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Shaping a Tubular B-Spline Surface
Shaping a Tubular B-Spline Surface
The tubular B-spline surface is closed at one end by a movable closing point. This closing point influences two upper rows of control points in the control net, which can be seen by switching it on. The wavy shape is generated by the transformation of the third row of control points in the control net. After "reset", the position of the closing point is fixed—choose one of the other two options for further manipulation.