src/game/java/net/minecraft/client/renderer/item/BundleSelectedItemSpecialRenderer.java

package net.minecraft.client.renderer.item;

import com.mojang.serialization.MapCodec;
import javax.annotation.Nullable;
import net.minecraft.client.multiplayer.ClientLevel;
import net.minecraft.client.resources.model.ResolvableModel;
import net.minecraft.world.entity.LivingEntity;
import net.minecraft.world.item.BundleItem;
import net.minecraft.world.item.ItemDisplayContext;
import net.minecraft.world.item.ItemStack;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;

@OnlyIn(Dist.CLIENT)
public class BundleSelectedItemSpecialRenderer implements ItemModel {
    static final ItemModel INSTANCE = new BundleSelectedItemSpecialRenderer();

    @Override
    public void update(
        ItemStackRenderState p_375851_,
        ItemStack p_377952_,
        ItemModelResolver p_377301_,
        ItemDisplayContext p_378331_,
        @Nullable ClientLevel p_375875_,
        @Nullable LivingEntity p_376498_,
        int p_378061_
    ) {
        ItemStack itemstack = BundleItem.getSelectedItemStack(p_377952_);
        if (!itemstack.isEmpty()) {
            p_377301_.appendItemLayers(p_375851_, itemstack, p_378331_, p_375875_, p_376498_, p_378061_);
        }
    }

    @OnlyIn(Dist.CLIENT)
    public static record Unbaked() implements ItemModel.Unbaked {
        public static final MapCodec<BundleSelectedItemSpecialRenderer.Unbaked> MAP_CODEC = MapCodec.unit(new BundleSelectedItemSpecialRenderer.Unbaked());

        @Override
        public MapCodec<BundleSelectedItemSpecialRenderer.Unbaked> type() {
            return MAP_CODEC;
        }

        @Override
        public ItemModel bake(ItemModel.BakingContext p_375854_) {
            return BundleSelectedItemSpecialRenderer.INSTANCE;
        }

        @Override
        public void resolveDependencies(ResolvableModel.Resolver p_378142_) {
        }
    }
}