Minestom/src/main/java/net/minestom/server/entity/Entity.java

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package net.minestom.server.entity;
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import net.minestom.server.MinecraftServer;
import net.minestom.server.Viewable;
import net.minestom.server.collision.BoundingBox;
import net.minestom.server.collision.CollisionUtils;
import net.minestom.server.data.Data;
import net.minestom.server.data.DataContainer;
import net.minestom.server.event.Event;
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import net.minestom.server.event.EventCallback;
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import net.minestom.server.event.entity.EntityDeathEvent;
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import net.minestom.server.event.entity.EntitySpawnEvent;
import net.minestom.server.event.entity.EntityTickEvent;
import net.minestom.server.event.entity.EntityVelocityEvent;
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import net.minestom.server.event.handler.EventHandler;
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import net.minestom.server.instance.Chunk;
import net.minestom.server.instance.Instance;
import net.minestom.server.instance.block.CustomBlock;
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import net.minestom.server.network.packet.PacketWriter;
import net.minestom.server.network.packet.server.play.*;
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import net.minestom.server.utils.Vector;
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import net.minestom.server.utils.*;
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import net.minestom.server.utils.time.TimeUnit;
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import net.minestom.server.utils.validate.Check;
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import java.util.*;
import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.CopyOnWriteArraySet;
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import java.util.concurrent.atomic.AtomicInteger;
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import java.util.function.Consumer;
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public abstract class Entity implements Viewable, EventHandler, DataContainer {
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private static Map<Integer, Entity> entityById = new ConcurrentHashMap<>();
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private static AtomicInteger lastEntityId = new AtomicInteger();
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// Metadata
protected static final byte METADATA_BYTE = 0;
protected static final byte METADATA_VARINT = 1;
protected static final byte METADATA_FLOAT = 2;
protected static final byte METADATA_STRING = 3;
protected static final byte METADATA_CHAT = 4;
protected static final byte METADATA_OPTCHAT = 5;
protected static final byte METADATA_SLOT = 6;
protected static final byte METADATA_BOOLEAN = 7;
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protected static final byte METADATA_POSE = 18;
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protected Instance instance;
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protected Position position;
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protected float lastX, lastY, lastZ;
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protected float lastYaw, lastPitch;
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private int id;
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private BoundingBox boundingBox;
protected Entity vehicle;
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// Velocity
protected Vector velocity = new Vector(); // Movement in block per second
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protected float gravityDragPerTick;
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protected float eyeHeight;
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private boolean autoViewable;
private Set<Player> viewers = new CopyOnWriteArraySet<>();
private Data data;
private Set<Entity> passengers = new CopyOnWriteArraySet<>();
protected UUID uuid;
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private boolean isActive; // False if entity has only been instanced without being added somewhere
private boolean shouldRemove;
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private long scheduledRemoveTime;
private int entityType;
private long lastUpdate;
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private Map<Class<? extends Event>, List<EventCallback>> eventCallbacks = new ConcurrentHashMap<>();
protected long lastVelocityUpdateTime; // Reset velocity to 0 after countdown
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// Synchronization
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private long synchronizationDelay = 1500; // In ms
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private long lastSynchronizationTime;
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// Metadata
protected boolean onFire;
protected boolean crouched;
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protected boolean UNUSED_METADATA;
protected boolean sprinting;
protected boolean swimming;
protected boolean invisible;
protected boolean glowing;
