I see this sample IExtendedEntityProperties.

 

http://mcforge.readthedocs.org/en/latest/datastorage/extendedentityproperties/#synchronizing-data-with-clients

 

but I can't understand 2 points.

 

 

1)world want add Variable, Parameter or not ?

 

2)What does the ExampleEntityPropertySync implement from? and want do Handler ?

!world.isRemote is used to check if you are on logical server side.

The var in example is a pseudocode (world can be taken from e.g: entity.worldObj).

 

EntityTracker is used to check which entities are being tracked by which player. Using it you can send update packets of entities to ONLY players that are tracking it.

ExampleEntityPropertySync is a IMessage implementation responsible for sending "this" (a custom IExtendedEntityProperties implementation) to client via SimpleNetworkWrapper. Yes - ExampleEntityPropertySync IS NOT a IEEp instance, it's a packet.

 

ExampleMod.channel.sendTo(new ExampleEntityPropertySync(this), (EntityPlayerMP)entityPlayer);

...will send mentioned above packet to given player.

 

IEEP example:

http://www.minecraftforum.net/forums/mapping-and-modding/mapping-and-modding-tutorials/1571567-1-7-2-1-6-4-eventhandler-and

SimpleNetworkWrapper example:

http://www.minecraftforum.net/forums/mapping-and-modding/mapping-and-modding-tutorials/2137055-1-7-2-customizing-packet-handling-with

Short: (packeting)

http://www.minecraftforge.net/forum/index.php/topic,20135.0.html

 

BIG NOTE:

As of 1.8.9 IEEP is DEPRECATED and then in 1.9 REMOVED from calls!

You should really update to 1.8.x and use Capabilities. (we are on 1.9 alredy).