For the mod I'm making, I need to know how to save extra data to the player. Is there a way for me to do it with NBT data? I'm going to need to save 3 integers and a byte. If anyone knows how I can do this, please let me know. If I need to save it to a custom external file, how would I set up the directory for the file? I already know how to save and read from external files.

Assuming you have an instance of EntityPlayer (we'll call this 'player'), you can use player.getEntityData() and do whatever you need to there.

that's a good idea. I'll try it out and get back to you.

it always says zero. it should say 100 but it doesn't. The latest commit on the github has all the changes that were made, so here.

https://github.com/code-lyoko-modding/CodeLyokoMod/commit/105e5f010864436fc397648adbeab71496e5577a

By default, getting an object from an NBTTagCompound will return 0 if the key doesn't exist. You might try using hasKey checks. I haven't had any problems with this before, so here's what I would do:

 

if(player.getEntityData().hasKey("lifePoints"))

{

    //do stuff

}

now nothing appears. how to I add an NBTTagCompound to the player?

Never Mind. I figured out how to add an stuff to NBT, but it still doesn't show up. latest commit.

https://github.com/code-lyoko-modding/CodeLyokoMod/commit/34b00755699bc74678efc74bfbfbe216f98066bb