Default aim-child overrides for Mixamo-rigged humanoids.
Redirects the short / noisy XR spine segments to longer, stable ones so that
IWebXRBodyTrackingOptions.useBoneOrientationOffsets produces clean
torso rotations. In WebXR data, hips→spine-lower is typically only ~1 cm
apart — too short to give a stable aim direction — so we reroute Mixamo's
Hips/Spine/Spine1 bones to aim at spine-upper / neck instead.
Default aim-child overrides for Mixamo-rigged humanoids.
Redirects the short / noisy XR spine segments to longer, stable ones so that IWebXRBodyTrackingOptions.useBoneOrientationOffsets produces clean torso rotations. In WebXR data,
hips→spine-loweris typically only ~1 cm apart — too short to give a stable aim direction — so we reroute Mixamo's Hips/Spine/Spine1 bones to aim atspine-upper/neckinstead.