cocos2d for iPhone

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

1. 

   zeckman
   Member

   Hi,

   i need to add a 3d model viewer functionality to an existing iphone app. User should be able to click a button and then a new view with the 3d model displayed should appear. The view should not be fullscreen. Once the view becomes visible i want to laod a 3d model and display it.
   I know cocos3d can display 3d models easily but i'm not sure if i can do the following:

   1) setup xcode so i can use cocos3d inside an app that started without using it...
   2) display cocos3d layer in a reusable custom view. I think i need to manually create an opengl view and set it to the CCDirector. This view is then added to the existing UI. Maybe this view may always exist in memory but become visible only if needed (performance issue?). The 3d model should be rotated touching the view but i suppose that's very easy to do with cocos3d (or just manipulating view matrix, i'm familiar with 3d programming on other platforms)
   3) start/stop the CCDirector update/render on demand (as i said above, i could just hide the opengl view when i don't want to render it)

   please someone could tell me best method to achieve the above points? I already used cocos2d (not 3d) in the past.
   Alternative solution would be to drop cocos at all and use pure opengl es, but i fear it could be very hard to learn and i need to finish the project in a couple of weeks...

   Please help!

   Posted 3 months ago #
2. 

   Rocketman697
   Member

   zeckman,

   See my post Working with Storyboards and Cocos3d on Xcode 4.2 for iPhone. This should point you in the right direction on how to create a cocos3D ViewController inside another project.

   Also look at Bill's code in CC3DemoMashup on creating a HUD. In the method openGlobeHUDFromTouchAt will see how to create a window that is not full screen.

   Regards,
   Glenn

   Posted 3 months ago #
3. 

   zeckman
   Member

   That's very usefull indeed, thanks. Just one thing remains unanswered. That explanation starts from a cocos3d project with all libs already setup. I'd like to add cocos3d to an already existing project so i need to do all config by hand.
   Maybe i can just create a new cocos3d project and add already existing classes/views to it? Doing so could cause me some problems with the original author of the project but i can do it if necessary.

   Posted 3 months ago #
4. 

   Rocketman697
   Member

   Probably easier to bring in your code into a cocos3D project. I haven't done it the other way, though I'm sure it's possible. If you use ARC, you will need to disable it for all of the cocos2D and cocos3D files.

   Posted 3 months ago #
5. 

   Bill Hollings
   Moderator

   @zeckman

   I agree with Rocketman697 that the best thing to do is to start with a cocos3d template.

   But, if you need to, you can add cocos3d to an existing cocos2d app as follows:

   • Drag the cocos3d 0.6.5/cocos3d folder into Xcode, and choose the "Copy items...", option.
   • To get things working in glorious 3D, instead of 2D, you also need to instantiate the EAGLView differently. Open the cocos3d hello, world template app and copy code from the AppDelegate class into the AppDelegate of your project.
   • While the cocos3d project is open, you should also scan through the build settings and grab anything that looks different. In particular, the Preprocessor macros in the cocos3d project are very useful during development and debugging.

   Caveat emptor. I may have missed something above...so post back here if you have trouble.

   ...Bill

   Posted 3 months ago #

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