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[Rynas]

GhoXen's excellent thread hasn't been updated in a while.  A lot of the information is still correct, but some of it is outdated, either due to patching, more complete testing, or better data available.

 

The fine folks at DAITools have produced an LUA script explorer that allows us to look at script source code.  One of the major scripts is apparently responsible for computing combat damage.  The info below is taken from that script (and related ones).  There are still some unknowns, but there's a lot of helpful stuff here.

 

The formulas below are incomplete, but I've tried to capture the most important elements.

 

PLAYER DAMAGE CALCULATION

Spoiler

TotalDamage = (baseDamage - effectiveArmor) * (1 + abilityBonus) * (1 + damageMultiplier + typeBonus + attackBonus) * (1 + criticalBonus + flankingBonus) * (1 - Resistance)

 

Minimum damage is 1.  There is a random component that causes damage to range from 95% - 105% of the computed totals.

 

The script aborts and returns 0 if the target is "resistant" to the damage type (physical or magical).

 

baseDamage is:

- Right-hand damage for traps (Artificer)

- Overridden by certain abilities (grenades?)

 

effectiveArmor = (armorRating - armorPenetration) * (1 - armorPenetrationPercent)

 

criticalBonus and flankingBonus are only applied when appropriate.

 

flankingBonus:

- Applies when the player is in the "rear 180-degree cone" of the target

- Receives a 25% penalty if outside melee range (3 meters)

 

Physical damage is multiplied by 2.5 if friendly fire is on and the target is a player.

 

If the target is "shielded" (not sure what that means) and player is attacking from the front, damage is halved.

 

CREATURE vs. PLAYER DAMAGE CALCULATION

Spoiler

TotalDamage = (baseDamage - effectiveArmor) * (1 + abilityBonus + damageMultiplier + typeBonus + attackBonus + criticalBonus + flankingBonus + difficultyBonus + rankBonus + levelBonus) * (1 - Resistance) * (1 - Defense)

 

effectiveArmor = (armorRating - armorPenetration) * (1 - armorPenetrationPercent)

 

difficultyBonus is determined by game difficulty.  Exact values are unknown at the moment (testers?).

 

rankBonus depends on creature "rank:"

- Rank 0: 0%

- Rank 1: 12.5%

- Rank 2: 25%

 

levelBonus is 25% per level beyond player level + 3.

 

Defense is:

- Melee if damage type is physical and you are within 3 meters of the attacker (regardless of weapon)

- Ranged if damage type is physical and you are more than 3 meters from the attacker

- Magic otherwise

 

Front Defense is added to Defense if being attacked from the front.

 

If the target is "shielded" and player is attacking from the front, damage is halved.

 

Please post corrections/questions/additions below.  (If you're posting a correction or addition, please make sure you have independently verifiable evidence, such as a code snippet or screenshots/video!)

 

[Edit: Formatting, clarity]

[mesmerizedish]

Do you have any idea if it's possible to edit, recompile, and replace LUA scripts in game?

[Rynas]

You can export, edit, and recompile the scripts, but I don't think they've figured out how to re-import them yet.  I believe they're working on it, though.

[Kaylon]

Does that mean that spells are also affected by armor?

[PapaCharlie9]

 

 

PLAYER DAMAGE CALCULATION

Spoiler

TotalDamage = (baseDamage - effectiveArmor) * (1 + abilityBonus) * (1 + damageMultiplier + typeBonus + attackBonus) * (1 + criticalBonus + flankingBonus) * (1 - Resistance)

 

Minimum damage is 1.  There is a random component that causes damage to range from 95% - 105% of the computed totals.

 

The script aborts and returns 0 if the target is "resistant" to the damage type (physical or magical).

 

baseDamage is:

- Right-hand damage for traps (Artificer)

- Overridden by certain abilities (grenades?)

 

effectiveArmor = (armorRating - armorPenetration) * (1 - armorPenetrationPercent)

 

criticalBonus and flankingBonus are only applied when appropriate.

 

flankingBonus:

- Applies when the player is in the "rear 180-degree cone" of the target

- Receives a 25% penalty if outside melee range (3 meters)

 

Physical damage is multiplied by 2.5 if friendly fire is on and the target is a player.

 

If the target is "shielded" (not sure what that means) and player is attacking from the front, damage is halved.

 

 

 

"Shielded" must mean an enemy knight using a shield.

 

Question about the formula:

Spoiler

What are damageMultiplier and typeBonus?

 

One or the other must have to do with elemental vulnerability, like how the Fereldan Frostback dragon is vulnerable to cold attacks. But what does the other represent? Maybe status effects, like Horn of Valor or Rally?

 

So I'm guessing damageMultiplier is for status effects and typeBonus is for vulnerable to a specific type of attack.

[Cyberpunk]

Thanks a lot for this! Would it be possible to make an excel dmg calculator? Only if you have the time!