Getting `ground_friction_values` as `asset.data.joint_friction_coeff[:, env.feet_ids]` in `compute_privileged_observations`

[MinchoU]

Hi.

I observed that your code was getting ground_friction_values as asset.data.joint_friction_coeff[:, env.feet_ids] in the compute_privileged_observations function in this code.

I guess it should be asset.root_physx_view.get_material_properties()[:, env.feet_ids, 0].to(env.device) to get the static friction of the feet properly. Unless, it would output zero value.

Thanks!