protected boolean usingElytra;
protected int air = 300;
protected String customName = "";
protected boolean customNameVisible;
protected boolean silent;
protected boolean noGravity;
protected Pose pose = Pose.STANDING;
private long velocityUpdatePeriod;
protected boolean onGround;
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// Tick related
private long ticks;
private final EntityTickEvent tickEvent = new EntityTickEvent(this);
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public Entity(int entityType, Position spawnPosition) {
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this.id = generateId();
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this.entityType = entityType;
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this.uuid = UUID.randomUUID();
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this.position = spawnPosition.clone();
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setBoundingBox(0, 0, 0);
setAutoViewable(true);
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entityById.put(id, this);
setVelocityUpdatePeriod(5);
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}
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public Entity(int entityType) {
this(entityType, new Position());
}
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/**
* @param id the entity unique id ({@link #getEntityId()})
* @return the entity having the specified id, null if not found
*/
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public static Entity getEntity(int id) {
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return entityById.getOrDefault(id, null);
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}
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private static int generateId() {
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return lastEntityId.incrementAndGet();
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}
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/**
* Called each tick
*/
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public abstract void update();
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/**
* Called when a new instance is set
*/
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public abstract void spawn();
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public boolean isOnGround() {
return onGround || EntityUtils.isOnGround(this) /* backup for levitating entities */;
}
/**
* Checks if now is a good time to send a velocity update packet
*
* @param time
* @return
*/
protected boolean shouldSendVelocityUpdate(long time) {
return (time - lastVelocityUpdateTime) >= velocityUpdatePeriod;
}
/**
* Gets the period, in ms, between two velocity update packets
*
* @return period, in ms, between two velocity update packets
*/
public long getVelocityUpdatePeriod() {
return velocityUpdatePeriod;
}
/**
* Sets the period, in ms, between two velocity update packets
*
* @param velocityUpdatePeriod period, in ms, between two velocity update packets
*/
public void setVelocityUpdatePeriod(long velocityUpdatePeriod) {
this.velocityUpdatePeriod = velocityUpdatePeriod;
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}
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public void teleport(Position position, Runnable callback) {
Check.notNull(position, "Teleport position cannot be null");
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Check.stateCondition(instance == null, "You need to use Entity#setInstance before teleporting an entity!");
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Runnable runnable = () -> {
refreshPosition(position.getX(), position.getY(), position.getZ());
refreshView(position.getYaw(), position.getPitch());
EntityTeleportPacket entityTeleportPacket = new EntityTeleportPacket();
entityTeleportPacket.entityId = getEntityId();
entityTeleportPacket.position = position;
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entityTeleportPacket.onGround = isOnGround();
sendPacketToViewers(entityTeleportPacket);
};
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if (instance.hasEnabledAutoChunkLoad()) {
instance.loadChunk(position, chunk -> {
runnable.run();
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if (callback != null)
callback.run();
});
} else {
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if (ChunkUtils.isChunkUnloaded(instance, position.getX(), position.getZ()))
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return;
runnable.run();
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if (callback != null)
callback.run();
}
}
public void teleport(Position position) {
teleport(position, null);
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}
/**
* When set to true, the entity will automatically get new viewers when they come too close
* This can be use to complete control over which player can see it, without having to deal with
* raw packets
* <p>
* True by default for all entities
* When set to false, it is important to mention that the players will not be removed automatically from its viewers
* list, you would have to do that manually when being too far
*
* @return true if the entity is automatically viewable for close players, false otherwise
*/
public boolean isAutoViewable() {
return autoViewable;
}
/**
* @param autoViewable should the entity be automatically viewable for close players
