Getting HMD headings in Native app?

[scottoculus]

I know how to get HMD heading in degrees in Unity.  Whats' the recommended method with  Native 1.0?

[owenwp]

There are plenty of code snippets you can google for computing euler angles from a quaternion or matrix.  You have to decide for yourself how to handle gimbal lock at the poles.

[scottoculus]

So Oculus doesn't have even basic methods of providing headings? All I'm looking for is the same as Unity provides - euler.

[joan]

Saying just "Euler" is super ambiguous. Anyway, you can have a look at OVR_Math.h and especially Quat::GetEulerAngles and Matrix4::ToEulerAngles.

The difference with Unity is that the native API doesn't assume it knows your coordinate system, so you will probably have to work a little more to make sure you get what you want. There are a lot of ways to describe rotations.