Calculate damage taken then remove damage from custom value?

[aple]

I'm working on recreating Protoss Shields from StarCraft. I think I have the basic idea but I'm not really experienced with WC3 triggers so I'm not sure how I would calculate the damage then remove that damage from a custom value.

This is what I have so far:

• Footman
  • Events
    • Unit - A unit Is attacked
  • Conditions
    • And - All (Conditions) are true
      • Conditions
        • (Custom value of (Attacked unit)) Less than or equal to 100
        • (Custom value of (Attacked unit)) Greater than 0
  • Actions
    • Unit - Cause (Attacking unit) to damage (Attacked unit), dealing 0.00 damage of attack type Normal and damage type Normal

 

[HungryHusky]

You need a damage detection system for that, and most DDS systems use custom values of units, so you probably have to make local values/MUI with variables.

Event
"A unit is attacked" won't work.

Imagine if a ranged unit attacks and before that projectile lands another projectile is fired, thus messing up the damage calculated for the first projectile.

 

[Zunariel]

Search for Bribes Damage Detection System it´s very easy to understand and contains this feature where you can modifier the damage when it´s dealt