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Quaternions and gimbal lock?

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Hey Houdini people, 

I am currently trying to wrap my head around rotations in Houdini and struggling with gimbal lock. I have an object flying around in space and I want to try and take away all but maybe 50% of the rotation and snap it to the origin. This is fine, but if my object rotates further then 90 degrees, it flips. I know this is due to gimbal lock and I have been trying to understand things better and find a solution. I read that using quaternions can fix gimbal lock but I am not sure how to approach this. I am using them in my file but I seem to be not getting something right, as my object still flips. I would be really grateful if someone could help me with this and explain this to me as I really want to understand what's going on. 

I attached an example file :)

Thank you!


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