https://playground.babylonjs.com/#1ST43U#653
For a box, I know the box.rotationQuaternion, how can I adjust the box.rotationQuaternion to rotate 180 degrees along the x-axis?
Related Idea: QuaternionRotation follow by a QuaternionRotation
https://playground.babylonjs.com/#1ST43U#653
For a box, I know the box.rotationQuaternion, how can I adjust the box.rotationQuaternion to rotate 180 degrees along the x-axis?
Related Idea: QuaternionRotation follow by a QuaternionRotation
Here are 4 methods to rotate your box 180 degrees on the X axis:
Rotation | Babylon.js Playground (babylonjs.com)
It all depends on the way you want to do it, of course. But the idea is - multiplication 
This looks awesome.