[1.20.1] Creating a custom blockentity from interaction with vanilla block

[jusipat]

Hi all, I have a pretty basic question here that I'll try to lay out as concisely as possible:

I am currently working on this: On right clicking a banner with a name tag, the banner will generate an invisible radius around it, and the player will be alerted everytime they cross in and out of this radius under a generic message "Leaving/entering name tag's territory". I have already created an event to handle the right clicking on a banner block with a name tag, my current issue is finding the best way to spawn a custom block entity (if this is the appropriate method to implement this) into the world which can act as the centre point for this radius (being the banner) from wherein I can implement all of the code logic.

I just need to be pointed in the right direction on how the best way to spawn this entity/blockentity. I have already tried to make a custom banner entity, or to override the vanilla banner block + entity, but I cannot see that as being the best way to go about this. If anyone has any suggestions on how to proceed, it would be greatly appreciated. Thanks.
 

[Microcellule]

In my mod, i tried to make a special block that "hurt" any living things that is around.
I used an entity block to do so. That entityBlock, every X tick, check if there is any living around.  If there is one, the block "hit" the entity.

You can make a ticking blockEntity linked to your banner that checks every "X" ticks if a player is around. If he detects someone as player,  you can "tag" him  like " he is in" and when he leaves , untag him (with a chat message each tagging/untagging for example). 

I think that's a good way to do it.

[jusipat]

Hi, thanks for the reply!

That seems like the best way to do it, my question is, how would you go about "linking"a block entity to a vanilla object in that way? I see for your example if you had a custom block you would have no issue in using your own CustomBlockBlockEntity associated with the custom block, however for me, banners already have a block entity, so unless I want to completely overwrite this vanilla BlockEntity, I am not sure on how to override or add methods to the BannerBlockEntity. Any suggestions?

Thanks again!

[Microcellule]

My not create your own BannerType Block  ?
Like that you can do whatever you want with it
And you can also take some code from the vanilla banner so make things work the same as a regular banner... except you had your custom things in addition .

 

[Wixter]

Hey can you send me pls the event interaction with the banner ?

and if possible can u tell me if i can do it with a custom Item and a custom block.