*/
public void setAutoViewable(boolean autoViewable) {
this.autoViewable = autoViewable;
}
@Override
public boolean addViewer(Player player) {
Check.notNull(player, "Viewer cannot be null");
boolean result = this.viewers.add(player);
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player.viewableEntities.add(this);
return result;
}
@Override
public boolean removeViewer(Player player) {
Check.notNull(player, "Viewer cannot be null");
if (!viewers.remove(player))
return false;
DestroyEntitiesPacket destroyEntitiesPacket = new DestroyEntitiesPacket();
destroyEntitiesPacket.entityIds = new int[]{getEntityId()};
player.getPlayerConnection().sendPacket(destroyEntitiesPacket);
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player.viewableEntities.remove(this);
return true;
}
@Override
public Set<Player> getViewers() {
return Collections.unmodifiableSet(viewers);
}
@Override
public Data getData() {
return data;
}
@Override
public void setData(Data data) {
this.data = data;
}
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public void tick(long time) {
if (instance == null)
return;
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if (scheduledRemoveTime != 0) { // Any entity with scheduled remove does not update
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boolean finished = time >= scheduledRemoveTime;
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if (finished) {
remove();
}
return;
}
if (shouldRemove()) {
remove();
return;
}
boolean chunkUnloaded = ChunkUtils.isChunkUnloaded(instance, position.getX(), position.getZ());
if (chunkUnloaded) {
// No update for entities in unloaded chunk
return;
}
if (shouldUpdate(time)) {
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this.lastUpdate = time;
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// Velocity
if (!(this instanceof Player)) {
final float tps = MinecraftServer.TICK_PER_SECOND;
float newX = position.getX() + velocity.getX() / tps;
float newY = position.getY() + velocity.getY() / tps;
float newZ = position.getZ() + velocity.getZ() / tps;
Position newPosition = new Position(newX, newY, newZ);
chunkUnloaded = ChunkUtils.isChunkUnloaded(instance, newX, newZ);
if (chunkUnloaded)
return;
if (!(this instanceof Player) && !noGravity) { // players handle gravity by themselves
velocity.setY(velocity.getY() - gravityDragPerTick * tps);
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}
Vector newVelocityOut = new Vector();
Vector deltaPos = new Vector(
getVelocity().getX() / tps,
getVelocity().getY() / tps,
getVelocity().getZ() / tps
);
onGround = CollisionUtils.handlePhysics(this, deltaPos, newPosition, newVelocityOut);
refreshPosition(newPosition);
velocity.copy(newVelocityOut);
velocity.multiply(tps);
float drag;
if (onGround) {
drag = 0.5f; // ground drag
} else {
drag = 0.98f; // air drag
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}
velocity.setX(velocity.getX() * drag);
velocity.setZ(velocity.getZ() * drag);
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sendSynchronization();
if (shouldSendVelocityUpdate(time)) {
sendPacketToViewers(getVelocityPacket());
lastVelocityUpdateTime = time;
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}
}
// handle block contacts
int minX = (int) Math.floor(boundingBox.getMinX());
int maxX = (int) Math.ceil(boundingBox.getMaxX());
int minY = (int) Math.floor(boundingBox.getMinY());
int maxY = (int) Math.ceil(boundingBox.getMaxY());
int minZ = (int) Math.floor(boundingBox.getMinZ());
int maxZ = (int) Math.ceil(boundingBox.getMaxZ());
BlockPosition tmpPosition = new BlockPosition(0, 0, 0); // allow reuse
for (int y = minY; y <= maxY; y++) {
for (int x = minX; x <= maxX; x++) {
for (int z = minZ; z <= maxZ; z++) {
chunkUnloaded = ChunkUtils.isChunkUnloaded(instance, x, z);
if (chunkUnloaded)
continue;
CustomBlock customBlock = instance.getCustomBlock(x, y, z);
if (customBlock != null) {
tmpPosition.setX(x);
tmpPosition.setY(y);
tmpPosition.setZ(z);
// checks that we are actually in the block, and not just here because of a rounding error
if (boundingBox.intersect(tmpPosition)) {
// TODO: replace with check with custom block bounding box
customBlock.handleContact(instance, tmpPosition, this);
}
}
}
}
}
handleVoid();
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// Call the abstract update method
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update();
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ticks++;
callEvent(EntityTickEvent.class, tickEvent); // reuse tickEvent to avoid recreating it each tick
// Scheduled synchronization
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if (time - lastSynchronizationTime >= synchronizationDelay) {
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lastSynchronizationTime = time;
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sendSynchronization();
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}
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}
if (shouldRemove()) {
remove();
}
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}
/**
* Returns the number of ticks this entity has been active for
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*
* @return
*/
public long getAliveTicks() {
return ticks;
}
/**
* How does this entity handle being in the void?
