Question about an array of structs

[enyeas]

Hey,

I have a struct with some stuff that I am using for a custom stat system. I am not sure why, whether I am getting the syntax wrong, or some other logical error, but I can't save/read values correctly.

I have the following code in my map header:

struct heroData
   integer MeleeDamageModifier = 0
   integer SpellDamageModifier = 0
   integer DodgeChance = 0
endstruct

globals
   heroData array hData
endglobals

And then I have a function that does these actions when I type "-test"

private function Actions takes nothing returns nothing
   set hData[0].DodgeChance = 10
   set hData[1].DodgeChance = 20
   call MessageAll("Dodge Chance for P1 = "+I2S(hData[0].DodgeChance))
   call MessageAll("Dodge Chance for P2 = "+I2S(hData[1].DodgeChance))
endfunction

My output is:

Dodge Chance for P1 = 20
Dodge Chance for P2 = 20

So its overriding the value or I am reading it incorrectly or something. Any ideas?

Thanks
-enyeas

 

[Justify]

Well, you need to allocate the instances? Use create? Or, if you want to use it as arrays, type this:

struct heroData extends array
   integer MeleeDamageModifier = 0
   integer SpellDamageModifier = 0
   integer DodgeChance = 0
endstruct

private function Actions takes nothing returns nothing
   set hData[0].DodgeChance = 10
   set hData[1].DodgeChance = 20
   call MessageAll("Dodge Chance for P1 = "+I2S(hData[0].DodgeChance))
   call MessageAll("Dodge Chance for P2 = "+I2S(hData[1].DodgeChance))
endfunction

 

[enyeas]

What would be the difference with allocating the instances or extending it as an array? And would I just type something like

globals
   heroData array hData.Create()
endglobals

Thanks for the help, it makes sense now and i'm not completely baffled, which is a nice step forward Not too many tutorials out there on using arrays of structs :/

 

[Dr Super Good]

Vjass is normal JASS but with some shortcuts...

You can not call non native functions in the globals part of the map.

You have to go...
set hData[0] = heroData.create() //May have spelling or case wrong with the create.
set hData[1] = heroData.create()
set hData[0].DodgeChance = 10
set hData[1].DodgeChance = 20
rest actions here...

Read the documentation, it will tell you all you need to know.

 

[enyeas]

Okay, so that would all go in a function that starts 0.1 seconds into the game? Thanks

edit: attempted and works successfully, thanks guys

 

[Justify]

Just to answer your other question:

A struct that extends array isn't a normal struct anymore. You cant "create", "allocate" or "destroy" them, the behave like normal arrays and you can't use arrays inside of them.
For example usefull, if you require a struct per player, making it an array to access the structs via playernumber.

 

[enyeas]

okay thank you

 

[Teelo]

Yes, jass doesn't have native support for multi-dimensional arrays. You have to mess with pointers, which structs will do you, long as you use them properly.

 

[Dr Super Good]

Structs are nothing more than arrays themselves meaning you can only have a finite number of structs unless you join arrays together which slows down the whole system.