Problem of Sprites and labels are displayed by white boxes.

cocos2d for iPhone » Programming » cocos2d support (graphics engine)

Problem of Sprites and labels are displayed by white boxes.

(6 posts) (3 voices)

Started 1 year ago by srikanth
Latest reply from adik

Tags:

srikanth
Member

I am writing a game in cocos2d. I am using a function restartDirector in AppDelegate class.

-(void)restartDirector{

	[[CCDirector sharedDirector] end];

	[[CCDirector  sharedDirector] release];

	if( ! [CCDirector setDirectorType:CCDirectorTypeDisplayLink] )
	[CCDirector setDirectorType:CCDirectorTypeDefault];

	[[CCDirector sharedDirector] setPixelFormat:kPixelFormatRGBA8888];
	[CCTexture2D setDefaultAlphaPixelFormat:kTexture2DPixelFormat_RGBA8888];

	[[CCDirector sharedDirector] setAnimationInterval:1.0/60];
	[[CCDirector sharedDirector] setDisplayFPS:YES];
	[[CCDirector sharedDirector] setDeviceOrientation:CCDeviceOrientationLandscapeLeft];

	[[CCDirector sharedDirector] attachInView:window];

}

This function I called in one of the game Scene .

-(void)PracticeMethod:(id)sender
{
	[MY_DELEGATE restartDirector];

	CCScene *endPageScene = [CCScene node];
	CCLayer *endPageLayer = [DummyScene node];

	[endPageScene addChild:endPageLayer];

	[[CCDirector sharedDirector] runWithScene:endPageScene]; 

//	[[CCDirector sharedDirector] replaceScene:endPageScene];
}

When used the replaceScene, there is no problem in game but the memory of abject allocation is high(I checked in leaks tool).
So I used runWithScene.
But , while using these when the scene DummyScene is loaded the sprites, labels in it are displayed by white boxes. I cannot see the sprites are labels.
I am using replaceScene everything thing is working fine.
this is my problem.

Thank you.

Posted 1 year ago #

pfg2009
Member

Your textures / sprites will appear as white rectangles if the texture isn't loaded on the same thread as the main GL drawing routine (If you want to get technical, it's something about GLCotext something rather - clearly I'm a technical guy :) ). So now you just need to hunt through your texture loading code and check to see why it's being loaded on the wrong thread.

I once had this same issue in my previous game and I couldn't find what was going on - I was diligently loading all of my textures on the same thread. Well, what I finally discovered was that even though I loaded everything correctly, I was sometimes positioning things (sprites, labels, ...) on helper threads. Sometimes my app would receive memory warning and it would dump all unused textures. When I then tried to place a sprite on a helper thread, that sprite automatically re-loaded the dumped texture, but on the wrong thread! So, I watch for that type of error now.

Posted 1 year ago #
srikanth
Member

@pfg2009,
Thank you for clear explanation.
I am not creating any new threads in my game. When I run in debugger it shows the usage of 5 threads.
But I am not familiar with threads. I will learn them.

But, How did you make the problem clear.
How can I make them run on single thread ?
Should I use performSelectorOnMainThread ?

Thank you.

Posted 1 year ago #

srikanth
Member

I am using

Here restartDirector was method written in appDelegate.

[MY_DELEGATE restartDirector];
[self performSelectorOnMainThread:@selector(SelMethod:) withObject:nil waitUntilDone:YES];

-(void)SelMethod:(id)sender
{
	CCScene *endPageScene = [CCScene node];
	CCLayer *endPageLayer = [PracticeScreen node];

	[endPageScene addChild:endPageLayer];
	[[CCDirector sharedDirector] runWithScene:endPageScene];
}

But, still i am getting the white boxes on sprites and labels. Some times they are appearing on whole screen.

Posted 1 year ago #

pfg2009
Member

Hmm... hard to say what's going on. If you are only using a single thread, you should be fine. Also, no need to call performSelectorOnMainThread. All you need to do is

[self performSelector:@selector(MyMethodWithoutArguments)]; ...
-(void) MyMethodWithoutArguments { ... }

No need to get fancy. I'm not sure what else might be going wrong. This is where my knowledge of white boxes ends. Sorry.

Posted 1 year ago #
adik
Member

Thanx srikanth,

[self performSelectorOnMainThread:withObject:waitUntilDone:] worked for me! :)

Posted 1 year ago #

RSS feed for this topic

Reply

You must log in to post.