*/
protected void handleVoid() {
// Kill if in void
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if (getInstance().isInVoid(this.position)) {
remove();
}
}
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@Override
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public <E extends Event> void addEventCallback(Class<E> eventClass, EventCallback<E> eventCallback) {
Check.notNull(eventClass, "Event class cannot be null");
Check.notNull(eventCallback, "Event callback cannot be null");
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List<EventCallback> callbacks = getEventCallbacks(eventClass);
callbacks.add(eventCallback);
this.eventCallbacks.put(eventClass, callbacks);
}
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@Override
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public <E extends Event> List<EventCallback> getEventCallbacks(Class<E> eventClass) {
Check.notNull(eventClass, "Event class cannot be null");
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return eventCallbacks.getOrDefault(eventClass, new CopyOnWriteArrayList<>());
}
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/**
* Each entity has an unique id which will change after a restart
* All entities can be retrieved by calling {@link Entity#getEntity(int)}
*
* @return the unique entity id
*/
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public int getEntityId() {
return id;
}
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public int getEntityType() {
return entityType;
}
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public UUID getUuid() {
return uuid;
}
public boolean isActive() {
return isActive;
}
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public BoundingBox getBoundingBox() {
return boundingBox;
}
public void setBoundingBox(float x, float y, float z) {
this.boundingBox = new BoundingBox(this, x, y, z);
}
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public Instance getInstance() {
return instance;
}
public void setInstance(Instance instance) {
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Check.notNull(instance, "instance cannot be null!");
Check.stateCondition(!MinecraftServer.getInstanceManager().getInstances().contains(instance),
"Instances need to be registered with InstanceManager#createInstanceContainer or InstanceManager#createSharedInstance");
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if (this.instance != null) {
this.instance.removeEntity(this);
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}
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this.isActive = true;
this.instance = instance;
instance.addEntity(this);
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spawn();
EntitySpawnEvent entitySpawnEvent = new EntitySpawnEvent(instance);
callEvent(EntitySpawnEvent.class, entitySpawnEvent);
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}
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public Vector getVelocity() {
return velocity;
}
public void setVelocity(Vector velocity) {
EntityVelocityEvent entityVelocityEvent = new EntityVelocityEvent(this, velocity);
callCancellableEvent(EntityVelocityEvent.class, entityVelocityEvent, () -> {
this.velocity.copy(entityVelocityEvent.getVelocity());
sendPacketToViewers(getVelocityPacket());
});
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}
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public void setGravity(float gravityDragPerTick) {
this.gravityDragPerTick = gravityDragPerTick;
}
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public float getDistance(Entity entity) {
Check.notNull(entity, "Entity cannot be null");
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return getPosition().getDistance(entity.getPosition());
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}
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public Entity getVehicle() {
return vehicle;
}
public void addPassenger(Entity entity) {
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Check.notNull(entity, "Passenger cannot be null");
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Check.stateCondition(instance == null, "You need to set an instance using Entity#setInstance");
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if (entity.getVehicle() != null) {
entity.getVehicle().removePassenger(entity);
}
this.passengers.add(entity);
entity.vehicle = this;
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sendPacketToViewersAndSelf(getPassengersPacket());
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}
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public void removePassenger(Entity entity) {
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Check.notNull(entity, "Passenger cannot be null");
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Check.stateCondition(instance == null, "You need to set an instance using Entity#setInstance");
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if (!passengers.remove(entity))
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return;
entity.vehicle = null;
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sendPacketToViewersAndSelf(getPassengersPacket());
}
public boolean hasPassenger() {
return !passengers.isEmpty();
}
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/**
* @return an unmodifiable list containing all the entity passengers
*/
public Set<Entity> getPassengers() {
return Collections.unmodifiableSet(passengers);
}
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protected SetPassengersPacket getPassengersPacket() {
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SetPassengersPacket passengersPacket = new SetPassengersPacket();
passengersPacket.vehicleEntityId = getEntityId();
