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Vuforia Internal Rotation Methods and its relation to Unity Internal Rotation Methods

January 5, 2015 - 1:00am #1

Hi, I am new to Vuforia and is still trying to grasp its inner workings with regard to its intergration to Unity.

I am using Vuforia in my research and I would really appreciate it if someone can point out the rotation method used when Vuforia is used as an extension with Unity.

Does the right hand coordinate system of camera as world center apply when it is used as Unity Extension?

Is the rotation based on Vuforia's internal rotation calculation method or does it utilize the same method as Unity.
I personally suspect that Vuforia is using its own internal calculation method.
And if so, can you enlighten me to the calculation methods involved? (eg, using quarterion, with the order of xyz axis when rotating, etc etc)

I really appreciate the help.
I thank you in advance!

Vuforia Internal Rotation Methods and its relation to Unity Inte

January 14, 2015 - 11:52am #4

While Vuforia internally uses right-handed coordinate space as the FAQs show, the Vuforia plug-in for Unity converts all data over to Unity's left-handed coordinate space. Any interactions between your app and Vuforia for Unity will be using left-handed coordinate space. For the native iOS and native Android versions of the Vuforia SDK, the right-handed coordinate space is used.

Vuforia Internal Rotation Methods and its relation to Unity Inte

January 13, 2015 - 4:30am #3

Thanks!!

Btw, one more question, does Vuforia converts the right hand coordinates to left hand coordinates of Unity when it is used as a Unity plugin extension, in the sense that the values i get using unity function are already converted ones that uses left hand coordinates of Unity?

I thank you in advance!! :D

Vuforia Internal Rotation Methods and its relation to Unity Inte

January 12, 2015 - 1:03pm #2

Unity uses a left-handed coordinate system and quaternions for rotation. Vuforia uses a right-handed coordinate system and these two Dev-Guide articles explain the pose and projection matrices:

https://developer.vuforia.com/resources/dev-guide/pose-matrix-explained

https://developer.vuforia.com/resources/dev-guide/projection-matrix-explained

 

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