I want to use a only accelerometer. So I am using a Function : "fRun_3DOF_G_BASIC"
My Question is :
fRun_3DOF_G_BASIC has a LPF Function "fLPFOrientationQuaternion"
and the rotation matrix should convert into Quaternion for Low pass filter.
is it impossible that Rotation matrix has Low pass filter directly without converting Quaternion??
Why they go through the step 1, 3 bearing the loss of time
step 1 : fQuaternionFromRotationMatrix
step 2 : fLPFOrientationQuaternion
step 3 : fRotationMatrixFromQuaternion
step 4 : fNEDAnglesDegFromRotationMatrix