int[] passengers = new int[this.passengers.size()];
int counter = 0;
for (Entity passenger : this.passengers) {
passengers[counter++] = passenger.getEntityId();
}
passengersPacket.passengersId = passengers;
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return passengersPacket;
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}
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/**
* Entity statuses can be find <a href="https://wiki.vg/Entity_statuses">here</a>
*
* @param status the status to trigger
*/
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public void triggerStatus(byte status) {
EntityStatusPacket statusPacket = new EntityStatusPacket();
statusPacket.entityId = getEntityId();
statusPacket.status = status;
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sendPacketToViewersAndSelf(statusPacket);
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}
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/**
* @return true if the entity is in fire, false otherwise
*/
public boolean isOnFire() {
return onFire;
}
/**
* Set the entity in fire visually
* <p>
* WARNING: if you want to apply damage or specify a duration,
* see {@link LivingEntity#setFireForDuration(int, TimeUnit)}
*
* @param fire should the entity be set in fire
*/
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public void setOnFire(boolean fire) {
this.onFire = fire;
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sendMetadataIndex(0);
}
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public void setGlowing(boolean glowing) {
this.glowing = glowing;
sendMetadataIndex(0);
}
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/**
* @return true if the entity is glowing, false otherwise
*/
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public boolean isGlowing() {
return glowing;
}
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/**
* @param noGravity should the entity ignore gravity
*/
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public void setNoGravity(boolean noGravity) {
this.noGravity = noGravity;
sendMetadataIndex(5);
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}
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/**
* @return true if the entity ignore gravity, false otherwise
*/
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public boolean hasNoGravity() {
return noGravity;
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}
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/**
* Used to refresh the entity and its passengers position
* - put the entity in the right instance chunk
* - update the viewable chunks (load and unload)
* - add/remove players from the viewers list if {@link #isAutoViewable()} is enabled
* <p>
* WARNING: unsafe, should only be used internally in Minestom
*
* @param x new position X
* @param y new position Y
* @param z new position Z
*/
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public void refreshPosition(float x, float y, float z) {
this.lastX = position.getX();
this.lastY = position.getY();
this.lastZ = position.getZ();
position.setX(x);
position.setY(y);
position.setZ(z);
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if (hasPassenger()) {
for (Entity passenger : getPassengers()) {
passenger.refreshPosition(x, y, z);
}
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}
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Instance instance = getInstance();
if (instance != null) {
Chunk lastChunk = instance.getChunkAt(lastX, lastZ);
Chunk newChunk = instance.getChunkAt(x, z);
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if (lastChunk != null && newChunk != null && lastChunk != newChunk) {
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synchronized (instance) {
instance.removeEntityFromChunk(this, lastChunk);
instance.addEntityToChunk(this, newChunk);
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}
updateView(lastChunk, newChunk);
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}
}
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}
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public void refreshPosition(Position position) {
refreshPosition(position.getX(), position.getY(), position.getZ());
}
private void updateView(Chunk lastChunk, Chunk newChunk) {
boolean isPlayer = this instanceof Player;
if (isPlayer)
((Player) this).onChunkChange(lastChunk, newChunk); // Refresh loaded chunk
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// Refresh entity viewable list
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long[] lastVisibleChunksEntity = ChunkUtils.getChunksInRange(new Position(16 * lastChunk.getChunkX(), 0, 16 * lastChunk.getChunkZ()), MinecraftServer.ENTITY_VIEW_DISTANCE);
long[] updatedVisibleChunksEntity = ChunkUtils.getChunksInRange(new Position(16 * newChunk.getChunkX(), 0, 16 * newChunk.getChunkZ()), MinecraftServer.ENTITY_VIEW_DISTANCE);
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int[] oldChunksEntity = ArrayUtils.getDifferencesBetweenArray(lastVisibleChunksEntity, updatedVisibleChunksEntity);
for (int index : oldChunksEntity) {
int[] chunkPos = ChunkUtils.getChunkCoord(lastVisibleChunksEntity[index]);
Chunk chunk = instance.getChunk(chunkPos[0], chunkPos[1]);
if (chunk == null)
continue;
instance.getChunkEntities(chunk).forEach(ent -> {
if (ent instanceof Player) {
Player player = (Player) ent;
if (isAutoViewable())
removeViewer(player);
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if (isPlayer) {
player.removeViewer((Player) this);
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}
} else if (isPlayer) {
ent.removeViewer((Player) this);
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}
});
}
