Novel Indirect Touch Input Techniques Applied to Finger-Forming 3D Models

We address novel two-handed interaction techniques in dual display interactive workspaces combining direct and indirect touch input. In particular, we introduce the notion of a horizontal tool space with task-dependent graphical input areas. These input areas are designed as single purpose control elements for specific functions and allow users to manipulate objects displayed on a vertical screen using simple one- and two-finger touch gestures and both hands. For demonstrating this concept, we use 3D modeling tasks as a specific application area. Initial feedback of six expert users indicates that our techniques are easy to use and stimulate exploration rather than precise modeling. Further, we gathered qualitative feedback during a multi-session observational study with five novices who learned to use our tool and were interviewed several times. Preliminary results indicate that working with our setup is easy to learn and remember. Participants liked the partitioning character of the dual-surface setup and agreed on the benefiting quality of touch input, giving them a 'hands-on feeling'.