Optimal Close-up Views for Precise 3D Manipulation
Direct manipulation can be used as an intuitive interface for
spatial interaction with multiple objects in virtual
environments. However, users often have difficulties in precisely
manipulating objects in the 3D space; this is mainly because the
user is not provided with enough visual information to
sufficiently recognize the spatial relationships among objects.
We present a new method for improving the preciseness of object
manipulation in the 3D space by providing the user with an
auxiliary view that is consistently retargetted to closely
highlight the spatial relationship between the manipulated object
and the object nearest to it. Both the target and the position of
the auxiliary camera are computed efficiently using the bisector
surface of the two involved objects. The viewing target is set to
the center of the closest area between the two objects, and the
camera position is optimized under an objective function
primarily measuring the visual clarity of the auxiliary view. We
demonstrate the usefulness of our method through various
experiments based on practical usage scenarios.
Myung Geol Choi, The Catholic University of Korea.
Ji Hye Lee, The Catholic University of Korea.
Wansu Ha, Kwangwoon University.
Kang Hoon Lee, Kwangwoon Uinversity.
Myung Geol Choi, Ji Hye Lee, Wansu Ha, Kang Hoon Lee, Optimal Close-up Views for Precise 3D Manipulation.
Computer Animation and Virtual World (CASA 2019), Volume 30, Issue 3-4, e1884.