Interface Combat

Basic combat interface

Usage

local I = require('openmw.interfaces')

I.Combat.addOnHitHandler(function(attack)
   -- Adds fatigue loss when hit by draining fatigue when taking health damage
   if attack.damage.health and not attack.damage.fatigue then
       local strengthFactor = Actor.stats.attributes.strength(self).modified / 100 * 0.66
       local enduranceFactor = Actor.stats.attributes.endurance(self).modified / 100 * 0.34
       local factor = 1 - math.min(strengthFactor + enduranceFactor, 1)
       if factor > 0 then
           attack.damage.fatigue = attack.damage.health * factor
       end
   end
end)

Type `Combat`

Combat.ATTACK_SOURCE_TYPES	#AttackSourceType
Combat.ATTACK_TYPES	#AttackType
Combat.addOnHitHandler(handler)	Add new onHit handler for this actor If `handler(attack)` returns false, other handlers for the call will be skipped.
Combat.adjustDamageForArmor(Damage, actor)	Calculates the character's armor rating and adjusts damage accordingly.
Combat.adjustDamageForDifficulty(attack, defendant)	Calculates a difficulty multiplier based on the current difficulty settings and adjusts damage accordingly.
Combat.applyArmor(attack)	Applies this character's armor to the attack.
Combat.getArmorRating(actor)	Computes this character's armor rating.
Combat.getArmorSkill(item)	Computes this item's armor skill.
Combat.getEffectiveArmorRating(item, actor)	Computes the effective armor rating of a single piece of openmw.types#Armor, adjusted for skill and item condition
Combat.getSkillAdjustedArmorRating(item, actor)	Computes the armor rating of a single piece of openmw.types#Armor, adjusted for skill Note that this interface function is read by the engine to update the UI.
Combat.onHit(attackInfo)	Hit this actor.
Combat.pickRandomArmor(actor)	Picks a random armor slot and returns the item equipped in that slot.
Combat.spawnBloodEffect(position)	Spawns a random blood effect at the given position
Combat.version	Interface version

Type `AttackInfo`

AttackInfo.ammo	(Optional) Ammo record ID
AttackInfo.attacker	(Optional) Attacking actor
AttackInfo.damage	A table mapping a stat name (health, fatigue, or magicka) to a number. For example, {health = 50, fatigue = 10} will cause 50 damage to health and 10 to fatigue (before adjusting for armor and difficulty). This field is ignored for failed attacks.
AttackInfo.hitPos	(Optional) Where on the victim the attack is landing. Used to spawn blood effects. Blood effects are skipped if nil.
AttackInfo.sourceType	What class of attack this is.
AttackInfo.strength	A number between 0 and 1 representing the attack strength. This field is ignored for failed attacks.
AttackInfo.successful	Whether the attack was successful or not.
AttackInfo.type	(Optional) Attack variant if applicable. For melee attacks this represents chop vs thrust vs slash. For unarmed creatures this implies which of its 3 possible attacks were used. For other attacks this field can be ignored.
AttackInfo.weapon	(Optional) Attacking weapon

Type `AttackSourceType`

AttackSourceType.Magic
AttackSourceType.Melee
AttackSourceType.Ranged
AttackSourceType.Unspecified

Type `AttackType`

AttackType.Chop
AttackType.Slash
AttackType.Thrust

Type `Combat`

Field(s)

#AttackSourceType Combat.ATTACK_SOURCE_TYPES: #AttackSourceType

#AttackType Combat.ATTACK_TYPES: #AttackType

Combat.addOnHitHandler(handler)

Add new onHit handler for this actor If handler(attack) returns false, other handlers for the call will be skipped.

Where attack is the same #AttackInfo passed to #Combat.onHit

Parameter

#function handler : The handler.

Combat.adjustDamageForArmor(Damage, actor)

Calculates the character's armor rating and adjusts damage accordingly.

Note that this function only adjusts the number, use #Combat.applyArmor to include other side effects.

Parameters

#number Damage : The numeric damage to adjust
openmw.core#GameObject actor : (Optional) The actor to calculate the armor rating for. Defaults to self.

Return value

#number: Damage adjusted for armor

Combat.adjustDamageForDifficulty(attack, defendant)

Calculates a difficulty multiplier based on the current difficulty settings and adjusts damage accordingly.

