001package net.minecraft.entity;
002
003import java.util.HashSet;
004import java.util.Iterator;
005import java.util.List;
006import java.util.Set;
007
008import cpw.mods.fml.common.network.FMLNetworkHandler;
009import net.minecraft.entity.boss.EntityDragon;
010import net.minecraft.entity.item.EntityBoat;
011import net.minecraft.entity.item.EntityEnderCrystal;
012import net.minecraft.entity.item.EntityEnderEye;
013import net.minecraft.entity.item.EntityEnderPearl;
014import net.minecraft.entity.item.EntityExpBottle;
015import net.minecraft.entity.item.EntityFallingSand;
016import net.minecraft.entity.item.EntityFireworkRocket;
017import net.minecraft.entity.item.EntityItem;
018import net.minecraft.entity.item.EntityItemFrame;
019import net.minecraft.entity.item.EntityMinecart;
020import net.minecraft.entity.item.EntityPainting;
021import net.minecraft.entity.item.EntityTNTPrimed;
022import net.minecraft.entity.item.EntityXPOrb;
023import net.minecraft.entity.passive.IAnimals;
024import net.minecraft.entity.player.EntityPlayer;
025import net.minecraft.entity.player.EntityPlayerMP;
026import net.minecraft.entity.projectile.EntityArrow;
027import net.minecraft.entity.projectile.EntityEgg;
028import net.minecraft.entity.projectile.EntityFireball;
029import net.minecraft.entity.projectile.EntityFishHook;
030import net.minecraft.entity.projectile.EntityPotion;
031import net.minecraft.entity.projectile.EntitySmallFireball;
032import net.minecraft.entity.projectile.EntitySnowball;
033import net.minecraft.entity.projectile.EntityWitherSkull;
034import net.minecraft.item.Item;
035import net.minecraft.item.ItemMap;
036import net.minecraft.item.ItemStack;
037import net.minecraft.network.packet.Packet;
038import net.minecraft.network.packet.Packet17Sleep;
039import net.minecraft.network.packet.Packet20NamedEntitySpawn;
040import net.minecraft.network.packet.Packet23VehicleSpawn;
041import net.minecraft.network.packet.Packet24MobSpawn;
042import net.minecraft.network.packet.Packet25EntityPainting;
043import net.minecraft.network.packet.Packet26EntityExpOrb;
044import net.minecraft.network.packet.Packet28EntityVelocity;
045import net.minecraft.network.packet.Packet31RelEntityMove;
046import net.minecraft.network.packet.Packet32EntityLook;
047import net.minecraft.network.packet.Packet33RelEntityMoveLook;
048import net.minecraft.network.packet.Packet34EntityTeleport;
049import net.minecraft.network.packet.Packet35EntityHeadRotation;
050import net.minecraft.network.packet.Packet39AttachEntity;
051import net.minecraft.network.packet.Packet40EntityMetadata;
052import net.minecraft.network.packet.Packet41EntityEffect;
053import net.minecraft.network.packet.Packet5PlayerInventory;
054import net.minecraft.potion.PotionEffect;
055import net.minecraft.util.MathHelper;
056import net.minecraft.world.storage.MapData;
057
058public class EntityTrackerEntry
059{
060    public Entity myEntity;
061    public int blocksDistanceThreshold;
062
063    /** check for sync when ticks % updateFrequency==0 */
064    public int updateFrequency;
065    public int lastScaledXPosition;
066    public int lastScaledYPosition;
067    public int lastScaledZPosition;
068    public int lastYaw;
069    public int lastPitch;
070    public int lastHeadMotion;
071    public double motionX;
072    public double motionY;
073    public double motionZ;
074    public int ticks = 0;
075    private double posX;
076    private double posY;
077    private double posZ;
078
079    /** set to true on first sendLocationToClients */
080    private boolean isDataInitialized = false;
081    private boolean sendVelocityUpdates;
082
083    /**
084     * every 400 ticks a  full teleport packet is sent, rather than just a "move me +x" command, so that position
085     * remains fully synced.
