[1.8] override vanilla item method

[zlotnleo]

Is there a way to override a vanilla item method without editing the base classes or do I have to create my own item with the same properties and replace the vanilla one with my own?

[Ernio]

Unless you know ASM, which is overkill, there is not.

 

What is your goal - you might be able to use Events to do something.

[zlotnleo]

I want a vanilla item to change into an item from my mod when dropped in water. For that I need to override onEntityItemUpdate(EntityItem) method.

[zlotnleo]

I think I understand how the method should work, however I can't get the EntityJoinWorldEvent to be called at proper places

[zlotnleo]

In a class called ChangeDefaults I've got this:

 

 

public static void entityJoinEvent(EntityJoinWorldEvent event)

    {

        if (event.entity instanceof EntityItem)

        {

            EntityItem entityItem = (EntityItem) event.entity;

            if (entityItem.getEntityItem().getItem() == Items.coal)

                if (entityItem.worldObj.getBlockState(new BlockPos((int) Math.floor(entityItem.posX), (int) Math.floor(entityItem.posY), (int) Math.floor(entityItem.posZ))).getBlock() == Blocks.water)

                {

                    entityItem.setEntityItemStack(new ItemStack(entityItem.getEntityItem().getMetadata() == 0 ? ModItems.wetCoal : ModItems.wetCharcoal, 1, 0));

                }

        }

    }

 

 

 

In the main mod class is where I get stuck. I tried this:

 

 

@Mod.EventHandler

public void entityJoinWorld(EntityJoinWorldEvent event)

{

    ChangeDefaults.entityJoinEvent(event);

}

 

 

[Ernio]

@SubscribeEvent

 

Not @EventHandler

[zlotnleo]

Still doesn't work. That method is not being called. And also, as far as I understand, Entity join happens once for every new dropped item. And that is not what I want to do. Basically, I'm just asking whether my code will work or not to turn any coal/charcoal into wet one?

[Ernio]

Forge has only access to LivingUpdates (LivingUpdateEvent), BUT there is also event that would allow you to get access to non-living entities.

 

EntityEvent.CanUpdate

Would allow you to run code when ANY Entity is being updated.

 

Note that I have NO IDEA what will actually happen - never used it, but seems like it would work.

 

@SubscribeEvent should work. You also need to register MyEvent.class

FMLCommonHandler.instance().bus().register(new FMLEvents());
MinecraftForge.EVENT_BUS.register(new ForgeEvents());

 

Use one of those in preInit of common proxy. ("one of" - depending what events are you using, events can be recognized by package).

 

EDIT

If my wild idea (EntityEvent.CanUpdate) won't work - then you need to extend EntityItem as mentioned before. Only way

[zlotnleo]

Well, neither FMLEvents nor ForgeEvents class seems to exist

[Ernio]

You need to make it.

 

You create class with methods in it that have @SubscribeEvent on them.

 

EDIT

There are tons of tuts on how to use events. Look them up please.

[zlotnleo]

Well, seems like a lot to be understood and rethought. I will probably look deeper into it tomorrow.