int[] newChunksEntity = ArrayUtils.getDifferencesBetweenArray(updatedVisibleChunksEntity, lastVisibleChunksEntity);
for (int index : newChunksEntity) {
int[] chunkPos = ChunkUtils.getChunkCoord(updatedVisibleChunksEntity[index]);
Chunk chunk = instance.getChunk(chunkPos[0], chunkPos[1]);
if (chunk == null)
continue;
instance.getChunkEntities(chunk).forEach(ent -> {
if (ent instanceof Player) {
Player player = (Player) ent;
if (isAutoViewable())
addViewer(player);
if (this instanceof Player) {
player.addViewer((Player) this);
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}
} else if (isPlayer) {
ent.addViewer((Player) this);
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}
});
}
}
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public void refreshView(float yaw, float pitch) {
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this.lastYaw = position.getYaw();
this.lastPitch = position.getPitch();
position.setYaw(yaw);
position.setPitch(pitch);
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}
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/**
* Ask for a synchronization (position) to happen during next entity update
*/
public void askSynchronization() {
this.lastSynchronizationTime = 0;
}
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public void refreshSneaking(boolean sneaking) {
this.crouched = sneaking;
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this.pose = sneaking ? Pose.SNEAKING : Pose.STANDING;
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sendMetadataIndex(0);
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sendMetadataIndex(6);
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}
public void refreshSprinting(boolean sprinting) {
this.sprinting = sprinting;
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sendMetadataIndex(0);
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}
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/**
* @return the current position of the entity
*/
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public Position getPosition() {
return position;
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}
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public float getEyeHeight() {
return eyeHeight;
}
public void setEyeHeight(float eyeHeight) {
this.eyeHeight = eyeHeight;
}
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/**
* @param position the checked position chunk
* @return true if the entity is in the same chunk as {@code position}
*/
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public boolean sameChunk(Position position) {
Check.notNull(position, "Position cannot be null");
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Position pos = getPosition();
int chunkX1 = ChunkUtils.getChunkCoordinate((int) Math.floor(pos.getX()));
int chunkZ1 = ChunkUtils.getChunkCoordinate((int) Math.floor(pos.getZ()));
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int chunkX2 = ChunkUtils.getChunkCoordinate((int) Math.floor(position.getX()));
int chunkZ2 = ChunkUtils.getChunkCoordinate((int) Math.floor(position.getZ()));
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return chunkX1 == chunkX2 && chunkZ1 == chunkZ2;
}
public boolean sameChunk(Entity entity) {
return sameChunk(entity.getPosition());
}
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/**
* Remove the entity from the server immediately
* WARNING: this do not trigger the {@link EntityDeathEvent} event
*/
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public void remove() {
this.shouldRemove = true;
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entityById.remove(id);
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if (instance != null)
instance.removeEntity(this);
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}
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/**
* Trigger {@link #remove()} after the specified time
*
* @param delay
* @param timeUnit to determine the delay unit
*/
public void scheduleRemove(long delay, TimeUnit timeUnit) {
delay = timeUnit.toMilliseconds(delay);
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if (delay == 0) { // Cancel the scheduled remove
this.scheduledRemoveTime = 0;
return;
}
this.scheduledRemoveTime = System.currentTimeMillis() + delay;
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}
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/**
* @return true if {@link #scheduleRemove(long, TimeUnit)} has been called, false otherwise
*/
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public boolean isRemoveScheduled() {
return scheduledRemoveTime != 0;
}
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protected EntityVelocityPacket getVelocityPacket() {
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final float strength = 8000f / MinecraftServer.TICK_PER_SECOND;
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EntityVelocityPacket velocityPacket = new EntityVelocityPacket();
velocityPacket.entityId = getEntityId();
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velocityPacket.velocityX = (short) (velocity.getX() * strength);
velocityPacket.velocityY = (short) (velocity.getY() * strength);
velocityPacket.velocityZ = (short) (velocity.getZ() * strength);
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return velocityPacket;
}
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/**
* Used to sync entities together, and sent when adding viewers
*
* @return The {@link EntityMetaDataPacket} related to this entity
*/
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public EntityMetaDataPacket getMetadataPacket() {
EntityMetaDataPacket metaDataPacket = new EntityMetaDataPacket();
metaDataPacket.entityId = getEntityId();
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metaDataPacket.consumer = getMetadataConsumer();
