Basically, what i want is if i have a certain item in my inventory, all entities in a certain range to be damaged wherever i go. But how would i go about getting what i want? I have tried adding potion effects, but that didnt seem to work.

 

 

Use the PlayerTick event.

Use the PlayerTick event.

 

Thats what i thought, but how would i do this?

Create an event handler for PlayerTickEvent.  I have a tutorial on event handling here: http://jabelarminecraft.blogspot.com/p/minecraft-forge-172-event-handling.html

 

In that event handling method, check if the player is holding the item you're interested in.  If it is, use the worldObj.getEntitiesWithinAABB() method to get a list of the entities within a certain bounding box you choose.  Iterate through that list and take each entity and damage them.

If it is your Item and not a vanilla Item you can just use the onUpdate method in your Item class, no need for an event handler.

 

Really? Ok thanks a lot!