cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   d-range
   Member

   Hi guys,

   I just started with Cocos2D 2 days ago writing a simple game, and so far it has been an absolute breeze, I really enjoy the API and the way it works, great job! I do have a (relatively minor) issue right now, and I can't seem to find anything about it on the forum or elsewhere on the internet. The problem is that the FPS counter does not show, even though I enabled it. Not in the simulator, not on the device. Otherwise everything is working as expected (ie: the Director fires, the scene I'm displaying gets updated, etc).

   I used the sample code on the Wiki to setup my scene like this:

   -(BOOL) application: (UIApplication *) application didFinishLaunchingWithOptions: (NSDictionary *) launchOptions
   {
     // Forcibly hide the status bar, since I can't get the damn thing to disappear just
     // by setting the 'None' property in the UI Builder
     [[UIApplication sharedApplication] setStatusBarHidden:YES withAnimation:NO];
   
     // The following code is all Cocos2D view/buffer setup
     [CCDirector setDirectorType:kCCDirectorTypeDisplayLink];
   
     _director = [CCDirector sharedDirector];
   
     [_director setDeviceOrientation:kCCDeviceOrientationLandscapeLeft];
     [_director setAnimationInterval:10];
     [_director setDisplayFPS:YES];
   
     EAGLView *glView = [EAGLView viewWithFrame:[self.window bounds]
                                    pixelFormat:kEAGLColorFormatRGBA8
                                    depthFormat:GL_DEPTH_COMPONENT24_OES
                             preserveBackbuffer:NO];
   
     [_director setOpenGLView:glView];
   
     [CCTexture2D setDefaultAlphaPixelFormat:kCCTexture2DPixelFormat_RGBA8888];
   
     /// \todo this is iPhone-4 specific, need to check on actual hardware
     //
     //   [director setContentScaleFactor:2];
   
     [self.window addSubview:glView];
     [self.window makeKeyAndVisible];
   
     // Create the 'maze' scene and set a maze on it
     //
     /// \todo in the finished game, the first scene to display should of course
     ///    not be the maze itself, but a title screen or something similar
     _scene = [AnonMazeScene node];
   
     AnonMaze *maze = [[[AnonMaze alloc] initWithWidth:10 height:10] autorelease];
   
     [_scene setMaze:maze];
   
     // Start director
     [_director runWithScene: _scene];
   
     return YES;
   }

   I'm using the last beta (0.99.5-beta2) with a 3GS that has 4.1 firmware, but I'm building with a 3.2 Base SDK for a 3.0 target. The target settings don't seem to have any effect on this issue by the way, so far I've never seen the FPS counter.

   Posted 1 year ago #
2. 

   joker
   Member

   Hi @d-range
   this is a long shot but when I first tried to show the FPS counter I found that I had deleted the bitmap font png that it relies on to display the numbers from my project.

   Posted 1 year ago #
3. 

   d-range
   Member

   A long shot indeed, but a pretty good one actually! Now that you mention it I realize that I didn't add the font at all. It just never occurred to me I had to, because the docs don't say, I didn't use the Cocos2d templates, and I didn't open or build any of the Demo projects in Xcode itself to find out the font was in there ;-)

   I'm going to try this out ASAP when I get home, thanks!

   Posted 1 year ago #
4. 

   joker
   Member

   Once I had the FPS display working all I then had to do was get it to say '60.0' ...

   Posted 1 year ago #
5. 

   chrisco
   Member

   @joker - that's not as hard as it seems, though you have to modify some Cocos2D source.

   In CCDirector, just modify the -showFPS method like so:

   -(void) showFPS
   {
   
          [FPSLabel setString:@"60.0"];
          [FPSLabel draw];
   
   }

   Now all my games display a smooth 60 fps. Hmmm, maybe I should submit this as enhancement ;)

   Posted 1 year ago #
6. 

   joker
   Member

   @chrisco - Thanks, that's much easier than all the other stuff I was trying!

   Posted 1 year ago #
7. 

   d-range
   Member

   Adding the font fixed it, thanks joker! It sits around 7 fps though, so still a long way to go to get that 60 fps :-P

   Posted 1 year ago #
8. 

   GPP
   Member

   Heya folks, I am playing around with Nat's game kit, and trying to figure out how to enable the actual FPS Count.

   So I typed in the App.h file this:

   -(void) showFPS;

   And then going into App.m and typing

   -(void) showFPS

   {

   [FPSLabel setString:@"60.0"];
   [FPSLabel draw];
   }

   Frankly, I'm not sure what I am doing, but I am trying to tell the program to display the Frame Count, whatever it is. So that FPSLabel (which wasn't defined and so caused a Build Failure) was an incorrect approach anyway.

   But am I on the right track?

   Posted 6 months ago #
9. 

   pimms
   Member

   You need to get the delta-time in order to calculate the correct FPS. All update methods([self scheduleUpdate]) gets ccTime dt as a parameter. You can set the string inside the update, or pass it on to [self showFPS:dt].

   -(void) update:(ccTime)dt {
       [FPSLabel setString: [NSString stringWithFormat:@"%0.1f", 1.f/dt] ];
   }

   Although that's quite the workaround as the CCDirector can do this by default.
   [[CCDirector sharedDirector] showFPS:YES];
   or something quite similar will make it appear.

   Posted 6 months ago #

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