[JASS] local variables

[Ironside]

Hello, I have a question:

local variables are automatic MUI if used correctly, but they can only be used in the function that they are declared...

But for example, when making spells with timers and things like that, you need to give it a function, and then those actions in it are executed. So problem is, I need my locals from the main action function in the timer function... Is there any way to send the locals into that timer function and use them in there?

Hope I make sense :O

 

[Pharaoh_]

You can use hashtables to store those values on the timer.

 

[Ironside]

problem is I just can't get to understand the hashtable :/ that's why I'm looking for a way I described if there is a way

 

[Pharaoh_]

Well, this is supposed to be simple, so, if you can't do it, then drop Jass for now. I mean, if you can't use TimerUtils, you won't stand a chance of nice coding, cause I guess you want this for the Hero Contest (in which much of stuff is restricted).

 

[Ironside]

No i don't need for hero contest, I just want to be able to create MUI knockbacks and such spells

 

[Pharaoh_]

Well, why don't you try the Spells section then? There already are examples of how to attach values on timers. I guess most of them use TimerUtils, but there are others, e.g. http://www.hiveworkshop.com/forums/spells-569/adiktuz-elemental-spellpack-1-1-a-159601/ . I'm speaking of the Meteor Storm spell. I don't really think vanilla Jass can do the job.

 

[Ironside]

I did try, but's it's too much code to find what I'm looking for there. Expecialy since there are alot of thing that I don't understand in them (like scopes, library, struct and some this.u and such variables)

 

[Kanadaj]

Hmm... Why don't you use normal Variables for that? Oo

But at all...

set udg_Ammo[1] = 1

it's more than enough for what you need xD

 

[Ironside]

Because Globals aren't auto MUI, you need use indexing or hashtable or something

 

[Kanadaj]

call udg_Variable? XD If you won't stop being so much maximalist, I'll punch you xD

 

[Pharaoh_]

Barathrum, you can't ask for MUI, when you don't sit your arse down to learn about those stuff. It's not magic. If you want to get the results you want, work harder. Start learning vJass, since you want Jass ways. If you don't understand hashtables nor libraries nor scopes, simply don't use Jass and prefer GUI.

 

[Ironside]

GUI MUI seems even harder to me, and I prefer JASS since faster typing and better looking and auto MUI locals for single function triggers...
Wish blizzard made the auto MUI for globals too :S

 

[Kanadaj]

And about the hashtables: if you know how to make the easyest functions in excel, then you can use it xD It's just like a coordinate system: At every coodrinate there can be a value See, not that complex xD The only thing you must learn is the call functions, although you can easily copy-paste it's function and rewrite the spaces you want You see, I always do that if I don't know a script

 

[Ironside]

Yeah I'm very good with excel

That's true, but locals don't have a value in array, they are all same named, so they would overwrite themselves... it's different with auto increment arrays since you can make it store into field 1 + current array of caster variable for example...

EDIT: and offcourse I'll never give up, I never do, I just try to find an easy path

 

[Mooglefrooglian]

Yeah I'm very good with excel

That's true, but locals don't have a value in array, they are all same named, so they would overwrite themselves... it's different with auto increment arrays since you can make it store into field 1 + current array of caster variable for example...

EDIT: and offcourse I'll never give up, I never do, I just try to find an easy path

what. does. this. even. mean.

Also, to the OP: if you don't understand something, LEARN. I don't understand why "I don't know how" is a reason for anything.

 

[PurgeandFire]

A basic usage of hashtables to attach in jass is like this:

globals
    hashtable MyHash
endglobals
function MySpellKnock takes nothing returns nothing
    local timer t    = GetExpiredTimer()
    local integer id = GetHandleId(t)
    local unit tar   = LoadUnitHandle(MyHash,id,0)
    local integer c  = LoadInteger(MyHash,id,5) //counts the # of times ran
    local real x     = GetUnitX(tar)
    local real y     = GetUnitY(tar)
    local real Mdist = LoadReal(MyHash,id,4)
    local real ang   = LoadReal(MyHash,id,3)
    local real newX  = x+(Mdist/c)*Cos(ang)
    local real newY  = y+(Mdist/c)*Sin(ang)
    local real fDx   = LoadReal(MyHash,id,1)-newX
    local real fDy   = LoadReal(MyHash,id,2)-newY
    local real fDist = fDx*fDx+fDy*fDy
    
    call SetUnitX(tar,newX)
    call SetUnitY(tar,newY)
    call DestroyEffect(AddSpecialEffect("Your effect's path",newX,newY))
    
    if fDist <= 1225 then
        call PauseTimer(t)
        call DestroyTimer(t)
        call FlushChildHashtable(MyHash,id)
    endif
    call SaveInteger(MyHash,id,5,c+1)
    
