How Are Item Stats Calculated When It Is Identified?

The Item Database API returns only a single number for each stat of an item's identification.

The item guide returns the range of the stat (min-max).

I am wondering what calculation Wynncraft performs in-game to assign each stat its value when you identify an item.

Is it weighted in any way? Or completely "random"?

 

@motoki1

 

Completely random

 

I tried to have a look at the calculations performed by the Item Guide, but the JS is too scrambled.

https://pastebin.com/jdZufara

 

Max = (baseId)(1.3)
Min = (baseId)(.3)

Feel free to tag me if you have any further questions.

 

I know already that this is false, because the numbers returned by the API call are not perfectly in the middle of the calculated min/max stat values.

E.g. compare Kayde from its API call where the xpBonus is given as 10, but the Kayde as viewed in the Item Guide has an xpBonus range +3% to 13%.

The Item Guide takes the API call result and does some calculation to figure out the min and max, I just can't figure out what those calculations are.

More useful to me though are the calculations taken every time an item is identified, in the form

Code:

function get_stat(api_stat_result):
  return ...

so that get_stat(10) can return anything from 3 to 13.

Maybe the calculations are different for different stats, in which case I only really care about loot and xp at the moment, but knowing how all of them are found would be useful.

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@orange0401 wow thanks, that seems very likely.

How is it rounded though? Nearest? Floored? Ceilinged? (I've never seen non-integer stats.)

And also, just to check, how are the results distributed towards those two limits? Are they in any way weighted towards the "middle" or are they evenly distributed?

 

the result of the above calculations are rounded up, to the nearest integer.
it is a completely random roll between .30-1.30. 101 individual possibilities.

 

"are rounded up, to the nearest integer"

Sorry for being a pain in the butt, but please can you clarify what that means? It's kind of contradictory.

"it is a completely random roll between .30-1.30. 101 individual possibilities."

That's awesome! How do you know this? xD

So that means that, pretend I have an item with +10 xpBonus, the probability of it being a 13 is 1/11? (This depends on the meaning of "are rounded up, to the nearest integer")

Thank you so much for your help @orange0401

 

Let me explain the entire process
When an item is identified, every single base ID is rolled to a value of .30-1.30 (.3, .31, .32, .33, etc). Inclusive. This means that there are a total of 101 possible rolls on each identification.
This id value (lets say we get a .72) is then multiplied by the base id, which lets say is 10 intel.
(baseId)(roll)
(10)(.72) - 7.2
This number is then rounded to 8, meaning that we would get 8 intel on our item.

 

let me rephrase
you got the base id's
the base id's get multiplied by 0.3-1.3 at random
if its a negative id it gets multiplied by 1.3-0.7 at random
the end result is rounded up so you can get a max id without a max roll (hench max id's on items with only two **)

 

Ah, thank you for clarifying :)

Question: how are the negative values rounded? Towards or away from 0?

 

No idea

 

this shit makes my brain hurt ;-;

 

They are rounded the same way. Up, to the nearest integer.

 

So a roll of -5.9 would be "rounded" to -5? Just a ceiling function?