[1.7.10] Small iMessage issue

[Frag]

Hi guys,

 

I was wondering if using EntityPlayer player = FantasticMod.proxy.getPlayerFromMessage(ctx) and Entity _ent = player.worldObj.getEntityByID(message.entityId) is a standard way to get the worldobj in iMessage. Is there any other way "safer"?

 

I am asking because sometimes the Entity returned by my line Entity _ent = player.worldObj.getEntityByID(message.entityId) is null.

 

Any cleaner way to get the entity id? I don't trust that one much...

 

@Override
public IMessage onMessage(AIStateMessage message, MessageContext ctx) 
{
	if (message!=null)
	{
		FantasticDebug.Output("MESSAGE RECEIVED. Entity: "+Integer.toString(message.entityId)+" AI State:"+Integer.toString(message.aiState));
		EntityPlayer player = FantasticMod.proxy.getPlayerFromMessage(ctx);
		if (player!=null)
		{
			Entity _ent = player.worldObj.getEntityByID(message.entityId);
			if (_ent!=null)
			{
				((EntityFantasticFish)_ent).brain.SetCurrentAIState(message.aiState);
				FantasticDebug.Output("New AIState set to: Entity: "+Integer.toString(message.entityId)+" AIState:"+Integer.toString(message.aiState));
				return null;

			}
			else
			{
				FantasticDebug.Output("Entity IS NULL! ",true);
			}


		}
		else
		{
			FantasticDebug.Output("PLAYER IS NULL!");
		}
	}
	else
	{
		FantasticDebug.Output("MESSAGE IS NULL!",true);
	}
	return null;

}

 

Here is the full message code if you want to see it...

 

package fantastic.network;


import io.netty.buffer.ByteBuf; 
import net.minecraft.entity.Entity;
import net.minecraft.entity.player.EntityPlayer; 



import cpw.mods.fml.common.network.simpleimpl.IMessage; 
import cpw.mods.fml.common.network.simpleimpl.IMessageHandler; 
import cpw.mods.fml.common.network.simpleimpl.MessageContext; 
import cpw.mods.fml.relauncher.Side; 
import fantastic.FantasticDebug;
import fantastic.FantasticMod;
import fantastic.entities.EntityFantasticFish;


public class AIStateMessage implements IMessage, IMessageHandler<AIStateMessage, IMessage> 
{ 
    private int entityId;
    private int aiState;


    public AIStateMessage() 
    { 
    } 


    public AIStateMessage(int anEntityId,int anAIState) 
    { 
        entityId=anEntityId;
        aiState=anAIState;


    } 


    @Override 
    public void fromBytes(ByteBuf buf) 
    { 
        entityId = buf.readInt(); 
        aiState = buf.readInt(); 
    } 


    @Override 
    public void toBytes(ByteBuf buf) 
    { 
        buf.writeInt(entityId); 
        buf.writeInt(aiState); 
    } 


@Override
public IMessage onMessage(AIStateMessage message, MessageContext ctx) 
{
	if (message!=null)
	{
		FantasticDebug.Output("MESSAGE RECEIVED. Entity: "+Integer.toString(message.entityId)+" AI State:"+Integer.toString(message.aiState));
		EntityPlayer player = FantasticMod.proxy.getPlayerFromMessage(ctx);
		if (player!=null)
		{
			Entity _ent = player.worldObj.getEntityByID(message.entityId);
			if (_ent!=null)
			{
				((EntityFantasticFish)_ent).brain.SetCurrentAIState(message.aiState);
				FantasticDebug.Output("New AIState set to: Entity: "+Integer.toString(message.entityId)+" AIState:"+Integer.toString(message.aiState));
				return null;

			}
			else
			{
				FantasticDebug.Output("Entity IS NULL! ",true);
			}


		}
		else
		{
			FantasticDebug.Output("PLAYER IS NULL!");
		}
	}
	else
	{
		FantasticDebug.Output("MESSAGE IS NULL!",true);
	}
	return null;

} 
} 

[Frag]

EntityPlayer player = FantasticMod.proxy.getPlayerFromMessage(ctx)

I have no idea what this does.

