Float32 issues resulting in wrong controllers moves

[AnthonyGlt]

Hello, thank you for this repo.

I'm working on the implementation of the VR controllers support in iTowns.

Since we are working in gps/global coordinates, I'm facing some difficulties to set the referenceSpace correctly.

By using this king of coordinates, we are overflowing the float32 arrays used in XRRigidTransform (and more generally in the definition of ReferenceSpace). The resulting matrix has only rounded numbers to fit as float32.
(A bit related to #1236)

const transform = new XRRigidTransform(new Vector3(4485948.637198923, 476198.0416370128, 4497216.056600053), quat);
const baseReferenceSpace = xr.getReferenceSpace();
const teleportSpaceOffset = baseReferenceSpace.getOffsetReferenceSpace(transform);
xr.setReferenceSpace(teleportSpaceOffset);

The consequences are that my controllers are moving in some kind of stairways pattern, not smoothly (see the video)

Do you have a way to correct this ?

Thank you
iTowns related issue

Screencast.from.16-01-2025.11.40.50.webm