How to detect the unit another one comes in range with?

[Spartipilo]

"A unit comes withing 400 distance of unit X"

The Triggering Unit is the unit that came withint 400 distance, but how to detect the "UnitX" (specially if it has locust)?

 

[deathismyfriend]

U can use a trigger unit in range. Or use a group enumeration and add the unit in there b4 u add locust to that unit and then u can use the group to see we're the unit is. If its only a few units use a unit array.

 

[BloodDrunk]

group enumeration = Unit Group picking

 

[Spartipilo]

Pick every unit doesn't detect units with locust.

And how to pick exactly the UnitX the other one came at range with?

 

[Nestharus]

https://www.hiveworkshop.com/forums/jass-resources-412/snippet-unitinrangeevent-205036/

function GetEventSourceUnit takes nothing returns unit

 

[Zwiebelchen]

Remember that the unit in Range event and the snippet Nes posted are not instant.

 

[Nestharus]

Oh, and u can't detect locust unless you do a player group enum.

You can always go to a quad tree approach, but that'd require quite a bit of coding =).

 

[rulerofiron99]

If it needs to be instant, you could register each "within range" event, adding the unit to a unit group array (indexed by the unit it would be coming in range of), and then find the unit within range by process of elimination (compare registered group to group of units in range).

 

[Zwiebelchen]

You can always go to a quad tree approach, but that'd require quite a bit of coding =).

Would not make much sense, performance-wise, as I'm pretty sure area enumerations use a quad or boolean tree approach anyway, since the runtime varies a lot depending on how crowded the area is you are enuming, even if the number of units on the map is a constant.

 

[Spartipilo]

The thing was to do something for units within certain range, and remove the effects when they come further away. I decided just to pick units withing Range+10 or something, and periodically check distance (which i do anyway) and use a ITE based on that.

Thanks everyone!