Example Solution to Main Question
JASS:
Event
call TriggerRegisterUnitEvent( gg_trg_YourTrigger, YourUnit, EVENT_UNIT_DAMAGED )
Action
local unit u = GetTriggerUnit()
if (GetUnitState(u,UNIT_STATE_LIFE) > 0) then
call SetUnitLifeBJ( u, ( GetUnitStateSwap(UNIT_STATE_LIFE, u) + GetEventDamage() ) )
endif
set u = null
One questions the purpose of such a trigger. Perhaps it is better to give it Hardened Skin with 1000 damage absorption, as well as Resistant Skin if desired. The latter is a better alternative for general purposes unless there is a specific requirement in your map to achieve intended results.
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Unit Event Damage
The event triggers each time a unit receives damage from a unique source, be it triggered damage, spells or combat damage. It is important to note that it fires in response to buffs that cause you to lose HP as well. In Aftermath, I had a buff called Open Wounds that causes the unit to lose 2 hp every second. I use the unit damaged event to record the total number of hits a Marine has taken throughout the course of the game. What happened, the hits taken increased by 1 every second due to Open Wounds. As a corrective measure, I added the condition
if (GetEventDamage() > 5) then, since all other sources of damage from the game generally exceed 5.
The advantage of Unit Event Damage over Unit is Attacked is that it fires only when the unit receives actual damage. In combat situations, units may miss and you may not wish for the trigger to fire. It is also more timely, depending on your desired usage.
Implementation for Specific Unit
For World Editor users, there are 2 ways of implementing it :
- preplacing the unit at the start of the game, using GUI to set the event
- Use a custom script line to insert the event for the unit. You will want to define your unit either with a local or global variable prior to this.
JASS:
call TriggerRegisterUnitEvent( gg_trg_YourTrigger, YourUnit, EVENT_UNIT_DAMAGED )
