How to Handle Different Floor Heights in the Retargeting Layer?

[cademadema]

Hi,

I'm trying to figure out how to support different floor height levels within the retargeting layer.

I came across the Grounding Constraint script used in some sample projects, but I couldn't get it to work with the retargeting layer.

In our project, we need to walk up and down, following the real-world environment. Right now, only the boot position seems to determine the floor level.

I've checked the documentation but couldn't find any guidance on using colliders as the floor or any similar approach.

Could someone point me in the right direction on how to achieve this?

Thanks!

[andkim-meta]

Hello, by default, the retargeted character will reflect the body tracking, so if the user in the real world is higher than the boundary's floor level, the retargeted character will also be higher. For making the character stay grounded even in those scenarios, we would recommend adding a script to adjust the Y position of the character's hips at the end of Unity's LateUpdate call such that the feet stay grounded - this can be done by taking into account the character's expected height. If you're wanting to ground the character and prevent clipping through the environment when changing floor heights virtually but not in the real world, we would still recommend the same method of adjusting the Y position of the character's hips. However, after adjusting the position, an additional IK step should be run to ground the character to the environment and align the feet so they don't clip through the environment.

[cademadema]

Hi,

thank you for your answer.

I've tried to update the hips on the LateUpdate but nothing moved unless I deactivate the retargeting layer.

But I think the issue is a bit deeper, as in our case we start the headset inside a place that is higher and then we go more down. And the legs are bent all the time when we go downer from boot position.

And we have a virtual floor that is exactly the dimension of the real floor, and placed at the right position with spatial anchor.

Thank you for your help

[andkim-meta]

Thanks for explaining your scenario further. If we understand your scenario correctly, we don't support this feature. You have a virtual plane that reflects the real world floor whereas the body tracking algorithm only has access to the single floor level from the guardian. As a result, the body tracking skeleton will use the single guardian level calibrate according to it. We don't have any way to update that dynamically. As a result, the tracking skeleton will behave as if it is operating on a flat plane at the same level as where it was calibrated.

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