Spell resistance mechanics updated for WotLK

[Auntie Mangos]

The patch was written for revision 8806.

This patch fixes the following bugs:

1. Partial resists occur in multiples of 10% (not 25% like pre-WotLK).

2. At a given value of resistance, only 3-4 resist percentages are possible.

3. The long-term average damage resisted at a given value of resistance appears to follow the formula

Average Resist = Resistance/(Constant+ Resistance)

For level 80 mobs, the Constant is 400.

For level 83 bosses, the Constant appears to be 510 (pending final confirmation).

4. The possibility of a given partial resist % is eliminated when the average resistance (from the above formula) is 20% higher.

5. The probability of each partial resist seems to obey a triangular distribution.

Bug report thread:

http://getmangos.eu/community/viewtopic.php?id=10898

The patch was written by me.

More information about the formula is at:

http://elitistjerks.com/f15/t44675-resistance_mechanics_wotlk/

Link to the patch:

http://paste2.org/p/511213

Tested after applying the patch:

Casting shadow spells against a paladin with 130 Shadow Resist Aura:

Theoretically would result in:

10 percent resisted: 13.68%

20 percent resisted: 38.68%

30 percent resisted: 36.32%

40 percent resisted: 11.32%

Out of 239 spell hits I got:

10 percent resisted: 36 spells (15%)

20 percent resisted: 88 spells (37%)

30 percent resisted: 89 spells (37%)

40 percent resisted: 26 spells (11%)

[Raynar]

This patch works?

[DoiX]

didn't this patch stay too lung buried in this part of the forums?

I can confirm it works according to elitist jerks formulas

~bump~

[darkstalker]

nice patch, but i think it has some problems, first i think this is incorrect:

if (level == BOSS_LEVEL)
       {
           resistanceConstant = BOSS_RESISTANCE_CONSTANT;
       }

should use pVictim->isWorldBoss() instead

and this:

float victimResistance = baseVictimResistance + ignoredResistance;

shouldn't it substract instead? or maybe i understood wrong

and:

 uint32 level = getLevel();

it should be pVictim->getLevel() i guess

[Seegos]

Patch link "Page not found".

Any update of this patch or any other patch that solve this resistance problem?

[jluis859]

can someone update this?