086     */
087    private int ticksSinceLastForcedTeleport = 0;
088    private Entity field_85178_v;
089    private boolean ridingEntity = false;
090    public boolean playerEntitiesUpdated = false;
091
092    /**
093     * Holds references to all the players that are currently receiving position updates for this entity.
094     */
095    public Set trackingPlayers = new HashSet();
096
097    public EntityTrackerEntry(Entity par1Entity, int par2, int par3, boolean par4)
098    {
099        this.myEntity = par1Entity;
100        this.blocksDistanceThreshold = par2;
101        this.updateFrequency = par3;
102        this.sendVelocityUpdates = par4;
103        this.lastScaledXPosition = MathHelper.floor_double(par1Entity.posX * 32.0D);
104        this.lastScaledYPosition = MathHelper.floor_double(par1Entity.posY * 32.0D);
105        this.lastScaledZPosition = MathHelper.floor_double(par1Entity.posZ * 32.0D);
106        this.lastYaw = MathHelper.floor_float(par1Entity.rotationYaw * 256.0F / 360.0F);
107        this.lastPitch = MathHelper.floor_float(par1Entity.rotationPitch * 256.0F / 360.0F);
108        this.lastHeadMotion = MathHelper.floor_float(par1Entity.getRotationYawHead() * 256.0F / 360.0F);
109    }
110
111    public boolean equals(Object par1Obj)
112    {
113        return par1Obj instanceof EntityTrackerEntry ? ((EntityTrackerEntry)par1Obj).myEntity.entityId == this.myEntity.entityId : false;
114    }
115
116    public int hashCode()
117    {
118        return this.myEntity.entityId;
119    }
120
121    /**
122     * also sends velocity, rotation, and riding info.
123     */
124    public void sendLocationToAllClients(List par1List)
125    {
126        this.playerEntitiesUpdated = false;
127
128        if (!this.isDataInitialized || this.myEntity.getDistanceSq(this.posX, this.posY, this.posZ) > 16.0D)
129        {
130            this.posX = this.myEntity.posX;
131            this.posY = this.myEntity.posY;
132            this.posZ = this.myEntity.posZ;
133            this.isDataInitialized = true;
134            this.playerEntitiesUpdated = true;
135            this.sendEventsToPlayers(par1List);
136        }
137
138        if (this.field_85178_v != this.myEntity.ridingEntity || this.myEntity.ridingEntity != null && this.ticks % 60 == 0)
139        {
140            this.field_85178_v = this.myEntity.ridingEntity;
141            this.sendPacketToAllTrackingPlayers(new Packet39AttachEntity(this.myEntity, this.myEntity.ridingEntity));
142        }
143
144        if (this.myEntity instanceof EntityItemFrame && this.ticks % 10 == 0)
145        {
146            EntityItemFrame entityitemframe = (EntityItemFrame)this.myEntity;
147            ItemStack itemstack = entityitemframe.getDisplayedItem();
148
149            if (itemstack != null && itemstack.getItem() instanceof ItemMap)
150            {
151                MapData mapdata = Item.map.getMapData(itemstack, this.myEntity.worldObj);
152                Iterator iterator = par1List.iterator();
153
154                while (iterator.hasNext())
155                {
156                    EntityPlayer entityplayer = (EntityPlayer)iterator.next();
157                    EntityPlayerMP entityplayermp = (EntityPlayerMP)entityplayer;
158                    mapdata.updateVisiblePlayers(entityplayermp, itemstack);
159
160                    if (entityplayermp.playerNetServerHandler.packetSize() <= 5)
161                    {
162                        Packet packet = Item.map.createMapDataPacket(itemstack, this.myEntity.worldObj, entityplayermp);
163
164                        if (packet != null)
165                        {
166                            entityplayermp.playerNetServerHandler.sendPacketToPlayer(packet);
167                        }
168                    }
169                }
170            }
171
172            DataWatcher datawatcher = this.myEntity.getDataWatcher();
173
174            if (datawatcher.hasChanges())
175            {
176                this.sendPacketToAllAssociatedPlayers(new Packet40EntityMetadata(this.myEntity.entityId, datawatcher, false));
177            }
178        }
