Imu prototype

[jckras]

This is a draft of the flutter imu prototype

Current challenges:

• Really hard to get an accurate position from acceleration alone
  • With low filtering, seeing lots of drift
  • With high filtering, missing small accelerations, position is inaccurate
• User error because it's hard to move hand in a straight line through open space
• moveToPosition calls can be slow, we have a lot of positions in the queue to get through
  • More positions = slower
  • Less positions = choppier
• Speed of movement is too big of a factor
  • User wouldn't to move phone quickly, but then small accelerations are missed
  • We found that moving quickly is more accurate, but we understand is weird
• Orientation
  • We really cannot figure out how to get from the gyroscope to the orientation vector
    • Need spatial math library in dart?