Code/net/minecraft/world/entity/projectile/LlamaSpit.java

package net.minecraft.world.entity.projectile;

import net.minecraft.core.particles.ParticleTypes;
import net.minecraft.network.protocol.game.ClientboundAddEntityPacket;
import net.minecraft.network.syncher.SynchedEntityData;
import net.minecraft.server.level.ServerLevel;
import net.minecraft.util.Mth;
import net.minecraft.world.damagesource.DamageSource;
import net.minecraft.world.entity.Entity;
import net.minecraft.world.entity.EntityType;
import net.minecraft.world.entity.LivingEntity;
import net.minecraft.world.entity.animal.horse.Llama;
import net.minecraft.world.item.enchantment.EnchantmentHelper;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.block.state.BlockBehaviour;
import net.minecraft.world.phys.BlockHitResult;
import net.minecraft.world.phys.EntityHitResult;
import net.minecraft.world.phys.HitResult;
import net.minecraft.world.phys.Vec3;

public class LlamaSpit extends Projectile {
    public LlamaSpit(EntityType<? extends LlamaSpit> p_37224_, Level p_37225_) {
        super(p_37224_, p_37225_);
    }

    public LlamaSpit(Level p_37235_, Llama p_37236_) {
        this(EntityType.LLAMA_SPIT, p_37235_);
        this.setOwner(p_37236_);
        this.setPos(
            p_37236_.getX() - (p_37236_.getBbWidth() + 1.0F) * 0.5 * Mth.sin(p_37236_.yBodyRot * (float) (Math.PI / 180.0)),
            p_37236_.getEyeY() - 0.1F,
            p_37236_.getZ() + (p_37236_.getBbWidth() + 1.0F) * 0.5 * Mth.cos(p_37236_.yBodyRot * (float) (Math.PI / 180.0))
        );
    }

    @Override
    protected double getDefaultGravity() {
        return 0.06;
    }

    @Override
    public void tick() {
        super.tick();
        Vec3 vec3 = this.getDeltaMovement();
        HitResult hitresult = ProjectileUtil.getHitResultOnMoveVector(this, this::canHitEntity);
        this.hitTargetOrDeflectSelf(hitresult);
        double d0 = this.getX() + vec3.x;
        double d1 = this.getY() + vec3.y;
        double d2 = this.getZ() + vec3.z;
        this.updateRotation();
        float f = 0.99F;
        if (this.level().getBlockStates(this.getBoundingBox()).noneMatch(BlockBehaviour.BlockStateBase::isAir)) {
            this.discard();
        } else if (this.isInWater()) {
            this.discard();
        } else {
            this.setDeltaMovement(vec3.scale(0.99F));
            this.applyGravity();
            this.setPos(d0, d1, d2);
        }
    }

    @Override
    protected void onHitEntity(EntityHitResult p_37241_) {
        super.onHitEntity(p_37241_);
        if (this.getOwner() instanceof LivingEntity livingentity) {
            Entity entity = p_37241_.getEntity();
            DamageSource damagesource = this.damageSources().spit(this, livingentity);
            if (this.level() instanceof ServerLevel serverlevel && entity.hurtServer(serverlevel, damagesource, 1.0F)) {
                EnchantmentHelper.doPostAttackEffects(serverlevel, entity, damagesource);
            }
        }
    }

    @Override
    protected void onHitBlock(BlockHitResult p_37239_) {
        super.onHitBlock(p_37239_);
        if (!this.level().isClientSide) {
            this.discard();
        }
    }

    @Override
    protected void defineSynchedData(SynchedEntityData.Builder p_335399_) {
    }

    @Override
    public void recreateFromPacket(ClientboundAddEntityPacket p_150162_) {
        super.recreateFromPacket(p_150162_);
        double d0 = p_150162_.getXa();
        double d1 = p_150162_.getYa();
        double d2 = p_150162_.getZa();

        for (int i = 0; i < 7; i++) {
            double d3 = 0.4 + 0.1 * i;
            this.level().addParticle(ParticleTypes.SPIT, this.getX(), this.getY(), this.getZ(), d0 * d3, d1, d2 * d3);
        }

        this.setDeltaMovement(d0, d1, d2);
    }
}