Hi,

I am trying to implement "stun" mob effect which would prevent living entity to move or attack.

For prevention of attack I have used LivingAttackEvent like this:
 

    @SubscribeEvent
    public static void onAttacked(final LivingAttackEvent event) {

        // Get source of the damage.
        DamageSource damageSource = event.getSource();
        
        // Get reference to entity that caused the damage.
        Entity entity = damageSource.getEntity();

        // IF: Entity is not alive.
        if (!(entity instanceof LivingEntity)) {
            return;
        }

        // Cast entity to mob.
        LivingEntity mob = (LivingEntity)entity;
        
        // Get reference to level where entity is living.
        Level level = entity.getLevel();

        // IF: Code is executing on the client side.
        if (level.isClientSide()) {
            return;
        }

        // IF: Mob does not have stunned effect applied.
        if(!mob.hasEffect(PlayerMobEffects.STUNNED.get())){
            return;
        }
        
        // Cancel the event - prevent mob from doing anything.
        event.setCanceled(true);
    }

However this does not work as expected as mob still makes the attack but damage is not done so it does not really look like a stun - it's more like its damage is reduced to 0.

I have managed to totally block mob by canceling LivingUpdateEvent - but that has other side effects as living entity is not updated with anything - can't be damaged, can't be hit/burn by sun - basically it becomes immortal.

I have also tried with LivingSetAttackTargetEvent but this event can't be canceled.

Is there a way to just stop entity from making an attack?

Same question regarding the movement - is there a way to stop living entity from moving?

Thanks!

Maybe I am doing this the wrong way?

Is it feasible to remove AI from the mob while the effect has duration?

I.e. remove AI goals responsible for wandering and attack?

I guess I will have to deal with players and mobs differently?

Maybe you can use entity.setNoAi(true)?

15 hours ago, Adil Yilan said:

Same question regarding the movement - is there a way to stop living entity from moving?

 

Hi!

You can just set the x and z delta movement to zero. But don't change the y delta movement, otherwise the entity wouldn't fall on the ground if the block under it is removed.

Great ideas, gonna try them out and let you know if those worked.

Thanks!

Edited January 23, 20223 yr by Adil Yilan