Set damage taking into account the armour

Hi, I want to make it so when a snowball hits a player, it damages them the same amount of damage as an iron sword. Though, I know about using event.setDamage() in EntityDamageByEntityEvent, but I don't know how to take into account the damaged player's armour. Is there a way to get the final damage based on their armour?

I hope there's already a util in the resource section. :S This'd take ages to write if I based it off of:
http://minecraft.gamepedia.com/Armor#Defense_statistics

 

KingFaris11
Some code on a thread: http://forums.bukkit.org/threads/get-armor-points.67970/#post-1050549

 

Ohhhh ty :] So the way I would use this is something like:

Code:

double newDamage = <ironSwordDamage> - this.getDamageReduced(damaged);
if (newDamage <= 0D) newDamage = 1D; // To make sure they definitely do get damaged.
event.setDamage(newDamage);

Right?

 

KingFaris11
Actually, the code would return a double which represents the percentage of the damage reduced.
Like how full diamond armor reduces damage by 80% so the code would return 0.8

 

Oh...
So I'd do something like:

Code:

double newDamage = 14 * this.getDamageReduced(damage); // Iron sword does 7 hearts (14 damage)
if (newDamage <= 0D) newDamage = 1D; // To make sure they definitely do get damaged.
event.setDamage(newDamage);

 

KingFaris11
I would probably go like this:

Code:java

double reducedPercent = this.getDamagedReduced(damaged);
double reducedDam = 14 * reducedPercent;
double finalReducedDam = 14 - reducedDam;