A question about Datawatcher and entities

[MrCredits]

Hi everyone.

 

I've been studying the vanilla mob entities source lately. What's utilized frequently is the Datawatcher class. Now, I did some looking into it on my own and learned a bit about how it operates. (Which is I believe to sync entities with the server) Despite that, I have a few questions of my own. Namely:

 

Is my premise on the purpose of Datawatcher incorrect? Please correct me if so/

 

If that is not the case, and Datawatcher is responsible for syncing entities, is it possible to substitute and instead utilize packets?

 

Thanks, I very much appreciate any insight!

 

 

 

 

 

 

[GotoLink]

No, then yes, but keep in mind that datawatcher is a built-in solution (so it works faster and is globally easier to use, but may conflict with vanilla entities) while packets are custom (separate, but slower...).

[MineMaarten]

To add to that, I've previously tried to sync server- and client sided entities with packets, but I wasn't able to figure out how to add info in the packet that would identify for which entity the packet was for. There is a thing in entities called the EntityID, but these are different for the client and server (as far as I tested it). Sending the position of the entity with the packet is unreliable, as these are one of the variables that need to be synched, plus it could be very possible that there are two entities at the same position.

 

After all this messing around I found out what datawatchers do .

[GotoLink]

I think the identifier you would need is the UUID. Though I never tested this.

 

[MineMaarten]

Isn't that the brand new ID used in entity attributes? And isn't that the same for every entity of the same type? But I haven't tested that myself either. Let's stick with datawatchers .

[hydroflame]

wait wait, you guys telling me that entityID ISNT always refering the same entity server and client side ?

 

like suppose i spawn a new derpysquid entity, it *might* not have the same entityID on both side, if not what are you suppose to use to sync entities ? (you mentionned a UUID earlier :\)

[MrCredits]

Hmm, I was under the impression that each entity had a already unique ID in the world's "loadedentitylist"? Well, perhaps, not the actual entity ID, but rather a hashcode?

 

Anyhow, I'd actually prefer not to use datawatchers. Primarily reason being, like Goto said, most are already occupied by vanilla mobs.

 

[Air_Gamer]

Isn't entityId unique to each instance of an entity, but matched between client and server?

 

It is possible to send packets to sync data between. See this tutorial (

)

[MineMaarten]

Then I've confused some of you. Sorry for that! I must have done something wrong whilst testing.

[hydroflame]

@airGamer well i was using entityID so far to sync between client/server but if its not the right way then my mod has possibly some HUGE bug right now :\