Code/net/minecraft/world/item/TridentItem.java

package net.minecraft.world.item;

import java.util.List;
import net.minecraft.core.Direction;
import net.minecraft.core.Holder;
import net.minecraft.core.Position;
import net.minecraft.server.level.ServerLevel;
import net.minecraft.sounds.SoundEvent;
import net.minecraft.sounds.SoundEvents;
import net.minecraft.sounds.SoundSource;
import net.minecraft.stats.Stats;
import net.minecraft.util.Mth;
import net.minecraft.world.InteractionHand;
import net.minecraft.world.InteractionResult;
import net.minecraft.world.entity.EquipmentSlotGroup;
import net.minecraft.world.entity.LivingEntity;
import net.minecraft.world.entity.MoverType;
import net.minecraft.world.entity.ai.attributes.AttributeModifier;
import net.minecraft.world.entity.ai.attributes.Attributes;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.entity.projectile.AbstractArrow;
import net.minecraft.world.entity.projectile.Projectile;
import net.minecraft.world.entity.projectile.ThrownTrident;
import net.minecraft.world.item.component.ItemAttributeModifiers;
import net.minecraft.world.item.component.Tool;
import net.minecraft.world.item.enchantment.EnchantmentEffectComponents;
import net.minecraft.world.item.enchantment.EnchantmentHelper;
import net.minecraft.world.level.Level;
import net.minecraft.world.phys.Vec3;

public class TridentItem extends Item implements ProjectileItem {
    public static final int THROW_THRESHOLD_TIME = 10;
    public static final float BASE_DAMAGE = 8.0F;
    public static final float PROJECTILE_SHOOT_POWER = 2.5F;

    public TridentItem(Item.Properties p_43381_) {
        super(p_43381_);
    }

    public static ItemAttributeModifiers createAttributes() {
        return ItemAttributeModifiers.builder()
            .add(Attributes.ATTACK_DAMAGE, new AttributeModifier(BASE_ATTACK_DAMAGE_ID, 8.0, AttributeModifier.Operation.ADD_VALUE), EquipmentSlotGroup.MAINHAND)
            .add(Attributes.ATTACK_SPEED, new AttributeModifier(BASE_ATTACK_SPEED_ID, -2.9F, AttributeModifier.Operation.ADD_VALUE), EquipmentSlotGroup.MAINHAND)
            .build();
    }

    public static Tool createToolProperties() {
        return new Tool(List.of(), 1.0F, 2, false);
    }

    @Override
    public ItemUseAnimation getUseAnimation(ItemStack p_43417_) {
        return ItemUseAnimation.SPEAR;
    }

    @Override
    public int getUseDuration(ItemStack p_43419_, LivingEntity p_344216_) {
        return 72000;
    }

    @Override
    public boolean releaseUsing(ItemStack p_43394_, Level p_43395_, LivingEntity p_43396_, int p_43397_) {
        if (p_43396_ instanceof Player player) {
            int i = this.getUseDuration(p_43394_, p_43396_) - p_43397_;
            if (i < 10) {
                return false;
            } else {
                float f = EnchantmentHelper.getTridentSpinAttackStrength(p_43394_, player);
                if (f > 0.0F && !player.isInWaterOrRain()) {
                    return false;
                } else if (p_43394_.nextDamageWillBreak()) {
                    return false;
                } else {
                    Holder<SoundEvent> holder = EnchantmentHelper.pickHighestLevel(p_43394_, EnchantmentEffectComponents.TRIDENT_SOUND).orElse(SoundEvents.TRIDENT_THROW);
                    player.awardStat(Stats.ITEM_USED.get(this));
                    if (p_43395_ instanceof ServerLevel serverlevel) {
                        p_43394_.hurtWithoutBreaking(1, player);
                        if (f == 0.0F) {
                            ItemStack itemstack = p_43394_.consumeAndReturn(1, player);
                            ThrownTrident throwntrident = Projectile.spawnProjectileFromRotation(ThrownTrident::new, serverlevel, itemstack, player, 0.0F, 2.5F, 1.0F);
                            if (player.hasInfiniteMaterials()) {
                                throwntrident.pickup = AbstractArrow.Pickup.CREATIVE_ONLY;
                            }

                            p_43395_.playSound(null, throwntrident, holder.value(), SoundSource.PLAYERS, 1.0F, 1.0F);
                            return true;
                        }
                    }

                    if (f > 0.0F) {
                        float f7 = player.getYRot();
                        float f1 = player.getXRot();
                        float f2 = -Mth.sin(f7 * (float) (Math.PI / 180.0)) * Mth.cos(f1 * (float) (Math.PI / 180.0));
                        float f3 = -Mth.sin(f1 * (float) (Math.PI / 180.0));
                        float f4 = Mth.cos(f7 * (float) (Math.PI / 180.0)) * Mth.cos(f1 * (float) (Math.PI / 180.0));
                        float f5 = Mth.sqrt(f2 * f2 + f3 * f3 + f4 * f4);
                        f2 *= f / f5;
                        f3 *= f / f5;
                        f4 *= f / f5;
                        player.push(f2, f3, f4);
                        player.startAutoSpinAttack(20, 8.0F, p_43394_);
                        if (player.onGround()) {
                            float f6 = 1.1999999F;
                            player.move(MoverType.SELF, new Vec3(0.0, 1.1999999F, 0.0));
                        }

                        p_43395_.playSound(null, player, holder.value(), SoundSource.PLAYERS, 1.0F, 1.0F);
                        return true;
                    } else {
                        return false;
                    }
                }
            }
        } else {
            return false;
        }
    }

    @Override
    public InteractionResult use(Level p_43405_, Player p_43406_, InteractionHand p_43407_) {
        ItemStack itemstack = p_43406_.getItemInHand(p_43407_);
        if (itemstack.nextDamageWillBreak()) {
            return InteractionResult.FAIL;
        } else if (EnchantmentHelper.getTridentSpinAttackStrength(itemstack, p_43406_) > 0.0F && !p_43406_.isInWaterOrRain()) {
            return InteractionResult.FAIL;
        } else {
            p_43406_.startUsingItem(p_43407_);
            return InteractionResult.CONSUME;
        }
    }

    @Override
    public Projectile asProjectile(Level p_330065_, Position p_333679_, ItemStack p_332911_, Direction p_333212_) {
        ThrownTrident throwntrident = new ThrownTrident(p_330065_, p_333679_.x(), p_333679_.y(), p_333679_.z(), p_332911_.copyWithCount(1));
        throwntrident.pickup = AbstractArrow.Pickup.ALLOWED;
        return throwntrident;
    }
}