This trigger is ideal for modifying Actor characteristics. Basic modifications to characteristics can be done via Active Effect changes, however, this is limited to only modifying the characteristic’s total value (via modifier or initial), but if more nuanced modifications are needed, this is the trigger for doing so.

Key

computeCharacteristics

Arguments

args.actor - Actor whose characteristics are being computed

Examples

Add +1 Strength Bonus

Usage: Adds +1 to a Strength’s “Bonus” value, without changing the characteristic itself.

this.actor.system.characteristics.s.bonus += 1
this.actor.system.characteristics.s.calculationBonusModifier -= 1

Notes: Can also use args.actor. See Effects for what calculationBonusModifier is.

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Set a Characteristic’s total value

Usage: Sets Initiative to 10 and its bonus to 1, regardless of other modifiers.

this.actor.characteristics.i.value = Math.min(this.actor.characteristics.i.value, 10);
this.actor.characteristics.i.bonus = 1;

for(let skill of this.actor.itemTypes.skill.filter(i => i.system.characteristic.value == "i"))
{
    skill.system.total.value= Math.min(skill.system.total.value, 10) + skill.system.advances.value
}

Notes: When this trigger runs, all skill totals have been computed, so we need to go through each skill and set its total to 10 + the skill’s advances