UIWindow UIViewcontroller UIView and ogre - a guide

[dowi]

hi all

after hours of searching and trying i've managed to control the location of ogre in the hierarchy of my application and thought i'll share my experience (and thanks to masterflacon).

the steps are:

1. start a new project so that everything is attached in the MainWindow
2. add OgreDemoApp and OgreFramework fro the template
3. add a pointer to a new variable of type OgreDemoApp
4. instantiate your pointer wherever you want using 'mOgre = new DemoApp();'
4. copy the function "go" from the template
5. call go function to when you want to start rendering
6. dont forget to take the - (void)renderOneFrame:(id)sender and the rest of the 'application' functions you want from the AppDelegate class

if you want another viewcontroller on top of ogre: (for example for touch interface)
1. add a UIViewController
2. add the folowing

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window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];  // of type uiwindow
    
mTouchViewController = [[TouchViewController alloc] initWithNibName:@"TouchViewController" bundle:nil delegate:self];
window.rootViewController = mTouchViewController; //if you want uiview it'l be [window addSubview:yourView];

to control the hierarchy of the windows:
1. get Ogre uiwindow via: (in OgreFramework::initOgre)

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..
m_pRenderWnd = m_pRoot->initialise(true, wndTitle);
..

RenderWindow *mWindow = Ogre::Root::getSingleton().getAutoCreatedWindow();
mWindow->getCustomAttribute("WINDOW", &mUIWindow);  //mUIWindow is of type UIWindow

now that you have (in this case 3) UIWindows you can control their levels :

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//window is a UIWindow
window.windowLevel = 3.0 ; // a float

to make Ogre's background transparent all i did was: (in OgreFramework::initOgre)

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UIView *view;
mWindow->getCustomAttribute("VIEW", &view);
view.layer.opaque = NO;
....
m_pViewport->setBackgroundColour(ColourValue(0.0f, 0.0f, 0.0f, 0.0f));

hope it'll help someone.

dowi