Author 
Topic 
BeastlyRage 24th Imperial Crusade

Posted  2011.03.25 06:38:00  [ 1]
Edited by: BeastlyRage on 25/03/2011 06:44:27I got this problem with EFT, its showing different EHP values from my own calculations. OBSERVE: observationThat is with 100% explosive damage. My mathz: 4563(Shield HP) * 1.727(Shield EXP Resist) + 3063(Armour HP) * 1.235(Armour EXP Resist) + 2076(Hull HP) * 1.6(DCII gives 60% Hull resists across the board) = 14,984.706 EHP EFT EHP: 25,880 Only a 10k difference... Either I fail somewhere really hard or my most important tool in life just failed me. 
Isthisanalt 
Posted  2011.03.25 06:48:00  [ 2]
You should be dividing by the remaining percentage. so say resists are 72.7% you should be dividing by 0.273 getting 16714 just for your effective shield HP. 
Xercodo Amarr Xovoni Directorate 
Posted  2011.03.25 06:50:00  [ 3]
Edited by: Xercodo on 25/03/2011 06:49:56 100  72.7 = 27.3% of actual dmg getting thru cause it resists the other 72.7%
27.3 = 4563 100 = x
456,300 = 27.3x
x = 16,714.29 EHP on shields your math = 7,880.30 EHP on shields
see the diff? 
BeastlyRage 24th Imperial Crusade

Posted  2011.03.25 06:51:00  [ 4]
Originally by: Isthisanalt You should be dividing by the remaining percentage. so say resists are 72.7% you should be dividing by 0.273 getting 16714 just for your effective shield HP.
I don't get it. Why would you divide? 
BeastlyRage 24th Imperial Crusade

Posted  2011.03.25 06:54:00  [ 5]
ok. you guys are right but I don't understand why you divide. By providing 70% resist doesn't that just increase the amount of damage your able to absorb by 70%? 
Isthisanalt 
Posted  2011.03.25 06:57:00  [ 6]
no, it means you are letting only 30% damage you. use an easy number for an example like 75% resists. meaning only 25% of the damage is hurting. Which means you need to do 4 times as much damage to effectively do the same as 0 resists. 4 times is the same as dividing by 0.25 
Xercodo Amarr Xovoni Directorate 
Posted  2011.03.25 07:00:00  [ 7]
Originally by: BeastlyRage ok. you guys are right but I don't understand why you divide. By providing 70% resist doesn't that just increase the amount of damage your able to absorb by 70%?
it means 70% is negated and 30% is actually inflicted 
BeastlyRage 24th Imperial Crusade

Posted  2011.03.25 07:01:00  [ 8]
Originally by: Isthisanalt no, it means you are letting only 30% damage you. use an easy number for an example like 75% resists. meaning only 25% of the damage is hurting. Which means you need to do 4 times as much damage to effectively do the same as 0 resists. 4 times is the same as dividing by 0.25
oh I get it now. ty 
Isthisanalt 
Posted  2011.03.25 07:02:00  [ 9]
Lovely. And my wife tells me i can;t explain for ****. 
Mara Rinn 
Posted  2011.03.25 07:12:00  [ 10]
Why divide?
As stated, the 72.7% resist is reducing the incoming damage to 27.3% of its original value.
So to calculate the effective hit points of your shields, you want to find out how much incoming damage your shields can absorb, assuming the damage all arrives at once (i.e.: no regen, no boost cycles).
Since your shields are worth 4563HP, and you want to find the amount of damage that will have to be applied before the 72.7% resist in order to equal your shield HP, you have to account for that resisted damage. This is done by subtracting the resisted damage from the applied damage, to find the effective damage dealt to the shields.
We find the effective damage by multiplying the (unknown quantity of) damage by 72.7%, subtracting this from the (unknown quantity of) damage, and solving this singlevariable equation to find the unknown quanity required to make the modified value equal to the shield hit points.
The equation is simply:
S = D  (D x R)
Where S is shield HP, D is total damage and R is the resistance of your shields to that type of damage. Since R is a resistance measured between 0.0 and 1.0 (it's a percentage expressed as a decimal), the effective damage dealt to your shields is calculated by subtracting the resisted damage from the total damage (to find the damage actually removed from S).
This can be simplified to:
S = D x (1  R)
Which in this example is:
S = D x 0.273
We want to get D by itself on one side of the equality, so divide both sides by the damage modifier 0.273:
S / 0.273 = D x 0.273 / 0.273
But the 0.273 divided by itself equals 1 (or "cancels out"), giving
S / 0.273 = D S / (1  R) = D
But the left and right side of an equality can be swapped, giving
D = S/0.273 D = S/(1  R)
So to find the EHP, you are looking for how much damage must be applied to shields in order to equal the shield HP, after taking resistances into account. Thus we divide shield HP by (1R) to find the shield effective HP.
Apologies if this was too simplified.

BeastlyRage 24th Imperial Crusade

Posted  2011.03.25 07:21:00  [ 11]
THIS ^^ JUST WON THE GAME
Thank you guys, I get it now :)

Akhmed TDT 
Posted  2011.03.25 18:03:00  [ 12]
There are letters in math now? When this this witchery start? 