179        else if (this.ticks % this.updateFrequency == 0 || this.myEntity.isAirBorne || this.myEntity.getDataWatcher().hasChanges())
180        {
181            int i;
182            int j;
183
184            if (this.myEntity.ridingEntity == null)
185            {
186                ++this.ticksSinceLastForcedTeleport;
187                i = this.myEntity.myEntitySize.multiplyBy32AndRound(this.myEntity.posX);
188                j = MathHelper.floor_double(this.myEntity.posY * 32.0D);
189                int k = this.myEntity.myEntitySize.multiplyBy32AndRound(this.myEntity.posZ);
190                int l = MathHelper.floor_float(this.myEntity.rotationYaw * 256.0F / 360.0F);
191                int i1 = MathHelper.floor_float(this.myEntity.rotationPitch * 256.0F / 360.0F);
192                int j1 = i - this.lastScaledXPosition;
193                int k1 = j - this.lastScaledYPosition;
194                int l1 = k - this.lastScaledZPosition;
195                Object object = null;
196                boolean flag = Math.abs(j1) >= 4 || Math.abs(k1) >= 4 || Math.abs(l1) >= 4 || this.ticks % 60 == 0;
197                boolean flag1 = Math.abs(l - this.lastYaw) >= 4 || Math.abs(i1 - this.lastPitch) >= 4;
198
199                if (j1 >= -128 && j1 < 128 && k1 >= -128 && k1 < 128 && l1 >= -128 && l1 < 128 && this.ticksSinceLastForcedTeleport <= 400 && !this.ridingEntity)
200                {
201                    if (flag && flag1)
202                    {
203                        object = new Packet33RelEntityMoveLook(this.myEntity.entityId, (byte)j1, (byte)k1, (byte)l1, (byte)l, (byte)i1);
204                    }
205                    else if (flag)
206                    {
207                        object = new Packet31RelEntityMove(this.myEntity.entityId, (byte)j1, (byte)k1, (byte)l1);
208                    }
209                    else if (flag1)
210                    {
211                        object = new Packet32EntityLook(this.myEntity.entityId, (byte)l, (byte)i1);
212                    }
213                }
214                else
215                {
216                    this.ticksSinceLastForcedTeleport = 0;
217                    object = new Packet34EntityTeleport(this.myEntity.entityId, i, j, k, (byte)l, (byte)i1);
218                }
219
220                if (this.sendVelocityUpdates)
221                {
222                    double d0 = this.myEntity.motionX - this.motionX;
223                    double d1 = this.myEntity.motionY - this.motionY;
224                    double d2 = this.myEntity.motionZ - this.motionZ;
225                    double d3 = 0.02D;
226                    double d4 = d0 * d0 + d1 * d1 + d2 * d2;
227
228                    if (d4 > d3 * d3 || d4 > 0.0D && this.myEntity.motionX == 0.0D && this.myEntity.motionY == 0.0D && this.myEntity.motionZ == 0.0D)
229                    {
230                        this.motionX = this.myEntity.motionX;
231                        this.motionY = this.myEntity.motionY;
232                        this.motionZ = this.myEntity.motionZ;
233                        this.sendPacketToAllTrackingPlayers(new Packet28EntityVelocity(this.myEntity.entityId, this.motionX, this.motionY, this.motionZ));
234                    }
235                }
236
237                if (object != null)
238                {
239                    this.sendPacketToAllTrackingPlayers((Packet)object);
240                }
241
242                DataWatcher datawatcher1 = this.myEntity.getDataWatcher();
243
244                if (datawatcher1.hasChanges())
245                {
246                    this.sendPacketToAllAssociatedPlayers(new Packet40EntityMetadata(this.myEntity.entityId, datawatcher1, false));
247                }
248
249                if (flag)
250                {
251                    this.lastScaledXPosition = i;
252                    this.lastScaledYPosition = j;
253                    this.lastScaledZPosition = k;
254                }
255
256                if (flag1)
257                {
258                    this.lastYaw = l;
259                    this.lastPitch = i1;
260                }
261
262                this.ridingEntity = false;
