478 lines
14 KiB
Java
478 lines
14 KiB
Java
package net.minecraft.world.entity.item;
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import java.util.Objects;
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import java.util.UUID;
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import net.minecraft.core.BlockPos;
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import net.minecraft.core.UUIDUtil;
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import net.minecraft.nbt.CompoundTag;
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import net.minecraft.nbt.NbtOps;
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import net.minecraft.nbt.Tag;
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import net.minecraft.network.chat.Component;
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import net.minecraft.network.syncher.EntityDataAccessor;
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import net.minecraft.network.syncher.EntityDataSerializers;
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import net.minecraft.network.syncher.SynchedEntityData;
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import net.minecraft.network.syncher.SynchedEntityData.Builder;
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import net.minecraft.resources.RegistryOps;
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import net.minecraft.server.level.ServerLevel;
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import net.minecraft.sounds.SoundSource;
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import net.minecraft.stats.Stats;
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import net.minecraft.tags.FluidTags;
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import net.minecraft.tags.ItemTags;
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import net.minecraft.util.Mth;
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import net.minecraft.world.damagesource.DamageSource;
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import net.minecraft.world.entity.Entity;
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import net.minecraft.world.entity.EntityType;
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import net.minecraft.world.entity.Mob;
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import net.minecraft.world.entity.MoverType;
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import net.minecraft.world.entity.SlotAccess;
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import net.minecraft.world.entity.TraceableEntity;
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import net.minecraft.world.entity.player.Player;
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import net.minecraft.world.item.Item;
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import net.minecraft.world.item.ItemStack;
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import net.minecraft.world.level.Explosion;
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import net.minecraft.world.level.GameRules;
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import net.minecraft.world.level.Level;
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import net.minecraft.world.level.gameevent.GameEvent;
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import net.minecraft.world.level.portal.TeleportTransition;
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import net.minecraft.world.phys.Vec3;
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import org.jetbrains.annotations.Nullable;
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public class ItemEntity extends Entity implements TraceableEntity {
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private static final EntityDataAccessor<ItemStack> DATA_ITEM = SynchedEntityData.defineId(ItemEntity.class, EntityDataSerializers.ITEM_STACK);
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private static final float FLOAT_HEIGHT = 0.1F;
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public static final float EYE_HEIGHT = 0.2125F;
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private static final int LIFETIME = 6000;
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private static final int INFINITE_PICKUP_DELAY = 32767;
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private static final int INFINITE_LIFETIME = -32768;
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private static final int DEFAULT_HEALTH = 5;
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private static final short DEFAULT_AGE = 0;
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private static final short DEFAULT_PICKUP_DELAY = 0;
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private int age = 0;
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private int pickupDelay = 0;
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private int health = 5;
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@Nullable
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private UUID thrower;
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@Nullable
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private Entity cachedThrower;
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@Nullable
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private UUID target;
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public final float bobOffs;
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public ItemEntity(EntityType<? extends ItemEntity> entityType, Level level) {
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super(entityType, level);
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this.bobOffs = this.random.nextFloat() * (float) Math.PI * 2.0F;
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this.setYRot(this.random.nextFloat() * 360.0F);
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}
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public ItemEntity(Level level, double posX, double posY, double posZ, ItemStack itemStack) {
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this(level, posX, posY, posZ, itemStack, level.random.nextDouble() * 0.2 - 0.1, 0.2, level.random.nextDouble() * 0.2 - 0.1);
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}
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public ItemEntity(Level level, double posX, double posY, double posZ, ItemStack itemStack, double deltaX, double deltaY, double deltaZ) {
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this(EntityType.ITEM, level);
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this.setPos(posX, posY, posZ);
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this.setDeltaMovement(deltaX, deltaY, deltaZ);
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this.setItem(itemStack);
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}
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private ItemEntity(ItemEntity other) {
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super(other.getType(), other.level());
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this.setItem(other.getItem().copy());
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this.copyPosition(other);
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this.age = other.age;
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this.bobOffs = other.bobOffs;
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}
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@Override
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public boolean dampensVibrations() {
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return this.getItem().is(ItemTags.DAMPENS_VIBRATIONS);
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}
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@Nullable
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@Override
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public Entity getOwner() {
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if (this.cachedThrower != null && !this.cachedThrower.isRemoved()) {
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return this.cachedThrower;
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} else if (this.thrower != null && this.level() instanceof ServerLevel serverLevel) {
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this.cachedThrower = serverLevel.getEntity(this.thrower);
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return this.cachedThrower;
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} else {
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return null;
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}
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}
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@Override
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public void restoreFrom(Entity entity) {
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super.restoreFrom(entity);
