[JASS] If/Then/Else with JASS?

[madman9800]

How can do a simple If/Then/Else statement with Jass? More importantly how can i check the value of a Boolean variable using Jass? I set a local variable called "inv" to true by inserting custom script and typing "inv = true" and now i want to CHECK what the value of "inv" is. If it is "true" i want to the text "inv is true" to be shown to all players. If it is "false" i want the text "inv is false" to be shown to all players. Help would be greatly appreciated.

EDIT:
I can do the actions "show text to all players" using GUI...I just want to know how i can make a simple GUI/Jass combination trigger that checks the value of a local boolean then does an action depending on what that value is.

 

[Pharaoh_]

if inv == true then
 call DisplayTextToForce (GetPlayersAll(), "inv is true")
else
 call DisplayTextToForce (GetPlayersAll(), "inv is false")
endif

 

[madman9800]

Thank you however i seem to still have trouble. Here is what im trying to achieve.

EVENT:
--every 1 second of game time
CONDITION:
ACTION:
Pick every unit in playable map area
--local boolean inv = false
--pick every destructable within 200 of picked unit
----if picked destructable is ashenvale tree wall
------then set local variable "inv" to "true"
------add permanent invisibility to picked unit
--if local variable "inv" is "false"
----then removed permanment invisibility from picked unit
----else do nothing

It seems like the problem is with the custom script line "set inv = true" because im getting the error "expected a variable name" when i try to enable the trigger.

 

[Pharaoh_]

Use JNGP to declare local variables.

 

[madman9800]

Use JNGP to declare local variables.

What is JNGP? Why do i have to use it? I don't seem to understand what is wrong with my trigger...

 

[Pharaoh_]

There's nothing wrong with your trigger, it's just local variables can't be declared in GUI with the normal World Editor, I don't know why (but they can normally be declared with vanilla Jass). You can make it happen in JNGP = Jass New Gen Pack = http://www.wc3c.net/showthread.php?t=90999.

 

[madman9800]

Oh kk. i downloaded JNGP and ran it however now its giving me the error "undeclared variable "inv"

EDIT: I did not need to use JASS to achieve what i was doing. Thanks for the help though. +rep

 

[Thunder_eye]

The declaration and the "set" are in two different scopes, I'd suggest using a global.

EDIT: Sorry didn't notice you solved it, should've refreshed the page before I posted.

 

[madman9800]

The declaration and the "set" are in two different scopes, I'd suggest using a global.

EDIT: Sorry didn't notice you solved it, should've refreshed the page before I posted.

I used a global originally but i need local variables because i wanted it to be Multi instancebel...but ya i solved the problem and posted the working trigger on this site for anyone who needs it

 

[Thunder_eye]

I used a global originally but i need local variables because i wanted it to be Multi instancebel...but ya i solved the problem and posted the working trigger on this site for anyone who needs it

As you aren't using any waits, there isn't any need for a local.

• Invisibility Near Trees
  • Events
    • Time - Every 1.00 seconds of game time
  • Conditions
  • Actions
    • Unit Group - Pick every unit in (Units in (Playable map area)) and do (Actions)
      • Loop - Actions
        • Set inv = False
        • Destructible - Pick every destructible within 200.00 of (Position of (Picked unit)) and do (Actions)
          • Loop - Actions
            • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
              • If - Conditions
                • (Destructible-type of (Picked destructible)) Equal to Ashenvale Tree Wall
              • Then - Actions
                • Set inv = True
              • Else - Actions
        • If (All Conditions are True) then do (Then Actions) else do (Else Actions)
          • If - Conditions
            • inv Equal to True
          • Then - Actions
            • Unit - Add Permanent Invisibility to (Picked unit)
          • Else - Actions
            • Unit - Remove Permanent Invisibility from (Picked unit)

Would work fine and is MUI.