DeVoid.java

public class DeVoid {
	@AutoSubscribe
	public static DeVoid INSTANCE = new DeVoid();
	
	@SubscribeEvent
	public void worldLoad(WorldEvent.Load event) {
		if (!event.world.getGameRules().hasRule("doesVoidKillPlayer")) {
			event.world.getGameRules().addGameRule("doesVoidKillPlayer", "true", ValueType.BOOLEAN_VALUE);
			TiggCore.LOGGER.info("Added doesVoidKillPlayer gamerule to " + event.world.getSaveHandler().getWorldDirectoryName() + "\\" + event.world.provider.getDimensionName());
		}
	}
	
	@SubscribeEvent
	public void undoDamage(LivingAttackEvent event) {
		if (event.entity.worldObj.getGameRules().getGameRuleBooleanValue("doesVoidKillPlayer"))
			return;
		if (event.source == DamageSource.outOfWorld) {
			if (event.entityLiving instanceof EntityPlayer)
				event.setCanceled(true);
		}
	}
}