Finicky conditions

**Quinn Inuit** · August 10, 2011, 09:10 PM

I've spent longer than I'd like to admit figuring this out, so I thought I'd put it out there for others to spare them such toils.

This script will work:

Code:

monitor_event SettlementTurnStart SettlementName Roma
    and GarrisonToPopulationRatio > 0.049
    things happen...
end_monitor

This script will not work:

Code:

monitor_event SettlementTurnStart SettlementName Roma
    if GarrisonToPopulationRatio > 0.049
    things happen...
    end_if
end_monitor

I can't explain why, but there you have it. I tried all kinds of permutations of the latter before realizing that I'd only seen the former phrasing functioning, and upon switching the code to the former phrasing it worked perfectly.

**HouseOfHam** · August 11, 2011, 10:46 AM

This condition requires an object exported by the event, so I suspect it depends on how many of these ifs you have in your monitor. If there is just one, I would probably work. If more than one, it won't.

**Squid** · August 11, 2011, 10:50 AM

As far as I'm aware if (and while) statements can only use conditions that have no requirements, GarrisonToPopulationRatio requires settlement to be exported and so cannot be used in either an if or a while statement.

**Quinn Inuit** · August 11, 2011, 07:09 PM

I'm curious, what does "export" mean, and why does that mess with "if" statements? I saw that a few nights ago in the BI_docs description of GarrisonToPopulationRati, but I don't know what it means.

**Muizer** · August 12, 2011, 05:21 AM

Events export variables. In the docudemon file the variables are listed after "exports". Conditions import variables. In the docudemon file these are listed after "trigger requirements"
When you code a trait trigger or script monitor, you must make sure that the conditions you want to use get the appropriate input variables from the event you're monitoring. If not, the condition won't work.

I've also come across the phenomenon that such event-condition combinations do not work in combination with if-end_if brackets. Sadly, you will have to programme a separate monitor for every alternative. (If not, I'd sure like to know about it too!).

There are conditions which do not rely in imported variables from events. In the docudemon file they are the ones that start with I_. As long as you use only this type of condition, you can use if-end_if brackets.

Anyway, that's my understanding.