Obtaining orientation from an IMU

Steady Sense - Proception - Google Drive so within this code it assesses orientation of segments relative to a cartesian plane that is orientated to the direction of one of the IMUs is facing. In function it has an IMU on a shank, thigh, lower back and upper back. It assesses foot position compared to centre of mass (has a calculation based on anthropometric measures) relative to the direction the lower back is facing and represents this by vibration where distance is represented by speed and amplitude, with a different coin representing each direction. So how far down, how far in front and how far to the side is your foot compared to your centre of mass with 0 being neutral standing

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