[SOLVED] Hook for custom dispenser behaviour?

[Aggurai]

Hello, I have a custom entity that spawns from an item, and I would like to make it so that when the item is placed in a dispenser, it shoots out the entity, like an egg or snowball.

 

I have googled this already, but only found a few other people needing to do this, but on one of them someone said to the person that there was a way to do this, but didn't tell him how.

 

I assume there probably is a way because it is implemented in modloader, and i don't want to have to overwrite DispenserBehaviours.java D:

 

Any help gladly appreciated i'm sure its probable simple

[LexManos]

You don't have to edit any base classes.

Just do the same thing that DispenseBehaviors is doing in your code. REGISTER your handler...

You can do that from anywhere in your code without having to have it in a base class...

[Aggurai]

Thanks! I have now registered my Dispenser behavior, however I am using an item with metadata and need to get the damage value of the item that is going to be shot, so that I can change the entity that spawns.

 

The easy way of normally doing this without metadata would to use the code DispenserBehaviorEgg.java uses

final class DispenserBehaviorEgg extends BehaviorProjectileDispense
{
    /**
     * Return the projectile entity spawned by this dispense behavior.
     */
    protected IProjectile getProjectileEntity(World par1World, IPosition par2IPosition)
    {
        return new EntityEgg(par1World, par2IPosition.getX(), par2IPosition.getY(), par2IPosition.getZ());
    }
}

But there is no itemstack argument I can use to find the damage value.

Then I looked in the behavior for BehaviorDefaultDispenseItem, used by fireworks, mob eggs, etc so similar to what I am doing, and it has a method called

public ItemStack dispenseStack(IBlockSource par1IBlockSource, ItemStack par2ItemStack)

I have tried modifying my Dispenser Behaviour to use this, and have managed to get it to shoot my custom item out, howver it does not spawn the entity that it normally does when it hits the ground (when you throw it yourself) . I know it must have got to this part of code, because it is in the same place that the particles are told to appear, and they show up fine...

 

If anyone could shed some light on this, I'd be very happy!

[Aggurai]

Got it working now, managed to replicate the functionality of the egg's function in the one that passes on the itemstack. Now to just do a switch statement for the damage values

[Draco18s]

Yeah, dispenser behaviors are very easy to make.  I actually made my own version of the dispenser recently (fires twice per trigger*) and has some special effects (like for fire I have it create a line of fire four wide in front of it, rather than only the first block).  I had to copy most of the net.minecraft.dispenser package to do it, but once I had that and had things registered, it was really easy to create custom behaviors.

 

*Was originally four, but seeing as there's a damage-delay only one would effect the player, so I had it trigger only twice, but do twice as much damage.  Kept it at two so that it would cause arrow clusters to pepper the walls.

[ninjapancakes87]

Yeah, dispenser behaviors are very easy to make.  I actually made my own version of the dispenser recently (fires twice per trigger*) and has some special effects (like for fire I have it create a line of fire four wide in front of it, rather than only the first block).  I had to copy most of the net.minecraft.dispenser package to do it, but once I had that and had things registered, it was really easy to create custom behaviors.

 

*Was originally four, but seeing as there's a damage-delay only one would effect the player, so I had it trigger only twice, but do twice as much damage.  Kept it at two so that it would cause arrow clusters to pepper the walls.

 

How did you register your dispenser behavior?  I see a putObject method in RegistrySimple, but I don't know what the second object is for.

 

Apologies for commenting on the solved thread, I'm just curious as to how you did it.