WorldServer, l2, i3, j3))
143                                                {
144                                                    float f = (float)l2 + 0.5F;
145                                                    float f1 = (float)i3;
146                                                    float f2 = (float)j3 + 0.5F;
147
148                                                    if (par0WorldServer.getClosestPlayer((double)f, (double)f1, (double)f2, 24.0D) == null)
149                                                    {
150                                                        float f3 = f - (float)chunkcoordinates.posX;
151                                                        float f4 = f1 - (float)chunkcoordinates.posY;
152                                                        float f5 = f2 - (float)chunkcoordinates.posZ;
153                                                        float f6 = f3 * f3 + f4 * f4 + f5 * f5;
154
155                                                        if (f6 >= 576.0F)
156                                                        {
157                                                            if (spawnlistentry == null)
158                                                            {
159                                                                spawnlistentry = par0WorldServer.spawnRandomCreature(enumcreaturetype, l2, i3, j3);
160
161                                                                if (spawnlistentry == null)
162                                                                {
163                                                                    break label103;
164                                                                }
165                                                            }
166
167                                                            EntityLiving entityliving;
168
169                                                            try
170                                                            {
171                                                                entityliving = (EntityLiving)spawnlistentry.entityClass.getConstructor(new Class[] {World.class}).newInstance(new Object[] {par0WorldServer});
172                                                            }
173                                                            catch (Exception exception)
174                                                            {
175                                                                exception.printStackTrace();
176                                                                return i;
177                                                            }
178
179                                                            entityliving.setLocationAndAngles((double)f, (double)f1, (double)f2, par0WorldServer.rand.nextFloat() * 360.0F, 0.0F);
180
181                                                            Result canSpawn = ForgeEventFactory.canEntitySpawn(entityliving, par0WorldServer, f, f1, f2);
182                                                            if (canSpawn == Result.ALLOW || (canSpawn == Result.DEFAULT && entityliving.getCanSpawnHere()))
183                                                            {
184                                                                ++j2;
185                                                                par0WorldServer.spawnEntityInWorld(entityliving);
186                                                                creatureSpecificInit(entityliving, par0WorldServer, f, f1, f2);
187
188                                                                if (j2 >= entityliving.getMaxSpawnedInChunk())
189                                                                {
190                                                                    continue label110;
191                                                                }
192                                                            }
193
194                                                            i += j2;
195                                                        }
196                                                    }
197                                                }
198
199                                                ++k3;
200                                                continue;
201                                            }
202                                        }
203
204                                        ++k2;
205                                        break;
206                                    }
207                                }
208                            }
209                        }
210                    }
211                }
212            }
213
214            return i;
215        }
216    }
217
218    /**
219     * Returns whether or not the specified creature type can spawn at the specified location.
220     */
221    public static boolean canCreatureTypeSpawnAtLocation(EnumCreatureType par0EnumCreatureType, World par1World, int par2, int par3, int par4)
222    {
223        if (par0EnumCreatureType.getCreatureMaterial() == Material.water)
224        {
225            return par1World.getBlockMaterial(par2, par3, par4).isLiquid() && par1World.getBlockMaterial(par2, par3 - 1, par4).isLiquid() && !par1World.isBlockNormalCube(par2, par3 + 1, par4);
226        }
227        else if (!par1World.doesBlockHaveSolidTopSurface(par2, par3 - 1, par4))
228        {
229            return false;
230        }
231        else
232        {
233            int l = par1World.getBlockId(par2, par3 - 1, par4);
234            boolean spawnBlock = (Block.blocksList[l] != null && Block.blocksList[l].canCreatureSpawn(par0EnumCreatureType, par1World, par2, par3 - 1, par4));
235            return spawnBlock && l != Block.bedrock.blockID && !par1World.isBlockNormalCube(par2, par3, par4) && !par1World.getBlockMaterial(par2, par3, par4).isLiquid() && !par1World.isBlockNormalCube(par2, par3 + 1, par4);
236        }
237    }
238
239    /**
240     * determines if a skeleton spawns on a spider, and if a sheep is a different color
241     */
242    private static void creatureSpecificInit(EntityLiving par0EntityLiving, World par1World, float par2, float par3, float par4)
243    {
244        if (ForgeEventFactory.doSpecialSpawn(par0EntityLiving, par1World, par2, par3, par4))
245        {
246            return;
247        }
248
249        par0EntityLiving.initCreature();
250    }
251
252    /**
253     * Called during chunk generation to spawn initial creatures.
254     */
255    public static void performWorldGenSpawning(World par0World, BiomeGenBase par1BiomeGenBase, int par2, int par3, int par4, int par5, Random par6Random)
256    {
257        List list = par1BiomeGenBase.getSpawnableList(EnumCreatureType.creature);
258
259        if (!list.isEmpty())
260        {
261            while (par6Random.nextFloat() < par1BiomeGenBase.getSpawningChance())
262            {
263                SpawnListEntry spawnlistentry = (SpawnListEntry)WeightedRandom.getRandomItem(par0World.rand, list);
264                int i1 = spawnlistentry.minGroupCount + par6Random.nextInt(1 + spawnlistentry.maxGroupCount - spawnlistentry.minGroupCount);
265                int j1 = par2 + par6Random.nextInt(par4);
266                int k1 = par3 + par6Random.nextInt(par5);
267                int l1 = j1;
268                int i2 = k1;
269
270                for (int j2 = 0; j2 < i1; ++j2)
271                {
272                    boolean flag = false;
273
274                    for (int k2 = 0; !flag && k2 < 4; ++k2)
275                    {
276                        int l2 = par0World.getTopSolidOrLiquidBlock(j1, k1);
277
278                        if (canCreatureTypeSpawnAtLocation(EnumCreatureType.creature, par0World, j1, l2, k1))
279                        {
280                            float f = (float)j1 + 0.5F;
281                            float f1 = (float)l2;
282                            float f2 = (float)k1 + 0.5F;
283                            EntityLiving entityliving;
284
285                            try
286                            {
287                                entityliving = (EntityLiving)spawnlistentry.entityClass.getConstructor(new Class[] {World.class}).newInstance(new Object[] {par0World});
288                            }
289                            catch (Exception exception)
290                            {
291                                exception.printStackTrace();
292                                continue;
293                            }
294
295                            entityliving.setLocationAndAngles((double)f, (double)f1, (double)f2, par6Random.nextFloat() * 360.0F, 0.0F);
296                            par0World.spawnEntityInWorld(entityliving);
297                            creatureSpecificInit(entityliving, par0World, f, f1, f2);
298                            flag = true;
299                        }
300
301                        j1 += par6Random.nextInt(5) - par6Random.nextInt(5);
302
303                        for (k1 += par6Random.nextInt(5) - par6Random.nextInt(5); j1 < par2 || j1 >= par2 + par4 || k1 < par3 || k1 >= par3 + par4; k1 = i2 + par6Random.nextInt(5) - par6Random.nextInt(5))
304                        {
305                            j1 = l1 + par6Random.nextInt(5) - par6Random.nextInt(5);
306                        }
307                    }
308                }
309            }
310        }
311    }
312}