263            }
264            else
265            {
266                i = MathHelper.floor_float(this.myEntity.rotationYaw * 256.0F / 360.0F);
267                j = MathHelper.floor_float(this.myEntity.rotationPitch * 256.0F / 360.0F);
268                boolean flag2 = Math.abs(i - this.lastYaw) >= 4 || Math.abs(j - this.lastPitch) >= 4;
269
270                if (flag2)
271                {
272                    this.sendPacketToAllTrackingPlayers(new Packet32EntityLook(this.myEntity.entityId, (byte)i, (byte)j));
273                    this.lastYaw = i;
274                    this.lastPitch = j;
275                }
276
277                this.lastScaledXPosition = this.myEntity.myEntitySize.multiplyBy32AndRound(this.myEntity.posX);
278                this.lastScaledYPosition = MathHelper.floor_double(this.myEntity.posY * 32.0D);
279                this.lastScaledZPosition = this.myEntity.myEntitySize.multiplyBy32AndRound(this.myEntity.posZ);
280                DataWatcher datawatcher2 = this.myEntity.getDataWatcher();
281
282                if (datawatcher2.hasChanges())
283                {
284                    this.sendPacketToAllAssociatedPlayers(new Packet40EntityMetadata(this.myEntity.entityId, datawatcher2, false));
285                }
286
287                this.ridingEntity = true;
288            }
289
290            i = MathHelper.floor_float(this.myEntity.getRotationYawHead() * 256.0F / 360.0F);
291
292            if (Math.abs(i - this.lastHeadMotion) >= 4)
293            {
294                this.sendPacketToAllTrackingPlayers(new Packet35EntityHeadRotation(this.myEntity.entityId, (byte)i));
295                this.lastHeadMotion = i;
296            }
297
298            this.myEntity.isAirBorne = false;
299        }
300
301        ++this.ticks;
302
303        if (this.myEntity.velocityChanged)
304        {
305            this.sendPacketToAllAssociatedPlayers(new Packet28EntityVelocity(this.myEntity));
306            this.myEntity.velocityChanged = false;
307        }
308    }
309
310    /**
311     * if this is a player, then it is not informed
312     */
313    public void sendPacketToAllTrackingPlayers(Packet par1Packet)
314    {
315        Iterator iterator = this.trackingPlayers.iterator();
316
317        while (iterator.hasNext())
318        {
319            EntityPlayerMP entityplayermp = (EntityPlayerMP)iterator.next();
320            entityplayermp.playerNetServerHandler.sendPacketToPlayer(par1Packet);
321        }
322    }
323
324    /**
325     * if this is a player, then it recieves the message also
326     */
327    public void sendPacketToAllAssociatedPlayers(Packet par1Packet)
328    {
329        this.sendPacketToAllTrackingPlayers(par1Packet);
330
331        if (this.myEntity instanceof EntityPlayerMP)
332        {
333            ((EntityPlayerMP)this.myEntity).playerNetServerHandler.sendPacketToPlayer(par1Packet);
334        }
335    }
336
337    public void informAllAssociatedPlayersOfItemDestruction()
338    {
339        Iterator iterator = this.trackingPlayers.iterator();
340
341        while (iterator.hasNext())
342        {
343            EntityPlayerMP entityplayermp = (EntityPlayerMP)iterator.next();
344            entityplayermp.destroyedItemsNetCache.add(Integer.valueOf(this.myEntity.entityId));
345        }
346    }
347
348    public void removeFromWatchingList(EntityPlayerMP par1EntityPlayerMP)
349    {
350        if (this.trackingPlayers.contains(par1EntityPlayerMP))
351        {
352            par1EntityPlayerMP.destroyedItemsNetCache.add(Integer.valueOf(this.myEntity.entityId));
353            this.trackingPlayers.remove(par1EntityPlayerMP);
354        }
355    }
356
357    /**
358     * if the player is more than the distance threshold (typically 64) then the player is removed instead
359     */
360    public void tryStartWachingThis(EntityPlayerMP par1EntityPlayerMP)
361    {
362        if (par1EntityPlayerMP != this.myEntity)
363        {
364            double d0 = par1EntityPlayerMP.posX - (double)(this.lastScaledXPosition / 32);
365            double d1 = par1EntityPlayerMP.posZ - (double)(this.lastScaledZPosition / 32);
