count vs count_forumla

[Bizobinator]

I've been working on a mod that deals with adjusting research cost, and I've been looking at a few other mods to see how they did it. I came across both "count" and "count_formula"... Is there a documentation page that explains the difference?

[Choumiko]

https://wiki.factorio.com/Prototype/Technology#unit

[Hiladdar]

Count usually refers to a single number.

Count_formula refers tells the code to perform a numeric operation to determine the value.

In research of technology it is as follows:

count = 200,
or
count_formula = "2000*(L-7)-1000",

In the first example, the technology cost to advance that technology is 200, in the second case, Factorio takes the current level of the technology in question, and applies the formula.

Hiladdar

[Bizobinator]

Excellent! Thanks y'all! ^_^

[Bizobinator]

Hmm.... Is there a way to include another variable in the equation? I keep getting a nastigram that it's using a variable other than "L" or "l".

This is the error...

count formula error.PNG (23.03 KiB) Viewed 2287 times

And this is my code...

Code: Select all

if (settings.startup["all-sci-cost-mult"].value ~= nil) then
	
	bizobTechMult = settings.startup["all-sci-cost-mult"].value;
	
	for index,tech in pairs(data.raw.technology) do
		local unitTechCopy = table.deepcopy( tech.unit )
		local techMult = bizobTechMult
		
		if (unitTechCopy.count ~= nil) then
			unitTechCopy.count = math.max(math.floor(unitTechCopy.count * bizobTechMult));
		end
		
		if (unitTechCopy.count_formula ~= nil) then
			
			unitTechCopy.count_formula = "2^(L-6)*1000*techMult"
			
		end
		
		tech.unit = unitTechCopy
		
	end
end

[Choumiko]

you put the techMult variable in the string, depending on how you want it to apply it should be

Code: Select all

unitTechCopy.count_formula = "2^(L-6)*" .. 1000*techMult

or something along those lines