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Published on Mar 20, 2010
This demonstrates the Ligne Claire, a marking-based technique for drawing splines. With it, one can edit, or modify a drawn line by drawing the change over it, rather than manipulating control points, etc.
This research behind this work was done by Thomas Baudel, with this version done in 1996 by Baudel while working at the Research Group at Alias|Research, Toronto.
Ref: Baudel, T. A Mark-based Interaction Technique for Free-Hand Drawing. Proceedings of the ACM UIST94 Conference on User Interface Software and Technology, 185-192.