ShadowReaching: New Perspective on Wall Display Interaction
We introduce Shadow Reaching, an interaction technique
that makes use of a perspective projection applied to a
shadow representation of a user. The technique was designed
to facilitate manipulation over large distances and
enhance understanding in collaborative settings. We describe
three prototype implementations that illustrate the
technique, examining the advantages of using shadows as
an interaction metaphor to support single users and groups
of collaborating users. Using these prototypes as a design
probe, we discuss how the three components of the technique
(sensing, modeling, and rendering) can be accomplished
with real (physical) or computed (virtual) shadows,
and the benefits and drawbacks of each approach.