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if (entity instanceof ItemEntity itemEntity) {
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this.cachedThrower = itemEntity.cachedThrower;
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}
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}
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@Override
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protected Entity.MovementEmission getMovementEmission() {
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return Entity.MovementEmission.NONE;
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}
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@Override
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protected void defineSynchedData(Builder builder) {
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builder.define(DATA_ITEM, ItemStack.EMPTY);
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}
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@Override
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protected double getDefaultGravity() {
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return 0.04;
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}
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@Override
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public void tick() {
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if (this.getItem().isEmpty()) {
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this.discard();
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} else {
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super.tick();
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if (this.pickupDelay > 0 && this.pickupDelay != 32767) {
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this.pickupDelay--;
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}
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this.xo = this.getX();
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this.yo = this.getY();
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this.zo = this.getZ();
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Vec3 vec3 = this.getDeltaMovement();
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if (this.isInWater() && this.getFluidHeight(FluidTags.WATER) > 0.1F) {
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this.setUnderwaterMovement();
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} else if (this.isInLava() && this.getFluidHeight(FluidTags.LAVA) > 0.1F) {
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this.setUnderLavaMovement();
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} else {
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this.applyGravity();
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}
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if (this.level().isClientSide) {
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this.noPhysics = false;
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} else {
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this.noPhysics = !this.level().noCollision(this, this.getBoundingBox().deflate(1.0E-7));
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if (this.noPhysics) {
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this.moveTowardsClosestSpace(this.getX(), (this.getBoundingBox().minY + this.getBoundingBox().maxY) / 2.0, this.getZ());
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}
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}
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if (!this.onGround() || this.getDeltaMovement().horizontalDistanceSqr() > 1.0E-5F || (this.tickCount + this.getId()) % 4 == 0) {
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this.move(MoverType.SELF, this.getDeltaMovement());
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this.applyEffectsFromBlocks();
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float f = 0.98F;
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if (this.onGround()) {
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f = this.level().getBlockState(this.getBlockPosBelowThatAffectsMyMovement()).getBlock().getFriction() * 0.98F;
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}
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this.setDeltaMovement(this.getDeltaMovement().multiply(f, 0.98, f));
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if (this.onGround()) {
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Vec3 vec32 = this.getDeltaMovement();
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if (vec32.y < 0.0) {
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this.setDeltaMovement(vec32.multiply(1.0, -0.5, 1.0));
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}
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}
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}
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boolean bl = Mth.floor(this.xo) != Mth.floor(this.getX()) || Mth.floor(this.yo) != Mth.floor(this.getY()) || Mth.floor(this.zo) != Mth.floor(this.getZ());
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int i = bl ? 2 : 40;
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if (this.tickCount % i == 0 && !this.level().isClientSide && this.isMergable()) {
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this.mergeWithNeighbours();
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}
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if (this.age != -32768) {
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this.age++;
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}
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this.hasImpulse = this.hasImpulse | this.updateInWaterStateAndDoFluidPushing();
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if (!this.level().isClientSide) {
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double d = this.getDeltaMovement().subtract(vec3).lengthSqr();
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if (d > 0.01) {
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this.hasImpulse = true;
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}
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}
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if (!this.level().isClientSide && this.age >= 6000) {
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this.discard();
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}
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}
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}
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@Override
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public BlockPos getBlockPosBelowThatAffectsMyMovement() {
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return this.getOnPos(0.999999F);
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}
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private void setUnderwaterMovement() {
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this.setFluidMovement(0.99F);
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}
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private void setUnderLavaMovement() {
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this.setFluidMovement(0.95F);
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}
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private void setFluidMovement(double multiplier) {
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Vec3 vec3 = this.getDeltaMovement();
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this.setDeltaMovement(vec3.x * multiplier, vec3.y + (vec3.y < 0.06F ? 5.0E-4F : 0.0F), vec3.z * multiplier);
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}
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/**
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* Looks for other itemstacks nearby and tries to stack them together
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*/
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private void mergeWithNeighbours() {
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if (this.isMergable()) {
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for (ItemEntity itemEntity : this.level()
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.getEntitiesOfClass(ItemEntity.class, this.getBoundingBox().inflate(0.5, 0.0, 0.5), itemEntityx -> itemEntityx != this && itemEntityx.isMergable())) {
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if (itemEntity.isMergable()) {
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this.tryToMerge(itemEntity);
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if (this.isRemoved()) {
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break;
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}
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}
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}
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}
