Memory Cleanup

greg_brady · July 7, 2014, 6:39pm

Hi dyson,

I am having a memory cleanup issue. When a game is over, and a user wants to play again, I regenerate the scenario, first removing all sprites and then re-adding them. MTE gets laggier every time they do a Play Again until my game finally dies.

This is what I am doing for cleaup:

    asprite = mte.getSprites()
    if asprite == nil then do return end end

       for i = 1,#asprite do
           if asprite[i] ~=nil then
               mte.removeSprite(asprite[i], true)
           end
       end

       for i = 1, #enemy do
           if enemy[i] ~=nil and enemy[i].isdead ~= true then enemy[i]:removeSelf() end
        end

enemy = nil
enemy={}

Is there something I should be doing to clean out my sprites and re-adding them? (I don’t want to unload my tile map because It is just a single level map that acts like a background canvas.

Thanks, Greg

>> In my game on each time exit, i am cleaning up mte by calling mte.cleanup(). But still my memory is keep on increasing for each game i play . More over i am manually cleaning all the objects which i am creating .

Thanks,

Kumar KS.

greg_brady · July 9, 2014, 5:48pm

Hi Dyson,

I’m having a few problems with v990:

The mte.getsprites now returning nil was a pain but I dealt with it. I noticed a big increase in lag and also my collision detection started messing up when a sprite is close to the edge of the map. I will post more info when I am finished testing.

Did you ever find any problems with memory cleanup when removing sprites? (If so I’d like to retrofit v984 with the fix)

Thanks again, Greg

Azmar · July 9, 2014, 9:09pm

I am having problems with the removeSprite function in general, I don’t think its removing stuff properly or maybe I’m just doing it 100% wrong.

Is how I remove an object:

local function cleanNet(event)
   physics.removeBody(event)
   event:removeSelf() – i just started using this, but if i take it out doesn’t seem to change anything
   mte.removeSprite(event, false) – can’t use true or crash
   event.isVisible = false --needed because doesn’t seem to be niling
   event = nil
   return true
end

I would like to know how to exactly remove a sprite properly, because there is too many problems going on when they aren’t being removed properly. Also when I do just normal remove sprite’s since I can’t use the true part of the function I am stuck with false, the leftover of the sprite is now stuck on corona sdk display so I have to do object.isVisible = false to hide everything…

Gremlin_Interactive · July 10, 2014, 9:14am

How are you calling that function?

Azmar · July 10, 2014, 3:18pm

I call the function just passing the variable in like:

cleanNet(spiderNet) and using the above function to clean it.

More specifically I call it in a onCollision event

EDIT: bad code, fix is edit below

I’ve also done it with a timer in different cases, doesn’t seem to change anything:

Azmar · July 12, 2014, 11:37pm

Gremlin do you think this is a bug? or am I doing the remove process 100% wrong?

EDIT: I ended up solving it thanks! I was being dumb and forgot about the scope rules noob mistake! I needed to return the event in the function and do item.pot_1 = removeItem(item.pot_1); etc.

I no longer have remoreSprite problems anymore!!

greg_brady · July 9, 2014, 5:48pm