Research:Magic
Spell Casting
Chance of successful Spell Cast
| Actions affected | On cast attempt |
| Description | |
| Implementation status | |
| Analysis status | Accurate, but requires more work; spell skill depends on dominant school for multi effect spells, but is unspecified; Sound spell effect is not accounted for |
chance = (Spells Skill * 2 + Willpower / 5 + Luck / 10 - SpellCost + CastPenalty) * (CurrentFatigue + MaximumFatigue * 1.5) / (MaximumFatigue * 2)
Cast cost
| Actions affected | On cast attempt |
| Description | |
| Implementation status | |
| Analysis status | Does not account for multiple effect spells, non-duration spells or fixed magnitude spells |
cost = 0.1 + ((min effect value / 20) + (max effect value / 20)) * ((duration - 1) / 2) + (range / 40).
x1.5 for ranged spell. Constant effect enchantments use fEnchantmentConstantDurationMult as their duration values (default 100).
- Touch/Self
cost = base cost * ((max + min) * duration * 0.025 + area * 0.0125)
- Target
cost = base cost * ((max + min) * duration * 0.3125 + area * 0.0125)
- Constant effect
cost = base cost * ((max + min) * 2.5 + area * 0.025)
The base cost are here
Magic Damage and Mitigation
| Actions affected | On magic hit |
| Description | |
| Implementation status | |
| Analysis status | Ignores willpower resists; which effects magic resistance apply to; reflection and absorption |
Spell Damage = Damage - Damage * ( Resistance - Weakness ) / 100
Item Charge
| Actions affected | On enchanted item use |
| Description | Charge consumed on use depends on skill. |
| Implementation status | |
| Analysis status | Verified; but a poorly scaling mechanic |
x = 0.01 * (110 - pcEnchant)
charge used = int(x * enchant base charge cost)
This makes items last 10 times longer at 100 enchant compared to 10 enchant, making it scale a little too well. MCP uses x = 0.025 * (400 - pcEnchant).
| Actions affected | On game tick |
| Description | Natural recharge. |
| Implementation status | |
| Analysis status | Verified |
Every item in the player's inventory charges by tickTime * fMagicItemRechargePerSecond. Items anywhere else do not charge.
| Actions affected | On soulgem use |
| Description | Recharging with a filled soulgem. Uses common term fatigueTerm. |
| Implementation status | |
| Analysis status | Verified |
luckTerm = 0.1 * luck
if luckTerm < 1 or luckTerm > 10: luckTerm = 1
intelligenceTerm = 0.2 * intelligence
if intelligenceTerm > 20: intelligenceTerm = 20
if intelligenceTerm < 1: intelligenceTerm = 1
x = (pcEnchant + intelligenceTerm + luckTerm) * fatigueTerm
roll 100, success if roll < x
on success restore charge: soulgem charge * (roll / x)
Comments
Recharging for most characters has a good chance of wasting a soul gem, as the enchant skill is the dominant term used for success. You would require enchant skill of over 65 with average stats to have a 100% success rate. The amount restored is a uniform random percentage of the soul gem, except if you have over a 100% success rate, in which case you will never get the full charge range out of a gem. The missing range increases as your skill does, but the lost charge is no more than 25% at the natural stat limit. Finally, note the strange luck term capping behaviour.