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How exactly % reduced armor pen works?

Posted: Sun Aug 23, 2020 7:04 pm
by Zxul
Who remembers how it works exactly? If for example I got 4 k armor and 10% reduced armor pen, does it translates to 400 armor? Or it depends on attacker's armor pen? Or how does it works?

Re: How exactly % reduced armor pen works?

Posted: Sun Aug 23, 2020 8:59 pm
by phononHYPE
I searched for "warhammer online combat formulas" and got viewtopic.php?t=971 this link. It's old and covers all parts of the combat formula, but I have high confidence it is still useful.

TLDR: if you have 4000 armor and enemy hitting you has 50% armor penetration, you apply your 10% reduced armor pen resulting in an attack on you that ignores 40% of your armor. You'll have to read more in that link for more info, but that's the basics.

Re: How exactly % reduced armor pen works?

Posted: Sun Aug 23, 2020 10:46 pm
by Omegus
phononHYPE wrote: Sun Aug 23, 2020 8:59 pmTLDR: if you have 4000 armor and enemy hitting you has 50% armor penetration, you apply your 10% reduced armor pen resulting in an attack on you that ignores 40% of your armor. You'll have to read more in that link for more info, but that's the basics.
Correct.

Just a reminder to anyone looking at armour formulas that "armour penetration" is its own unique thing and should not be additively combined with effects that ignore or by-pass armour.

Re: How exactly % reduced armor pen works?

Posted: Mon Aug 24, 2020 7:34 am
by nat3s
Omegus wrote: Sun Aug 23, 2020 10:46 pm
phononHYPE wrote: Sun Aug 23, 2020 8:59 pmTLDR: if you have 4000 armor and enemy hitting you has 50% armor penetration, you apply your 10% reduced armor pen resulting in an attack on you that ignores 40% of your armor. You'll have to read more in that link for more info, but that's the basics.
Correct.

Just a reminder to anyone looking at armour formulas that "armour penetration" is its own unique thing and should not be additively combined with effects that ignore or by-pass armour.

So for tactics that ignore 50% of enemy armour, how would an additional 20% armour pen from WS apply?

Re: How exactly % reduced armor pen works?

Posted: Mon Aug 24, 2020 7:43 am
by Sundowner
Ignore 50% armor, then pen % of remaining armor, I believe.

Re: How exactly % reduced armor pen works?

Posted: Mon Aug 24, 2020 11:53 am
by Omegus
Sundowner wrote: Mon Aug 24, 2020 7:43 am Ignore 50% armor, then pen % of remaining armor, I believe.
Pretty much.

Re: How exactly % reduced armor pen works?

Posted: Mon Aug 24, 2020 12:16 pm
by kallel
Idrinth wrote: Mon Sep 08, 2014 8:11 pm found the calculation-spreadsheet at least:
http://idrinth.de/wp-content/uploads/20 ... ompare.ods
Based on this it should work like this:

Code: Select all

armor = armor from gear - static debuffs + static buffs
armorEffective =  armor * (1 - (<armor penetration%> - <reduced armor pen%>))
So if you had 4000 armor, 10% reduced armor pen and the attacker had 0 WS and other armor penetration it would be 4400 effective armor.

Code: Select all

armorEffective =  4000 * (1 - (0 - 0.10)) = 4000 * (1 + 0.10) = 4000 * 1.10 = 4400
I'm not sure if the implementation on RoR is different though.