Line of Sight

[Asomath]

Is it possible to detect and do things based on a units "Line of sight" through triggers, not JASS. For example "Damage all units in a 180 degree angle on the units front"

Thanks

~Asomath

 

[PurplePoot]

Acos(Cos(A-B)), where A and B are in radians, will return the angle between them (again in radians).

Therefore (the example uses 90 degrees each way, for a total of 180 degrees),

globals
    unit tempUnit //for passing to the enum
    group enumGrp = CreateGroup() //global groups rock
endglobals

function SimpleWindowEnumFilter takes nothing returns boolean
    return Acos(Cos(GetUnitFacing(tempUnit)*bj_DEGTORAD-Atan2(GetUnitY(GetFilterUnit()) - GetUnitY(tempUnit),GetUnitX(GetFilterUnit()) - GetUnitX(tempUnit)))) <= bj_PI/2
endfunction

function SimpleWindowEnum takes nothing returns nothing
    set tempUnit = //your unit
    call GroupEnumUnitsInRange(enumGrp,GetUnitX(tempUnit),GetUnitY(tempUnit),<enum range>,Filter(function SomeWindowEnumFilter))
endfunction

 

[Asomath]

Acos(Cos(A-B)), where A and B are in radians, will return the angle between them (again in radians).

Therefore (the example uses 90 degrees each way, for a total of 180 degrees),

globals
    unit tempUnit //for passing to the enum
    group enumGrp = CreateGroup() //global groups rock
endglobals

function SimpleWindowEnumFilter takes nothing returns boolean
    return Acos(Cos(GetUnitFacing(tempUnit)*bj_DEGTORAD-Atan2(GetUnitY(GetFilterUnit()) - GetUnitY(tempUnit),GetUnitX(GetFilterUnit()) - GetUnitX(tempUnit)))) <= bj_PI/2
endfunction

function SimpleWindowEnum takes nothing returns nothing
    set tempUnit = //your unit
    call GroupEnumUnitsInRange(enumGrp,GetUnitX(tempUnit),GetUnitY(tempUnit),<enum range>,Filter(function SomeWindowEnumFilter))
endfunction

Alright, though it is in Jass, (And I have no idea to do it) I can read up on it. So, there is no way to detect Line Of Sight through GUI?

~Asomath

 

[PurplePoot]

Just apply the same methods as listed in Jass, but in GUI.

The trick is the Acos(Cos(A-B)) thing. Note that all angles in GUI are degrees.

 

[Asomath]

haha, thanks alot. I have recently figured out you can do alot of things with arithmetic in this one.