Rotating only around y axis

[Carli]

Hi.
I'm writing a character controler and don't know how to determine the rotation to only the Y-Axis.
i used the search-function but none of them fitted to my issue.

[Julio Jerez]

you need to use an upvector joint,

[JernejL]

It is unclear what exactly you want (limit angles or get angles) so this will explain both:

Like Julio said, using NewtonConstraintCreateUpVector you can limit rotation to just 1 axis.
Using a newton function NewtonGetEulerAngle you can extract euler angles (in radians) from a matrix, using that you can find out the "heading" / Y rotation of the body.

[Carli]

thank you.
In the end, i will need both.