ocr: 1-1: A spline consisting of 2 knots and 1 segment. 1-2: A spline consisting of 3 knots and 2 segments. 1-3: A closed spline consisting of 4 knots and 4 segments. the number of knots is always equal to the number of segments for a closed spline). 1-4: TwO splines which has been connected. 1-5: Another examp le of two connected splines, this time they have been connected at the endpoints.
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