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3. All non-reference points are interpolated between two reference points

according to the following rules:

a) If the contour has only one reference point, it is shifted with that point:

b) If a point is between two reference points, it is proportionally

interpolated:

Reference point 2

Reference point 1

c) If point is outside the interpolated points, it is shifted with the closest

reference point:

Reference point 1

Reference poin t 2