[SOLVED][1.8] How do I assign NBT Values to other items in an Inventory?

[Tut]

I'm attempting to use the well-known "Coordinate Cache" item to assign NBT values to another item.

 

Here's the Coordinate Cache item Class:

 

package com.example.ubiquity.items;

import java.util.List;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.util.BlockPos;
import net.minecraft.util.EnumChatFormatting;
import net.minecraft.util.EnumFacing;
import net.minecraft.world.World;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;

public class SwordCache extends Item{
@Override
public boolean onItemUse(ItemStack stack, EntityPlayer playerIn, World worldIn, BlockPos pos, EnumFacing side, float hitX, float hitY, float hitZ)
{
	if(!playerIn.isSneaking()){
		if(stack.getTagCompound() == null ){
			stack.setTagCompound(new NBTTagCompound());
		}
		NBTTagCompound posnbt = new NBTTagCompound();
		posnbt.setInteger("posX", pos.getX());
		posnbt.setInteger("posY", pos.getY());
		posnbt.setInteger("posZ", pos.getZ());
		stack.getTagCompound().setTag("coords", posnbt);
		stack.setStackDisplayName(EnumChatFormatting.GOLD + "Ubiquitous Link");
	}return true;
}
@Override
public ItemStack onItemRightClick(ItemStack stack, World worldIn, EntityPlayer playerIn){
if (playerIn.isSneaking()){
		if(stack.getTagCompound() != null){
			stack.getTagCompound().removeTag("coords");
			stack.clearCustomName();
		}
	}
	return stack;
}
@Override
@SideOnly(Side.CLIENT)
@SuppressWarnings("unchecked")
public void addInformation(ItemStack stack, EntityPlayer playerIn, List list, boolean advanced){
	if(stack.getTagCompound() != null){
		if(stack.getTagCompound().hasKey("coords")){
			NBTTagCompound posnbt = (NBTTagCompound) stack.getTagCompound().getTag("coords");
			int posX = posnbt.getInteger("posX");
			int posY = posnbt.getInteger("posY");
			int posZ = posnbt.getInteger("posZ");
			list.add("This item is bound to");
			list.add("X: " + posX + " Y: " + posY + " Z: " + posZ);
		}
	}
}
@Override
@SideOnly(Side.CLIENT)
public boolean hasEffect(ItemStack stack){
	NBTTagCompound nbtTagCompound = stack.getTagCompound();
	if(nbtTagCompound != null){
		return stack.getTagCompound().hasKey("coords");
	}
	return stack.isItemEnchanted();
}
}

 

My question is about this line in the OnItemUse method...

if(!playerIn.isSneaking()){

 

How can I change this to see if the player has another item, called "Coordinate Key", and then store the following NBT information in said item?

[coolAlias]

Iterate through the player's inventory and, if you find the ItemStack containing said item, you can add NBT to it with the instance you have from your for loop.

 

Pseudo-code with potentially dodgy syntax:

for (ItemStack stack : player.inventory) {
  if (stack != null && stack.getItem() == itemYouWant) {
     // modify and/or set the stack's tag compound
  }
}

[Tut]

Iterate through the player's inventory and, if you find the ItemStack containing said item, you can add NBT to it with the instance you have from your for loop.

 

Pseudo-code with potentially dodgy syntax:

for (ItemStack stack : player.inventory) {
  if (stack != null && stack.getItem() == itemYouWant) {
     // modify and/or set the stack's tag compound
  }
}

 

How would I parse itemYouWant?

[coolAlias]

Items.stick? Items.apple? YourModItems.crystalKey? Whichever Item you are searching for. And be sure to put a

'break;' statement after you find it, since you don't need to keep looking.

[Tut]

Items.stick? Items.apple? YourModItems.crystalKey? Whichever Item you are searching for. And be sure to put a

'break;' statement after you find it, since you don't need to keep looking.

 

Ah, okay. I was specifically talking about defining a mod item, wasn't sure how to do that, sorry!