In the future, MJX will support correctly simulating models with zero dofs.
PiperOrigin-RevId: 760731314
Change-Id: Iadddf80a959c64cddb31610e60927ae0437ebcaf
These io functions replace device_put, device_get_into. These new functions correctly copy intermediate fields such as efc_J, which the old functions could not.
PiperOrigin-RevId: 586712273
Change-Id: Ia3a4104af17db2ebd41b41a2ca501c5de9ac5d05