On my LivingDeathEvent, it just started to crash after I removed if(!event.world.isRemote) (it was placed above the checker if statement) and now it is crashing when i kill a mob the cause is the

"if(event.source.getSourceOfDamage() instanceof EntityPlayer && p.getHeldItem().getItem() instanceof ItemSword){"

 

And before that was crashing, it would crash when a mob would kill itself in lava or something! I don't know why it would crash on that, because I'm only checking if the source was the player and if the player is holding a sword.

 

Here is my event (I would put it in a code spoiler but I'm new to the forge forums and idk how to!)

 

 

 

@SubscribeEvent

public void onKilledMob(LivingDeathEvent event){

EntityPlayer p = (EntityPlayer)event.source.getEntity();

if(event.source.getSourceOfDamage() instanceof EntityPlayer && p.getHeldItem().getItem() instanceof ItemSword){

final int level = rand.nextInt(2) + 1;

DataHelper.setSwordLevel(p, DataHelper.getSwordLevel(p) + level);

}

}

Your EntityPlayers are not the same:

 

1. (EntityPlayer) event.source.getEntity()

2. (EntityPlayer) event.source.getSourceOfDamage()

 

You never check if the first one is really an EntityPlayer, yet you try to use it as one right away in your if statement.

I never casted the source, are you telling me too or..?

I never casted the source, are you telling me too or..?

I'm saying that you can't do this:

EntityPlayer p = (EntityPlayer) event.source.getEntity();
if (p.someMethod()) { 
// CRASH because event.source.getEntity() might not be a palyer

 

Welcome to the forums, btw - I've seen you around on MCF.

Also, you can't do this:

p.getHeldItem().getItem() // CRASH if player's held item is null

Than how would a good STABLE way to check if the player is the source of damage and he/she is holding a sword?

 

And ty, iv'e been told that people are much more helpful on these forums

Exactly the same way. DamageSource#getEntity() returns the direct source of the damage, which may be an arrow or even null (in the case of fire, for example); DamageSource#getSourceOfDamage() returns the ultimate source of the damage, so if an EntityPlayer shot an arrow, the first method returns the arrow, the second the player.

 

If you want to be sure that the source of the damage is a player, use the latter method only:

if (event.source.getSourceOfDamage() instanceof EntityPlayer) {
EntityPlayer p = (EntityPlayer) event.source.getSourceOfDamage();
if (p.getHeldItem() != null && p.getHeldItem.getItem() instanceof ItemSword) {
// do whatever
}
}

Thanks!! It works! And i also have a question about storing/getting ints server side using NBT, do you think you could help me over PM?

Sure, but would you mind using the MCF forums to PM me? I find the interface easier to use.

Sure