Has no effect if both this actor and the attacker are NPCs, or if both are Players.

Parameters

#Attack attack : The attack to adjust
openmw.core#GameObject defendant : (Optional) The defendant to make the difficulty adjustment for. Defaults to self.

Combat.applyArmor(attack)

Applies this character's armor to the attack.

Adjusts damage, reduces item condition accordingly, progresses armor skill, and plays the armor appropriate hit sound.

Parameter

#Attack attack :

Combat.getArmorRating(actor)

Computes this character's armor rating.

Note that this interface function is read by the engine to update the UI. This function can still be overridden same as any other interface, but must not call any functions or interfaces that modify anything.

Parameter

openmw.core#GameObject actor : (Optional) The actor to calculate the armor rating for. Defaults to self.

Return value

#number:

Combat.getArmorSkill(item)

Computes this item's armor skill.

You can override this to return any skill you wish (including non-armor skills, if you so wish). Note that this interface function is read by the engine to update the UI. This function can still be overridden same as any other interface, but must not call any functions or interfaces that modify anything.

Parameter

openmw.core#GameObject item : The item

Return value

#string: The armor skill identifier, or unarmored if the item was nil or not an instance of openmw.types#Armor. Can return nil if unimplemented.

Combat.getEffectiveArmorRating(item, actor)

Computes the effective armor rating of a single piece of openmw.types#Armor, adjusted for skill and item condition

Parameters

openmw.core#GameObject item : The item
openmw.core#GameObject actor : (Optional) The actor, defaults to self

Return value

#number:

Combat.getSkillAdjustedArmorRating(item, actor)

Computes the armor rating of a single piece of openmw.types#Armor, adjusted for skill Note that this interface function is read by the engine to update the UI.

This function can still be overridden same as any other interface, but must not call any functions or interfaces that modify anything.

Parameters

openmw.core#GameObject item : The item
openmw.core#GameObject actor : (Optional) The actor, defaults to self

Return value

#number:

Combat.onHit(attackInfo)

Hit this actor.

Normally called as Hit event from the attacking actor, with the same parameters.

Parameter

#AttackInfo attackInfo :

Combat.pickRandomArmor(actor)

Picks a random armor slot and returns the item equipped in that slot.

Used to pick which armor to damage / skill to increase when hit during combat.

Parameter

openmw.core#GameObject actor : (Optional) The actor to pick armor from, defaults to self

Return value

openmw.core#GameObject: The armor equipped in the chosen slot. nil if nothing was equipped in that slot.

Combat.spawnBloodEffect(position)

Spawns a random blood effect at the given position

Parameter

openmw.util#Vector3 position :

#number Combat.version: Interface version

Type `Attack`

Type `AttackInfo`

Field(s)

#string AttackInfo.ammo: (Optional) Ammo record ID

openmw.types#Actor AttackInfo.attacker: (Optional) Attacking actor

#table AttackInfo.damage: A table mapping a stat name (health, fatigue, or magicka) to a number. For example, {health = 50, fatigue = 10} will cause 50 damage to health and 10 to fatigue (before adjusting for armor and difficulty). This field is ignored for failed attacks.

openmw.util#Vector3 AttackInfo.hitPos: (Optional) Where on the victim the attack is landing. Used to spawn blood effects. Blood effects are skipped if nil.

#AttackSourceType AttackInfo.sourceType: What class of attack this is.

#number AttackInfo.strength: A number between 0 and 1 representing the attack strength. This field is ignored for failed attacks.

#boolean AttackInfo.successful: Whether the attack was successful or not.

#AttackType AttackInfo.type: (Optional) Attack variant if applicable. For melee attacks this represents chop vs thrust vs slash. For unarmed creatures this implies which of its 3 possible attacks were used. For other attacks this field can be ignored.

openmw.types#Weapon AttackInfo.weapon: (Optional) Attacking weapon

Type `AttackSourceType`

Table of possible attack source types

Field(s)

#string AttackSourceType.Magic

#string AttackSourceType.Melee

#string AttackSourceType.Ranged

#string AttackSourceType.Unspecified

Type `AttackType`

Table of possible attack types

Field(s)

#number AttackType.Chop

#number AttackType.Slash

#number AttackType.Thrust

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