001 package net.minecraft.world;
002
003 import java.util.ArrayList;
004 import java.util.Collections;
005 import java.util.HashMap;
006 import java.util.Iterator;
007 import java.util.List;
008 import java.util.Random;
009 import net.minecraft.block.Block;
010 import net.minecraft.block.material.Material;
011 import net.minecraft.entity.EntityLiving;
012 import net.minecraft.entity.EnumCreatureType;
013 import net.minecraft.entity.monster.EntitySkeleton;
014 import net.minecraft.entity.monster.EntitySpider;
015 import net.minecraft.entity.monster.EntityZombie;
016 import net.minecraft.entity.player.EntityPlayer;
017 import net.minecraft.util.ChunkCoordinates;
018 import net.minecraft.util.MathHelper;
019 import net.minecraft.util.WeightedRandom;
020 import net.minecraft.world.biome.BiomeGenBase;
021 import net.minecraft.world.biome.SpawnListEntry;
022 import net.minecraft.world.chunk.Chunk;
023
024 import net.minecraftforge.common.MinecraftForge;
025 import net.minecraftforge.event.Event.Result;
026 import net.minecraftforge.event.ForgeEventFactory;
027 import net.minecraftforge.event.entity.living.LivingSpecialSpawnEvent;
028
029 public 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 }