Game Mechanics: Player Armor Class (Long)

[Dolalin]

No joy, the thread wasn't crawled by Wayback, because the magelo forums required you to log in to view threads. The "On Determining AC" thread just goes to a 302 to login.jspa:

http://web.archive.org/web/2011*/htt....jspa?topic=19

[Dolalin]

Oh snap! I think the contents of the thread, or at least one of its posts, were crossposted to The Steel Warrior's forums. It has an Agility table, it might be the one people have been asking about:

https://web.archive.org/web/20041214...php/t-379.html

What does Agi do for AC? Here you go.
Origianlly posted by Sylphan to various places.

Re: On determining AC
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Ok I finished the agility table.
Here's the full formula for AC:

Avoidance = (T from table) + trunc(Defense * 16/9), but never less than 0
Caster Mitigation = trunc(Buffs/3) + trunc(Defense/2) + (Equipment + 1)
Anyone else's Mitigation = trunc(Buffs/4) + trunc(Defense/3) + trunc(Equipment * 4/3)
Displayed AC = trunc( (Avoidance + Mitigation) * 1000 / 847 )

Caster means Enchanter, Magician, Necromancer, Wizard.
Defense is the character's Defense skill.
Equipment is just the sum total of the raw AC from everything worn. Don't forget the range slot.
Buffs is the sum of the bonuses from all buffs. You'd have to check your spdat file to see those numbers, but for reference Skin Like Wood adds 15 and Skin Like Nature adds 55.
T comes from the agility table below, use the column corresponding to the character's level.
trunc means truncate, to remove the fraction; keep only the integer part of the value.

Some qualifications: Iksars get a bonus, I'm not sure how much but I suspect it might be adding (Level - 1) to Mitigation. The formula hasn't actually been tested on Beastlords or Vah Shir yet. The formula doesn't work for monks because of the weight limit thing, but it should work if they keep their weight under the limit. There is a 'never less than 0' issue with Mitigation too, but it only matters if you get hit with an AC debuff while wearing little or no equipment... it won't affect most people. The formula doesn't work right if your character has been drinking but it works in every other situation, including illusions, hunger, thirst, drowning, encumbered, low health, low stamina, stacked buffs and debuffs, and resurrection sickness. I have no proof that these are the actual Avoidance and Mitigation values, there isn't even any proof that Avoidance and Mitigation are ever used seperately in actual combat calculations... I just know that the first few factors are rounded up to 0 and are the same for all classes, so it seemed like a sensible division.


The table for T:

Level ..... -- 40+:20-39:7-19:1-6
---------------------------------
Agi 1...... ---24 :-24 :-24 :-24
Agi 2-3.... ---23 :-23 :-23 :-23
Agi 4...... ---22 :-22 :-22 :-22
Agi 5-6.... ---21 :-21 :-21 :-21
Agi 7-8.... ---20 :-20 :-20 :-20
Agi 9...... ---19 :-19 :-19 :-19
Agi 10-11.. ---18 :-18 :-18 :-18
Agi 12..... ---17 :-17 :-17 :-17
Agi 13-14.. ---16 :-16 :-16 :-16
Agi 15-16.. ---15 :-15 :-15 :-15
Agi 17..... ---14 :-14 :-14 :-14
Agi 18-19.. ---13 :-13 :-13 :-13
Agi 20..... ---12 :-12 :-12 :-12
Agi 21-22.. ---11 :-11 :-11 :-11
Agi 23-24.. ---10 :-10 :-10 :-10
Agi 25..... -- -9 : -9 : -9 : -9
Agi 26-27.. -- -8 : -8 : -8 : -8
Agi 28..... -- -7 : -7 : -7 : -7
Agi 29-30.. -- -6 : -6 : -6 : -6
Agi 31-32.. -- -5 : -5 : -5 : -5
Agi 33..... -- -4 : -4 : -4 : -4
Agi 34-35.. -- -3 : -3 : -3 : -3
Agi 36..... -- -2 : -2 : -2 : -2
Agi 37-38.. -- -1 : -1 : -1 : -1
Agi 39-65.. -- 00 : 00 : 00 : 00
Agi 66-70.. -- 01 : 01 : 01 : 01
Agi 71-74.. -- 05 : 05 : 05 : 05
Agi 75..... -- 39 : 33 : 23 : 09
Agi 76-79.. -- 40 : 33 : 23 : 10
Agi 80..... -- 41 : 34 : 24 : 11
Agi 81-85.. -- 42 : 35 : 25 : 12
Agi 86-90.. -- 42 : 36 : 26 : 12
Agi 91-95.. -- 43 : 36 : 26 : 13
Agi 96-99.. -- 44 : 37 : 27 : 14
Agi 100.... -- 45 : 38 : 28 : 15
Agi 101-105 -- 45 : 39 : 29 : 15
Agi 106-110 -- 46 : 39 : 29 : 16
Agi 111-115 -- 47 : 40 : 30 : 17
Agi 116-119 -- 47 : 41 : 31 : 17
Agi 120.... -- 48 : 42 : 32 : 18
Agi 121-125 -- 49 : 42 : 32 : 19
Agi 126-130 -- 50 : 43 : 33 : 20
Agi 131-135 -- 50 : 44 : 34 : 20
Agi 136-139 -- 51 : 44 : 34 : 21
Agi 140.... -- 52 : 45 : 35 : 22
Agi 141-145 -- 53 : 46 : 36 : 23
Agi 146-150 -- 53 : 47 : 37 : 23
Agi 151-155 -- 54 : 47 : 37 : 24
Agi 156-159 -- 55 : 48 : 38 : 25
Agi 160.... -- 56 : 49 : 39 : 26
Agi 161-165 -- 56 : 50 : 40 : 26
Agi 166-170 -- 57 : 50 : 40 : 27
Agi 171-175 -- 58 : 51 : 41 : 28
Agi 176-179 -- 58 : 52 : 42 : 28
Agi 180.... -- 59 : 53 : 43 : 29
Agi 181-185 -- 60 : 53 : 43 : 30
Agi 186-190 -- 61 : 54 : 44 : 31
Agi 191-195 -- 61 : 55 : 45 : 31
Agi 196-199 -- 62 : 55 : 45 : 32
Agi 200-219 -- 63 : 56 : 46 : 33
Agi 220-239 -- 64 : 57 : 47 : 34
Agi 240-255 -- 65 : 58 : 48 : 35

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[Croco]

That's exactly what I was hoping for! Dolalin to the rescue.