Do something if item/items are struck by lightning

[elbaslito]

Hi,

 

So I am facing some trouble, whereby if item x is struck by lightning the item transforms into another. Basically the item is destroyed and the other item to be transformed into takes its place. I also want to do this with two items, say item a and item b are together and if they are struck by lightning (they are in the same position) they transform into another item. I have managed to do this with blocks, but only through the means of a rod, whereby on right click it summons lightning and through that code it checks if the block struck at the position is what I want it then it transforms it. But I want the block or item itself to check if it has been struck by lightning then transform. That way any lightning bolt from any source can transform it.

 

Thanks for your support

[TheMasterGabriel]

  On 8/27/2016 at 3:15 PM, elbaslito said:

Hi,

 

So I am facing some trouble, whereby if item x is struck by lightning the item transforms into another. Basically the item is destroyed and the other item to be transformed into takes its place. I also want to do this with two items, say item a and item b are together and if they are struck by lightning (they are in the same position) they transform into another item. I have managed to do this with blocks, but only through the means of a rod, whereby on right click it summons lightning and through that code it checks if the block struck at the position is what I want it then it transforms it. But I want the block or item itself to check if it has been struck by lightning then transform. That way any lightning bolt from any source can transform it.

 

Thanks for your support

 

I'm fairly sure there is a EntityStruckByLightningEvent that gets called whenever any entity is about to be hit by lightning. In an event handler, you can check if the entity is an EntityItem and holds the specific item(s) you want, cancel the event (if you want to prevent the items from being set on fire and despawning in the next few ticks), and then do whatever you whatever logic you want. (Checking item and transforming or checking if there are 2 items and transforming, etc)

[Choonster]

If one of the items is your own, create a class that extends

EntityItem

and overrides

Entity#onStruckByLightning

to attempt the transformation and then call the super method. Override

Item#hasCustomEntity

to return

true

and override

Item#createEntity

to create an instance of your custom

EntityItem

class at the same location as the

location

argument.

 

If none of the items are your own, subscribe to

EntityStruckByLightningEvent

and check if the entity is an

EntityItem

containing your item before attempting the transformation.

 

I explained how to do something similar (items transforming when near each other in the world) here, you can see my implementation here.

[elbaslito]

Alright, Thanks!!! I will try the subscribe to event thing, its a really good way to handle this (pun not intended). But what if I want it if the block is struck by lightning. The problem here is that there is no BlockStruckByLightning Event, only EntityStruckByLightning. So what do I do in this case?

[Choonster]

  On 9/14/2016 at 8:32 AM, elbaslito said:

Alright, Thanks!!! I will try the subscribe to event thing, its a really good way to handle this (pun not intended). But what if I want it if the block is struck by lightning. The problem here is that there is no BlockStruckByLightning Event, only EntityStruckByLightning. So what do I do in this case?

 

Either spawn an entity inside the block when it's placed or suggest that Forge add a

BlockStruckByLightningEvent

.

[jeffryfisher]

A lightning bolt is an entity. Would Forge's EntityJoinWorldEvent give you a chance to detect each bolt, look at its coords and do your actions? I haven't traced lightning's execution far enough to see if it is spawned on that path, but it may be worth a try (or further research).

[Losokos]

You could check for coordinates at which the lightning is struck instead...