>>11048763make a list of ordered coordinates along the line
make a list of the vector difference between each pixel (velocity)
make a list of the vector difference between each point in the previous list (acceleration)
make a list of the vector difference between each point in the previous list (change in acceleration)
average the magnitudes of the list of changes in acceleration
divide that by the average of the magnitudes of the list of velocities (optional, depends on if step #1 always makes points in the same frequency)
the smaller the number, the smoother the curve. circle should be 0
