GameEvents.GetScenarioDiploModifier

[Lord Yanaek]

Has anyone investigated what this method does? It seems like it's used only in scenarios.
Am i right thinking this is a way to add custom diplomatic relations modifiers?
Here is an example from the Smoky Skies scenario.

-- Medium negative modifier when other player has exactly 2 Titles
GameEvents.GetScenarioDiploModifier1.Add(function(ePlayer1, ePlayer2)
	if (GetNumTokensOwned(ePlayer2) == 2) then
		return 20;
	end
	return 0;
end)

-- Large negative modifier when other player has more than 2 Titles (about to win)
GameEvents.GetScenarioDiploModifier2.Add(function(ePlayer1, ePlayer2)
	if (GetNumTokensOwned(ePlayer2) > 2) then
		return 70;
	end
	return 0;
end)

Searching for a match in the C++ code, i found 3 "instances" of this code in CvDiplomacyAI.cpp :

int CvDiplomacyAI::GetScenarioModifier1(PlayerTypes ePlayer)
{
	ICvEngineScriptSystem1* pkScriptSystem = gDLL->GetScriptSystem();
	if(pkScriptSystem)
	{
		CvLuaArgsHandle args;
		args->Push(m_pPlayer->GetID());
		args->Push(ePlayer);

		int iValue = 0;
		if (LuaSupport::CallAccumulator(pkScriptSystem, "GetScenarioDiploModifier1", args.get(), iValue))
		{
			return iValue;
		}
	}

	return 0;
}

If i understand and guess correctly, you can subscribe a Lua function to those 3 similar events, and the game will call them when checking diplomatic relations. Thus it is possible to actually modify diplomatic relations in Lua
Obviously, positive numbers give negative modifiers. Now, the question, does negative modifiers improve relations? I don't see anything that suggest negative numbers would be ignored in the C++ code, but i'm really bad at C++ and i guess more than i understand this code.

 

[Drawmeus]

Try it and see what happens! This is a really interesting find if it works.

 

[Gedemon]

yep, it works, just use negative value to raise relation.

 

[Craig_Sutter]

Check:

http://forums.civfanatics.com/showthread.php?t=470617

Post no. 6. It works.