[JASS] Boolexprs

[Silvenon]

I wanted to create a boolexpr that filters all enemies of owner of caster, but i'm not sure how to do that, how to transfer unit to that function? Or do I have to use handles?

example:

function TargetCondition takes nothing returns boolean
    return IsUnitEnemy(GetFilterUnit(), GetOwningPlayer(<caster>??)
endfunction

function Actions takes nothing returns nothing
    local unit c = GetTriggerUnit()
    local boolexpr b = Condition(function TargetCondition)
    local group g = CreateGroup()
    call GroupEnumUnitsInRange(g, GetUnitX(c), GetUnitY(c), 500, b)
    ....
    ....
    ....
endfunction

How do I do this?

 

[PurplePoot]

use a BJ global, since it's an instant pass.

Eg.

function TargetCondition takes nothing returns boolean
    return IsUnitEnemy(GetFilterUnit(), GetOwningPlayer(bj_ghoul[100]) )
endfunction
function Actions takes nothing returns nothing
    local group g = CreateGroup()
    set bj_ghoul[100] = GetTriggerUnit()
    call GroupEnumUnitsInRange(g, GetUnitX(c), GetUnitY(c), 500, Filter(function TargetCondition))
endfunction

 

[UnMi]

Try GetTriggerUnit()

 

[PurplePoot]

Does that actually work through boolexprs? Never bothered to test it ><

 

[PurgeandFire]

Can't you just initialize a regular global at map init?

 

[Silvenon]

Yeah, never thought of that.....thanks everybody, UnMi, your idea would work, but this example I showed was not the one I had in my spell, that Condition was in the other function where there are no event responses. PurplePoot, yeah, that works, just remember the GUI Pick Every Unit In Region Matching, in this 'matching' GetTriggerUnit() would work. Anyways thanks for help

 

[paskovich]

It may occur in some situations, that you want to pass other variables to filters. That can be done with the "looping through group" method.

loop
set u = FirstOfGroup(g)
call GroupRemoveUnit(u,g)
exitwhen u == null
if <filtering> then
//do actions
endif
endloop

But I heared that this is slower than the "filtering" method.

 

[PurplePoot]

You can use bj globals, so it's a little impractical to have the if there, pask.