Hi everyone

 

I want ro create my own custom event that gets triggered by a custom action in game. I know it is possible to do this by extending the Event class. But i have zero experience in doing this i was

wondering what are the key things to keep in mind when trying this. Do i need to register the class some how? Any specifics i need to remember to do? Anyone know of any tutorials that would explain the concepts needed? I understand how to use the existong events and how to register them to the correct bus but what is required for creating a custom event that is fired at a custom time/custom on game action?

Just make your own Event class, and post instance of the event when it is needed.

Here's an example from my project

SpecialBlockEvent ev = new SpecialBlockEvent.BlockUpdateEvent(world, x, y, z, world.getBlockMetadata(x, y, z), world.getBlock(x, y, z), world.getBiomeGenForCoords(x, z));
MinecraftForge.EVENT_BUS.post(ev)

As mentioned above, creating a custom even and posting it to a bus is pretty easy.  I would also suggest you look at how the built-in events work and are used.  For example, usually the vent takes in other parameters that are useful in the event handling.  Also, you may not need cancellation for your event but if you do there are sort of two approaches for "cancellation" of an event which you may want to consider -- there is the boolean return value which can be used to interrupt your code in the case the event is cancelled, and there is the event results which can be things like DENY.  Anyway, look at built-in events to get a sense of how this is implemented and used.

 

Lastly, it goes without saying that you still have to handle the event normally.  So you need an event handler class registered to the bus, and that class needs to have a method that subscribes and has the event parameter of your event.