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cn.nukkit.entity.item.EntityItem Maven / Gradle / Ivy
package cn.nukkit.entity.item;
import cn.nukkit.Server;
import cn.nukkit.api.PowerNukkitDifference;
import cn.nukkit.api.PowerNukkitOnly;
import cn.nukkit.api.Since;
import cn.nukkit.block.BlockID;
import cn.nukkit.entity.Entity;
import cn.nukkit.event.entity.EntityDamageEvent;
import cn.nukkit.event.entity.EntityDamageEvent.DamageCause;
import cn.nukkit.event.entity.ItemDespawnEvent;
import cn.nukkit.event.entity.ItemSpawnEvent;
import cn.nukkit.item.Item;
import cn.nukkit.level.format.FullChunk;
import cn.nukkit.nbt.NBTIO;
import cn.nukkit.nbt.tag.CompoundTag;
import cn.nukkit.network.protocol.AddItemEntityPacket;
import cn.nukkit.network.protocol.DataPacket;
import cn.nukkit.network.protocol.EntityEventPacket;
/**
* @author MagicDroidX
*/
public class EntityItem extends Entity {
public static final int NETWORK_ID = 64;
protected String owner;
protected String thrower;
protected Item item;
protected int pickupDelay;
public EntityItem(FullChunk chunk, CompoundTag nbt) {
super(chunk, nbt);
}
@Override
public int getNetworkId() {
return NETWORK_ID;
}
@Override
public float getWidth() {
return 0.25f;
}
@Override
public float getLength() {
return 0.25f;
}
@Override
public float getHeight() {
return 0.25f;
}
@Override
public float getGravity() {
return 0.04f;
}
@Override
public float getDrag() {
return 0.02f;
}
@Override
protected float getBaseOffset() {
return 0.125f;
}
@Override
public boolean canCollide() {
return false;
}
@Override
protected void initEntity() {
super.initEntity();
this.setMaxHealth(5);
this.setHealth(this.namedTag.getShort("Health"));
if (this.namedTag.contains("Age")) {
this.age = this.namedTag.getShort("Age");
}
if (this.namedTag.contains("PickupDelay")) {
this.pickupDelay = this.namedTag.getShort("PickupDelay");
}
if (this.namedTag.contains("Owner")) {
this.owner = this.namedTag.getString("Owner");
}
if (this.namedTag.contains("Thrower")) {
this.thrower = this.namedTag.getString("Thrower");
}
if (!this.namedTag.contains("Item")) {
this.close();
return;
}
this.item = NBTIO.getItemHelper(this.namedTag.getCompound("Item"));
this.setDataFlag(DATA_FLAGS, DATA_FLAG_GRAVITY, true);
if (this.item.isLavaResistant()) {
this.fireProof = true; // Netherite items are fireproof
}
this.server.getPluginManager().callEvent(new ItemSpawnEvent(this));
}
@PowerNukkitDifference(since = "1.4.0.0-PN", info = "Netherite stuff is immune to fire and lava damage")
@Override
public boolean attack(EntityDamageEvent source) {
if (item != null && item.isLavaResistant() && (
source.getCause() == DamageCause.LAVA ||
source.getCause() == DamageCause.FIRE ||
source.getCause() == DamageCause.FIRE_TICK)) {
return false;
}
return (source.getCause() == DamageCause.VOID ||
source.getCause() == DamageCause.CONTACT ||
source.getCause() == DamageCause.FIRE_TICK ||
(source.getCause() == DamageCause.ENTITY_EXPLOSION ||
source.getCause() == DamageCause.BLOCK_EXPLOSION) &&
!this.isInsideOfWater() && (this.item == null ||
this.item.getId() != Item.NETHER_STAR)) && super.attack(source);
}
@Override
public boolean onUpdate(int currentTick) {
if (this.closed) {
return false;
}
int tickDiff = currentTick - this.lastUpdate;
if (tickDiff <= 0 && !this.justCreated) {
return true;
}
this.lastUpdate = currentTick;
this.timing.startTiming();
if (this.age % 60 == 0 && this.onGround && this.getItem() != null && this.isAlive()) {
if (this.getItem().getCount() < this.getItem().getMaxStackSize()) {
for (Entity entity : this.getLevel().getNearbyEntities(getBoundingBox().grow(1, 1, 1), this, false)) {
if (entity instanceof EntityItem) {
if (!entity.isAlive()) {
continue;
}
Item closeItem = ((EntityItem) entity).getItem();
if (!closeItem.equals(getItem(), true, true)) {
continue;
}
if (!entity.isOnGround()) {
continue;
}
int newAmount = this.getItem().getCount() + closeItem.getCount();
if (newAmount > this.getItem().getMaxStackSize()) {
continue;
}
entity.close();
this.getItem().setCount(newAmount);
EntityEventPacket packet = new EntityEventPacket();
packet.eid = getId();
packet.data = newAmount;
packet.event = EntityEventPacket.MERGE_ITEMS;
Server.broadcastPacket(this.getViewers().values(), packet);
}
}
}
}
boolean hasUpdate = this.entityBaseTick(tickDiff);
boolean lavaResistant = fireProof || item != null && item.isLavaResistant();
if (!lavaResistant && (isInsideOfFire() || isInsideOfLava())) {
this.kill();
}
if (this.isAlive()) {
if (this.pickupDelay > 0 && this.pickupDelay < 32767) {
