good nights 
i made a custome lance item and need to make it has a longer reach soo it can hurt zombies at 6 or 7 meters  the SwordItem only has 4 maybe 5 meters reach 

 

Spoiler

package merctool.item;

import com.google.common.collect.ImmutableMultimap;
import com.google.common.collect.Multimap;
import net.minecraft.core.BlockPos;
import net.minecraft.tags.BlockTags;
import net.minecraft.world.InteractionHand;
import net.minecraft.world.InteractionResult;
import net.minecraft.world.InteractionResultHolder;
import net.minecraft.world.entity.EquipmentSlot;
import net.minecraft.world.entity.LivingEntity;
import net.minecraft.world.entity.ai.attributes.Attribute;
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.item.Item;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.item.SwordItem;
import net.minecraft.world.item.Tier;
import net.minecraft.world.item.Vanishable;
import net.minecraft.world.item.context.UseOnContext;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.block.Blocks;
import net.minecraft.world.level.block.state.BlockState;
import net.minecraft.world.level.material.Material;

public class LanceItem extends SwordItem implements Vanishable {
   private final float attackDamage;
   private final Multimap<Attribute, AttributeModifier> defaultModifiers;

   public LanceItem(Tier p_43269_, int p_43270_, float p_43271_, Item.Properties p_43272_) {
      super(p_43269_, p_43270_, p_43271_, p_43272_);
      this.attackDamage = (float)p_43270_ + p_43269_.getAttackDamageBonus();
      ImmutableMultimap.Builder<Attribute, AttributeModifier> builder = ImmutableMultimap.builder();
      builder.put(Attributes.ATTACK_DAMAGE, new AttributeModifier(BASE_ATTACK_DAMAGE_UUID, "Weapon modifier", (double)this.attackDamage, AttributeModifier.Operation.ADDITION));
      builder.put(Attributes.ATTACK_SPEED, new AttributeModifier(BASE_ATTACK_SPEED_UUID, "Weapon modifier", (double)p_43271_, AttributeModifier.Operation.ADDITION));
      this.defaultModifiers = builder.build();
   }

   public float getDamage() {
      return this.attackDamage;
   }

   public boolean canAttackBlock(BlockState p_43291_, Level p_43292_, BlockPos p_43293_, Player p_43294_) {
	   System.out.println("canAttackBlock");
	   
	   
      return !p_43294_.isCreative();
   }

   public float getDestroySpeed(ItemStack p_43288_, BlockState p_43289_) {
      if (p_43289_.is(Blocks.COBWEB)) {
         return 15.0F;
      } else {
         Material material = p_43289_.getMaterial();
         return material != Material.PLANT && material != Material.REPLACEABLE_PLANT && !p_43289_.is(BlockTags.LEAVES) && material != Material.VEGETABLE ? 1.0F : 1.5F;
      }
   }

   public boolean hurtEnemy(ItemStack p_43278_, LivingEntity p_43279_, LivingEntity p_43280_) {
	   System.out.println("hurtEnemy");
	   
      p_43278_.hurtAndBreak(1, p_43280_, (p_43296_) -> {
         p_43296_.broadcastBreakEvent(EquipmentSlot.MAINHAND);
      });
      return true;
   }

   public boolean mineBlock(ItemStack p_43282_, Level p_43283_, BlockState p_43284_, BlockPos p_43285_, LivingEntity p_43286_) {
	   System.out.println("mineBlock");
	   
      if (p_43284_.getDestroySpeed(p_43283_, p_43285_) != 0.0F) {
         p_43282_.hurtAndBreak(2, p_43286_, (p_43276_) -> {
            p_43276_.broadcastBreakEvent(EquipmentSlot.MAINHAND);
         });
      }

      return true;
   }

   public boolean isCorrectToolForDrops(BlockState p_43298_) {
      return p_43298_.is(Blocks.COBWEB);
   }

   public Multimap<Attribute, AttributeModifier> getDefaultAttributeModifiers(EquipmentSlot p_43274_) {
      return p_43274_ == EquipmentSlot.MAINHAND ? this.defaultModifiers : super.getDefaultAttributeModifiers(p_43274_);
   }

   @Override
   public boolean canPerformAction(ItemStack stack, net.minecraftforge.common.ToolAction toolAction) {
	   System.out.println("canPerformAction");
      return net.minecraftforge.common.ToolActions.DEFAULT_SWORD_ACTIONS.contains(toolAction);
   }
   
   @Override
   public InteractionResult useOn(UseOnContext p_41427_) {
	   System.out.println("useOn");
	      return InteractionResult.PASS;
	   }
   
   @Override
   public InteractionResultHolder<ItemStack> use(Level p_41432_, Player p_41433_, InteractionHand p_41434_) {
	   System.out.println("use");
	      ItemStack itemstack = p_41433_.getItemInHand(p_41434_);
	      if (itemstack.isEdible()) {
	         if (p_41433_.canEat(itemstack.getFoodProperties(p_41433_).canAlwaysEat())) {
	            p_41433_.startUsingItem(p_41434_);
	            return InteractionResultHolder.consume(itemstack);
	         } else {
	            return InteractionResultHolder.fail(itemstack);
	         }
	      } else {
	         return InteractionResultHolder.pass(p_41433_.getItemInHand(p_41434_));
	      }
	   }
   
   
   @Override
   public net.minecraft.world.InteractionResult interactLivingEntity(ItemStack stack, net.minecraft.world.entity.player.Player playerIn, LivingEntity entity, net.minecraft.world.InteractionHand hand) {
	   System.out.println("interactLivingEntity");

	   return net.minecraft.world.InteractionResult.SUCCESS;
   }
	   
}

 

 

lokking into mi old code the function name was 

    public boolean onEntitySwing(EntityLivingBase shootingEntity, ItemStack pistola) 

 

soo what function is trigered on left click ?

 

 

 

 

 

Maybe this?

https://github.com/MinecraftForge/MinecraftForge/blob/d176bab28e265263908b0bb509a23734d0d53516/src/main/java/net/minecraftforge/common/ForgeMod.java#L158

i.e. use LivingEquipmentChangeEvent to add/remove AttributeModifiers to the player when it is your lance.

 

thanks for asking 
i was looking to the forge class code and see the attributes  and seems complicated to get them change them and apply to player also the original value needs to be stored somehow soo it can be restored when player deselect the lance 

 

event its the easy part 

    @SubscribeEvent
    public static void on_using_lance(LivingEquipmentChangeEvent event) {

        ItemStack itemstack = event.getTo();
        Entity entity = event.getEntity();
        Level warudo = entity.level;
        if (entity instanceof Player) {

            // if (itemstack.getItem() == ItemInit.LANCE_STEEL.get() &&
            // !warudo.isClientSide) {
            if (itemstack.getItem() instanceof LanceItem && !warudo.isClientSide) {
                System.out.println("\nEs una lanza\n");
                 //IForgePlayer.getReachDistance();
            }

            else {

                     //set back the original values 

            }

        }

    }

 

 

i need help whi the forge class part 

but also really really theres no replace to detect when players leftclick whit an item ?

 

You can see how to apply attribute modifiers in for example Horse.setArmourEquipment() it's not complicated at all.

It's also the correct way to do it.

 

The swing method still exists:

https://github.com/MinecraftForge/MinecraftForge/blob/d176bab28e265263908b0bb509a23734d0d53516/src/main/java/net/minecraftforge/common/extensions/IForgeItem.java#L394

That's a policy hook to control animations, not for ad hoc processing.

Edited December 24, 20222 yr by warjort