Loop for a game.

[Aircer]

Hello,

I'm sure that my question has been asked many times but I can't find the proper solution.

I've created a game where the action take place in the frame 2. Everytime that the animation goes to frame 3 I use gotoAndPlay(2) to have an infinite loop. It works but  I think this is not a clean way to do it,. I read about the function sym.play() but I dont know how to use it,

Thanks.

[kglad]

typically some block of code executes repeatedly (in frame 2) that accounts for the animation.  put that block of code in a function and call that function using a timer or enterframe loop.

[Aircer]

Okay but how I do that ? I tried enterframe loop like this:

addEventListener(Event.ENTER_FRAME, doStuffConstantly);

function doStuffConstantly(evt:Event):void

{

  if(hit)

{

  if (branche.hitTestObject(gobranche))

  {

  gotoAndPlay(4);

  }

}

}

but i got error 1009...

[kglad]

if error is because of the code you posted, branche or gobranche don't exist when the code executes.

click file>publish settings>tick 'permit debugging' so you can see the line number with the error.

[Aircer]

I still dont get it.

Indeed, if i do:

addEventListener(Event.ENTER_FRAME, doStuffConstantly);

function doStuffConstantly(evt:Event):void

{

  if(hit)

{

  if (branche.hitTestObject(gobranche))

  {

  trace(5);

  }

}

}

The code works perfectly so I suppose that branche and gobranche do exist. But when I use gotoandplay() there is the error 1009 and I dont understand why.

[kglad]

if that's true, there's probably code on frame 4 causing the error.

but again click file>publish settings>tick 'permit debugging' so you can see the line number with the error so making inferences about what's causing the error is unneeded.

[Aircer]

Ok so I get: TypeError: Error #1009: Cannot access a property or method of a null object reference.

  at testbouton_fla::MainTimeline/doStuffConstantly()[testbouton_fla.MainTimeline::frame3:43]

The line 43 is where I have: if (branche.hitTestObject(gobranche)) , In the frame 4 I only have: stop();

[kglad · Accepted solution]

then branche or gobranche don't exist when the code executes.

use the trace function to find which and confirm.