[FIXED] [Death Knight] Rune Regen from Haste

[Dreadblade]

WoW Freakz spell link: N/A
Bug description: Apparently it's calculated incorrectly.
Proof: According to this post the formula should look like this:
Rune Regen = Base Regen / [(1+ Haste_from_items / 100) * hastemodifier1 * hastemodifier2 and so on]
Base regen is 10. Haste from items is the haste displayed in your character sheet when you mouse over it. Haste modifiers are buffs such as Unholy Presence, Bloodlust or Unholy Frenzy.

So for example I have 7.10% haste from items, and a 20% modifier from Unholy Presence.
10 / [(1+ 7.1 / 100) * 1.2] = 10 / 1.2852 => 7.78s Rune Regen speed. instead I have 7.87

Retail proof:
http://i.imgur.com/caHh2aD.png

He has 7.33% haste and Unholy Presence. His rune speed is 7.76

10 / (1.0733 * 1.2) = 10 / 1.28796 => 7.7642... (only the first two digits are important)

Another example:
http://i.imgur.com/WT3bUYP.jpg

15.53% haste and no modifiers, 8.66 rune speed

10 / 1.1553 = 8.6557...

Video links

Spoiler:

https://youtube.com/watch?v=XQ4TDq7TbtI:


@9:00

https://youtube.com/watch?v=bCKn_T3rrCc:


@5:04 pause and use 0.25 speed to see it

[africa]

RuneRegen = 10 / 1.03564 = 9.6558



RuneRegen = 10 / 1.0702 = 9.34



RuneRegen = 10 / 1.242768 = 8.046



RuneRegen = 10 / 1.28424 = 7.7867

Apparently there is a modifier issue here. If you calculate Rune without any modifiers, it works ok.

[Dreadblade]

africa wrote:

Melee Attack Speed it uses the wrong multiplicative value, just like for Paladins

Is that so?

http://i.imgur.com/caHh2aD.png 41,41% haste and 3.6 weapon speed

http://www.wowhead.com/item=87176/shinka-execution-of-dominion

3.6 / 1.4141 = 2.5411

http://i.imgur.com/PupYta0.jpg 41,6% haste, 3.6 weapon speed

3.6 / 1.416 = 2.5423

Also you calculated this wrong, if you intended to find out melee speed without modifiers

africa wrote:

instead of 2 / 1.1356 = 1.76

It's 2 / 1.03564

[africa]

Edit:
Melee Attack Speed is not calculated correctly.
Haste rating should be additive, not multiplicative.




Unfortunately I didn't have many items to equip in order to make a better difference, but if I were to add haste gems and other items, there would be a difference.
The best example to show is that while I have 7.02% haste from gear, I have 17.86% haste.

(17.86/100+1) / 1.1 (base haste) = 1.07145 = 7.145 % haste, yet I have 7.02%. The only way to get 7.145% is from multiplication, not addition.

Haste rating stacks additively with itself (two sources of 100 haste rating give 200 haste rating stacked together) and then is converted into a percentage that stacks in a multiplicative manner with other sources of haste.

Edit2:

Also I think I found the reason for RuneRegen.

As Dreadblade stated, Rune Regen = Base Regen / [(1+ Haste_from_items / 100) * hastemodifier1 * hastemodifier2 and so on]

So assuming I have 3.56% haste from the head piece. After going UH presence, I should have 1.0356 * 1.2 = 1.2427.
So according to formula RR = 10 / 1.2427 = 8.04. But I have 8.09.
The game doesn't use this multiplication. It uses an addition, somewhat normalized. Instead of multiplying 1.2, it adds it, but adds the 0.2(20%), so we will have 1.2356.
Using the formula again RR = 10 / 1.2356 = 8.09, like shown.

Again, 7.02% from gear with UH presence = 1.284
RR = 10 / 1.284 = 7.788
But since it adds it, we'd have 1.2702
RR = 10 / 1.2702 = 7.872, like shown.

Again with Dreadblades' stats, 7.1%. Add UH presence = 1.2852
RR = 10 / 1.2852 = 7.78
But since it adds it, we'd have 1.271
RR = 10 / 1.271 = 7.867 = 7.87 (since WoW rounds it)


@dreadblade

[Dreadblade]

Indeed that's the problem with multipliers. Regarding haste from gear stacking incorrectly, there's already a different thread on it https://forum.wow-freakz.com/Multiple-Haste-Raiting-stacking-from-multiple-itemes-t413739.html

[africa]

Confirmed.

Rune Regen uses the correct % value for haste (is not affected by Haste bug), but when you add haste multipliers (UH presence, BL etc) it doesn't multiply it, it adds it.

Example:

10% haste from items
20% haste from UH
30% haste from BL

How it should be = 1.1*1.2*1.3=1.716(71.6% haste) ->>> RR=10/1.716=5.827
How it is = 1.1+1.2+1.3=1.6(60% haste) ->>> RR=10/1.6=6.2

then is converted into a percentage that stacks in a multiplicative manner with other sources of haste.

[Nexflame]

Fixed