    set t   = null
    set tar = null
endfunction

function MySpellAct takes nothing returns nothing
    local timer t    = CreateTimer()
    local integer id = GetHandleId(t)
    local unit cast  = GetTriggerUnit()
    local unit tar   = GetSpellTargetUnit()
    local real x     = GetUnitX(cast)
    local real y     = GetUnitY(cast)
    local real tx    = GetUnitX(tar)
    local real ty    = GetUnitY(tar)
    local real distX = tx-x
    local real distY = ty-y
    local real ang   = Atan2(distY,distX)
    local real dist  = (SquareRoot(distX*distX+distY*distY))/2
//will send the unit away half the distance between the caster and target 
    
    call SaveUnitHandle(MyHash,id,0,tar)
    call SaveReal(MyHash,id,1,tx+dist*Cos(ang))
    call SaveReal(MyHash,id,2,ty+dist*Sin(ang))
    call SaveReal(MyHash,id,3,ang)
    call SaveReal(MyHash,id,4,dist) 
    call SaveInteger(MyHash,id,5,0)
    
    call TimerStart(t,0.035,true,function MySpellKnock)
    
    set t    = null
    set cast = null
    set tar  = null
endfunction
function MySpellCond takes nothing returns boolean
    return GetSpellAbilityId() == 'A000'
endfunction
function InitTrig_MySpell takes nothing returns nothing
    local trigger t = CreateTrigger()
    set MyHash = InitHashtable()
    call TriggerRegisterAnyUnitEventBJ(t,EVENT_PLAYER_UNIT_SPELL_EFFECT)
    call TriggerAddCondition(t,Condition(function MySpellCond))
    call TriggerAddAction(t,function MySpellAct)
    set t = null
endfunction

Just an example though, I haven't tested if it works. But you get the idea.. For every new timer created, a new handle id will be assigned. This kind of allows you to save each hashtable's data into a separate container.

Say you have to package away a bunch of boxes. You load the same inventory over and over doing backbreaking labor. As each timer is created, there will be a new box. On the box will be its very own label. Now, you must store items in the box (hashtable). So you start stuffing the data, all the paperwork and numbers and everything and squeeze it into the box. The box gets shipped out now to a conveyor belt, this is kind of like the timer initiating.

Now you get the data processed, they will do what they need to do with the inventory. They will go and polish it, move it around, fix it, and ship it. But once they are done using the box and the time is right, they'll destroy it. They'll destroy the box and it's inventory will void. (FlushChildHashtable) The box will then stop its transport (Timer destroyed) and it will just fall off the conveyor belt into a recycling bin. Now that the label for the box is gone, the people are now allowed to use that number again. (As each timer is destroyed, their handle id becomes free to use once again) Now the box is put back together from its recycled parts and the process begins again.

Not the clearest explanation, but it might help a bit to understand what the values are meant to do.

 

[Ironside]

Oh, didn't know there was a way like that, well that's much more easy then GUI then in my opinion. Thanks for all the help.

 

[Anachron]

Actually you are storing things in structs, which is a lot better.

 

[Ironside]

I've read a tutorial about the structs, it had a part that you can store things, but didn't quite understand it

 

[Justify]

A struct is just a package of variables. A bunch of the, together in something we call structs (think of it as a box with all the variables inside). Now you only attach the struct to get the data back.

 

[Anachron]

Check this post I made.

 

[Ironside]

Check this post I made.

Yeah I know that part, then you can use those variables like

call KillUnit(this.youCanAccessMeFromAnywhere)

but that doesn't help much, it's a global not auto MUI...

 

[Justify]

There is nothing about "auto MUI". Locals are just created each time again and again, making it impossible to collide. Structs are ARRAYS, not normal globals. vJass automaticly allocates new instances and calculates the correct array index, you don't see anything of this. Structs ARE MUI as long as you keep creating and destroying them correctly.

 

[Ironside]

but in the tutorial given there is missing variables u and i... and how can it take u and i if they're not declared and also what's with this local thistype this = thistype.allocate()

And also I don't see when to use Library, when Scope and when struct

 

[Anachron]

you don't need to type this.u when you are inside the struct instance.
You can just type .u or even u.

When it isn't a local the struct variable will be used. When there is no struct variable, a global will be used. If there isn't a global, an error occurs.

Thistype.allocate() creates a new struct instance. A new object.
You work with objects.

Library is used for Systems.
Scopes are used for Spells and System tests.

Scope are automatically declared after librarys.

 

[Ironside]

I'd have to practice that part, because I still don't understand hardly anything

 

[Kanadaj]

what. does. this. even. mean..

It sounds like you're a noob to Hashtables/excel/variables xD

 

[Ironside]

Nah I just express myself bad...