minecraft-src/net/minecraft/world/entity/animal/Chicken.java

package net.minecraft.world.entity.animal;

import net.minecraft.core.BlockPos;
import net.minecraft.nbt.CompoundTag;
import net.minecraft.server.level.ServerLevel;
import net.minecraft.sounds.SoundEvent;
import net.minecraft.sounds.SoundEvents;
import net.minecraft.tags.ItemTags;
import net.minecraft.util.Mth;
import net.minecraft.world.damagesource.DamageSource;
import net.minecraft.world.entity.AgeableMob;
import net.minecraft.world.entity.Entity;
import net.minecraft.world.entity.EntityDimensions;
import net.minecraft.world.entity.EntitySpawnReason;
import net.minecraft.world.entity.EntityType;
import net.minecraft.world.entity.LivingEntity;
import net.minecraft.world.entity.Pose;
import net.minecraft.world.entity.ai.attributes.Attributes;
import net.minecraft.world.entity.ai.attributes.AttributeSupplier.Builder;
import net.minecraft.world.entity.ai.goal.BreedGoal;
import net.minecraft.world.entity.ai.goal.FloatGoal;
import net.minecraft.world.entity.ai.goal.FollowParentGoal;
import net.minecraft.world.entity.ai.goal.LookAtPlayerGoal;
import net.minecraft.world.entity.ai.goal.PanicGoal;
import net.minecraft.world.entity.ai.goal.RandomLookAroundGoal;
import net.minecraft.world.entity.ai.goal.TemptGoal;
import net.minecraft.world.entity.ai.goal.WaterAvoidingRandomStrollGoal;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.block.state.BlockState;
import net.minecraft.world.level.gameevent.GameEvent;
import net.minecraft.world.level.pathfinder.PathType;
import net.minecraft.world.level.storage.loot.BuiltInLootTables;
import net.minecraft.world.phys.Vec3;
import org.jetbrains.annotations.Nullable;

public class Chicken extends Animal {
	private static final EntityDimensions BABY_DIMENSIONS = EntityType.CHICKEN.getDimensions().scale(0.5F).withEyeHeight(0.2975F);
	public float flap;
	public float flapSpeed;
	public float oFlapSpeed;
	public float oFlap;
	public float flapping = 1.0F;
	private float nextFlap = 1.0F;
	public int eggTime = this.random.nextInt(6000) + 6000;
	public boolean isChickenJockey;

	public Chicken(EntityType<? extends Chicken> entityType, Level level) {
		super(entityType, level);
		this.setPathfindingMalus(PathType.WATER, 0.0F);
	}

	@Override
	protected void registerGoals() {
		this.goalSelector.addGoal(0, new FloatGoal(this));
		this.goalSelector.addGoal(1, new PanicGoal(this, 1.4));
		this.goalSelector.addGoal(2, new BreedGoal(this, 1.0));
		this.goalSelector.addGoal(3, new TemptGoal(this, 1.0, itemStack -> itemStack.is(ItemTags.CHICKEN_FOOD), false));
		this.goalSelector.addGoal(4, new FollowParentGoal(this, 1.1));
		this.goalSelector.addGoal(5, new WaterAvoidingRandomStrollGoal(this, 1.0));
		this.goalSelector.addGoal(6, new LookAtPlayerGoal(this, Player.class, 6.0F));
		this.goalSelector.addGoal(7, new RandomLookAroundGoal(this));
	}

	@Override
	public EntityDimensions getDefaultDimensions(Pose pose) {
		return this.isBaby() ? BABY_DIMENSIONS : super.getDefaultDimensions(pose);
	}

	public static Builder createAttributes() {
		return Animal.createAnimalAttributes().add(Attributes.MAX_HEALTH, 4.0).add(Attributes.MOVEMENT_SPEED, 0.25);
	}

