Like in topic i want to save some data to player but i have no idea how to do this

Use the Capability system.

 

For examples, you can look at the capabilities provided by Forge (look for usages of

CapabilityManager#register

), the capability test mod or my own mod's capabilities (API, implementation).

is there a way to use NBTTag?

is there a way to use NBTTag?

 

NBT should only be used to save data, it shouldn't be used to store it at runtime.

ok but is this possible to use the NBTTag?

I believe you don't fully understand how data should be stored on players. Well - I might be wrong, but worth asking

 

Saving data to player data files is different from assigning data to player when he is online.

 

It would help us help you if you would describe your end goal and what you want to store.

i have a variable and i need to save it and i have no idea how to use capabilities

i have a variable and i need to save it and i have no idea how to use capabilities

Read the docs

http://mcforge.readthedocs.io/en/latest/datastorage/capabilities/

can anyone explain this Capabilities system step-by-step because i spend like a 2 weeks to try to figure it out by myself

what i shloud do? Create own capability or use existing one?

Do any of the existing capabilities (

IItemHandler

,

IFluidHandler

,

IAnimationStateMachine

) match the data you want to store?

 

If they do, use them. If they don't, create your own.

What if i want to Store a int and a boolean shloud i create 2 capabilities?

few questions:

 

1.Where i shloud register my capabliity

2.i have an error when i am trying to register a capability

eclipse marks this with red line:

CapabilityManager.INSTANCE.register(PlayerDataCapabilityClass.PlayerDataCapability.class, PlayerDataCapabilityClass.PlayerDataCapabilityStorage.class, PlayerDataCapabilityClass.PlayerDataCapabilityFactory.class);

PlayerDataCapabilityClass.java:

public class PlayerDataCapabilityClass {

public interface PlayerDataCapability {



}

public static class PlayerDataCapabilityStorage implements Capability.IStorage<PlayerDataCapability> {

	  @Override
	  public NBTBase writeNBT(Capability<PlayerDataCapability> capability, PlayerDataCapability instance, EnumFacing side) {
		return null;
	    // return an NBT tag
	  }

		@Override
		public void readNBT(Capability<PlayerDataCapability> capability, PlayerDataCapability instance, EnumFacing side,
				NBTBase nbt) {
			// TODO Auto-generated method stub

		}

}

public static class PlayerDataCapabilityFactory implements Callable<PlayerDataCapability> {

	  @Override
	  public PlayerDataCapability call() throws Exception {
		  
	    return null;
	    
	  }
	  
}


}

 

few questions:

 

1.Where i shloud register my capabliity

2.i have an error when i am trying to register a capability

eclipse marks this with red line:

CapabilityManager.INSTANCE.register(PlayerDataCapabilityClass.PlayerDataCapability.class, PlayerDataCapabilityClass.PlayerDataCapabilityStorage.class, PlayerDataCapabilityClass.PlayerDataCapabilityFactory.class);

PlayerDataCapabilityClass.java:

public class PlayerDataCapabilityClass {

public interface PlayerDataCapability {



}

public static class PlayerDataCapabilityStorage implements Capability.IStorage<PlayerDataCapability> {

	  @Override
	  public NBTBase writeNBT(Capability<PlayerDataCapability> capability, PlayerDataCapability instance, EnumFacing side) {
		return null;
	    // return an NBT tag
	  }

		@Override
		public void readNBT(Capability<PlayerDataCapability> capability, PlayerDataCapability instance, EnumFacing side,
				NBTBase nbt) {
			// TODO Auto-generated method stub

		}

}

public static class PlayerDataCapabilityFactory implements Callable<PlayerDataCapability> {

	  @Override
	  public PlayerDataCapability call() throws Exception {
		  
	    return null;
	    
	  }
	  
}


}

Listen to eclipse it is probably an invalid arguement.

It says

"The method register(Class<T>, Capability.IStorage<T>,Class<? extends T>) is not applicable for arguments(Class<PlayerDataCapabilityClass.PlayerDataCapability>,Class<PlayerDataCapabilityClass.PlayerDataCapabilityStorage>,Class<PlayerDataCapabilityClass.PlayerDataCapabilityFactory>)"

 

1.Where i shloud register my capabliity

Register it in preInit from your

@Mod

class or a class called from it.

 

 

2.i have an error when i am trying to register a capability

There are two overloads of

CapabilityManager#registerCapability

that take a different third argument:

• One takes the

  Class

  of the capability interface's default implementation
  

• One takes an instance of

  Callable

  that returns an instance of the default implementation

 

You're trying to pass the

Class

of the

Callable

implementation, which is incorrect.

 

You haven't actually added any methods to your capability interface or implemented any of the methods in your

IStorage

and

Callable

implementations.

So i need to pass a PlayerDataCapabilityClass.PlayerDataCapabilityFactory.this as a third argument?

So i need to pass a PlayerDataCapabilityClass.PlayerDataCapabilityFactory.this as a third argument?

 

No, you need to create an instance of

PlayerDataCapabilityClass.PlayerDataCapabilityFactory

and pass that as the third argument.

ok i have created and registered capability but how do i use it?

ok i have created and registered capability but how do i use it?

 

Call

ICapabilityProvider#getCapability

to get the instance of your handler attached to the provider.

 

Every

Entity

(including

EntityPlayer

) is an

ICapabilityProvider

.

ok i have created and registered capability but how do i use it?

 

Call

ICapabilityProvider#getCapability

to get the instance of your handler attached to the provider.

 

Every

Entity

(including

EntityPlayer

) is an

ICapabilityProvider

.

where i need to call this and how do i read/write the data?

where i need to call this and how do i read/write the data?

 

Call it whenever you want to access your handler instance (i.e. the instance of

PlayerDataCapability

). This handler instance stores the data, you need to create methods in your interface to interact with the data (read/write it).

 

The

ICapabilitySerializable

is responsible for reading the handler from and writing the handler to NBT.

can you show me an example?

can you show me an example?

 

I linked several examples here.

i have this code:

package pl.minepack.gym.capabilities;

import java.util.concurrent.Callable;

import net.minecraft.nbt.NBTBase;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.util.EnumFacing;
import net.minecraftforge.common.capabilities.Capability;

public class PlayerDataCapabilityClass {

public interface PlayerDataCapability {

	int Strength = 0;

	public int addStrength(int count);
	public int subStrength(int count);

	public void setStrength(int count);
	public int getStrength();

}

public static class PlayerDataCapabilityStorage implements Capability.IStorage<PlayerDataCapability> {

	  @Override
	  public NBTBase writeNBT(Capability<PlayerDataCapability> capability, PlayerDataCapability instance, EnumFacing side) {
		  NBTTagCompound nbt = new NBTTagCompound();
		  
		  nbt.setInteger("Strength", instance.getStrength());
		  
		  return nbt;
	  }

		@Override
		public void readNBT(Capability<PlayerDataCapability> capability, PlayerDataCapability instance, EnumFacing side,
				NBTBase nbt) {

			instance.setStrength(((NBTTagCompound)nbt).getInteger("Strength"));

		}

}

public static class PlayerDataCapabilityFactory implements PlayerDataCapability {

	private int Strength = 0;

	@Override
	public int addStrength(int count) {

		return this.Strength += count;
	}

	@Override
	public int subStrength(int count) {

		return this.Strength -= count;
	}

	@Override
	public void setStrength(int count) {

		this.Strength = count;

	}

	@Override
	public int getStrength() {
		// TODO Auto-generated method stub
		return this.Strength;
	}  
}


}

and what now?