public static Result <int, string> RightControllerIndex(this CVRSystem hmd)
{
if (hmd == null)
{
throw new ArgumentNullException(nameof(hmd));
}
int?rightContIndex =
hmd.DevicesInClass(ETrackedDeviceClass.Controller)
.SingleOrDefault(i => hmd.GetControllerRoleForTrackedDeviceIndex((uint)i) == ETrackedControllerRole.RightHand);
return(rightContIndex == null ? Result <int, string> .Err("No right controller") : rightContIndex.Value);
}
