We present three novel teleportation-based techniques that enable users to adjust their own scale while traveling through virtual environments. Our approaches build on the extension of known teleportation workflows and suggest specifying scale adjustments either simultaneously with, as a connected second step after, or separately from the user's new horizontal position. The results of a user study with 30 participants indicate that the simultaneous and connected specification paradigms are both suitable candidates for effective and comfortable multi-scale teleportation with nuanced individual benefits.
We present an enhanced version of the score-based selection technique IntenSelect called IntenSelect+ to overcome multiple shortcomings of the original approach. In an empirical within-subjects user study with 42 participants, we compared IntenSelect+ to IntenSelect and conventional raycasting on a variety of complex object configurations motivated by prior work. In addition to replicating the previously shown benefits of IntenSelect over raycasting, our results also demonstrate significant advantages of IntenSelect+ over IntenSelect regarding selection performance, task load, and user experience.
We present three teleportation techniques that enable the user to travel not only to ground-based but also to mid-air targets. The techniques differ in the extent to which elevation changes are integrated into the conventional target selection process, either simultaneously, as a connected second step, or separately from horizontal movements. Based on the results of a user study with 30 participants, we define initial design guidelines for mid-air navigation techniques in virtual reality.
Group navigation techniques should be comprehensible for both the guide and the attendees, assist the group in avoiding collisions with obstacles, and allow the creation of meaningful spatial arrangements with respect to objects of interest. To meet these requirements, we developed a group navigation technique based on short-distance teleportation and evaluated it in an initial user study.
We present a novel collaborative virtual reality system that offers multiple immersive 3D views at large 3D scenes. The physical setup consists of two synchronized multi-user 3D displays - a tabletop and a large vertical projection screen. Our developments enable seamless 3D interaction across these independent 3D views.
We analyzed the design space of group navigation tasks in distributed virtual environments and present a framework consisting of techniques to form groups, distribute responsibilities, navigate together, and eventually split up again. To improve joint navigation, our work focused on an extension of the Multi-Ray Jumping technique that allows adjusting the spatial formation of two distributed users as part of the target specification process.