Hi Lenny,
I am not familiar with iOS so can't provide specific answers. I do
vaguely recall some submissions from contributors working under iOS
that related to aspect ratio so there is change that OSG-3.2 might
address some of the issues, this is long shot suggestion though but
might be worth a try.
You don't mentin which version of iOS and OSG you are using so it'd be
useful passing this on as it may well be important, members of the OSG
community iOS will then have a bettle handle on what might the best
way forward.
Cheers,
Robert.
On 26 July 2013 09:41, Lenny Becho <quad...@walla.com> wrote:
> Hi,
>
> I'm trying to render a scene onto a UIView that's part of a UIViewController,
> so that I can have iOS UI overlay on top of the OSG view.
> I tried to achieve this by using the GraphicsWindowIOS class and binding it
> to my internal view. This works fine except for one issue, the scene seems
> stretched horizontally (in landscape orientation), even though its rendered
> at fullscreen and there's no resizing happening.
> This is the relevant part of the code I'm using:
>
> Code:
>
> osg::ref_ptr<osg::GraphicsContext::Traits> traits = new
> osg::GraphicsContext::Traits;
> CGRect lFrame = [self.osgView convertRect:self.osgView.frame
> fromView:[UIApplication sharedApplication].keyWindow];
> unsigned int w = lFrame.size.width * [[UIScreen mainScreen] scale];
> unsigned int h = lFrame.size.height * [[UIScreen mainScreen] scale];
>
> osg::DisplaySettings* settings = osg::DisplaySettings::instance();
> settings->setNumMultiSamples(4);
>
> osg::ref_ptr<osgViewer::GraphicsWindowIOS::WindowData> windata = new
> osgViewer::GraphicsWindowIOS::WindowData(self.osgView,
> osgViewer::GraphicsWindowIOS::WindowData::LANDSCAPE_LEFT_ORIENTATION, -1.0f);
>
> // Setup the traits parameters
> traits->x = lFrame.origin.x * [[UIScreen mainScreen] scale];
> traits->y = lFrame.origin.y * [[UIScreen mainScreen] scale];
> traits->width = w;
> traits->height = h;
>
> traits->windowDecoration = false;
> traits->doubleBuffer = true;
> traits->sharedContext = 0;
> traits->setInheritedWindowPixelFormat = false;
> traits->inheritedWindowData = windata;
>
> // Create the Graphics Context
> osg::ref_ptr<osg::GraphicsContext> graphicsContext =
> osg::GraphicsContext::createGraphicsContext(traits.get());
>
> _root = new osg::MatrixTransform();
>
> osg::ref_ptr<osg::Node> model = (osgDB::readNodeFile("full.ive"));
> _root->addChild(model);
> _viewer = new osgViewer::Viewer();
>
>
> if(graphicsContext)
> {
> _viewer->getCamera()->setGraphicsContext(graphicsContext);
> _viewer->getCamera()->setViewport(new
> osg::Viewport(traits->x, traits->y, traits->width, traits->height));
> }
>
> _viewer->setSceneData(_root.get());
> _cameraManipulator = new osgGA::MultiTouchTrackballManipulator();
> _viewer->setCameraManipulator(_cameraManipulator);
> _viewer->realize();
>
> // draw a frame
> _viewer->frame();
>
>
>
>
> Here are my insights so far:
> I tried playing with the traits parameters and that had no effect.
> Using view.bounds or just view.frame as the lFrame also has no effect.
> As I'm testing this on an iPhone 5, the only scale parameter from the OS that
> would get the right value was [[UIScreen mainScreen] scale], using
> view.contentScaleFactor returned 1 which was incorrect.
>
> The most import thing I noticed was that if I do not use a graphics context
> (for example by commenting out the setGraphicsContext line) the view appears
> on the entire screen (like before) but with the correct aspect ratio, again,
> even though there is seemingly no difference in the view's size.
>
> I'm relatively new to OSG and I've been struggling with this issue for a
> couple of days now so any tips on how to fix it will be greatly appreciated.
>
> Thank you!
> [/code]
>
> ------------------
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=55456#55456
>
>
>
>
>
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