The entity will be null if no entity with that ID exists on the client. Show where you send the packet.

 

Actually I just want to get the worldobj object. Where can I get it from when in an iMessage?

[TrashCaster]

EntityPlayer player = FantasticMod.proxy.getPlayerFromMessage(ctx)

I have no idea what this does.

The entity will be null if no entity with that ID exists on the client. Show where you send the packet.

 

Actually I just want to get the worldobj object. Where can I get it from when in an iMessage?

 

That depends. Are you calling that from the server side, or the client side?

[Frag]

EntityPlayer player = FantasticMod.proxy.getPlayerFromMessage(ctx)

I have no idea what this does.

The entity will be null if no entity with that ID exists on the client. Show where you send the packet.

 

Actually I just want to get the worldobj object. Where can I get it from when in an iMessage?

 

That depends. Are you calling that from the server side, or the client side?

 

Thanks for the help TrashCaster. On the client side.

 

I have a simple need, I am trying to get the worldobj from the clientside when the message is received so I can find the entity from its ID. Look at my 2 lines in bold. The first one get me the player, in the second one, I use the player to get the world object to find the entity with it. But I hate that method. I am pretty sure there a more effective way to get the entity from its ID. Tons of people use iMessage, just did not find an example where the Entity is found clientside from its ID.

 

@Override

public IMessage onMessage(AIStateMessage message, MessageContext ctx)

{

if (message!=null)

{

FantasticDebug.Output("MESSAGE RECEIVED. Entity: "+Integer.toString(message.entityId)+" AI State:"+Integer.toString(message.aiState));

EntityPlayer player = FantasticMod.proxy.getPlayerFromMessage(ctx);

if (player!=null)

{

Entity _ent = player.worldObj.getEntityByID(message.entityId);

if (_ent!=null)

{

((EntityFantasticFish)_ent).brain.SetCurrentAIState(message.aiState);

FantasticDebug.Output("New AIState set to: Entity: "+Integer.toString(message.entityId)+" AIState:"+Integer.toString(message.aiState));

return null;

 

}

else

{

FantasticDebug.Output("Entity IS NULL! ",true);

}

 

 

}

else

{

FantasticDebug.Output("PLAYER IS NULL!");

}

}

else

{

FantasticDebug.Output("MESSAGE IS NULL!",true);

}

return null;

 

}

[Frag]

Why do you "hate" that method? It is the correct way to do this.

 

Checking player and message for null is pointless, they won't be.

 

I just realized, while talking about it, that in a multiplayer environment, it will happen a lot that an entity will exist and will have some value set server side BEFORE a new client connects.

 

Question. When a client connect, does ALL variables set server side will be fully synch with the brand new client side when it will connect?

[Ernio]

Why do you "hate" that method? It is the correct way to do this.

 

Checking player and message for null is pointless, they won't be.

 

I just realized, while talking about it, that in a multiplayer environment, it will happen a lot that an entity will exist and will have some value set server side BEFORE a new client connects.

 

Question. When a client connect, does ALL variables set server side will be fully synch with the brand new client side when it will connect?

 

Was about to comment you before-edit post...

 

As to current one: NO

Setting stuff and sending it, will not magically tell server to auto-send it whenever it is needed.

 

There are few things to look at here:

 

PlayerEvent.StartTracking - fired on server whenever Player starts tracking some event.target entity.

You can use this to instantly send data you need t obe synced. Situations: Some player logs i world where there are a lot of some fishes or whatever. Since this event fires for each entity being tracked you can send update about every singe fish that appeared in players area.

 

PlayerLoggedInEvent - previous event fires when you start tracking other entities, not yourself. This event is precisely for that. There are also: RespawnEvent and ChangedDimensionEvent. Or you can go "fk this" and use EntityJoinWorld event to sent packets needed.

 

EntityTracker - you can utilize it to send packet about some entity to all players currently tracking given entity. Think of it as a very sophisticated "sendToAllAround" which actually sends data to players who need it.