Giving xp to leader for every killed unit

[Anagkai]

The following code should give xp to my leader, whenever I kill a unit, that is with any of my units. It doesn't work though, there's probably a problem with the variables or the filters.

Code: Select all

	[event]
		name=die
		[filter]
			level=2,3
		[/filter]
		[filter_second]
			side=1
		[/filter_second]
		[modify_unit]
			[filter]
				id=Henry
			[/filter]
			{VARIABLE_OP ($this_unit.experience) add ($unit.level)}
		[/modify_unit]
	[/event]

Any tips are appreciated.

[Shiki]

You change at the end a variable, but… that variable is never going to have any effect, and also only exists inside the modify_unit tag, and will be cleared afterwards.
You could add a line like experience=$this_unit.experience afterwards to use it.

You can also use the Wesnoth Formula Language: experience=$($this_unit.experience+$unit.level)

In other places where one manipulates unit variables (e.g. $unit), one could use [unstore_unit] to change the actual unit afterwards.

[Ravana]

I doubt you can actually use actionWML inside modify_unit, which means VARIABLE_OP does nothing.

[beetlenaut]

You can use Wesnoth Formula Language, but I recommend doing it this way: store Henry, do the variable operation on stored_Henry.experience, then unstore Henry. It's very powerful technique that you should know. (Actually, this is exactly what [modify_unit] does, but that tag only handles simple cases.)