Giving this disclaimer before we get started... using San's Calc is a lot easier. It will calculate this for you. However, with patch 0.4.0.0 just coming out, I doubt it's been updated. Once it has been updated, I'll remove this warning.
Look under the Weapon Damage Calculator section for getting Effective WPF.
https://0b176db51ec327b013e6b005fde2cca145eb9267.googledrive.com/host/0Bzs1vJv0tQLHZ3AwLUQ0Tkt0djg/calc.html--------------------------------------------------------------------------------------------------------------------------------------------------------------
Let me put hard number to the formula that San posted... as it may help others understand.
Level 34
Strength: 18
Agility: 21
Hit points: 65
Ironflesh: 6
Power Strike: 6
Shield: 3
Athletics: 7
Power Throw: 6
Weapon Master: 7
Polearm: 101
Throwing: 140
Using San's formula to find my "Max" armor weight, I'd use IF to determine this. Why? Because...
STR = 18 -> (18/3)+1 = 7
IF = 6 -> 6*2 = 12
You use the greater value... so I have a "Max" armor weight of 12. This is nice, because in the past, it was set at 10. So if a Ranged player has a high amount of IF, it helps them to wear heavier armor.
Head = 1.7 (Saracen Helmet with Long Turban)
Body = 10.3 (Saracen Lamellar Cuirass)
Arms = 0.3 (Leather Gloves)
Legs = 0.1 (Serbian Ankle Boots)
So, plugging in my armor into the formula... along with my 12 max armor weight.
Head = 1.7 * 2 = 3.4
Body = 10.3
Arms = 0.3 * 6 = 1.8
Legs = 0.1
-----------------------------------
Total Weight = 15.6
Effective Armor Weight = (Total Weight - Max Armor)^1.12
(15.6 - 12) = 3.6^1.12 = 4.2
So my effective weight is 4.2. Which means that a penalty will be incurred for being 4.2 effective weight.
Now how many points of WPF are penalized for my 4.2 Effective Armor Weight. We'll calculating this penalty from the formula in the Mechanic's Mega Thread:
Armor weight modified proficiency = base proficiency * (1 - 0.01 * effective armor weight)
Going to work the formula in pieces, starting at the end:
1 - (.01 * 4.2) = .958
So, with my base throwing WPF at 140:
140 * .958 = 134.12
If I had base Thrwoing of 140, but now have 134.12... that means I have a 5.88 penalty to my WPF because of armor. From what I know, this is round to 6.
So I have a penalty of 6 WPF incurred because of armor. Mind you, I'd still have another 66 WPF penalty because of Power Throw. You take your PT*11 to find that. For every point of Power Throw, you have a WPF penalty. This means the more PT you have, the greater the penalty. As mentioned, it is PT*11. This is different for Power Draw. Not sure what the value is... but I know it's not PD*11.
So with that, my actual WPF is:
Base WPF - PT Penalty - Armor Weight Penalty = Effective WPF
140 - 66 - 6 = 68
I believe this is correct! Hope this helps someone out.
------------------------------------------------------------------------------------------------------------------------------------------------------
As mentioned at the top of the post using San's Calc is a lot easier. It will calculate this for you. However, with patch 0.4.0.0 just coming out, I doubt it's been updated. Once it has been updated, I'll remove this warning.
Look under the Weapon Damage Calculator section for getting Effective WPF.
https://0b176db51ec327b013e6b005fde2cca145eb9267.googledrive.com/host/0Bzs1vJv0tQLHZ3AwLUQ0Tkt0djg/calc.html