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}
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private boolean isMergable() {
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ItemStack itemStack = this.getItem();
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return this.isAlive() && this.pickupDelay != 32767 && this.age != -32768 && this.age < 6000 && itemStack.getCount() < itemStack.getMaxStackSize();
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}
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private void tryToMerge(ItemEntity itemEntity) {
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ItemStack itemStack = this.getItem();
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ItemStack itemStack2 = itemEntity.getItem();
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if (Objects.equals(this.target, itemEntity.target) && areMergable(itemStack, itemStack2)) {
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if (itemStack2.getCount() < itemStack.getCount()) {
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merge(this, itemStack, itemEntity, itemStack2);
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} else {
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merge(itemEntity, itemStack2, this, itemStack);
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}
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}
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}
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public static boolean areMergable(ItemStack destinationStack, ItemStack originStack) {
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return originStack.getCount() + destinationStack.getCount() > originStack.getMaxStackSize()
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? false
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: ItemStack.isSameItemSameComponents(destinationStack, originStack);
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}
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public static ItemStack merge(ItemStack destinationStack, ItemStack originStack, int amount) {
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int i = Math.min(Math.min(destinationStack.getMaxStackSize(), amount) - destinationStack.getCount(), originStack.getCount());
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ItemStack itemStack = destinationStack.copyWithCount(destinationStack.getCount() + i);
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originStack.shrink(i);
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return itemStack;
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}
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private static void merge(ItemEntity destinationEntity, ItemStack destinationStack, ItemStack originStack) {
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ItemStack itemStack = merge(destinationStack, originStack, 64);
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destinationEntity.setItem(itemStack);
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}
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private static void merge(ItemEntity destinationEntity, ItemStack destinationStack, ItemEntity originEntity, ItemStack originStack) {
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merge(destinationEntity, destinationStack, originStack);
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destinationEntity.pickupDelay = Math.max(destinationEntity.pickupDelay, originEntity.pickupDelay);
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destinationEntity.age = Math.min(destinationEntity.age, originEntity.age);
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if (originStack.isEmpty()) {
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originEntity.discard();
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}
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}
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@Override
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public boolean fireImmune() {
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return !this.getItem().canBeHurtBy(this.damageSources().inFire()) || super.fireImmune();
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}
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@Override
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protected boolean shouldPlayLavaHurtSound() {
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return this.health <= 0 ? true : this.tickCount % 10 == 0;
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}
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@Override
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public final boolean hurtClient(DamageSource damageSource) {
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return this.isInvulnerableToBase(damageSource) ? false : this.getItem().canBeHurtBy(damageSource);
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}
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@Override
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public final boolean hurtServer(ServerLevel level, DamageSource damageSource, float amount) {
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if (this.isInvulnerableToBase(damageSource)) {
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return false;
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} else if (!level.getGameRules().getBoolean(GameRules.RULE_MOBGRIEFING) && damageSource.getEntity() instanceof Mob) {
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return false;
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} else if (!this.getItem().canBeHurtBy(damageSource)) {
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return false;
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} else {
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this.markHurt();
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this.health = (int)(this.health - amount);
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this.gameEvent(GameEvent.ENTITY_DAMAGE, damageSource.getEntity());
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if (this.health <= 0) {
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this.getItem().onDestroyed(this);
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this.discard();
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}
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return true;
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}
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}
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@Override
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public boolean ignoreExplosion(Explosion explosion) {
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return explosion.shouldAffectBlocklikeEntities() ? super.ignoreExplosion(explosion) : true;
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}
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@Override
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public void addAdditionalSaveData(CompoundTag tag) {
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tag.putShort("Health", (short)this.health);
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tag.putShort("Age", (short)this.age);
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tag.putShort("PickupDelay", (short)this.pickupDelay);
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tag.storeNullable("Thrower", UUIDUtil.CODEC, this.thrower);
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tag.storeNullable("Owner", UUIDUtil.CODEC, this.target);
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if (!this.getItem().isEmpty()) {
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RegistryOps<Tag> registryOps = this.registryAccess().createSerializationContext(NbtOps.INSTANCE);
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tag.store("Item", ItemStack.CODEC, registryOps, this.getItem());
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}
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}
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@Override
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public void readAdditionalSaveData(CompoundTag tag) {
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this.health = tag.getShortOr("Health", (short)5);
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this.age = tag.getShortOr("Age", (short)0);
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this.pickupDelay = tag.getShortOr("PickupDelay", (short)0);
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this.target = (UUID)tag.read("Owner", UUIDUtil.CODEC).orElse(null);
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this.thrower = (UUID)tag.read("Thrower", UUIDUtil.CODEC).orElse(null);
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this.cachedThrower = null;
