Polka dot
Yohei Kojima, Taku Fujimoto, Yuichi Itoh, Kosuke Nakajima · 2013
Physical and tangible representations of information have provided users with direct control of digital information. Representing information in both tangible and intangible forms enables users to control the underlying digital representation more intuitively using their hands [Ishii, et al. 2008]. Though these tangibles accept user's input [Piper, et al. 2002], they cannot provide bi-directional physical interactions since their physical properties are not controlled by the computers. Therefore, it is difficult to represent dynamic changes of such physical properties as motion, size, and color.