366
367            if (d0 >= (double)(-this.blocksDistanceThreshold) && d0 <= (double)this.blocksDistanceThreshold && d1 >= (double)(-this.blocksDistanceThreshold) && d1 <= (double)this.blocksDistanceThreshold)
368            {
369                if (!this.trackingPlayers.contains(par1EntityPlayerMP) && (this.isPlayerWatchingThisChunk(par1EntityPlayerMP) || this.myEntity.field_98038_p))
370                {
371                    this.trackingPlayers.add(par1EntityPlayerMP);
372                    Packet packet = this.getPacketForThisEntity();
373                    par1EntityPlayerMP.playerNetServerHandler.sendPacketToPlayer(packet);
374
375                    if (!this.myEntity.getDataWatcher().getIsBlank())
376                    {
377                        par1EntityPlayerMP.playerNetServerHandler.sendPacketToPlayer(new Packet40EntityMetadata(this.myEntity.entityId, this.myEntity.getDataWatcher(), true));
378                    }
379
380                    this.motionX = this.myEntity.motionX;
381                    this.motionY = this.myEntity.motionY;
382                    this.motionZ = this.myEntity.motionZ;
383
384                    int posX = MathHelper.floor_double(this.myEntity.posX * 32.0D);
385                    int posY = MathHelper.floor_double(this.myEntity.posY * 32.0D);
386                    int posZ = MathHelper.floor_double(this.myEntity.posZ * 32.0D);
387                    if (posX != this.lastScaledXPosition || posY != this.lastScaledYPosition || posZ != this.lastScaledZPosition)
388                    {
389                        FMLNetworkHandler.makeEntitySpawnAdjustment(this.myEntity.entityId, par1EntityPlayerMP, this.lastScaledXPosition, this.lastScaledYPosition, this.lastScaledZPosition);
390                    }
391
392                    if (this.sendVelocityUpdates && !(packet instanceof Packet24MobSpawn))
393                    {
394                        par1EntityPlayerMP.playerNetServerHandler.sendPacketToPlayer(new Packet28EntityVelocity(this.myEntity.entityId, this.myEntity.motionX, this.myEntity.motionY, this.myEntity.motionZ));
395                    }
396
397                    if (this.myEntity.ridingEntity != null)
398                    {
399                        par1EntityPlayerMP.playerNetServerHandler.sendPacketToPlayer(new Packet39AttachEntity(this.myEntity, this.myEntity.ridingEntity));
400                    }
401
402                    if (this.myEntity instanceof EntityLiving)
403                    {
404                        for (int i = 0; i < 5; ++i)
405                        {
406                            ItemStack itemstack = ((EntityLiving)this.myEntity).getCurrentItemOrArmor(i);
407
408                            if (itemstack != null)
409                            {
410                                par1EntityPlayerMP.playerNetServerHandler.sendPacketToPlayer(new Packet5PlayerInventory(this.myEntity.entityId, i, itemstack));
411                            }
412                        }
413                    }
414
415                    if (this.myEntity instanceof EntityPlayer)
416                    {
417                        EntityPlayer entityplayer = (EntityPlayer)this.myEntity;
418
419                        if (entityplayer.isPlayerSleeping())
420                        {
421                            par1EntityPlayerMP.playerNetServerHandler.sendPacketToPlayer(new Packet17Sleep(this.myEntity, 0, MathHelper.floor_double(this.myEntity.posX), MathHelper.floor_double(this.myEntity.posY), MathHelper.floor_double(this.myEntity.posZ)));
422                        }
423                    }
424
425                    if (this.myEntity instanceof EntityLiving)
426                    {
427                        EntityLiving entityliving = (EntityLiving)this.myEntity;
428                        Iterator iterator = entityliving.getActivePotionEffects().iterator();
429
430                        while (iterator.hasNext())
431                        {
432                            PotionEffect potioneffect = (PotionEffect)iterator.next();
