I have a keybind that will damage entities and of course keybinds are client-side. If I use entity.attackEntityFrom() it doesn't work because that is a server-side function. Is there a packet built in to damage entities or do I need to write my own one?

For the packet how do I serialise the Entity as NBT?

Here is the packet:

package com.leo.lbacraft.network;

import io.netty.buffer.ByteBuf;
import net.minecraft.client.Minecraft;
import net.minecraft.util.DamageSource;
import net.minecraftforge.fml.common.network.simpleimpl.IMessage;
import net.minecraftforge.fml.common.network.simpleimpl.IMessageHandler;
import net.minecraftforge.fml.common.network.simpleimpl.MessageContext;

public class PacketDamageEntity implements IMessage {
	public static class Handler implements IMessageHandler<PacketDamageEntity, IMessage> {
		@Override
		public IMessage onMessage(PacketDamageEntity message, MessageContext ctx) {
			System.out.println("Server" + message.ID);
			
			Minecraft.getMinecraft().world.getEntityByID(message.ID).attackEntityFrom(DamageSource.MAGIC, message.damage);
			
			return null;
		}
		
	}
	
	public int ID;
	public float damage;
	
	public PacketDamageEntity() {
		
	}
	
	public PacketDamageEntity(int ID, float damage) {
		this.ID = ID;
		this.damage = damage;
	}
	
	@Override
	public void fromBytes(ByteBuf buf) {
		ID = buf.readInt();
		damage = buf.readFloat();
	}

	@Override
	public void toBytes(ByteBuf buf) {
		buf.writeInt(ID);
		buf.writeFloat(damage);
	}

}

It still doesn't damage the entities.

On 7/22/2017 at 5:16 AM, diesieben07 said:

• Read the warning on the networking docs.
• Minecraft::world is the client world. What you are doing here is known as "reaching across logical sides" and it does not work.

I think I'm having a similar problem, I'm trying to do:

 

boolean isSuccessfulAttack = target.attackEntityFrom(DamageSource.causePlayerDamage(player), damage);

 

But that doesn't work. Then I read this thread and thought it might work if I call it from the server but I don't know how to do that, I tried:

 

boolean isSuccessfulAttack = Minecraft.getMinecraft().getIntegratedServer().getEntityFromUuid(target.getUniqueID()).attackEntityFrom(DamageSource.causePlayerDamage(player), damage);

 

But that doesn't work either. I know about client side and server side and I have my proxies setup but I'm trying to do this in my event handler class so what should I do?