new_contents: import sys
  import time
  import openvr
  
  openvr.init(openvr.VRApplication_Scene)
  
  poses_t = openvr.TrackedDevicePose_t * openvr.k_unMaxTrackedDeviceCount
  poses = poses_t()
  
  while True:
      openvr.VRCompositor().waitGetPoses(poses, len(poses), None, 0)
      hmd_pose = poses[openvr.k_unTrackedDeviceIndex_Hmd]
      #print(hmd_pose.mDeviceToAbsoluteTracking)
      print(poses[3].mDeviceToAbsoluteTracking)
      sys.stdout.flush()
      time.sleep(0.2)
  
  openvr.shutdown()
  
  '''
  poses[0] = Headset
  poses[1] = basestation??
  poses[2] = ???
  poses[3] = controller 1
  poses[4] = controller 2
  
  [[?,   ?,   ?, X(?)],
   [?,   ?,   ?, Y(?)],
   [Yaw, ?,   ?, Z(?)]]
  '''
  
subject: Add file for tracking Vive data