Strange Behaviour

[joelkaka]

Hi All,

I am observing a strange behavior , I have my game.lua where I show a Vungle Ad for an additional life in the game. The flow is something like this

game

All lives Over
show Vungle ad
Vungle Listener adds a life after successful view
Game continues
additional life consumed and game over. Note : My variable no_of_grids = x
Reload this scene to play again
All lives over ( My Variable no_of_grids = y)
Show Vungle Ad
Vungle Listener adds a life after successful view
Game continues

Here is the problem. The game continues with no_of_grids = x !! And reload of a scene (with best practices of removescene, purge scene) is done during the sequence… dont know why the previous scene variables are remembered

this is the reload code :

storyboard.removeScene( “game” )
storyboard.gotoScene( “game”, “fade” , 500 )

Please let me know if this is a mistake from my side

regards
Joel

[joelkaka]

still drilling down, and simplifying the flow to reproduce the issue - 

 

• Show Vungle Ad

(now my variable no_of_grids = 5)

• Ad View is successful, as shown by listener

• Reload scene

(now my variable no_of_grids is initialized to 0)

• Show Vungle Ad

(just before beginning, the variable no_of_grids, as expected is 0)

• Ad View Successful

 

NOW, after the ad view is successful and the control comes back to Corona (after system suspend) , the variable foo is 5. I have no clue why this is happening. I tried different combinations , but whatever I do, the value what I gave in earlier scene is reflecting ! The fact that there is a reload scene and after re-load is correctly set to 0. JUST that when i try to show Vungle ad for a second time , it *somehow* takes the variable values of a old scene !

 

I have written to Vungle as well… anyone with the knowledge of this , please reply! appreciate it

 

regards,

Joel

[rob]

I think we are going to need to see some code.  This sounds like a scope issue

local x = 10

if x < 20 then

     local x = 30

end

print(x) – print’s 10.

This can happen by a rogue “local” as scene above, but it can happen from building a closure() type function where it preserves the variable from function call to function call.  And of course you could be doing something globally and writing over it somewhere else.

Rob

[joelkaka]

Thanks Rob.

I did some more debugging. I see that on every reload of the scene the memory consumption gets increasing although same scene is loaded. I saw a lot of literature around reloading (using gotoscene and inntermediate scene) and i follow most of it.

There is my game.lua. most of the display objects are in display group. Whichever is not , i do a display.remove and nil them out. I nil out all audio handles as well. Also any intermediate display objects (like moving coins and tap to collect them - I nil them out as soon as they are tapped )

I do a removescene of “game” in exitScene so that my main chunk gets re-executed. In the intermediate scene I remove my previous scene again in its createscene and enterscene just to be safe.

I dont closure/anonymous functions (will review again). Is there anything I should take care of while reloading via intermediate scene ? I reload using gotoscene. 

this is a last attempt to find if I have missed anything. Will post my code if you cannot make out anything here!

[joelkaka]

still drilling down, and simplifying the flow to reproduce the issue - 

 

• Show Vungle Ad

(now my variable no_of_grids = 5)

• Ad View is successful, as shown by listener

• Reload scene

(now my variable no_of_grids is initialized to 0)

• Show Vungle Ad

(just before beginning, the variable no_of_grids, as expected is 0)

• Ad View Successful

 

NOW, after the ad view is successful and the control comes back to Corona (after system suspend) , the variable foo is 5. I have no clue why this is happening. I tried different combinations , but whatever I do, the value what I gave in earlier scene is reflecting ! The fact that there is a reload scene and after re-load is correctly set to 0. JUST that when i try to show Vungle ad for a second time , it *somehow* takes the variable values of a old scene !

 

I have written to Vungle as well… anyone with the knowledge of this , please reply! appreciate it

 

regards,

Joel

[rob]

I think we are going to need to see some code.  This sounds like a scope issue

local x = 10

if x < 20 then

     local x = 30

end

print(x) – print’s 10.

This can happen by a rogue “local” as scene above, but it can happen from building a closure() type function where it preserves the variable from function call to function call.  And of course you could be doing something globally and writing over it somewhere else.

Rob

[joelkaka]

Thanks Rob.

I did some more debugging. I see that on every reload of the scene the memory consumption gets increasing although same scene is loaded. I saw a lot of literature around reloading (using gotoscene and inntermediate scene) and i follow most of it.

There is my game.lua. most of the display objects are in display group. Whichever is not , i do a display.remove and nil them out. I nil out all audio handles as well. Also any intermediate display objects (like moving coins and tap to collect them - I nil them out as soon as they are tapped )

I do a removescene of “game” in exitScene so that my main chunk gets re-executed. In the intermediate scene I remove my previous scene again in its createscene and enterscene just to be safe.

I dont closure/anonymous functions (will review again). Is there anything I should take care of while reloading via intermediate scene ? I reload using gotoscene. 

this is a last attempt to find if I have missed anything. Will post my code if you cannot make out anything here!