433                            par1EntityPlayerMP.playerNetServerHandler.sendPacketToPlayer(new Packet41EntityEffect(this.myEntity.entityId, potioneffect));
434                        }
435                    }
436                }
437            }
438            else if (this.trackingPlayers.contains(par1EntityPlayerMP))
439            {
440                this.trackingPlayers.remove(par1EntityPlayerMP);
441                par1EntityPlayerMP.destroyedItemsNetCache.add(Integer.valueOf(this.myEntity.entityId));
442            }
443        }
444    }
445
446    private boolean isPlayerWatchingThisChunk(EntityPlayerMP par1EntityPlayerMP)
447    {
448        return par1EntityPlayerMP.getServerForPlayer().getPlayerManager().isPlayerWatchingChunk(par1EntityPlayerMP, this.myEntity.chunkCoordX, this.myEntity.chunkCoordZ);
449    }
450
451    public void sendEventsToPlayers(List par1List)
452    {
453        for (int i = 0; i < par1List.size(); ++i)
454        {
455            this.tryStartWachingThis((EntityPlayerMP)par1List.get(i));
456        }
457    }
458
459    private Packet getPacketForThisEntity()
460    {
461        if (this.myEntity.isDead)
462        {
463            this.myEntity.worldObj.func_98180_V().func_98236_b("Fetching addPacket for removed entity");
464        }
465
466        Packet pkt = FMLNetworkHandler.getEntitySpawningPacket(this.myEntity);
467
468        if (pkt != null)
469        {
470            return pkt;
471        }
472
473        if (this.myEntity instanceof EntityItem)
474        {
475            return new Packet23VehicleSpawn(this.myEntity, 2, 1);
476        }
477        else if (this.myEntity instanceof EntityPlayerMP)
478        {
479            return new Packet20NamedEntitySpawn((EntityPlayer)this.myEntity);
480        }
481        else if (this.myEntity instanceof EntityMinecart)
482        {
483            EntityMinecart entityminecart = (EntityMinecart)this.myEntity;
484            return new Packet23VehicleSpawn(this.myEntity, 10, entityminecart.func_94087_l());
485        }
486        else if (this.myEntity instanceof EntityBoat)
487        {
488            return new Packet23VehicleSpawn(this.myEntity, 1);
489        }
490        else if (!(this.myEntity instanceof IAnimals) && !(this.myEntity instanceof EntityDragon))
491        {
492            if (this.myEntity instanceof EntityFishHook)
493            {
494                EntityPlayer entityplayer = ((EntityFishHook)this.myEntity).angler;
495                return new Packet23VehicleSpawn(this.myEntity, 90, entityplayer != null ? entityplayer.entityId : this.myEntity.entityId);
496            }
497            else if (this.myEntity instanceof EntityArrow)
498            {
499                Entity entity = ((EntityArrow)this.myEntity).shootingEntity;
500                return new Packet23VehicleSpawn(this.myEntity, 60, entity != null ? entity.entityId : this.myEntity.entityId);
501            }
502            else if (this.myEntity instanceof EntitySnowball)
503            {
504                return new Packet23VehicleSpawn(this.myEntity, 61);
505            }
506            else if (this.myEntity instanceof EntityPotion)
507            {
508                return new Packet23VehicleSpawn(this.myEntity, 73, ((EntityPotion)this.myEntity).getPotionDamage());
509            }
510            else if (this.myEntity instanceof EntityExpBottle)
511            {
512                return new Packet23VehicleSpawn(this.myEntity, 75);
513            }
514            else if (this.myEntity instanceof EntityEnderPearl)
515            {
516                return new Packet23VehicleSpawn(this.myEntity, 65);
517            }
518            else if (this.myEntity instanceof EntityEnderEye)
519            {
520                return new Packet23VehicleSpawn(this.myEntity, 72);
521            }
522            else if (this.myEntity instanceof EntityFireworkRocket)
523            {
524                return new Packet23VehicleSpawn(this.myEntity, 76);
525            }
526            else
527            {
528                Packet23VehicleSpawn packet23vehiclespawn;
529
530                if (this.myEntity instanceof EntityFireball)
531                {