this.pickupDelay -= tickDiff;
if (this.pickupDelay < 0) {
this.pickupDelay = 0;
}
}/* else { // Done in Player#checkNearEntities
for (Entity entity : this.level.getNearbyEntities(this.boundingBox.grow(1, 0.5, 1), this)) {
if (entity instanceof Player) {
if (((Player) entity).pickupEntity(this, true)) {
return true;
}
}
}
}*/
int bid = this.level.getBlockIdAt((int) this.x, (int) this.boundingBox.getMaxY(), (int) this.z, 0);
if (bid == BlockID.FLOWING_WATER || bid == BlockID.STILL_WATER
|| (bid = this.level.getBlockIdAt((int) this.x, (int) this.boundingBox.getMaxY(), (int) this.z, 1)) == BlockID.FLOWING_WATER
|| bid == BlockID.STILL_WATER
) {
//item is fully in water or in still water
this.motionY -= this.getGravity() * -0.015;
} else if (lavaResistant && (
this.level.getBlockIdAt((int) this.x, (int) this.boundingBox.getMaxY(), (int) this.z, 0) == BlockID.FLOWING_LAVA
|| this.level.getBlockIdAt((int) this.x, (int) this.boundingBox.getMaxY(), (int) this.z, 0) == BlockID.STILL_LAVA
|| this.level.getBlockIdAt((int) this.x, (int) this.boundingBox.getMaxY(), (int) this.z, 1) == BlockID.FLOWING_LAVA
|| this.level.getBlockIdAt((int) this.x, (int) this.boundingBox.getMaxY(), (int) this.z, 1) == BlockID.STILL_LAVA
)) {
//item is fully in lava or in still lava
this.motionY -= this.getGravity() * -0.015;
} else if (this.isInsideOfWater() || lavaResistant && this.isInsideOfLava()) {
this.motionY = this.getGravity() - 0.06; //item is going up in water, don't let it go back down too fast
} else {
this.motionY -= this.getGravity(); //item is not in water
}
if (this.checkObstruction(this.x, this.y, this.z)) {
hasUpdate = true;
}
this.move(this.motionX, this.motionY, this.motionZ);
double friction = 1 - this.getDrag();
if (this.onGround && (Math.abs(this.motionX) > 0.00001 || Math.abs(this.motionZ) > 0.00001)) {
friction *= this.getLevel().getBlock(this.temporalVector.setComponents((int) Math.floor(this.x), (int) Math.floor(this.y - 1), (int) Math.floor(this.z))).getFrictionFactor();
}
this.motionX *= friction;
this.motionY *= 1 - this.getDrag();
this.motionZ *= friction;
if (this.onGround) {
this.motionY *= -0.5;
}
this.updateMovement();
if (this.age > 6000) {
ItemDespawnEvent ev = new ItemDespawnEvent(this);
this.server.getPluginManager().callEvent(ev);
if (ev.isCancelled()) {
this.age = 0;
} else {
this.kill();
hasUpdate = true;
}
}
}
this.timing.stopTiming();
return hasUpdate || !this.onGround || Math.abs(this.motionX) > 0.00001 || Math.abs(this.motionY) > 0.00001 || Math.abs(this.motionZ) > 0.00001;
}
@Override
public void setOnFire(int seconds) {
if (item != null && item.isLavaResistant()) {
return;
}
super.setOnFire(seconds);
}
@Override
public void saveNBT() {
super.saveNBT();
if (this.item != null) { // Yes, a item can be null... I don't know what causes this, but it can happen.
this.namedTag.putCompound("Item", NBTIO.putItemHelper(this.item, -1));
this.namedTag.putShort("Health", (int) this.getHealth());
this.namedTag.putShort("Age", this.age);
this.namedTag.putShort("PickupDelay", this.pickupDelay);
if (this.owner != null) {
this.namedTag.putString("Owner", this.owner);
}
if (this.thrower != null) {
this.namedTag.putString("Thrower", this.thrower);
}
}
}
@Since("1.5.1.0-PN")
@PowerNukkitOnly
@Override
public String getOriginalName() {
return "Item";
}
@Override
public String getName() {
if (this.hasCustomName()) {
return getNameTag();
}
if (item == null) {
return getOriginalName();
}
return item.count + "x " + this.item.getName();
}
public Item getItem() {
return item;
}
@Override
public boolean canCollideWith(Entity entity) {
return false;
}
public int getPickupDelay() {
return pickupDelay;
}
public void setPickupDelay(int pickupDelay) {
this.pickupDelay = pickupDelay;
}
public String getOwner() {
return owner;
}
public void setOwner(String owner) {
this.owner = owner;
}
public String getThrower() {
return thrower;
}
public void setThrower(String thrower) {
this.thrower = thrower;
}
@Override
public DataPacket createAddEntityPacket() {
AddItemEntityPacket addEntity = new AddItemEntityPacket();
addEntity.entityUniqueId = this.getId();
addEntity.entityRuntimeId = this.getId();
addEntity.x = (float) this.x;
addEntity.y = (float) this.y + this.getBaseOffset();
addEntity.z = (float) this.z;
addEntity.speedX = (float) this.motionX;
addEntity.speedY = (float) this.motionY;
addEntity.speedZ = (float) this.motionZ;
addEntity.metadata = this.dataProperties;
addEntity.item = this.getItem();
return addEntity;
}
@Override
public boolean doesTriggerPressurePlate() {
return true;
}
}
