I have an entity that implements IRendersAsItem so that it can be used with SpriteRenderer. However, when this entity is registered, it causes the server (but not the client) to crash with a NoClassDefFoundError saying that it cannot find this interface (which makes sense since it is annotated to indicate that it can only be loaded on the client).

 

I could remove the entity's implementation of IRendersAsItem and replace how it is currently rendered with an emulation of SpriteRenderer but I'm not sure if this would the correct way to solve this issue.

 

Current implementation of entity class:

public class EntityExplosivePotion extends ThrowableEntity implements IRendersAsItem {
    public EntityExplosivePotion(EntityType<? extends ThrowableEntity> type, World worldIn) {
        super(type, worldIn);
    }

    @Override
    public ItemStack getItem() {
        return new ItemStack(this.isSpicy() ? ModItems.SPICY_THROWABLE_EXPLOSIVE_POTION : ModItems.THROWABLE_EXPLOSIVE_POTION);
    }

    @Override
    public IPacket<?> createSpawnPacket() {
        return NetworkHooks.getEntitySpawningPacket(this);
    }
}

Registration of entity:

@EventBusSubscriber(modid = Main.MOD_ID, bus = EventBusSubscriber.Bus.MOD)
class ModSetup {
    @SubscribeEvent
    static void registerEntities(RegistryEvent.Register<EntityType<?>> event) {
        event.getRegistry().register(EntityType.Builder.<EntityExplosivePotion>create(EntityExplosivePotion::new, EntityClassification.MISC)
                .size(0.25f, 0.25f).setTrackingRange(2).setUpdateInterval(5).setShouldReceiveVelocityUpdates(true)
                .build(ModUtil.qualify(ModUtil.THROWABLE_EXPLOSIVE_POTION_NAME)).setRegistryName(ModUtil.qualify(ModUtil.THROWABLE_EXPLOSIVE_POTION_NAME)));
    }
}

Registration of entity renderer:

@EventBusSubscriber(modid = Main.MOD_ID, value = {Dist.CLIENT}, bus = EventBusSubscriber.Bus.MOD)
public class ClientProxy {
    @SubscribeEvent
    public static void init(FMLClientSetupEvent event) {
        RenderingRegistry.registerEntityRenderingHandler(EntityExplosivePotion.class, m -> new SpriteRenderer<>(m, Minecraft.getInstance().getItemRenderer()));
    }
}

 

Here is my latest.log file: https://pastebin.com/19uFbBQb

Edited February 20, 20205 yr by sanman00

@diesieben07 Thanks, that helped.

 

It turns out that that annotation needed to be added to the entity class:

@OnlyIn(
   value = Dist.CLIENT,
   _interface = IRendersAsItem.class
)
public class EntityExplosivePotion extends ThrowableEntity implements IRendersAsItem {
  // ...
}