Possible to keep openGL in portrait mode while allowing autorotation?

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Possible to keep openGL in portrait mode while allowing autorotation?

(4 posts) (2 voices)

Started 1 year ago by abitofcode
Latest reply from abitofcode

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abitofcode
Moderator

I need my openGL view to remain in constant portrait mode while I rotate other UIView based stuff based on the current orientation.

I'm currently going down the lines of using the accelerometer to detect the current orientation and orientate the subView accordingly using the following for inspiration http://blog.sallarp.com/iphone-accelerometer-device-orientation/

Any ideas? Does this look reasonable or is there a way of using the standard autorotation stuff (maybe rotate the openGL view against the rotation) :s

Posted 1 year ago #
abitofcode
Moderator

Still a work in progress but I ended up adding a view with a view controller to the openGL view. The viewcontroller handler the autorotation of the subview well enough the only 2 issues now are;

1. Coordinate system for the openGl view goes screwy with each rotation.
2. I've lost multitouch (similar to the issue in the latest 0.99 dev build) http://www.cocos2d-iphone.org/forum/topic/8835

So other than it being single touch and not being able to predict where that touch is coming from, it's fixed ;)

Posted 1 year ago #

riq
Key Master

regarding your 1st question, you can detect autorotation by using the NSNotification object.

Example taken from here:

[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
	[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(newOrientation:) name:@"UIDeviceOrientationDidChangeNotification" object:nil];

Posted 1 year ago #

abitofcode
Moderator

Thanks @riq, that works a treat. Thought I'd done a search for all combinations of auto, rotate and rotation but missed that post.

Going to have a play over the next couple of days and try and sort out number 2.

Posted 1 year ago #

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