I want to change the actual hitbox of the entity when a certain conditions is fullfiled. I've tried with "setBoundingBox" and "getDimensions" with no results.
In my Entity:

public void ChangeHitbox(){
    if(condition){
    this.setBoundingBox(AABB.ofSize(new Vec3(0,0,0),1D,1D,2D));
    }
}

I'm pretty sure that this is managed when I register the entity, but maybe there's a method to do this? I've already managed to change the model size, but not the actual hitbox.

If you look at Entity.setPos() you can see the bounding box gets recalculated whenever the entity's position changes.

It's in world co-ords, not relative co-ords.

 

The actual bounding box is calcluated using this.dimensions, it does not call getDimensions(Pose) here.

 

this.dimensions is recalculated from getDimensions() but only if you call Entity.refreshDimensions() where it also recalculates a number of other things.

Thanks a lot for answering. I'm gonna try using setPos(), also I could found the shulker as example.