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RegistryOps<Tag> registryOps = this.registryAccess().createSerializationContext(NbtOps.INSTANCE);
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this.setItem((ItemStack)tag.read("Item", ItemStack.CODEC, registryOps).orElse(ItemStack.EMPTY));
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if (this.getItem().isEmpty()) {
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this.discard();
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}
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}
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@Override
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public void playerTouch(Player player) {
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if (!this.level().isClientSide) {
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ItemStack itemStack = this.getItem();
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Item item = itemStack.getItem();
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int i = itemStack.getCount();
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if (this.pickupDelay == 0 && (this.target == null || this.target.equals(player.getUUID())) && player.getInventory().add(itemStack)) {
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player.take(this, i);
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if (itemStack.isEmpty()) {
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this.discard();
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itemStack.setCount(i);
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}
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player.awardStat(Stats.ITEM_PICKED_UP.get(item), i);
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player.onItemPickup(this);
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}
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}
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}
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@Override
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public Component getName() {
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Component component = this.getCustomName();
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return component != null ? component : this.getItem().getItemName();
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}
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@Override
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public boolean isAttackable() {
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return false;
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}
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@Nullable
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@Override
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public Entity teleport(TeleportTransition teleportTransition) {
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Entity entity = super.teleport(teleportTransition);
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if (!this.level().isClientSide && entity instanceof ItemEntity itemEntity) {
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itemEntity.mergeWithNeighbours();
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}
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return entity;
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}
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/**
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* Gets the item that this entity represents.
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*/
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public ItemStack getItem() {
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return this.getEntityData().get(DATA_ITEM);
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}
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/**
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* Sets the item that this entity represents.
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*/
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public void setItem(ItemStack stack) {
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this.getEntityData().set(DATA_ITEM, stack);
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}
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@Override
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public void onSyncedDataUpdated(EntityDataAccessor<?> dataAccessor) {
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super.onSyncedDataUpdated(dataAccessor);
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if (DATA_ITEM.equals(dataAccessor)) {
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this.getItem().setEntityRepresentation(this);
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}
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}
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public void setTarget(@Nullable UUID target) {
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this.target = target;
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}
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public void setThrower(Entity thrower) {
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this.thrower = thrower.getUUID();
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this.cachedThrower = thrower;
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}
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public int getAge() {
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return this.age;
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}
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public void setDefaultPickUpDelay() {
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this.pickupDelay = 10;
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}
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public void setNoPickUpDelay() {
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this.pickupDelay = 0;
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}
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public void setNeverPickUp() {
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this.pickupDelay = 32767;
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}
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public void setPickUpDelay(int pickupDelay) {
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this.pickupDelay = pickupDelay;
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}
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public boolean hasPickUpDelay() {
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return this.pickupDelay > 0;
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}
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public void setUnlimitedLifetime() {
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this.age = -32768;
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}
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public void setExtendedLifetime() {
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this.age = -6000;
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}
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public void makeFakeItem() {
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this.setNeverPickUp();
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this.age = 5999;
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}
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public static float getSpin(float age, float bobOffset) {
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return age / 20.0F + bobOffset;
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}
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public ItemEntity copy() {
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return new ItemEntity(this);
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}
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@Override
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public SoundSource getSoundSource() {
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return SoundSource.AMBIENT;
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}
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@Override
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public float getVisualRotationYInDegrees() {
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return 180.0F - getSpin(this.getAge() + 0.5F, this.bobOffs) / (float) (Math.PI * 2) * 360.0F;
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}
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@Override
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public SlotAccess getSlot(int slot) {
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return slot == 0 ? SlotAccess.of(this::getItem, this::setItem) : super.getSlot(slot);
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}
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}
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