osvr_server_config.json

{
    /*
    This configuration supports the MRI plug-in for sharing an OSVR HDK IMU
    and the OSVR provided dead-reckoning of the IMU.
    */
    "display": "displays/OSVR_HDK_1_1.json",
    "renderManagerConfig": "sample-configs/renderManager.direct.portrait.json",
    "drivers": [
        {
            "plugin": "org_osvr_filter_deadreckoningrotation",
            "driver": "DeadReckoningRotationTracker",
            "params": {
                "name": "FilteredHead",
                "input": "com_motionreality_OSVR_SharedIMU/OSVR_SharedIMU",
                "numSensors": 1,
                "predictMilliSeconds": 20 /* Tweak this */
            }
        }
    ],
    "aliases": {
        "/headspace": {
            /* This alias is needed because the Dead Reckoning rotation plugin device description
               accesses the raw IMU data and ignores the OSVR-SharedIMU device descriptor. This
               means that the output format matches the input format and isn't corrected by a
               built-in descriptor. We add this alias here to correct for that. */
            "rotate": {
                    "axis": "x",
                    "degrees": 90
                },
                "child": {
                    "changeBasis": {
                        "x": "-x",
                        "y": "-z",
                        "z": "y"
                    },
                    "child": "/org_osvr_filter_deadreckoningrotation/FilteredHead/tracker/0"
                }
        },
        "/me/head": "/headspace"
    }
}