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return metaDataPacket;
}
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/**
* Should be override when wanting to add a new metadata index
*
* @return The consumer used to write {@link EntityMetaDataPacket} in {@link #getMetadataPacket()}
*/
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public Consumer<PacketWriter> getMetadataConsumer() {
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return packet -> {
fillMetadataIndex(packet, 0);
fillMetadataIndex(packet, 1);
fillMetadataIndex(packet, 5);
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fillMetadataIndex(packet, 6);
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};
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}
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/**
* Send a {@link EntityMetaDataPacket} containing only the specified index
* The index is wrote using {@link #fillMetadataIndex(PacketWriter, int)}
*
* @param index
*/
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protected void sendMetadataIndex(int index) {
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EntityMetaDataPacket metaDataPacket = new EntityMetaDataPacket();
metaDataPacket.entityId = getEntityId();
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metaDataPacket.consumer = packet -> {
fillMetadataIndex(packet, index);
};
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sendPacketToViewersAndSelf(metaDataPacket);
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}
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/**
* Used to fill/write a specific metadata index
* The proper use to add a new metadata index is to override this and add your case
* Then you can also override {@link #getMetadataConsumer()} and fill your newly added index
*
* @param packet the packet writer
* @param index the index to fill/write
*/
protected void fillMetadataIndex(PacketWriter packet, int index) {
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switch (index) {
case 0:
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fillStateMetadata(packet);
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break;
case 1:
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fillAirTickMetaData(packet);
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break;
case 2:
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fillCustomNameMetaData(packet);
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break;
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case 5:
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fillNoGravityMetaData(packet);
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break;
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case 6:
fillPoseMetaData(packet);
break;
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}
}
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private void fillStateMetadata(PacketWriter packet) {
packet.writeByte((byte) 0);
packet.writeByte(METADATA_BYTE);
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byte index0 = 0;
if (onFire)
index0 += 1;
if (crouched)
index0 += 2;
if (UNUSED_METADATA)
index0 += 4;
if (sprinting)
index0 += 8;
if (swimming)
index0 += 16;
if (invisible)
index0 += 32;
if (glowing)
index0 += 64;
if (usingElytra)
index0 += 128;
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packet.writeByte(index0);
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}
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private void fillAirTickMetaData(PacketWriter packet) {
packet.writeByte((byte) 1);
packet.writeByte(METADATA_VARINT);
packet.writeVarInt(air);
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}
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private void fillCustomNameMetaData(PacketWriter packet) {
packet.writeByte((byte) 2);
packet.writeByte(METADATA_CHAT);
packet.writeSizedString(customName);
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}
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private void fillNoGravityMetaData(PacketWriter packet) {
packet.writeByte((byte) 5);
packet.writeByte(METADATA_BOOLEAN);
packet.writeBoolean(noGravity);
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}
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private void fillPoseMetaData(PacketWriter packet) {
packet.writeByte((byte) 6);
packet.writeByte(METADATA_POSE);
packet.writeVarInt(pose.ordinal());
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}
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protected void sendSynchronization() {
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EntityTeleportPacket entityTeleportPacket = new EntityTeleportPacket();
entityTeleportPacket.entityId = getEntityId();
entityTeleportPacket.position = getPosition();
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entityTeleportPacket.onGround = isOnGround();
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sendPacketToViewers(entityTeleportPacket);
if (!passengers.isEmpty())
sendPacketToViewers(getPassengersPacket());
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}
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private boolean shouldUpdate(long time) {
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return (float) (time - lastUpdate) >= MinecraftServer.TICK_MS * 0.9f; // Margin of error
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}
public enum Pose {
STANDING,
FALL_FLYING,
SLEEPING,
SWIMMING,
SPIN_ATTACK,
SNEAKING,
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DYING
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}
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protected boolean shouldRemove() {
return shouldRemove;
}
}