Abstract
ScrewBall is an extension of the ArcBall implementation of a notional thumb-ball, visible on the screen and activated by desk-top mouse movements, which provides an acceptable user interface for specifying rotational displacements of computer-graphical objects. The ScrewBall extension permits specification of general displacements — i.e. of mixed translations and rotations — by allowing the user to specify a finite displacement screw or, equivalently, the vector part of a unit biquaternion. The paper describes the mathematical basis of ScrewBall, its relationship with ArcBall, and the computer-graphical context in which it would be applied.
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© 1996 Kluwer Academic Publishers
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Parkin, I.A. (1996). Screwball: A User Interface for Specifying Screws. In: Lenarčič, J., Parenti-Castelli, V. (eds) Recent Advances in Robot Kinematics. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-1718-7_29
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DOI: https://doi.org/10.1007/978-94-009-1718-7_29
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-7269-4
Online ISBN: 978-94-009-1718-7
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