Item qui devient invisible quand on le tien

[data]

bonjour jais un problème avec le code de mon mod.

package fr.yalouor.yalouor.item.stick;

import java.util.Set;

import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Sets;

import fr.yalouor.yalouor.ModYalouor;
import fr.yalouor.yalouor.Reference;
import fr.yalouor.yalouor.init.ItemsMod;
import net.minecraft.block.Block;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.entity.Entity;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.init.Blocks;
import net.minecraft.item.ItemPickaxe;
import net.minecraft.item.ItemStack;
import net.minecraft.potion.Potion;
import net.minecraft.potion.PotionEffect;
import net.minecraft.world.World;

public class stick_inv extends ItemPickaxe {		

	public stick_inv(ToolMaterial string) {
		super(string);
	}

	
	private static Set<Block> effectivaAgainst = Sets.newHashSet(new Block[]
			{
			});
	
	@Override
	public Set<String> getToolClasses(ItemStack stack){
		return ImmutableSet.of("pickaxe");
	}
	
	@Override
	public boolean canHarvestBlock(Block block, ItemStack stack)
	{
		return effectivaAgainst.contains(block) ? true : super.canHarvestBlock(block, stack);
	}
	
	@Override
	public float func_150893_a(ItemStack stack, Block block)
	{
		return effectivaAgainst.contains(block) ? this.efficiencyOnProperMaterial : super.func_150893_a(stack, block);
	}
	public void onUpdate(ItemStack stack, World world, Entity entity, int i, boolean flag) {
        super.onUpdate(stack, world, entity, i, flag);

        EntityPlayer player = (EntityPlayer) entity;
        ItemStack hand = player.getCurrentEquippedItem();
        if (hand == stack) {
            player.addPotionEffect(new PotionEffect(Potion.invisibility.id, 10, 10, true));
            
        }
    }
public boolean getIsRepairable(ItemStack input, ItemStack repair) {
        if ((input.getItem() == this) && (repair.getItem() == ItemsMod.stick_speed)) {
            return true;
        }
        return false;
    }

}

je voudrais que au moment ou le Player devine invisible le stick aussi donc le changer de texture

merci a la personne qui pourra m’aider