method i dont understand

[jamesscape2]

hey 

can u quickly explain how this method  works  it from the container.class

 

protected boolean mergeItemStack(ItemStack par1ItemStack, int par2, int par3, boolean par4)

 

i main problem is when i add this to my own class i dont get the numbers that are provided 

 

eg in the Furnace class it has this

 

if (!this.mergeItemStack(var5, 3, 39, true))

    {

    return null;

    }

 

what does the 3 and 39  mean/stand for

 

thanks

[drinfernoo]

No sure exactly, but I believe that method is for when you pick up a single/multiple item(s) from the stack, and it combines them. You know, so that if you have three picked up and you pick up another, it takes one away from the Slot and then you have five.

 

I think.

[jamesscape2]

k that make sense  i just dont get how it works in the Furnace Container,  coz im making my own custom furnace and i cant figure out how to

1) when u shift click a certain item it goes into a certain slot

2) Restrict slots to only accept certain items

 

 

any help on those would be good

[drinfernoo]

From what I understand, the shift-click thing is actually a different method (I can't remember what it's called), but I do know that in order to restrict what items can go into/come out of a Slot, you have to make your own Slot class that extends Slot, and then override some methods so it does what you want.