[Solved] In JASS, how to select the nearest unit?

[Geshishouhu]

In JASS, how to select the nearest unit to my unit? Thanks a lot.

 

[Xonok]

In JASS, how to select the nearest unit to my unit? Thanks a lot.

There is no native for this, so you'll have to do it yourself.
Luckily for you, I have made those functions already.

Note that most of this in here is irrelevant. You can just skip to GetClosestUnitOfGroup

//
//                  Extrafunctions
//
//       This library provides functions that extend
//       the editor functionality and/or make things
//       more efficient.
//
//

globals
    integer ExtraInt
    real ExtraReal
    real ExtraX
    real ExtraY
    unit ExtraUnit
endglobals

library ExtraFunctions
    //System stuff that shouldn't be used outside
    function UnitTypeIsInteger takes nothing returns boolean
        return GetUnitTypeId(GetFilterUnit()) == ExtraInt
    endfunction
    
    function ClosestUnitLoop takes nothing returns nothing
        local unit u = GetEnumUnit()
        local real x = GetUnitX(u) - ExtraX
        local real y = GetUnitY(u) - ExtraY
        local real r = SquareRoot(x * x + y * y)
        if r < ExtraReal then
            set ExtraReal = r
            set ExtraUnit = u
        endif
        set u = null
    endfunction
    
    //Actual functions
    function Debug takes string s returns nothing
        call DisplayTextToPlayer(GetLocalPlayer(),0,0,s)
    endfunction
    
    function GetClosestUnitOfGroup takes group g,real x,real y returns unit
        set ExtraReal = 100000
        set ExtraX = x
        set ExtraY = y
        call ForGroup(g, function ClosestUnitLoop)
        return ExtraUnit
    endfunction
    
    function FindClosestUnitOfType takes integer UnitType,real x,real y returns unit
        local group g = CreateGroup()
        local unit u
        set ExtraInt = UnitType
        call GroupEnumUnitsInRange(g,0,0,100000,function UnitTypeIsInteger)
        set u = GetClosestUnitOfGroup(g,x,y)
        //Clearing up
        call DestroyGroup(g)
        set g = null
        return u
    endfunction
    
    function IntPower takes integer number,integer power returns integer
        local integer i = 1
        local integer resultnumber = number
        if power == 0 then
            return 1
        endif
        loop
            exitwhen i == power
            set resultnumber = resultnumber*number
            set i = i + 1
        endloop
        return resultnumber
    endfunction
    
    function AddUnitState takes unit u, unitstate us, real amount returns nothing
        call SetUnitState(u,us,GetUnitState(u,us)+amount)
    endfunction
endlibrary

function InitTrig_ExtraFunctions takes nothing returns nothing
endfunction

 

[Malhorne]

There is such a system in THW : https://www.hiveworkshop.com/forums/jass-resources-412/snippet-getclosestwidget-204217/

 

[Geshishouhu]

There is no native for this, so you'll have to do it yourself.
Luckily for you, I have made those functions already.

Note that most of this in here is irrelevant. You can just skip to GetClosestUnitOfGroup

//
//                  Extrafunctions
//
//       This library provides functions that extend
//       the editor functionality and/or make things
//       more efficient.
//
//

globals
    integer ExtraInt
    real ExtraReal
    real ExtraX
    real ExtraY
    unit ExtraUnit
endglobals

library ExtraFunctions
    //System stuff that shouldn't be used outside
    function UnitTypeIsInteger takes nothing returns boolean
        return GetUnitTypeId(GetFilterUnit()) == ExtraInt
    endfunction
    
    function ClosestUnitLoop takes nothing returns nothing
        local unit u = GetEnumUnit()
        local real x = GetUnitX(u) - ExtraX
        local real y = GetUnitY(u) - ExtraY
        local real r = SquareRoot(x * x + y * y)
        if r < ExtraReal then
            set ExtraReal = r
            set ExtraUnit = u
        endif
        set u = null
    endfunction
    
    //Actual functions
    function Debug takes string s returns nothing
        call DisplayTextToPlayer(GetLocalPlayer(),0,0,s)
    endfunction
    
    function GetClosestUnitOfGroup takes group g,real x,real y returns unit
        set ExtraReal = 100000
        set ExtraX = x
        set ExtraY = y
        call ForGroup(g, function ClosestUnitLoop)
        return ExtraUnit
    endfunction
    
    function FindClosestUnitOfType takes integer UnitType,real x,real y returns unit
        local group g = CreateGroup()
        local unit u
        set ExtraInt = UnitType
        call GroupEnumUnitsInRange(g,0,0,100000,function UnitTypeIsInteger)
        set u = GetClosestUnitOfGroup(g,x,y)
        //Clearing up
        call DestroyGroup(g)
        set g = null
        return u
    endfunction
    
    function IntPower takes integer number,integer power returns integer
        local integer i = 1
        local integer resultnumber = number
        if power == 0 then
            return 1
        endif
        loop
            exitwhen i == power
            set resultnumber = resultnumber*number
            set i = i + 1
        endloop
        return resultnumber
    endfunction
    
    function AddUnitState takes unit u, unitstate us, real amount returns nothing
        call SetUnitState(u,us,GetUnitState(u,us)+amount)
    endfunction
endlibrary

function InitTrig_ExtraFunctions takes nothing returns nothing
endfunction

There is such a system in THW : https://www.hiveworkshop.com/forums/jass-resources-412/snippet-getclosestwidget-204217/

Thank both of you!

 

[Malhorne]

You're welcome dude