The structy way..

[Chaos_Knight]

I was wondering what this does:

struct Data
unit u
unit t
real x
real y
integer whatever /* AnD MoRe */

They doesnt have values so, i assume they do: nothing. Dont understand the purpose of structs.
Thanks for helping me out with this.

//Chaos_Knight

 

[Komaqtion]

Well, all variables doesn't have to have values directly, do they ?

Actually, most structs can't have values directly, as they're manually created for different purposes throughout the game

I'd believe that the struct you're having there is used to save the x and y of the caster/target, and also sae both the target and caster i those members :S
This is very useful in making spells MUI if you need some kind of delay, because then you can use one of the many timer attachment systems out there, like KeyTimers2, TimerUtils or Timer32, to attach the struct to that specific timer, and when it expires you can retrieve that data from the timer, and you'll be able to keep on going just like "nothing has happened" XD

 

[Chaos_Knight]

But, where do i set the values from the struct? Cause all uses of structs i see is like this:

[lJASS]call UnitDamageTarget(d.caster,d.caster/*More Arguments Here */[/lJASS]

What does the Dot syntax do?

 

[Trollvottel]

Do you know the Jass Helper Manual? It kind of explains how structs work. Also check out the wikipedia article about Object Oriented Programming.
(i guess this is easier than explaining everything to you and to the next one and so on...)

 

[Chaos_Knight]

Havent seen those before. Sorry.

 

[Nherwyziant]

Havent seen those before. Sorry.

lol lie

 

[Chaos_Knight]

haha. Okay, forgot. Happines?

 

[Tyrulan]

Those variables would most likely be passed into the structs constructor method.

struct data
        unit caster
        static method create takes unit u returns thistype
                local thistype this = thistype.allocate()
                set .caster = u
                return this
        endmethod
endstruct

 

[SineCosine]

Structs are like little bubble-universes!
They're what make spells MUI-MPI xD

Nothing can exist outside of the universe.. Except another universe, right?

struct Universe

 //Stuff
endstruct

So, let's say, in the beginning, there was darkness..

struct Universe

     Darkness = true
endstruct

Then, I said, 'let there be light'

struct Universe

    Darkness = true

    static method CreateLight takes nothing returns nothing //A method is basically a function.. In disguise >.>
        local thistype this = thistype.allocate()

        if Darkness == true then
            call BJDebugMsg("SineCosine: Let there be light!")
            call FogEnable(false)
            set Darkness = false
        endif
        
        call this.destroy()
    method
endstruct

I know that you sure as hell do not need structs to do that, but, meh, I'm bored.

 

[Monovertex]

They're what make spells MUI-MPI xD

Not entirely true, there were MUI-MPI spells way before the vJass era . Of course, it makes the process of creating MUI spells easier, but that's a different thing.

 

[SineCosine]

Ugh, details xD

 

[Chaos_Knight]

Structs are like little bubble-universes!
They're what make spells MUI-MPI xD

I got 10- rep for saying so sine! Shame on you! Not fair!

 

[Lyerae]

What does the Dot syntax do?

It lets you access struct members.
Syntax for this is [ljass]structIdentifier.memberName[/ljass].

Structs are a little confusing at first, but they get a lot easier.

 

[tooltiperror]

And, Kingyking made this sexy little 3D array thing with structs you can search for.

On the topics of structs, they're not actual OOP, or so Vexorian said.