Get Nearest Unit (GNU)

[Leazy]

Hello! I'm trying to make a trigger which easily allows me to get the nearest unit. This is what I've done, but it doesn't seem to work:

• Get Nearest Unit
  • Events
  • Conditions
  • Actions
    • Set GNU_Unit = No unit
    • For each (Integer GNU_Loop) from 1 to (Integer((GNU_Range / 20.00))), do (Actions)
      • Loop - Actions
        • Set GNU_Group[2] = (Units within ((Real(GNU_Loop)) x 20.00) of GNU_Point matching (((Matching unit) is in GNU_Group[1]) Equal to True))
        • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
          • If - Conditions
            • (GNU_Group[2] is empty) Equal to False
          • Then - Actions
            • Set GNU_Group[3] = (Random 1 units from GNU_Group[2])
            • Unit Group - Pick every unit in GNU_Group[3] and do (Set GNU_Unit = (Picked unit))
            • Special Effect - Create a special effect attached to the overhead of GNU_Unit using Abilities\Spells\Human\DispelMagic\DispelMagicTarget.mdl
            • Special Effect - Destroy (Last created special effect)
          • Else - Actions
        • Custom script: call DestroyGroup(udg_GNU_Group[1])
        • Custom script: call DestroyGroup(udg_GNU_Group[2])
        • Custom script: call DestroyGroup(udg_GNU_Group[3])
    • Custom script: call RemoveLocation (udg_GNU_Point)

Test trigger:

• Untitled Trigger 001
  • Events
    • Player - Player 1 (Red) skips a cinematic sequence
  • Conditions
  • Actions
    • Set GNU_Point = (Position of Demon Hunter 0000 <gen>)
    • Set GNU_Range = 800.00
    • Set GNU_Group[1] = (Units within GNU_Range of GNU_Point matching ((((Matching unit) belongs to an enemy of (Owner of Demon Hunter 0000 <gen>)) Equal to True) and (((Matching unit) is alive) Equal to True)))
    • Trigger - Run Get Nearest Unit <gen> (checking conditions)

The problem is that no unit is picked.

 

[Accname]

1). Pick all units in a certain range and save them in a unit group.
2). Select a random unit from that group and set it to be the nearest unit.
3). Iterate through all units in the group and compare the distances.
4). when you find a unit which is even closer set this unit to be the new "nearest" unit.
5). After the first iteration through the group you got what you are looking for.

 

[DrEvil]

Accname's suggested way is the most common to find the closest unit.

Just to further explain to Leazy, some pseudo-code as to what is described:

//GNU_Unit =null;
GNU_Curdist=800;
// set it to the max range, this way you don't have to pick a random unit, and therefore not compare it to itself later on.
For(Each unit in GNU_group){
    GNU_Distance = Distance from (Original Point and 'Picked Unit'(?))
    if(GNU_Distance<GNU_Curdist)
        GNU_Unit='Picked Unit'
        GNU_Curdist=GNU_Distance
}
//GNU_Curdist should equal the distance from the center point and GNU_Unit

 

[Leazy]

Ah yeah that idea is much better than mine, thanks Accname!


No worries, I know how to do it, thanks anyway though DrEvil