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Apolyton Civilization Forums : Powered by vBulletin version 2.0.3 Apolyton Civilization Forums > Call To Power II > CtP2-Source Code Project > trade route calculation?
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c2chanka is offline c2chanka
Settler

Jan 2005
time: 05:28
  Old Post 27-01-2005 13:15
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trade route calculation? Avatar Enlargement: We've got the solution

Hello, I've seen some Trade Route formulas posted under the CIV2 forum, I'm just wondering if anyone knows the trade route formula for CTP2. Or maybe a hint on which cpp file I should search under

J Bytheway is offline J Bytheway
Emperor
England
Jul 2001
time: 05:28
  Old Post 27-01-2005 19:37 Visit J Bytheway's homepage!
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Cursory investigation suggests that it's pretty simple. From TradeRouteData.cpp:

code:
sint32 TradeRouteData::GetValue() const
{
	if(m_sourceRouteType != ROUTE_TYPE_RESOURCE)
		return 0;

	
	double baseValue = g_theWorld->GetGoodValue(m_sourceResource);
	double distance = double(m_destinationCity->GetCityData()->GetDistanceToGood(m_sourceResource));
	return sint32(baseValue * distance);
}


That GetDistanceToGood is in terms of least movement cost to the good (I'm not sure if this gets recalculated as more roads, etc. are built).

I guess this may be processed further (taking into account city populations, or something like that). I suggest you investigate - I guess you'd either want to look for calls to the above function or else work the other way from wherever the values get used (e.g. the trade screen).
c2chanka is offline c2chanka
Settler

Jan 2005
time: 05:28
  Old Post 28-01-2005 03:00
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Wow, what a fast reply!!! Thank you very much for your help. I will look into that file =)
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