Exploring Interactive Curve and Surface Manipulation Using a….pdfVIP

Exploring Interactive Curve and Surface Manipulation Using a Bend and Twist Sensitive Input Strip 1,2 1 1 1 Ravin Balakrishnan , George Fitzmaurice , Gordon Kurtenbach , Karan Singh 1Alias|wavefront 2Department of Computer Science 210 King Street East University of Toronto Toronto, Ontario Toronto, Ontario Canada M5A 1J7 Canada M5S 3G4 {ravin | gf | gordo | ksingh }@ ravin@ Abstract physical tools which flex to produce curves (e.g., flexible steels). Because virtual manipulation and physical manipulation of curves We explore a new input device and a set of interaction techniques are so different, a designer’s physical modelling skills do not to facilitate direct manipulation of curves and surfaces. The input wholly transfer to virtual modelling. For example, a designer can device, called ShapeTapeTM, is a continuous bend and twist sensi- express a particular shape using a flexible french curve by simply tive strip that encourages manipulations that use both hands and, at bending the french curve. However, with a virtual curve it may not times, all 10 fingers. We explore this input and interaction design be clear how the control vertices need to be placed to attain thi