	@Override
	public void aiStep() {
		super.aiStep();
		this.oFlap = this.flap;
		this.oFlapSpeed = this.flapSpeed;
		this.flapSpeed = this.flapSpeed + (this.onGround() ? -1.0F : 4.0F) * 0.3F;
		this.flapSpeed = Mth.clamp(this.flapSpeed, 0.0F, 1.0F);
		if (!this.onGround() && this.flapping < 1.0F) {
			this.flapping = 1.0F;
		}

		this.flapping *= 0.9F;
		Vec3 vec3 = this.getDeltaMovement();
		if (!this.onGround() && vec3.y < 0.0) {
			this.setDeltaMovement(vec3.multiply(1.0, 0.6, 1.0));
		}

		this.flap = this.flap + this.flapping * 2.0F;
		if (this.level() instanceof ServerLevel serverLevel && this.isAlive() && !this.isBaby() && !this.isChickenJockey() && --this.eggTime <= 0) {
			if (this.dropFromGiftLootTable(serverLevel, BuiltInLootTables.CHICKEN_LAY, this::spawnAtLocation)) {
				this.playSound(SoundEvents.CHICKEN_EGG, 1.0F, (this.random.nextFloat() - this.random.nextFloat()) * 0.2F + 1.0F);
				this.gameEvent(GameEvent.ENTITY_PLACE);
			}

			this.eggTime = this.random.nextInt(6000) + 6000;
		}
	}

	@Override
	protected boolean isFlapping() {
		return this.flyDist > this.nextFlap;
	}

	@Override
	protected void onFlap() {
		this.nextFlap = this.flyDist + this.flapSpeed / 2.0F;
	}

	@Override
	protected SoundEvent getAmbientSound() {
		return SoundEvents.CHICKEN_AMBIENT;
	}

	@Override
	protected SoundEvent getHurtSound(DamageSource damageSource) {
		return SoundEvents.CHICKEN_HURT;
	}

	@Override
	protected SoundEvent getDeathSound() {
		return SoundEvents.CHICKEN_DEATH;
	}

	@Override
	protected void playStepSound(BlockPos pos, BlockState state) {
		this.playSound(SoundEvents.CHICKEN_STEP, 0.15F, 1.0F);
	}

	@Nullable
	public Chicken getBreedOffspring(ServerLevel level, AgeableMob otherParent) {
		return EntityType.CHICKEN.create(level, EntitySpawnReason.BREEDING);
	}

	@Override
	public boolean isFood(ItemStack stack) {
		return stack.is(ItemTags.CHICKEN_FOOD);
	}

	@Override
	protected int getBaseExperienceReward(ServerLevel level) {
		return this.isChickenJockey() ? 10 : super.getBaseExperienceReward(level);
	}

	@Override
	public void readAdditionalSaveData(CompoundTag tag) {
		super.readAdditionalSaveData(tag);
		this.isChickenJockey = tag.getBoolean("IsChickenJockey");
		if (tag.contains("EggLayTime")) {
			this.eggTime = tag.getInt("EggLayTime");
		}
	}

	@Override
	public void addAdditionalSaveData(CompoundTag tag) {
		super.addAdditionalSaveData(tag);
		tag.putBoolean("IsChickenJockey", this.isChickenJockey);
		tag.putInt("EggLayTime", this.eggTime);
	}

	@Override
	public boolean removeWhenFarAway(double distanceToClosestPlayer) {
		return this.isChickenJockey();
	}

	@Override
	protected void positionRider(Entity passenger, Entity.MoveFunction callback) {
		super.positionRider(passenger, callback);
		if (passenger instanceof LivingEntity) {
			((LivingEntity)passenger).yBodyRot = this.yBodyRot;
		}
	}

	/**
	 * Determines if this chicken is a jokey with a zombie riding it.
	 */
	public boolean isChickenJockey() {
		return this.isChickenJockey;
	}

	/**
	 * Sets whether this chicken is a jockey or not.
	 */
	public void setChickenJockey(boolean isChickenJockey) {
		this.isChickenJockey = isChickenJockey;
	}
}