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Accueil » news » forums » Support & Feedback » Scenarios & Mods » SE:V MODs

Geometric Progression

Soumis par Nevyn le Jeu, 2007-04-26 09:22 SE:V MODs

1 + 1/2 + 1/3 + 1/4....
Thats what some people have been after I believe when they have been talking about diminishing returns for upgrading facilities.
I'm just brain dead at 2am in the morning and I can't remember how to model this algabreically atm, so if someone has the formula for modeling a geometric progression we can be away with diminishing returns for upgrading them thar research centers.

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Re: Geometric Progression

Soumis par Nevyn le Jeu, 2007-04-26 10:31

*coughs and whimpers* Wouldn't you know it
That particular progression model works out best using a natural log formula

0.5+LN((2n+1)/2) to be exact
Which isn't quite a perfect model of that geometric progression but is damn close.

Now since I'm on my laptop I'm just not sure if you can use a Natural log function inside the Facilities file

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Re: Geometric Progression

Soumis par Gideon le Jeu, 2007-04-26 11:36

Nevyn wrote:
*coughs and whimpers* Wouldn't you know it That particular progression model works out best using a natural log formula

0.5+LN((2n+1)/2) to be exact
Which isn't quite a perfect model of that geometric progression but is damn close.

Now since I'm on my laptop I'm just not sure if you can use a Natural log function inside the Facilities file

0.5+Ln(((2*[%Level%])+1)/2) should do it, assuming you are basing it off of facility level.

From SE5_Modding.pdf:

Ln
(Val1: real): real

The Ln function returns the natural logarithm (Ln(e) = 1) of the real-type expression Val1.

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Re: Geometric Progression

Soumis par Nevyn le Jeu, 2007-04-26 22:12

Gideon wrote:
Nevyn wrote:
*coughs and whimpers* Wouldn't you know it That particular progression model works out best using a natural log formula

0.5+LN((2n+1)/2) to be exact
Which isn't quite a perfect model of that geometric progression but is damn close.

Now since I'm on my laptop I'm just not sure if you can use a Natural log function inside the Facilities file

0.5+Ln(((2*[%Level%])+1)/2) should do it, assuming you are basing it off of facility level.

From SE5_Modding.pdf:

Ln
(Val1: real): real

The Ln function returns the natural logarithm (Ln(e) = 1) of the real-type expression Val1.

Whoot! I just didn't have time to check the pdf last night when I posted it.
So all you people wanting a diminishing returns curve, there you have it. Now no longer can you simply pile 50 levels into Applied research and be miles ahead of the computer who has only spent 10, instead your only a fraction faster.

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Re: Geometric Progression

Soumis par Gideon le Ven, 2007-04-27 15:18

By the way, this is a great idea. Mind if I implement such a curve in my mod? Don't want to go around idea-stealing, but I've always liked the idea of diminishing returns...

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Re: Geometric Progression

Soumis par Fyron le Ven, 2007-04-27 15:53

It's not clear to me how using basic mathematical constructs could be an issue with "idea-stealing."


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Re: Geometric Progression

Soumis par MRing le Ven, 2007-04-27 18:42

Considering one of the earliest (modern) economists to put the concept of diminishing marginal returns to paper died in 1781 I don't think you'll be stepping on too many toes. Eye-wink It's a pillar of economic theory so if nothing else it sounds more realistic.

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Re: Geometric Progression

Soumis par Nevyn le Ven, 2007-04-27 23:03

Go ahead and use my maths, that was why I posted it, so that people can use in mods.
It works best over a range of 1-20 levels, otherwise the top levels start getting virtually negligible returns.

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