[Pre-BB] MapleStory Formula Compilation

I have insignificant, but interesting information about rounding. As some of you may know, damage range rounding definitely happens before critical is added, as shown here.

 Spoiler

If the game had rounded the random number within my range to an integer after applying crit, then it could have hit odd numbers. However, the damage range was clearly rounded before crit, which results in nothing but even numbers after it was doubled.

See this screenshot of me using Powerstrike at level 8 (200%) and being able to get odd numbers.

 Spoiler

Why does it hit odd numbers? I expected it to round your range to an integer before adding any % mods, thus making any attack that does 200% damage only hit even numbers as well. As you can see, that did not happen.

See also this screenshot of a friend using a regular attack with max berserk. This should be 200% damage, no?

 Spoiler

Still hits odds. My first conclusion was that crit is added after all calculations and rounding is done. However, this cannot be true since crit is added before Berserk is.

 More Info

Where would the rounding go if the formula is as such? (example skill is Crusher at 170%)
(baseDamage-monsterDef)*((1.7+1.4)*2)
Would the floor() go with the blue or brown parentheses? In fact, there's no way you could round this to make it work with the rules that have already been discovered in the paragraphs above.

This is supplemented by some further testing I did. I made a pure dex bandit, got a point in double stab and got SE from a friend. My damage range ended up being 19-22, four numbers (19, 20, 21, 22). If rounding happens before SE, the only possible damage I could do is any of those four numbers +140% -- so I should have only 4 different possible crits on zero defense monsters. After some testing on blue and green snails (both have zero def), I found that I did 5 different crit numbers before SE ran out -- ranging from 47 to 53. I can upload the video if you want to see it for whatever reason.

This leads me to believe that SE is calculated in a different place than any innate critical a class may have. Or perhaps an entirely different formula is used for classes that have innate crit when they get SE.

For any class that doesn't have innate crit, rounding happens after all % mods (including SE). For classes with innate crit without SE, rounding happens before crit, but after the rest of the % mods. For classes with innate crit and SE, rounding happens after crit is applied. This was tested by being able to see odd numbers on Arrow Rain with SE (which is 400% damage).

Major thanks to Lachrymus for help and brainstorming~

By the way Fiel, is it possible for you to extract things like the heal formula from the client? Maybe you could crack this type of thing more easily than we can.