Quaternion not showing W, not allowing negative values in Inspector?

[InfiniteList]

Hi all!

I am trying to implement one of Meta’s Interaction examples and this script has a list of Quaternions that define Rotation Directions for a virtual cube. In Meta’s example scene the Rotation directions show up as a list of XYZW values and can be negative:

However, in my scene, using the same Unity version (2022.3.13f1) the Quaternions are only shown as XYZ values and don’t allow for negative values:

Both scenes use the same script. In both scenes the Rotation Directions are defined as Quaternion[ ]:

Does anyone know why my Quaternions are shown differently? Is there a way to set them as XYZW values?
Much thanks in advance!
IF

[Kurt-Dekker]

@ulibartels

the Quaternions are only shown as XYZ values and don’t allow for negative values:

These are “nice looking” euler angles values, not the actual internals of the Quaternion that matter.

The internal .x,.y,.z,.w values are NOT for you to use. (EDIT: unless, as @halley1 points out below, it’s what you need and what your data expects)

Here’s some more reading:

All about Euler angles and rotations, by StarManta:

https://starmanta.gitbooks.io/unitytipsredux/content/second-question.html

Quaternion dumper if you insist on peeking inside the ugly parts:

https://discussions.unity.com/t/920939/13

[halley]

In code, you can do whatever you want with the internals of the Quaternion.

The internal x,y,z,w values ARE for you to use, but Kurt’s warning is a generic adviso against it. Since you’re actively trying to work with another API that provides the x,y,z,w, his warning is not meant for your situation.

You will need to double-check that your API is providing you Quaternion values designed for a LEFT-HANDED UNIVERSE, or you will need to change the chirality with something like (x,y,-z,-w) yourself. You should only provide Quaternion values that are properly normalized. Normalize (x,y,z) then normalize (x,y,z,w) overall.