Variables

[BloodDrunk]

Do I have to create new variable each time I want to use them for new trigger(spell)?

I mean, can i use the same variables created before for any trigger?

 

[Magtheridon96]

Yes.

But this is not always the case, sometimes there are variables that you only need to use for 0 seconds, meaning only for 2 or 3 lines of code and then you don't care about them throughout the rest of the code (TempLoc, TempUnit, TempGroup, TempWidget, TempInteger, etc...)

Those kinds of variables are fine to reuse.

Variables that store things like the caster of the spell to be used in a periodic trigger cannot be shared between spells. (Unless you have this group of spells in which only 1 may be used throughout the game. In that case, it's fine to make those spells share the same variables)

 

[edo494]

well if you have variables that are set in one trigger and used in another you shouldnt.
For instance if you set real a = 3 on init and you want to use it in trigger which has time - elapsed game time is 5.00 or unit starts the effect of an ability you shouldnt change that one.
Basickly if you want some variable to keep the stored value for later you shouldnt use that variable but if you have variable used only within one trigger you can.
Remember that if you use in one trigger wait you should not change those variables either.

Hope it helps

nevermind all this described Magtheridon96 above.

ps: Magtheridon96 do you ever sleep? you seem like you are here 24/7

 

[BloodDrunk]

ok, good to know

 

[BloodDrunk]

and what about if I use variable for damage? can they be reused?

 

[edo494]

if you do something like

• Untitled Trigger 001
  • Set dmg = 150.00
  • Unit - Cause (Triggering unit) to damage (Triggering unit), dealing dmg damage of attack type Spells and damage type Normal

you can.
As I said, if it is used within one trigger and with no waits you can use it freely

 

[BloodDrunk]

That's what i mean , thanks.

I thought I will need to make them for every spell, that would suck

 

[edo494]

I used to do that actually lol

 

[Magtheridon96]

If the spell is instant, share variables, it doesn't matter
Just don't share variables with a periodic spell ^.^

 

[defskull]

I thought I will need to make them for every spell, that would suck

Just like Mag said, if the spell has Instant Effect, you can use TempReal (damage or something), but if it is stored for future use (Periodic Spell for example), you should not use the same variable as it will collide and will bug your data handling.

 

[Dr Super Good]

Variables are storage locations for data.

Global variables last the duration of the process (in WC3 this is the map session) and can be referenced by all functions in their scope (which is all custom functions in JASS).

Local variables last the duration of the stack frame the called function resides in. This means no two different calls will share the same local variables.

WarCraft III does not have efficient support for dynamic memory allocation so it is not possible to create new global storage locations for data during a session.