Modifying existing mobs

[Petchy]

How do I access the mobs (specifically passive animals) in order to modify them, making them invincible for example. I'm new to minecraft modding. Thanks so much for any help.

[Petchy]

5 hours ago, diesieben07 said:

It depends on what aspects you want to modify. For invincibility there are two options:

• Subscribe to EntityJoinWorldEvent (once PR 8264 is merged use that event instead). In there call Entity#setInvulnerable(true) for all entities that you want to be invulnerable.
• Alternatively you can use LivingAttackEvent. Cancel it to prevent damage to a living entity. This allows more fine grained control.

For other aspects that you want to modify, you'll have to provide details.

Can I just ask, I wrote this quick code, should this not work? It doesn't seem to:

@EventHandler
    public void attack(LivingDamageEvent event) {
        if (event.getEntity() instanceof EntityCow) {
            event.setCanceled(true);
        }
    }

 

[Petchy]

@EventHandler
    public void attack(LivingDamageEvent event) {
        if (event.getEntity() instanceof EntityCow) {
            event.setCanceled(true);
        }
    }

I'm new to minecraft mods, why does this not trigger when I hit a cow and cancel the damage? Thank you

[MFMods]

because you didn't read the technicalities, you just copied the event handler.

make that method static and put the EventBusSubscriber annotation on the containing class.

there is a second option and it looks like you tried to follow that one, but just go with the option one (above).