532                    EntityFireball entityfireball = (EntityFireball)this.myEntity;
533                    packet23vehiclespawn = null;
534                    byte b0 = 63;
535
536                    if (this.myEntity instanceof EntitySmallFireball)
537                    {
538                        b0 = 64;
539                    }
540                    else if (this.myEntity instanceof EntityWitherSkull)
541                    {
542                        b0 = 66;
543                    }
544
545                    if (entityfireball.shootingEntity != null)
546                    {
547                        packet23vehiclespawn = new Packet23VehicleSpawn(this.myEntity, b0, ((EntityFireball)this.myEntity).shootingEntity.entityId);
548                    }
549                    else
550                    {
551                        packet23vehiclespawn = new Packet23VehicleSpawn(this.myEntity, b0, 0);
552                    }
553
554                    packet23vehiclespawn.speedX = (int)(entityfireball.accelerationX * 8000.0D);
555                    packet23vehiclespawn.speedY = (int)(entityfireball.accelerationY * 8000.0D);
556                    packet23vehiclespawn.speedZ = (int)(entityfireball.accelerationZ * 8000.0D);
557                    return packet23vehiclespawn;
558                }
559                else if (this.myEntity instanceof EntityEgg)
560                {
561                    return new Packet23VehicleSpawn(this.myEntity, 62);
562                }
563                else if (this.myEntity instanceof EntityTNTPrimed)
564                {
565                    return new Packet23VehicleSpawn(this.myEntity, 50);
566                }
567                else if (this.myEntity instanceof EntityEnderCrystal)
568                {
569                    return new Packet23VehicleSpawn(this.myEntity, 51);
570                }
571                else if (this.myEntity instanceof EntityFallingSand)
572                {
573                    EntityFallingSand entityfallingsand = (EntityFallingSand)this.myEntity;
574                    return new Packet23VehicleSpawn(this.myEntity, 70, entityfallingsand.blockID | entityfallingsand.metadata << 16);
575                }
576                else if (this.myEntity instanceof EntityPainting)
577                {
578                    return new Packet25EntityPainting((EntityPainting)this.myEntity);
579                }
580                else if (this.myEntity instanceof EntityItemFrame)
581                {
582                    EntityItemFrame entityitemframe = (EntityItemFrame)this.myEntity;
583                    packet23vehiclespawn = new Packet23VehicleSpawn(this.myEntity, 71, entityitemframe.hangingDirection);
584                    packet23vehiclespawn.xPosition = MathHelper.floor_float((float)(entityitemframe.xPosition * 32));
585                    packet23vehiclespawn.yPosition = MathHelper.floor_float((float)(entityitemframe.yPosition * 32));
586                    packet23vehiclespawn.zPosition = MathHelper.floor_float((float)(entityitemframe.zPosition * 32));
587                    return packet23vehiclespawn;
588                }
589                else if (this.myEntity instanceof EntityXPOrb)
590                {
591                    return new Packet26EntityExpOrb((EntityXPOrb)this.myEntity);
592                }
593                else
594                {
595                    throw new IllegalArgumentException("Don\'t know how to add " + this.myEntity.getClass() + "!");
596                }
597            }
598        }
599        else
600        {
601            this.lastHeadMotion = MathHelper.floor_float(this.myEntity.getRotationYawHead() * 256.0F / 360.0F);
602            return new Packet24MobSpawn((EntityLiving)this.myEntity);
603        }
604    }
605
606    public void removePlayerFromTracker(EntityPlayerMP par1EntityPlayerMP)
607    {
608        if (this.trackingPlayers.contains(par1EntityPlayerMP))
609        {
610            this.trackingPlayers.remove(par1EntityPlayerMP);
611            par1EntityPlayerMP.destroyedItemsNetCache.add(Integer.valueOf(this.myEntity.entityId));
612        }
613    }
614}